diff --git a/toolchain/check/check_unit.cpp b/toolchain/check/check_unit.cpp
index 249a52be81da..f517f8ff7303 100644
--- a/toolchain/check/check_unit.cpp
+++ b/toolchain/check/check_unit.cpp
@@ -596,14 +596,28 @@ auto CheckUnit::FinishRun() -> void {
   context_.sem_ir().set_top_inst_block_id(context_.inst_block_stack().Pop());
   context_.scope_stack().Pop(/*check_unused=*/true);
 
-  // Finalizes the list of exports on the IR.
-  context_.inst_blocks().ReplacePlaceholder(SemIR::InstBlockId::Exports,
-                                            context_.exports());
-  // Finalizes the ImportRef inst block.
-  context_.inst_blocks().ReplacePlaceholder(SemIR::InstBlockId::Imports,
-                                            context_.imports());
-  // Finalizes __global_init.
-  context_.global_init().Finalize();
+  // Finalizes reserved blocks, using `ReservedIds` to avoid missing values.
+  for (auto reserved_id : SemIR::InstBlockId::ReservedIds) {
+    if (reserved_id == SemIR::InstBlockId::Empty) {
+      continue;
+    }
+    if (reserved_id == SemIR::InstBlockId::GlobalInit) {
+      context_.global_init().Finalize();
+      continue;
+    }
+
+    llvm::ArrayRef<SemIR::InstId> block;
+    if (reserved_id == SemIR::InstBlockId::Exports) {
+      block = context_.exports();
+    } else if (reserved_id == SemIR::InstBlockId::Generated) {
+      block = context_.generated();
+    } else if (reserved_id == SemIR::InstBlockId::Imports) {
+      block = context_.imports();
+    } else {
+      CARBON_FATAL("Unexpected reserved InstBlockId: {0}", reserved_id);
+    }
+    context_.inst_blocks().ReplacePlaceholder(reserved_id, block);
+  }
 
   context_.sem_ir().set_has_errors(unit_and_imports_->err_tracker.seen_error());
 
diff --git a/toolchain/check/context.h b/toolchain/check/context.h
index 9c121d169824..b48ee2de5da1 100644
--- a/toolchain/check/context.h
+++ b/toolchain/check/context.h
@@ -180,6 +180,8 @@ class Context {
 
   auto imports() -> llvm::SmallVector<SemIR::InstId>& { return imports_; }
 
+  auto generated() -> llvm::SmallVector<SemIR::InstId>& { return generated_; }
+
   // Pre-computed parts of a binding pattern.
   // TODO: Consider putting this behind a narrower API to guard against emitting
   // multiple times.
@@ -476,6 +478,14 @@ class Context {
   // This becomes `InstBlockId::Imports`.
   llvm::SmallVector<SemIR::InstId> imports_;
 
+  // Entities which are generated internally to the toolchain, to represent
+  // builtin concepts which should be dumped as part of `SemIR`. For example,
+  // when doing destruction, the `Destroy.Op` function is generated, and will be
+  // found here.
+  //
+  // This becomes `InstBlockId::Generated`.
+  llvm::SmallVector<SemIR::InstId> generated_;
+
   // Map from an AnyBindingPattern inst to precomputed parts of the
   // pattern-match SemIR for it.
   Map<SemIR::InstId, BindingPatternInfo> bind_name_map_;
diff --git a/toolchain/check/function.cpp b/toolchain/check/function.cpp
index a546a7605813..8f2f9e1fbe44 100644
--- a/toolchain/check/function.cpp
+++ b/toolchain/check/function.cpp
@@ -185,11 +185,9 @@ auto MakeBuiltinFunction(Context& context, SemIR::LocId loc_id,
               .return_patterns_id = return_patterns_id,
               .self_param_id = self_param_id,
           }});
-  // Add the builtin to the imports block so that it appears in the formatted
-  // IR.
   // TODO: Find a better way to handle this. Ideally we should stop using this
   // function entirely and declare builtins in the prelude.
-  context.imports().push_back(decl_id);
+  context.generated().push_back(decl_id);
 
   auto& function = context.functions().Get(function_id);
   CARBON_CHECK(IsValidBuiltinDeclaration(context, function, builtin_kind));
diff --git a/toolchain/check/testdata/basics/raw_sem_ir/builtins.carbon b/toolchain/check/testdata/basics/raw_sem_ir/builtins.carbon
index 47f00f9a8ae0..aad92fa2abde 100644
--- a/toolchain/check/testdata/basics/raw_sem_ir/builtins.carbon
+++ b/toolchain/check/testdata/basics/raw_sem_ir/builtins.carbon
@@ -83,9 +83,10 @@
 // CHECK:STDOUT:   inst_blocks:
 // CHECK:STDOUT:     inst_block_empty: {}
 // CHECK:STDOUT:     exports:         {}
+// CHECK:STDOUT:     generated:       {}
 // CHECK:STDOUT:     imports:         {}
 // CHECK:STDOUT:     global_init:     {}
-// CHECK:STDOUT:     inst_block60000004:
+// CHECK:STDOUT:     inst_block60000005:
 // CHECK:STDOUT:       0:               instF
 // CHECK:STDOUT:   value_stores:
 // CHECK:STDOUT:     shared_values:
diff --git a/toolchain/check/testdata/basics/raw_sem_ir/cpp_interop.carbon b/toolchain/check/testdata/basics/raw_sem_ir/cpp_interop.carbon
index 4048faa7aee6..6b1f2efaca82 100644
--- a/toolchain/check/testdata/basics/raw_sem_ir/cpp_interop.carbon
+++ b/toolchain/check/testdata/basics/raw_sem_ir/cpp_interop.carbon
@@ -73,13 +73,13 @@ fn G(x: Cpp.X) {
 // CHECK:STDOUT:   cpp_global_vars:
 // CHECK:STDOUT:     cpp_global_var60000000: {key: {entity_name_id: entity_name60000003}, clang_decl_id: clang_decl_id60000007}
 // CHECK:STDOUT:   functions:
-// CHECK:STDOUT:     function60000000: {name: name0, parent_scope: name_scope0, call_param_patterns_id: inst_block60000006, call_params_id: inst_block60000007, body: [inst_block6000000A]}
+// CHECK:STDOUT:     function60000000: {name: name0, parent_scope: name_scope0, call_param_patterns_id: inst_block60000007, call_params_id: inst_block60000008, body: [inst_block6000000B]}
 // CHECK:STDOUT:     function60000001: {name: name3, parent_scope: name_scope60000001, call_param_patterns_id: inst_block_empty, call_params_id: inst_block_empty}
 // CHECK:STDOUT:     function60000002: {name: name6, parent_scope: name_scope60000001, call_param_patterns_id: inst_block_empty, call_params_id: inst_block_empty}
-// CHECK:STDOUT:     function60000003: {name: name3, parent_scope: name_scope60000001, call_param_patterns_id: inst_block6000000E, call_params_id: inst_block6000000F}
-// CHECK:STDOUT:     function60000004: {name: name6, parent_scope: name_scope60000001, call_param_patterns_id: inst_block60000014, call_params_id: inst_block60000015}
+// CHECK:STDOUT:     function60000003: {name: name3, parent_scope: name_scope60000001, call_param_patterns_id: inst_block6000000F, call_params_id: inst_block60000010}
+// CHECK:STDOUT:     function60000004: {name: name6, parent_scope: name_scope60000001, call_param_patterns_id: inst_block60000015, call_params_id: inst_block60000016}
 // CHECK:STDOUT:   classes:
-// CHECK:STDOUT:     class60000000:   {name: name2, parent_scope: name_scope60000001, self_type_id: type(inst60000015), inheritance_kind: Base, is_dynamic: 0, scope_id: name_scope60000002, body_block_id: inst_block6000000B, adapt_id: inst<none>, base_id: inst<none>, complete_type_witness_id: inst60000025, vtable_decl_id: inst<none>}}
+// CHECK:STDOUT:     class60000000:   {name: name2, parent_scope: name_scope60000001, self_type_id: type(inst60000015), inheritance_kind: Base, is_dynamic: 0, scope_id: name_scope60000002, body_block_id: inst_block6000000C, adapt_id: inst<none>, base_id: inst<none>, complete_type_witness_id: inst60000025, vtable_decl_id: inst<none>}}
 // CHECK:STDOUT:   interfaces:      {}
 // CHECK:STDOUT:   associated_constants: {}
 // CHECK:STDOUT:   impls:           {}
@@ -157,8 +157,8 @@ fn G(x: Cpp.X) {
 // CHECK:STDOUT:     inst60000019:    {kind: ValueBindingPattern, arg0: entity_name60000000, type: type(inst60000018)}
 // CHECK:STDOUT:     inst6000001A:    {kind: ValueParamPattern, arg0: inst60000019, arg1: call_param0, type: type(inst60000018)}
 // CHECK:STDOUT:     inst6000001B:    {kind: ValueParam, arg0: call_param0, arg1: name1, type: type(inst60000015)}
-// CHECK:STDOUT:     inst6000001C:    {kind: SpliceBlock, arg0: inst_block60000004, arg1: inst60000016, type: type(TypeType)}
-// CHECK:STDOUT:     inst6000001D:    {kind: FunctionDecl, arg0: function60000000, arg1: inst_block60000009, type: type(inst6000001E)}
+// CHECK:STDOUT:     inst6000001C:    {kind: SpliceBlock, arg0: inst_block60000005, arg1: inst60000016, type: type(TypeType)}
+// CHECK:STDOUT:     inst6000001D:    {kind: FunctionDecl, arg0: function60000000, arg1: inst_block6000000A, type: type(inst6000001E)}
 // CHECK:STDOUT:     inst6000001E:    {kind: FunctionType, arg0: function60000000, arg1: specific<none>, type: type(TypeType)}
 // CHECK:STDOUT:     inst6000001F:    {kind: StructValue, arg0: inst_block_empty, type: type(inst6000001E)}
 // CHECK:STDOUT:     inst60000020:    {kind: PointerType, arg0: inst60000015, type: type(TypeType)}
@@ -188,7 +188,7 @@ fn G(x: Cpp.X) {
 // CHECK:STDOUT:     inst60000038:    {kind: ValueBindingPattern, arg0: entity_name60000001, type: type(inst60000018)}
 // CHECK:STDOUT:     inst60000039:    {kind: ValueParamPattern, arg0: inst60000038, arg1: call_param0, type: type(inst60000018)}
 // CHECK:STDOUT:     inst6000003A:    {kind: ValueParam, arg0: call_param0, arg1: name1, type: type(inst60000015)}
-// CHECK:STDOUT:     inst6000003B:    {kind: FunctionDecl, arg0: function60000003, arg1: inst_block60000011, type: type(inst6000003C)}
+// CHECK:STDOUT:     inst6000003B:    {kind: FunctionDecl, arg0: function60000003, arg1: inst_block60000012, type: type(inst6000003C)}
 // CHECK:STDOUT:     inst6000003C:    {kind: FunctionType, arg0: function60000003, arg1: specific<none>, type: type(TypeType)}
 // CHECK:STDOUT:     inst6000003D:    {kind: StructValue, arg0: inst_block_empty, type: type(inst6000003C)}
 // CHECK:STDOUT:     inst6000003E:    {kind: ValueBinding, arg0: entity_name60000002, arg1: inst60000042, type: type(inst60000020)}
@@ -196,12 +196,12 @@ fn G(x: Cpp.X) {
 // CHECK:STDOUT:     inst60000040:    {kind: ValueBindingPattern, arg0: entity_name60000002, type: type(inst6000003F)}
 // CHECK:STDOUT:     inst60000041:    {kind: ValueParamPattern, arg0: inst60000040, arg1: call_param0, type: type(inst6000003F)}
 // CHECK:STDOUT:     inst60000042:    {kind: ValueParam, arg0: call_param0, arg1: name1, type: type(inst60000020)}
-// CHECK:STDOUT:     inst60000043:    {kind: FunctionDecl, arg0: function60000004, arg1: inst_block60000017, type: type(inst60000044)}
+// CHECK:STDOUT:     inst60000043:    {kind: FunctionDecl, arg0: function60000004, arg1: inst_block60000018, type: type(inst60000044)}
 // CHECK:STDOUT:     inst60000044:    {kind: FunctionType, arg0: function60000004, arg1: specific<none>, type: type(TypeType)}
 // CHECK:STDOUT:     inst60000045:    {kind: StructValue, arg0: inst_block_empty, type: type(inst60000044)}
 // CHECK:STDOUT:     inst60000046:    {kind: ValueAsRef, arg0: inst60000036, type: type(inst60000015)}
 // CHECK:STDOUT:     inst60000047:    {kind: AddrOf, arg0: inst60000046, type: type(inst60000020)}
-// CHECK:STDOUT:     inst60000048:    {kind: Call, arg0: inst60000043, arg1: inst_block60000019, type: type(inst60000013)}
+// CHECK:STDOUT:     inst60000048:    {kind: Call, arg0: inst60000043, arg1: inst_block6000001A, type: type(inst60000013)}
 // CHECK:STDOUT:     inst60000049:    {kind: NameRef, arg0: name(Cpp), arg1: inst60000011, type: type(inst(NamespaceType))}
 // CHECK:STDOUT:     inst6000004A:    {kind: NameRef, arg0: name3, arg1: inst6000002A, type: type(inst60000029)}
 // CHECK:STDOUT:     inst6000004B:    {kind: NameRef, arg0: name(Cpp), arg1: inst60000011, type: type(inst(NamespaceType))}
@@ -214,7 +214,7 @@ fn G(x: Cpp.X) {
 // CHECK:STDOUT:     inst60000052:    {kind: AcquireValue, arg0: inst60000051, type: type(inst60000015)}
 // CHECK:STDOUT:     inst60000053:    {kind: ValueAsRef, arg0: inst60000052, type: type(inst60000015)}
 // CHECK:STDOUT:     inst60000054:    {kind: AddrOf, arg0: inst60000053, type: type(inst60000020)}
-// CHECK:STDOUT:     inst60000055:    {kind: Call, arg0: inst60000043, arg1: inst_block6000001B, type: type(inst60000013)}
+// CHECK:STDOUT:     inst60000055:    {kind: Call, arg0: inst60000043, arg1: inst_block6000001C, type: type(inst60000013)}
 // CHECK:STDOUT:     inst60000056:    {kind: Return}
 // CHECK:STDOUT:   constant_values:
 // CHECK:STDOUT:     values:
@@ -291,6 +291,7 @@ fn G(x: Cpp.X) {
 // CHECK:STDOUT:     inst_block_empty: {}
 // CHECK:STDOUT:     exports:
 // CHECK:STDOUT:       0:               inst6000001D
+// CHECK:STDOUT:     generated:       {}
 // CHECK:STDOUT:     imports:
 // CHECK:STDOUT:       0:               inst60000011
 // CHECK:STDOUT:       1:               inst60000014
@@ -303,23 +304,23 @@ fn G(x: Cpp.X) {
 // CHECK:STDOUT:       8:               inst6000004D
 // CHECK:STDOUT:       9:               inst6000004E
 // CHECK:STDOUT:     global_init:     {}
-// CHECK:STDOUT:     inst_block60000004:
+// CHECK:STDOUT:     inst_block60000005:
 // CHECK:STDOUT:       0:               inst60000012
 // CHECK:STDOUT:       1:               inst60000016
-// CHECK:STDOUT:     inst_block60000005:
-// CHECK:STDOUT:       0:               inst6000001A
 // CHECK:STDOUT:     inst_block60000006:
 // CHECK:STDOUT:       0:               inst6000001A
 // CHECK:STDOUT:     inst_block60000007:
-// CHECK:STDOUT:       0:               inst6000001B
+// CHECK:STDOUT:       0:               inst6000001A
 // CHECK:STDOUT:     inst_block60000008:
+// CHECK:STDOUT:       0:               inst6000001B
+// CHECK:STDOUT:     inst_block60000009:
 // CHECK:STDOUT:       0:               inst60000019
 // CHECK:STDOUT:       1:               inst6000001A
-// CHECK:STDOUT:     inst_block60000009:
+// CHECK:STDOUT:     inst_block6000000A:
 // CHECK:STDOUT:       0:               inst6000001B
 // CHECK:STDOUT:       1:               inst6000001C
 // CHECK:STDOUT:       2:               inst60000017
-// CHECK:STDOUT:     inst_block6000000A:
+// CHECK:STDOUT:     inst_block6000000B:
 // CHECK:STDOUT:       0:               inst60000028
 // CHECK:STDOUT:       1:               inst6000002C
 // CHECK:STDOUT:       2:               inst60000033
@@ -340,45 +341,45 @@ fn G(x: Cpp.X) {
 // CHECK:STDOUT:       17:              inst60000054
 // CHECK:STDOUT:       18:              inst60000055
 // CHECK:STDOUT:       19:              inst60000056
-// CHECK:STDOUT:     inst_block6000000B:
+// CHECK:STDOUT:     inst_block6000000C:
 // CHECK:STDOUT:       0:               inst60000022
 // CHECK:STDOUT:       1:               inst60000023
 // CHECK:STDOUT:       2:               inst60000025
-// CHECK:STDOUT:     inst_block6000000C: {}
-// CHECK:STDOUT:     inst_block6000000D:
-// CHECK:STDOUT:       0:               inst60000039
+// CHECK:STDOUT:     inst_block6000000D: {}
 // CHECK:STDOUT:     inst_block6000000E:
 // CHECK:STDOUT:       0:               inst60000039
 // CHECK:STDOUT:     inst_block6000000F:
-// CHECK:STDOUT:       0:               inst6000003A
+// CHECK:STDOUT:       0:               inst60000039
 // CHECK:STDOUT:     inst_block60000010:
+// CHECK:STDOUT:       0:               inst6000003A
+// CHECK:STDOUT:     inst_block60000011:
 // CHECK:STDOUT:       0:               inst60000038
 // CHECK:STDOUT:       1:               inst60000039
-// CHECK:STDOUT:     inst_block60000011:
+// CHECK:STDOUT:     inst_block60000012:
 // CHECK:STDOUT:       0:               inst6000003A
 // CHECK:STDOUT:       1:               inst60000037
-// CHECK:STDOUT:     inst_block60000012: {}
-// CHECK:STDOUT:     inst_block60000013:
-// CHECK:STDOUT:       0:               inst60000041
+// CHECK:STDOUT:     inst_block60000013: {}
 // CHECK:STDOUT:     inst_block60000014:
 // CHECK:STDOUT:       0:               inst60000041
 // CHECK:STDOUT:     inst_block60000015:
-// CHECK:STDOUT:       0:               inst60000042
+// CHECK:STDOUT:       0:               inst60000041
 // CHECK:STDOUT:     inst_block60000016:
+// CHECK:STDOUT:       0:               inst60000042
+// CHECK:STDOUT:     inst_block60000017:
 // CHECK:STDOUT:       0:               inst60000040
 // CHECK:STDOUT:       1:               inst60000041
-// CHECK:STDOUT:     inst_block60000017:
+// CHECK:STDOUT:     inst_block60000018:
 // CHECK:STDOUT:       0:               inst60000042
 // CHECK:STDOUT:       1:               inst6000003E
-// CHECK:STDOUT:     inst_block60000018:
-// CHECK:STDOUT:       0:               inst60000036
 // CHECK:STDOUT:     inst_block60000019:
-// CHECK:STDOUT:       0:               inst60000047
+// CHECK:STDOUT:       0:               inst60000036
 // CHECK:STDOUT:     inst_block6000001A:
-// CHECK:STDOUT:       0:               inst60000052
+// CHECK:STDOUT:       0:               inst60000047
 // CHECK:STDOUT:     inst_block6000001B:
-// CHECK:STDOUT:       0:               inst60000054
+// CHECK:STDOUT:       0:               inst60000052
 // CHECK:STDOUT:     inst_block6000001C:
+// CHECK:STDOUT:       0:               inst60000054
+// CHECK:STDOUT:     inst_block6000001D:
 // CHECK:STDOUT:       0:               instF
 // CHECK:STDOUT:       1:               inst60000010
 // CHECK:STDOUT:       2:               inst6000001D
diff --git a/toolchain/check/testdata/basics/raw_sem_ir/multifile.carbon b/toolchain/check/testdata/basics/raw_sem_ir/multifile.carbon
index 2fa3ece1df72..25eb486c8f31 100644
--- a/toolchain/check/testdata/basics/raw_sem_ir/multifile.carbon
+++ b/toolchain/check/testdata/basics/raw_sem_ir/multifile.carbon
@@ -42,7 +42,7 @@ fn B() {
 // CHECK:STDOUT:   entity_names:    {}
 // CHECK:STDOUT:   cpp_global_vars: {}
 // CHECK:STDOUT:   functions:
-// CHECK:STDOUT:     function60000000: {name: name0, parent_scope: name_scope0, call_param_patterns_id: inst_block_empty, call_params_id: inst_block_empty, body: [inst_block60000005]}
+// CHECK:STDOUT:     function60000000: {name: name0, parent_scope: name_scope0, call_param_patterns_id: inst_block_empty, call_params_id: inst_block_empty, body: [inst_block60000006]}
 // CHECK:STDOUT:   classes:         {}
 // CHECK:STDOUT:   interfaces:      {}
 // CHECK:STDOUT:   associated_constants: {}
@@ -85,12 +85,13 @@ fn B() {
 // CHECK:STDOUT:     inst_block_empty: {}
 // CHECK:STDOUT:     exports:
 // CHECK:STDOUT:       0:               inst60000010
+// CHECK:STDOUT:     generated:       {}
 // CHECK:STDOUT:     imports:         {}
 // CHECK:STDOUT:     global_init:     {}
-// CHECK:STDOUT:     inst_block60000004: {}
-// CHECK:STDOUT:     inst_block60000005:
-// CHECK:STDOUT:       0:               inst60000014
+// CHECK:STDOUT:     inst_block60000005: {}
 // CHECK:STDOUT:     inst_block60000006:
+// CHECK:STDOUT:       0:               inst60000014
+// CHECK:STDOUT:     inst_block60000007:
 // CHECK:STDOUT:       0:               instF
 // CHECK:STDOUT:       1:               inst60000010
 // CHECK:STDOUT:   value_stores:
@@ -123,7 +124,7 @@ fn B() {
 // CHECK:STDOUT:     entity_name50000000: {name: name1, parent_scope: name_scope50000001, index: -1, is_template: 0, is_unused: 0}
 // CHECK:STDOUT:   cpp_global_vars: {}
 // CHECK:STDOUT:   functions:
-// CHECK:STDOUT:     function50000000: {name: name0, parent_scope: name_scope0, call_param_patterns_id: inst_block_empty, call_params_id: inst_block_empty, body: [inst_block50000005]}
+// CHECK:STDOUT:     function50000000: {name: name0, parent_scope: name_scope0, call_param_patterns_id: inst_block_empty, call_params_id: inst_block_empty, body: [inst_block50000006]}
 // CHECK:STDOUT:     function50000001: {name: name1, parent_scope: name_scope50000001, call_param_patterns_id: inst_block_empty}
 // CHECK:STDOUT:   classes:         {}
 // CHECK:STDOUT:   interfaces:      {}
@@ -185,18 +186,19 @@ fn B() {
 // CHECK:STDOUT:     inst_block_empty: {}
 // CHECK:STDOUT:     exports:
 // CHECK:STDOUT:       0:               inst50000012
+// CHECK:STDOUT:     generated:       {}
 // CHECK:STDOUT:     imports:
 // CHECK:STDOUT:       0:               inst50000011
 // CHECK:STDOUT:       1:               inst50000017
 // CHECK:STDOUT:       2:               inst50000018
 // CHECK:STDOUT:     global_init:     {}
-// CHECK:STDOUT:     inst_block50000004: {}
-// CHECK:STDOUT:     inst_block50000005:
+// CHECK:STDOUT:     inst_block50000005: {}
+// CHECK:STDOUT:     inst_block50000006:
 // CHECK:STDOUT:       0:               inst50000016
 // CHECK:STDOUT:       1:               inst5000001B
 // CHECK:STDOUT:       2:               inst5000001C
 // CHECK:STDOUT:       3:               inst5000001D
-// CHECK:STDOUT:     inst_block50000006:
+// CHECK:STDOUT:     inst_block50000007:
 // CHECK:STDOUT:       0:               instF
 // CHECK:STDOUT:       1:               inst50000010
 // CHECK:STDOUT:       2:               inst50000012
diff --git a/toolchain/check/testdata/basics/raw_sem_ir/multifile_with_textual_ir.carbon b/toolchain/check/testdata/basics/raw_sem_ir/multifile_with_textual_ir.carbon
index 5de105dd84d9..98a8d6003e40 100644
--- a/toolchain/check/testdata/basics/raw_sem_ir/multifile_with_textual_ir.carbon
+++ b/toolchain/check/testdata/basics/raw_sem_ir/multifile_with_textual_ir.carbon
@@ -42,7 +42,7 @@ fn B() {
 // CHECK:STDOUT:   entity_names:    {}
 // CHECK:STDOUT:   cpp_global_vars: {}
 // CHECK:STDOUT:   functions:
-// CHECK:STDOUT:     function60000000: {name: name0, parent_scope: name_scope0, call_param_patterns_id: inst_block_empty, call_params_id: inst_block_empty, body: [inst_block60000005]}
+// CHECK:STDOUT:     function60000000: {name: name0, parent_scope: name_scope0, call_param_patterns_id: inst_block_empty, call_params_id: inst_block_empty, body: [inst_block60000006]}
 // CHECK:STDOUT:   classes:         {}
 // CHECK:STDOUT:   interfaces:      {}
 // CHECK:STDOUT:   associated_constants: {}
@@ -85,12 +85,13 @@ fn B() {
 // CHECK:STDOUT:     inst_block_empty: {}
 // CHECK:STDOUT:     exports:
 // CHECK:STDOUT:       0:               inst60000010
+// CHECK:STDOUT:     generated:       {}
 // CHECK:STDOUT:     imports:         {}
 // CHECK:STDOUT:     global_init:     {}
-// CHECK:STDOUT:     inst_block60000004: {}
-// CHECK:STDOUT:     inst_block60000005:
-// CHECK:STDOUT:       0:               inst60000014
+// CHECK:STDOUT:     inst_block60000005: {}
 // CHECK:STDOUT:     inst_block60000006:
+// CHECK:STDOUT:       0:               inst60000014
+// CHECK:STDOUT:     inst_block60000007:
 // CHECK:STDOUT:       0:               instF
 // CHECK:STDOUT:       1:               inst60000010
 // CHECK:STDOUT:   value_stores:
@@ -142,7 +143,7 @@ fn B() {
 // CHECK:STDOUT:     entity_name50000000: {name: name1, parent_scope: name_scope50000001, index: -1, is_template: 0, is_unused: 0}
 // CHECK:STDOUT:   cpp_global_vars: {}
 // CHECK:STDOUT:   functions:
-// CHECK:STDOUT:     function50000000: {name: name0, parent_scope: name_scope0, call_param_patterns_id: inst_block_empty, call_params_id: inst_block_empty, body: [inst_block50000005]}
+// CHECK:STDOUT:     function50000000: {name: name0, parent_scope: name_scope0, call_param_patterns_id: inst_block_empty, call_params_id: inst_block_empty, body: [inst_block50000006]}
 // CHECK:STDOUT:     function50000001: {name: name1, parent_scope: name_scope50000001, call_param_patterns_id: inst_block_empty}
 // CHECK:STDOUT:   classes:         {}
 // CHECK:STDOUT:   interfaces:      {}
@@ -204,18 +205,19 @@ fn B() {
 // CHECK:STDOUT:     inst_block_empty: {}
 // CHECK:STDOUT:     exports:
 // CHECK:STDOUT:       0:               inst50000012
+// CHECK:STDOUT:     generated:       {}
 // CHECK:STDOUT:     imports:
 // CHECK:STDOUT:       0:               inst50000011
 // CHECK:STDOUT:       1:               inst50000017
 // CHECK:STDOUT:       2:               inst50000018
 // CHECK:STDOUT:     global_init:     {}
-// CHECK:STDOUT:     inst_block50000004: {}
-// CHECK:STDOUT:     inst_block50000005:
+// CHECK:STDOUT:     inst_block50000005: {}
+// CHECK:STDOUT:     inst_block50000006:
 // CHECK:STDOUT:       0:               inst50000016
 // CHECK:STDOUT:       1:               inst5000001B
 // CHECK:STDOUT:       2:               inst5000001C
 // CHECK:STDOUT:       3:               inst5000001D
-// CHECK:STDOUT:     inst_block50000006:
+// CHECK:STDOUT:     inst_block50000007:
 // CHECK:STDOUT:       0:               instF
 // CHECK:STDOUT:       1:               inst50000010
 // CHECK:STDOUT:       2:               inst50000012
diff --git a/toolchain/check/testdata/basics/raw_sem_ir/one_file.carbon b/toolchain/check/testdata/basics/raw_sem_ir/one_file.carbon
index c043cef98cac..2277ef23d39d 100644
--- a/toolchain/check/testdata/basics/raw_sem_ir/one_file.carbon
+++ b/toolchain/check/testdata/basics/raw_sem_ir/one_file.carbon
@@ -336,12 +336,12 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:     entity_name6000003F: {name: name1, parent_scope: name_scope<none>, index: 0, is_template: 0, is_unused: 0}
 // CHECK:STDOUT:   cpp_global_vars: {}
 // CHECK:STDOUT:   functions:
-// CHECK:STDOUT:     function60000000: {name: name0, parent_scope: name_scope0, call_param_patterns_id: inst_block60000010, call_params_id: inst_block60000011, return_type_inst_id: inst6000002F, return_form_inst_id: inst60000031, return_patterns_id: inst_block6000000F, body: [inst_block60000018]}
-// CHECK:STDOUT:     function60000001: {name: name4, parent_scope: name_scope60000003, call_param_patterns_id: inst_block6000001E, return_type_inst_id: inst6000005E, return_form_inst_id: inst6000005F, return_patterns_id: inst_block60000020}
-// CHECK:STDOUT:     function60000002: {name: name4, parent_scope: name_scope60000004, call_param_patterns_id: inst_block6000002A, return_type_inst_id: inst6000007E, return_form_inst_id: inst6000007F, return_patterns_id: inst_block6000002C}
-// CHECK:STDOUT:     function60000003: {name: name4, parent_scope: name_scope60000009, call_param_patterns_id: inst_block60000041, return_type_inst_id: inst600000C6, return_form_inst_id: inst600000C7, return_patterns_id: inst_block60000043}
-// CHECK:STDOUT:     function60000004: {name: name4, parent_scope: name_scope6000000C, call_param_patterns_id: inst_block6000004F, return_type_inst_id: inst600000EB, return_form_inst_id: inst600000EC, return_patterns_id: inst_block60000051}
-// CHECK:STDOUT:     function60000005: {name: name4, parent_scope: name_scope6000000D, call_param_patterns_id: inst_block6000006C, return_type_inst_id: inst6000012F, return_form_inst_id: inst60000130, return_patterns_id: inst_block6000006E}
+// CHECK:STDOUT:     function60000000: {name: name0, parent_scope: name_scope0, call_param_patterns_id: inst_block60000011, call_params_id: inst_block60000012, return_type_inst_id: inst6000002F, return_form_inst_id: inst60000031, return_patterns_id: inst_block60000010, body: [inst_block60000019]}
+// CHECK:STDOUT:     function60000001: {name: name4, parent_scope: name_scope60000003, call_param_patterns_id: inst_block6000001F, return_type_inst_id: inst6000005E, return_form_inst_id: inst6000005F, return_patterns_id: inst_block60000021}
+// CHECK:STDOUT:     function60000002: {name: name4, parent_scope: name_scope60000004, call_param_patterns_id: inst_block6000002B, return_type_inst_id: inst6000007E, return_form_inst_id: inst6000007F, return_patterns_id: inst_block6000002D}
+// CHECK:STDOUT:     function60000003: {name: name4, parent_scope: name_scope60000009, call_param_patterns_id: inst_block60000042, return_type_inst_id: inst600000C6, return_form_inst_id: inst600000C7, return_patterns_id: inst_block60000044}
+// CHECK:STDOUT:     function60000004: {name: name4, parent_scope: name_scope6000000C, call_param_patterns_id: inst_block60000050, return_type_inst_id: inst600000EB, return_form_inst_id: inst600000EC, return_patterns_id: inst_block60000052}
+// CHECK:STDOUT:     function60000005: {name: name4, parent_scope: name_scope6000000D, call_param_patterns_id: inst_block6000006D, return_type_inst_id: inst6000012F, return_form_inst_id: inst60000130, return_patterns_id: inst_block6000006F}
 // CHECK:STDOUT:   classes:         {}
 // CHECK:STDOUT:   interfaces:
 // CHECK:STDOUT:     interface60000000: {name: name3, parent_scope: name_scope60000001, require_impls_block_id: require_block_empty}
@@ -358,57 +358,57 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:     impl60000008:    {self: inst6000010F, constraint: inst60000110, witness: inst600000D8}
 // CHECK:STDOUT:     impl60000009:    {self: inst6000015D, constraint: inst6000015E, witness: inst6000011C}
 // CHECK:STDOUT:   generics:
-// CHECK:STDOUT:     generic60000000: {decl: inst6000003C, bindings: inst_block60000014, self_specific_id: specific60000000, decl_block_id: inst_block60000016, definition_block_id: inst_block60000090}
-// CHECK:STDOUT:     generic60000001: {decl: inst6000004F, bindings: inst_block6000001B, self_specific_id: specific60000001, decl_block_id: inst_block_empty, definition_block_id: inst_block60000025}
-// CHECK:STDOUT:     generic60000002: {decl: inst60000054, bindings: inst_block60000021, self_specific_id: specific60000002, decl_block_id: inst_block60000022, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     generic60000003: {decl: inst6000006E, bindings: inst_block60000036, self_specific_id: specific60000004, decl_block_id: inst_block60000038, definition_block_id: inst_block6000003A}
-// CHECK:STDOUT:     generic60000004: {decl: inst60000075, bindings: inst_block6000002D, self_specific_id: specific60000007, decl_block_id: inst_block6000002E, definition_block_id: inst_block60000033}
-// CHECK:STDOUT:     generic60000005: {decl: inst600000B3, bindings: inst_block6000003E, self_specific_id: specific6000000B, decl_block_id: inst_block60000040, definition_block_id: inst_block60000048}
-// CHECK:STDOUT:     generic60000006: {decl: inst600000BE, bindings: inst_block60000044, self_specific_id: specific6000000D, decl_block_id: inst_block60000045, definition_block_id: inst_block_empty}
-// CHECK:STDOUT:     generic60000007: {decl: inst600000D9, bindings: inst_block6000005F, self_specific_id: specific6000000E, decl_block_id: inst_block60000063, definition_block_id: inst_block60000065}
-// CHECK:STDOUT:     generic60000008: {decl: inst600000E0, bindings: inst_block60000052, self_specific_id: specific60000011, decl_block_id: inst_block60000054, definition_block_id: inst_block6000005C}
-// CHECK:STDOUT:     generic60000009: {decl: inst6000011D, bindings: inst_block6000007E, self_specific_id: specific60000017, decl_block_id: inst_block60000082, definition_block_id: inst_block60000084}
-// CHECK:STDOUT:     generic6000000A: {decl: inst60000124, bindings: inst_block6000006F, self_specific_id: specific6000001A, decl_block_id: inst_block60000071, definition_block_id: inst_block6000007B}
+// CHECK:STDOUT:     generic60000000: {decl: inst6000003C, bindings: inst_block60000015, self_specific_id: specific60000000, decl_block_id: inst_block60000017, definition_block_id: inst_block60000091}
+// CHECK:STDOUT:     generic60000001: {decl: inst6000004F, bindings: inst_block6000001C, self_specific_id: specific60000001, decl_block_id: inst_block_empty, definition_block_id: inst_block60000026}
+// CHECK:STDOUT:     generic60000002: {decl: inst60000054, bindings: inst_block60000022, self_specific_id: specific60000002, decl_block_id: inst_block60000023, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     generic60000003: {decl: inst6000006E, bindings: inst_block60000037, self_specific_id: specific60000004, decl_block_id: inst_block60000039, definition_block_id: inst_block6000003B}
+// CHECK:STDOUT:     generic60000004: {decl: inst60000075, bindings: inst_block6000002E, self_specific_id: specific60000007, decl_block_id: inst_block6000002F, definition_block_id: inst_block60000034}
+// CHECK:STDOUT:     generic60000005: {decl: inst600000B3, bindings: inst_block6000003F, self_specific_id: specific6000000B, decl_block_id: inst_block60000041, definition_block_id: inst_block60000049}
+// CHECK:STDOUT:     generic60000006: {decl: inst600000BE, bindings: inst_block60000045, self_specific_id: specific6000000D, decl_block_id: inst_block60000046, definition_block_id: inst_block_empty}
+// CHECK:STDOUT:     generic60000007: {decl: inst600000D9, bindings: inst_block60000060, self_specific_id: specific6000000E, decl_block_id: inst_block60000064, definition_block_id: inst_block60000066}
+// CHECK:STDOUT:     generic60000008: {decl: inst600000E0, bindings: inst_block60000053, self_specific_id: specific60000011, decl_block_id: inst_block60000055, definition_block_id: inst_block6000005D}
+// CHECK:STDOUT:     generic60000009: {decl: inst6000011D, bindings: inst_block6000007F, self_specific_id: specific60000017, decl_block_id: inst_block60000083, definition_block_id: inst_block60000085}
+// CHECK:STDOUT:     generic6000000A: {decl: inst60000124, bindings: inst_block60000070, self_specific_id: specific6000001A, decl_block_id: inst_block60000072, definition_block_id: inst_block6000007C}
 // CHECK:STDOUT:   specifics:
-// CHECK:STDOUT:     specific60000000: {generic: generic60000000, args: inst_block60000015, decl_block_id: inst_block60000017, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific60000001: {generic: generic60000001, args: inst_block6000001C, decl_block_id: inst_block_empty, definition_block_id: inst_block6000001D}
-// CHECK:STDOUT:     specific60000002: {generic: generic60000002, args: inst_block6000001C, decl_block_id: inst_block60000023, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific60000003: {generic: generic60000001, args: inst_block60000024, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific60000004: {generic: generic60000003, args: inst_block60000027, decl_block_id: inst_block60000028, definition_block_id: inst_block60000029}
-// CHECK:STDOUT:     specific60000005: {generic: generic60000001, args: inst_block60000027, decl_block_id: inst_block_empty, definition_block_id: inst_block6000002F}
-// CHECK:STDOUT:     specific60000006: {generic: generic60000002, args: inst_block60000027, decl_block_id: inst_block60000030, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific60000007: {generic: generic60000004, args: inst_block60000027, decl_block_id: inst_block60000034, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific60000008: {generic: generic60000001, args: inst_block60000031, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific60000009: {generic: generic60000002, args: inst_block60000031, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific6000000A: {generic: generic60000003, args: inst_block60000037, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific6000000B: {generic: generic60000005, args: inst_block60000015, decl_block_id: inst_block6000003C, definition_block_id: inst_block60000085}
-// CHECK:STDOUT:     specific6000000C: {generic: generic60000005, args: inst_block6000003F, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific6000000D: {generic: generic60000006, args: inst_block60000015, decl_block_id: inst_block60000046, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific6000000E: {generic: generic60000007, args: inst_block6000004B, decl_block_id: inst_block6000004D, definition_block_id: inst_block6000004E}
-// CHECK:STDOUT:     specific6000000F: {generic: generic60000001, args: inst_block60000055, decl_block_id: inst_block_empty, definition_block_id: inst_block60000056}
-// CHECK:STDOUT:     specific60000010: {generic: generic60000002, args: inst_block60000055, decl_block_id: inst_block60000057, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific60000011: {generic: generic60000008, args: inst_block6000004B, decl_block_id: inst_block6000005D, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific60000012: {generic: generic60000001, args: inst_block60000058, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific60000013: {generic: generic60000002, args: inst_block60000058, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific60000014: {generic: generic60000001, args: inst_block6000005A, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific60000015: {generic: generic60000002, args: inst_block6000005A, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific60000016: {generic: generic60000007, args: inst_block60000060, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific60000017: {generic: generic60000009, args: inst_block60000068, decl_block_id: inst_block6000006A, definition_block_id: inst_block6000006B}
-// CHECK:STDOUT:     specific60000018: {generic: generic60000001, args: inst_block60000072, decl_block_id: inst_block_empty, definition_block_id: inst_block60000073}
-// CHECK:STDOUT:     specific60000019: {generic: generic60000002, args: inst_block60000072, decl_block_id: inst_block60000074, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific6000001A: {generic: generic6000000A, args: inst_block60000068, decl_block_id: inst_block6000007C, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific6000001B: {generic: generic60000001, args: inst_block60000075, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific6000001C: {generic: generic60000002, args: inst_block60000075, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific6000001D: {generic: generic60000001, args: inst_block60000077, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific6000001E: {generic: generic60000002, args: inst_block60000077, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific6000001F: {generic: generic60000001, args: inst_block60000079, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific60000020: {generic: generic60000002, args: inst_block60000079, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific60000021: {generic: generic60000009, args: inst_block6000007F, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific60000022: {generic: generic60000005, args: inst_block60000086, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific60000023: {generic: generic60000001, args: inst_block60000088, decl_block_id: inst_block_empty, definition_block_id: inst_block60000089}
-// CHECK:STDOUT:     specific60000024: {generic: generic60000001, args: inst_block6000008B, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific60000025: {generic: generic60000002, args: inst_block60000088, decl_block_id: inst_block6000008C, definition_block_id: inst_block<none>}
-// CHECK:STDOUT:     specific60000026: {generic: generic60000002, args: inst_block6000008B, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000000: {generic: generic60000000, args: inst_block60000016, decl_block_id: inst_block60000018, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000001: {generic: generic60000001, args: inst_block6000001D, decl_block_id: inst_block_empty, definition_block_id: inst_block6000001E}
+// CHECK:STDOUT:     specific60000002: {generic: generic60000002, args: inst_block6000001D, decl_block_id: inst_block60000024, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000003: {generic: generic60000001, args: inst_block60000025, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000004: {generic: generic60000003, args: inst_block60000028, decl_block_id: inst_block60000029, definition_block_id: inst_block6000002A}
+// CHECK:STDOUT:     specific60000005: {generic: generic60000001, args: inst_block60000028, decl_block_id: inst_block_empty, definition_block_id: inst_block60000030}
+// CHECK:STDOUT:     specific60000006: {generic: generic60000002, args: inst_block60000028, decl_block_id: inst_block60000031, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000007: {generic: generic60000004, args: inst_block60000028, decl_block_id: inst_block60000035, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000008: {generic: generic60000001, args: inst_block60000032, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000009: {generic: generic60000002, args: inst_block60000032, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific6000000A: {generic: generic60000003, args: inst_block60000038, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific6000000B: {generic: generic60000005, args: inst_block60000016, decl_block_id: inst_block6000003D, definition_block_id: inst_block60000086}
+// CHECK:STDOUT:     specific6000000C: {generic: generic60000005, args: inst_block60000040, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific6000000D: {generic: generic60000006, args: inst_block60000016, decl_block_id: inst_block60000047, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific6000000E: {generic: generic60000007, args: inst_block6000004C, decl_block_id: inst_block6000004E, definition_block_id: inst_block6000004F}
+// CHECK:STDOUT:     specific6000000F: {generic: generic60000001, args: inst_block60000056, decl_block_id: inst_block_empty, definition_block_id: inst_block60000057}
+// CHECK:STDOUT:     specific60000010: {generic: generic60000002, args: inst_block60000056, decl_block_id: inst_block60000058, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000011: {generic: generic60000008, args: inst_block6000004C, decl_block_id: inst_block6000005E, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000012: {generic: generic60000001, args: inst_block60000059, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000013: {generic: generic60000002, args: inst_block60000059, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000014: {generic: generic60000001, args: inst_block6000005B, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000015: {generic: generic60000002, args: inst_block6000005B, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000016: {generic: generic60000007, args: inst_block60000061, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000017: {generic: generic60000009, args: inst_block60000069, decl_block_id: inst_block6000006B, definition_block_id: inst_block6000006C}
+// CHECK:STDOUT:     specific60000018: {generic: generic60000001, args: inst_block60000073, decl_block_id: inst_block_empty, definition_block_id: inst_block60000074}
+// CHECK:STDOUT:     specific60000019: {generic: generic60000002, args: inst_block60000073, decl_block_id: inst_block60000075, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific6000001A: {generic: generic6000000A, args: inst_block60000069, decl_block_id: inst_block6000007D, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific6000001B: {generic: generic60000001, args: inst_block60000076, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific6000001C: {generic: generic60000002, args: inst_block60000076, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific6000001D: {generic: generic60000001, args: inst_block60000078, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific6000001E: {generic: generic60000002, args: inst_block60000078, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific6000001F: {generic: generic60000001, args: inst_block6000007A, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000020: {generic: generic60000002, args: inst_block6000007A, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000021: {generic: generic60000009, args: inst_block60000080, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000022: {generic: generic60000005, args: inst_block60000087, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000023: {generic: generic60000001, args: inst_block60000089, decl_block_id: inst_block_empty, definition_block_id: inst_block6000008A}
+// CHECK:STDOUT:     specific60000024: {generic: generic60000001, args: inst_block6000008C, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000025: {generic: generic60000002, args: inst_block60000089, decl_block_id: inst_block6000008D, definition_block_id: inst_block<none>}
+// CHECK:STDOUT:     specific60000026: {generic: generic60000002, args: inst_block6000008C, decl_block_id: inst_block<none>, definition_block_id: inst_block<none>}
 // CHECK:STDOUT:   specific_interfaces:
 // CHECK:STDOUT:     specific_interface60000000: {interface_id: interface60000000, specific_id: specific<none>}
 // CHECK:STDOUT:   struct_type_fields:
@@ -485,15 +485,15 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:     inst60000025:    {kind: TupleType, arg0: inst_block_empty, type: type(TypeType)}
 // CHECK:STDOUT:     inst60000026:    {kind: TupleLiteral, arg0: inst_block_empty, type: type(inst60000025)}
 // CHECK:STDOUT:     inst60000027:    {kind: TupleValue, arg0: inst_block_empty, type: type(inst60000025)}
-// CHECK:STDOUT:     inst60000028:    {kind: TupleType, arg0: inst_block60000009, type: type(TypeType)}
-// CHECK:STDOUT:     inst60000029:    {kind: TupleLiteral, arg0: inst_block60000008, type: type(inst60000028)}
-// CHECK:STDOUT:     inst6000002A:    {kind: TupleValue, arg0: inst_block6000000A, type: type(inst60000028)}
-// CHECK:STDOUT:     inst6000002B:    {kind: TupleValue, arg0: inst_block6000000B, type: type(inst60000028)}
+// CHECK:STDOUT:     inst60000028:    {kind: TupleType, arg0: inst_block6000000A, type: type(TypeType)}
+// CHECK:STDOUT:     inst60000029:    {kind: TupleLiteral, arg0: inst_block60000009, type: type(inst60000028)}
+// CHECK:STDOUT:     inst6000002A:    {kind: TupleValue, arg0: inst_block6000000B, type: type(inst60000028)}
+// CHECK:STDOUT:     inst6000002B:    {kind: TupleValue, arg0: inst_block6000000C, type: type(inst60000028)}
 // CHECK:STDOUT:     inst6000002C:    {kind: PointerType, arg0: inst60000028, type: type(TypeType)}
 // CHECK:STDOUT:     inst6000002D:    {kind: Converted, arg0: inst60000027, arg1: inst60000025, type: type(TypeType)}
-// CHECK:STDOUT:     inst6000002E:    {kind: TupleType, arg0: inst_block6000000D, type: type(TypeType)}
+// CHECK:STDOUT:     inst6000002E:    {kind: TupleType, arg0: inst_block6000000E, type: type(TypeType)}
 // CHECK:STDOUT:     inst6000002F:    {kind: Converted, arg0: inst60000029, arg1: inst6000002E, type: type(TypeType)}
-// CHECK:STDOUT:     inst60000030:    {kind: TupleType, arg0: inst_block6000000E, type: type(TypeType)}
+// CHECK:STDOUT:     inst60000030:    {kind: TupleType, arg0: inst_block6000000F, type: type(TypeType)}
 // CHECK:STDOUT:     inst60000031:    {kind: InitForm, arg0: inst6000002F, arg1: call_param1, type: type(inst(FormType))}
 // CHECK:STDOUT:     inst60000032:    {kind: InitForm, arg0: inst6000002E, arg1: call_param1, type: type(inst(FormType))}
 // CHECK:STDOUT:     inst60000033:    {kind: InitForm, arg0: inst60000030, arg1: call_param1, type: type(inst(FormType))}
@@ -502,10 +502,10 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:     inst60000036:    {kind: PatternType, arg0: inst60000030, type: type(TypeType)}
 // CHECK:STDOUT:     inst60000037:    {kind: OutParamPattern, arg0: inst60000035, arg1: call_param1, type: type(symbolic_constant6000000E)}
 // CHECK:STDOUT:     inst60000038:    {kind: ValueParam, arg0: call_param0, arg1: name2, type: type(symbolic_constant60000004)}
-// CHECK:STDOUT:     inst60000039:    {kind: SpliceBlock, arg0: inst_block60000006, arg1: inst6000001B, type: type(TypeType)}
+// CHECK:STDOUT:     inst60000039:    {kind: SpliceBlock, arg0: inst_block60000007, arg1: inst6000001B, type: type(TypeType)}
 // CHECK:STDOUT:     inst6000003A:    {kind: OutParam, arg0: call_param1, arg1: name(ReturnSlot), type: type(symbolic_constant6000000A)}
 // CHECK:STDOUT:     inst6000003B:    {kind: ReturnSlot, arg0: inst6000002E, arg1: inst6000003A, type: type(symbolic_constant6000000A)}
-// CHECK:STDOUT:     inst6000003C:    {kind: FunctionDecl, arg0: function60000000, arg1: inst_block60000013, type: type(inst6000003D)}
+// CHECK:STDOUT:     inst6000003C:    {kind: FunctionDecl, arg0: function60000000, arg1: inst_block60000014, type: type(inst6000003D)}
 // CHECK:STDOUT:     inst6000003D:    {kind: FunctionType, arg0: function60000000, arg1: specific<none>, type: type(TypeType)}
 // CHECK:STDOUT:     inst6000003E:    {kind: StructValue, arg0: inst_block_empty, type: type(inst6000003D)}
 // CHECK:STDOUT:     inst6000003F:    {kind: RequireCompleteType, arg0: inst6000001C, type: type(inst(WitnessType))}
@@ -517,7 +517,7 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:     inst60000045:    {kind: RequireCompleteType, arg0: inst60000030, type: type(inst(WitnessType))}
 // CHECK:STDOUT:     inst60000046:    {kind: NameRef, arg0: name2, arg1: inst6000001E, type: type(symbolic_constant60000004)}
 // CHECK:STDOUT:     inst60000047:    {kind: TupleLiteral, arg0: inst_block_empty, type: type(inst60000025)}
-// CHECK:STDOUT:     inst60000048:    {kind: TupleLiteral, arg0: inst_block60000019, type: type(symbolic_constant6000000A)}
+// CHECK:STDOUT:     inst60000048:    {kind: TupleLiteral, arg0: inst_block6000001A, type: type(symbolic_constant6000000A)}
 // CHECK:STDOUT:     inst60000049:    {kind: RequireCompleteType, arg0: inst6000002E, type: type(inst(WitnessType))}
 // CHECK:STDOUT:     inst6000004A:    {kind: TupleAccess, arg0: inst6000003A, arg1: element0, type: type(symbolic_constant60000004)}
 // CHECK:STDOUT:     inst6000004B:    {kind: RequireCompleteType, arg0: inst6000001C, type: type(inst(WitnessType))}
@@ -560,7 +560,7 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:     inst60000070:    {kind: SymbolicBindingType, arg0: entity_name60000001, arg1: inst6000006F, type: type(TypeType)}
 // CHECK:STDOUT:     inst60000071:    {kind: ConstType, arg0: inst60000070, type: type(TypeType)}
 // CHECK:STDOUT:     inst60000072:    {kind: ImportRefUnloaded, arg0: import_ir_inst19, arg1: entity_name<none>}
-// CHECK:STDOUT:     inst60000073:    {kind: ImplWitnessTable, arg0: inst_block60000026, arg1: impl60000000}
+// CHECK:STDOUT:     inst60000073:    {kind: ImplWitnessTable, arg0: inst_block60000027, arg1: impl60000000}
 // CHECK:STDOUT:     inst60000074:    {kind: ImplWitness, arg0: inst60000073, arg1: specific60000004, type: type(inst(WitnessType))}
 // CHECK:STDOUT:     inst60000075:    {kind: FunctionDecl, arg0: function60000002, arg1: inst_block_empty, type: type(symbolic_constant60000031)}
 // CHECK:STDOUT:     inst60000076:    {kind: FunctionType, arg0: function60000002, arg1: specific60000004, type: type(TypeType)}
@@ -626,7 +626,7 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:     inst600000B2:    {kind: ImportRefLoaded, arg0: import_ir_inst49, arg1: entity_name<none>, type: type(inst(WitnessType))}
 // CHECK:STDOUT:     inst600000B3:    {kind: ImplDecl, arg0: impl60000005, arg1: inst_block_empty}
 // CHECK:STDOUT:     inst600000B4:    {kind: ImportRefUnloaded, arg0: import_ir_inst4B, arg1: entity_name<none>}
-// CHECK:STDOUT:     inst600000B5:    {kind: ImplWitnessTable, arg0: inst_block6000003B, arg1: impl60000005}
+// CHECK:STDOUT:     inst600000B5:    {kind: ImplWitnessTable, arg0: inst_block6000003C, arg1: impl60000005}
 // CHECK:STDOUT:     inst600000B6:    {kind: ImplWitness, arg0: inst600000B5, arg1: specific6000000B, type: type(inst(WitnessType))}
 // CHECK:STDOUT:     inst600000B7:    {kind: SymbolicBindingPattern, arg0: entity_name60000019, type: type(inst60000018)}
 // CHECK:STDOUT:     inst600000B8:    {kind: ImportRefLoaded, arg0: import_ir_inst4E, arg1: entity_name<none>, type: type(TypeType)}
@@ -665,15 +665,15 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:     inst600000D9:    {kind: ImplDecl, arg0: impl60000008, arg1: inst_block_empty}
 // CHECK:STDOUT:     inst600000DA:    {kind: SymbolicBinding, arg0: entity_name6000001C, arg1: inst<none>, type: type(inst6000004E)}
 // CHECK:STDOUT:     inst600000DB:    {kind: SymbolicBindingType, arg0: entity_name6000001C, arg1: inst600000DA, type: type(TypeType)}
-// CHECK:STDOUT:     inst600000DC:    {kind: TupleType, arg0: inst_block60000049, type: type(TypeType)}
+// CHECK:STDOUT:     inst600000DC:    {kind: TupleType, arg0: inst_block6000004A, type: type(TypeType)}
 // CHECK:STDOUT:     inst600000DD:    {kind: ImportRefUnloaded, arg0: import_ir_inst6D, arg1: entity_name<none>}
-// CHECK:STDOUT:     inst600000DE:    {kind: ImplWitnessTable, arg0: inst_block6000004A, arg1: impl60000008}
+// CHECK:STDOUT:     inst600000DE:    {kind: ImplWitnessTable, arg0: inst_block6000004B, arg1: impl60000008}
 // CHECK:STDOUT:     inst600000DF:    {kind: ImplWitness, arg0: inst600000DE, arg1: specific6000000E, type: type(inst(WitnessType))}
 // CHECK:STDOUT:     inst600000E0:    {kind: FunctionDecl, arg0: function60000004, arg1: inst_block_empty, type: type(symbolic_constant60000089)}
 // CHECK:STDOUT:     inst600000E1:    {kind: FunctionType, arg0: function60000004, arg1: specific6000000E, type: type(TypeType)}
 // CHECK:STDOUT:     inst600000E2:    {kind: StructValue, arg0: inst_block_empty, type: type(symbolic_constant60000089)}
-// CHECK:STDOUT:     inst600000E3:    {kind: TupleType, arg0: inst_block6000004C, type: type(TypeType)}
-// CHECK:STDOUT:     inst600000E4:    {kind: TupleValue, arg0: inst_block6000004B, type: type(inst600000E3)}
+// CHECK:STDOUT:     inst600000E3:    {kind: TupleType, arg0: inst_block6000004D, type: type(TypeType)}
+// CHECK:STDOUT:     inst600000E4:    {kind: TupleValue, arg0: inst_block6000004C, type: type(inst600000E3)}
 // CHECK:STDOUT:     inst600000E5:    {kind: PatternType, arg0: inst600000DC, type: type(TypeType)}
 // CHECK:STDOUT:     inst600000E6:    {kind: ReturnSlotPattern, arg0: inst<none>, type: type(symbolic_constant6000008F)}
 // CHECK:STDOUT:     inst600000E7:    {kind: OutParamPattern, arg0: inst600000E6, arg1: call_param1, type: type(symbolic_constant6000008F)}
@@ -688,7 +688,7 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:     inst600000F0:    {kind: SymbolicBindingType, arg0: entity_name60000001, arg1: inst600000EF, type: type(TypeType)}
 // CHECK:STDOUT:     inst600000F1:    {kind: SymbolicBinding, arg0: entity_name6000001C, arg1: inst<none>, type: type(inst6000004E)}
 // CHECK:STDOUT:     inst600000F2:    {kind: SymbolicBindingType, arg0: entity_name6000001C, arg1: inst600000F1, type: type(TypeType)}
-// CHECK:STDOUT:     inst600000F3:    {kind: TupleType, arg0: inst_block60000053, type: type(TypeType)}
+// CHECK:STDOUT:     inst600000F3:    {kind: TupleType, arg0: inst_block60000054, type: type(TypeType)}
 // CHECK:STDOUT:     inst600000F4:    {kind: PatternType, arg0: inst600000F3, type: type(TypeType)}
 // CHECK:STDOUT:     inst600000F5:    {kind: InitForm, arg0: inst600000F3, arg1: call_param1, type: type(inst(FormType))}
 // CHECK:STDOUT:     inst600000F6:    {kind: LookupImplWitness, arg0: inst600000DA, arg1: specific_interface60000000, type: type(inst(WitnessType))}
@@ -722,10 +722,10 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:     inst60000112:    {kind: ImportRefLoaded, arg0: import_ir_inst91, arg1: entity_name<none>, type: type(inst6000004E)}
 // CHECK:STDOUT:     inst60000113:    {kind: SymbolicBinding, arg0: entity_name60000001, arg1: inst<none>, type: type(inst6000004E)}
 // CHECK:STDOUT:     inst60000114:    {kind: SymbolicBinding, arg0: entity_name6000001C, arg1: inst<none>, type: type(inst6000004E)}
-// CHECK:STDOUT:     inst60000115:    {kind: TupleValue, arg0: inst_block60000060, type: type(inst600000E3)}
+// CHECK:STDOUT:     inst60000115:    {kind: TupleValue, arg0: inst_block60000061, type: type(inst600000E3)}
 // CHECK:STDOUT:     inst60000116:    {kind: SymbolicBindingType, arg0: entity_name60000001, arg1: inst60000113, type: type(TypeType)}
 // CHECK:STDOUT:     inst60000117:    {kind: SymbolicBindingType, arg0: entity_name6000001C, arg1: inst60000114, type: type(TypeType)}
-// CHECK:STDOUT:     inst60000118:    {kind: TupleType, arg0: inst_block60000061, type: type(TypeType)}
+// CHECK:STDOUT:     inst60000118:    {kind: TupleType, arg0: inst_block60000062, type: type(TypeType)}
 // CHECK:STDOUT:     inst60000119:    {kind: ImplWitness, arg0: inst600000DE, arg1: specific60000016, type: type(inst(WitnessType))}
 // CHECK:STDOUT:     inst6000011A:    {kind: FunctionType, arg0: function60000004, arg1: specific60000016, type: type(TypeType)}
 // CHECK:STDOUT:     inst6000011B:    {kind: StructValue, arg0: inst_block_empty, type: type(symbolic_constant600000D4)}
@@ -733,15 +733,15 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:     inst6000011D:    {kind: ImplDecl, arg0: impl60000009, arg1: inst_block_empty}
 // CHECK:STDOUT:     inst6000011E:    {kind: SymbolicBinding, arg0: entity_name6000002B, arg1: inst<none>, type: type(inst6000004E)}
 // CHECK:STDOUT:     inst6000011F:    {kind: SymbolicBindingType, arg0: entity_name6000002B, arg1: inst6000011E, type: type(TypeType)}
-// CHECK:STDOUT:     inst60000120:    {kind: TupleType, arg0: inst_block60000066, type: type(TypeType)}
+// CHECK:STDOUT:     inst60000120:    {kind: TupleType, arg0: inst_block60000067, type: type(TypeType)}
 // CHECK:STDOUT:     inst60000121:    {kind: ImportRefUnloaded, arg0: import_ir_inst9D, arg1: entity_name<none>}
-// CHECK:STDOUT:     inst60000122:    {kind: ImplWitnessTable, arg0: inst_block60000067, arg1: impl60000009}
+// CHECK:STDOUT:     inst60000122:    {kind: ImplWitnessTable, arg0: inst_block60000068, arg1: impl60000009}
 // CHECK:STDOUT:     inst60000123:    {kind: ImplWitness, arg0: inst60000122, arg1: specific60000017, type: type(inst(WitnessType))}
 // CHECK:STDOUT:     inst60000124:    {kind: FunctionDecl, arg0: function60000005, arg1: inst_block_empty, type: type(symbolic_constant600000DC)}
 // CHECK:STDOUT:     inst60000125:    {kind: FunctionType, arg0: function60000005, arg1: specific60000017, type: type(TypeType)}
 // CHECK:STDOUT:     inst60000126:    {kind: StructValue, arg0: inst_block_empty, type: type(symbolic_constant600000DC)}
-// CHECK:STDOUT:     inst60000127:    {kind: TupleType, arg0: inst_block60000069, type: type(TypeType)}
-// CHECK:STDOUT:     inst60000128:    {kind: TupleValue, arg0: inst_block60000068, type: type(inst60000127)}
+// CHECK:STDOUT:     inst60000127:    {kind: TupleType, arg0: inst_block6000006A, type: type(TypeType)}
+// CHECK:STDOUT:     inst60000128:    {kind: TupleValue, arg0: inst_block60000069, type: type(inst60000127)}
 // CHECK:STDOUT:     inst60000129:    {kind: PatternType, arg0: inst60000120, type: type(TypeType)}
 // CHECK:STDOUT:     inst6000012A:    {kind: ReturnSlotPattern, arg0: inst<none>, type: type(symbolic_constant600000E2)}
 // CHECK:STDOUT:     inst6000012B:    {kind: OutParamPattern, arg0: inst6000012A, arg1: call_param1, type: type(symbolic_constant600000E2)}
@@ -759,7 +759,7 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:     inst60000137:    {kind: SymbolicBindingType, arg0: entity_name6000001C, arg1: inst60000136, type: type(TypeType)}
 // CHECK:STDOUT:     inst60000138:    {kind: SymbolicBinding, arg0: entity_name6000002B, arg1: inst<none>, type: type(inst6000004E)}
 // CHECK:STDOUT:     inst60000139:    {kind: SymbolicBindingType, arg0: entity_name6000002B, arg1: inst60000138, type: type(TypeType)}
-// CHECK:STDOUT:     inst6000013A:    {kind: TupleType, arg0: inst_block60000070, type: type(TypeType)}
+// CHECK:STDOUT:     inst6000013A:    {kind: TupleType, arg0: inst_block60000071, type: type(TypeType)}
 // CHECK:STDOUT:     inst6000013B:    {kind: PatternType, arg0: inst6000013A, type: type(TypeType)}
 // CHECK:STDOUT:     inst6000013C:    {kind: InitForm, arg0: inst6000013A, arg1: call_param1, type: type(inst(FormType))}
 // CHECK:STDOUT:     inst6000013D:    {kind: LookupImplWitness, arg0: inst6000011E, arg1: specific_interface60000000, type: type(inst(WitnessType))}
@@ -802,11 +802,11 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:     inst60000162:    {kind: SymbolicBinding, arg0: entity_name60000001, arg1: inst<none>, type: type(inst6000004E)}
 // CHECK:STDOUT:     inst60000163:    {kind: SymbolicBinding, arg0: entity_name6000001C, arg1: inst<none>, type: type(inst6000004E)}
 // CHECK:STDOUT:     inst60000164:    {kind: SymbolicBinding, arg0: entity_name6000002B, arg1: inst<none>, type: type(inst6000004E)}
-// CHECK:STDOUT:     inst60000165:    {kind: TupleValue, arg0: inst_block6000007F, type: type(inst60000127)}
+// CHECK:STDOUT:     inst60000165:    {kind: TupleValue, arg0: inst_block60000080, type: type(inst60000127)}
 // CHECK:STDOUT:     inst60000166:    {kind: SymbolicBindingType, arg0: entity_name60000001, arg1: inst60000162, type: type(TypeType)}
 // CHECK:STDOUT:     inst60000167:    {kind: SymbolicBindingType, arg0: entity_name6000001C, arg1: inst60000163, type: type(TypeType)}
 // CHECK:STDOUT:     inst60000168:    {kind: SymbolicBindingType, arg0: entity_name6000002B, arg1: inst60000164, type: type(TypeType)}
-// CHECK:STDOUT:     inst60000169:    {kind: TupleType, arg0: inst_block60000080, type: type(TypeType)}
+// CHECK:STDOUT:     inst60000169:    {kind: TupleType, arg0: inst_block60000081, type: type(TypeType)}
 // CHECK:STDOUT:     inst6000016A:    {kind: ImplWitness, arg0: inst60000122, arg1: specific60000021, type: type(inst(WitnessType))}
 // CHECK:STDOUT:     inst6000016B:    {kind: FunctionType, arg0: function60000005, arg1: specific60000021, type: type(TypeType)}
 // CHECK:STDOUT:     inst6000016C:    {kind: StructValue, arg0: inst_block_empty, type: type(symbolic_constant6000013C)}
@@ -815,13 +815,13 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:     inst6000016F:    {kind: RequireSpecificDefinition, arg0: specific60000022, type: type(inst(RequireSpecificDefinitionType))}
 // CHECK:STDOUT:     inst60000170:    {kind: LookupImplWitness, arg0: inst6000001C, arg1: specific_interface60000000, type: type(inst(WitnessType))}
 // CHECK:STDOUT:     inst60000171:    {kind: LookupImplWitness, arg0: inst6000001D, arg1: specific_interface60000000, type: type(inst(WitnessType))}
-// CHECK:STDOUT:     inst60000172:    {kind: FacetValue, arg0: inst6000001C, arg1: inst_block60000087, type: type(inst6000004E)}
+// CHECK:STDOUT:     inst60000172:    {kind: FacetValue, arg0: inst6000001C, arg1: inst_block60000088, type: type(inst6000004E)}
 // CHECK:STDOUT:     inst60000173:    {kind: FunctionType, arg0: function60000001, arg1: specific60000023, type: type(TypeType)}
 // CHECK:STDOUT:     inst60000174:    {kind: StructValue, arg0: inst_block_empty, type: type(symbolic_constant60000144)}
 // CHECK:STDOUT:     inst60000175:    {kind: FunctionTypeWithSelfType, arg0: inst60000173, arg1: inst60000172, type: type(TypeType)}
 // CHECK:STDOUT:     inst60000176:    {kind: ImplWitnessAccess, arg0: inst60000170, arg1: element0, type: type(symbolic_constant6000014A)}
 // CHECK:STDOUT:     inst60000177:    {kind: ImplWitnessAccess, arg0: inst60000170, arg1: element0, type: type(symbolic_constant60000146)}
-// CHECK:STDOUT:     inst60000178:    {kind: FacetValue, arg0: inst6000001D, arg1: inst_block6000008A, type: type(inst6000004E)}
+// CHECK:STDOUT:     inst60000178:    {kind: FacetValue, arg0: inst6000001D, arg1: inst_block6000008B, type: type(inst6000004E)}
 // CHECK:STDOUT:     inst60000179:    {kind: FunctionType, arg0: function60000001, arg1: specific60000024, type: type(TypeType)}
 // CHECK:STDOUT:     inst6000017A:    {kind: FunctionTypeWithSelfType, arg0: inst60000179, arg1: inst60000178, type: type(TypeType)}
 // CHECK:STDOUT:     inst6000017B:    {kind: ImplWitnessAccess, arg0: inst60000171, arg1: element0, type: type(symbolic_constant6000014A)}
@@ -831,12 +831,12 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:     inst6000017F:    {kind: SpecificImplFunction, arg0: inst6000017B, arg1: specific60000026, type: type(inst(SpecificFunctionType))}
 // CHECK:STDOUT:     inst60000180:    {kind: BoundMethod, arg0: inst60000046, arg1: inst6000017D, type: type(inst(BoundMethodType))}
 // CHECK:STDOUT:     inst60000181:    {kind: RequireCompleteType, arg0: inst6000001C, type: type(inst(WitnessType))}
-// CHECK:STDOUT:     inst60000182:    {kind: Call, arg0: inst60000180, arg1: inst_block6000008E, type: type(symbolic_constant60000004)}
+// CHECK:STDOUT:     inst60000182:    {kind: Call, arg0: inst60000180, arg1: inst_block6000008F, type: type(symbolic_constant60000004)}
 // CHECK:STDOUT:     inst60000183:    {kind: InPlaceInit, arg0: inst60000182, arg1: inst6000004A, type: type(symbolic_constant60000004)}
 // CHECK:STDOUT:     inst60000184:    {kind: TupleAccess, arg0: inst6000003A, arg1: element1, type: type(inst60000025)}
 // CHECK:STDOUT:     inst60000185:    {kind: TupleInit, arg0: inst_block_empty, arg1: inst<none>, type: type(inst60000025)}
 // CHECK:STDOUT:     inst60000186:    {kind: Converted, arg0: inst60000047, arg1: inst60000185, type: type(inst60000025)}
-// CHECK:STDOUT:     inst60000187:    {kind: TupleInit, arg0: inst_block6000008F, arg1: inst6000003A, type: type(symbolic_constant6000000A)}
+// CHECK:STDOUT:     inst60000187:    {kind: TupleInit, arg0: inst_block60000090, arg1: inst6000003A, type: type(symbolic_constant6000000A)}
 // CHECK:STDOUT:     inst60000188:    {kind: Converted, arg0: inst60000048, arg1: inst60000187, type: type(symbolic_constant6000000A)}
 // CHECK:STDOUT:     inst60000189:    {kind: ReturnExpr, arg0: inst60000188, arg1: inst6000003A}
 // CHECK:STDOUT:   constant_values:
@@ -1543,6 +1543,7 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:     inst_block_empty: {}
 // CHECK:STDOUT:     exports:
 // CHECK:STDOUT:       0:               inst6000003C
+// CHECK:STDOUT:     generated:       {}
 // CHECK:STDOUT:     imports:
 // CHECK:STDOUT:       0:               inst60000011
 // CHECK:STDOUT:       1:               inst6000004C
@@ -1659,51 +1660,51 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:       112:             inst60000160
 // CHECK:STDOUT:       113:             inst60000161
 // CHECK:STDOUT:     global_init:     {}
-// CHECK:STDOUT:     inst_block60000004:
-// CHECK:STDOUT:       0:               inst60000013
 // CHECK:STDOUT:     inst_block60000005:
-// CHECK:STDOUT:       0:               inst60000019
+// CHECK:STDOUT:       0:               inst60000013
 // CHECK:STDOUT:     inst_block60000006:
+// CHECK:STDOUT:       0:               inst60000019
+// CHECK:STDOUT:     inst_block60000007:
 // CHECK:STDOUT:       0:               inst6000001A
 // CHECK:STDOUT:       1:               inst6000001B
-// CHECK:STDOUT:     inst_block60000007:
-// CHECK:STDOUT:       0:               inst60000022
 // CHECK:STDOUT:     inst_block60000008:
+// CHECK:STDOUT:       0:               inst60000022
+// CHECK:STDOUT:     inst_block60000009:
 // CHECK:STDOUT:       0:               inst60000024
 // CHECK:STDOUT:       1:               inst60000026
-// CHECK:STDOUT:     inst_block60000009:
+// CHECK:STDOUT:     inst_block6000000A:
 // CHECK:STDOUT:       0:               inst(TypeType)
 // CHECK:STDOUT:       1:               inst60000025
-// CHECK:STDOUT:     inst_block6000000A:
-// CHECK:STDOUT:       0:               inst6000001C
-// CHECK:STDOUT:       1:               inst60000027
 // CHECK:STDOUT:     inst_block6000000B:
-// CHECK:STDOUT:       0:               inst6000001D
+// CHECK:STDOUT:       0:               inst6000001C
 // CHECK:STDOUT:       1:               inst60000027
 // CHECK:STDOUT:     inst_block6000000C:
-// CHECK:STDOUT:       0:               inst6000001C
-// CHECK:STDOUT:       1:               inst6000002D
+// CHECK:STDOUT:       0:               inst6000001D
+// CHECK:STDOUT:       1:               inst60000027
 // CHECK:STDOUT:     inst_block6000000D:
 // CHECK:STDOUT:       0:               inst6000001C
-// CHECK:STDOUT:       1:               inst60000025
+// CHECK:STDOUT:       1:               inst6000002D
 // CHECK:STDOUT:     inst_block6000000E:
-// CHECK:STDOUT:       0:               inst6000001D
+// CHECK:STDOUT:       0:               inst6000001C
 // CHECK:STDOUT:       1:               inst60000025
 // CHECK:STDOUT:     inst_block6000000F:
-// CHECK:STDOUT:       0:               inst60000037
+// CHECK:STDOUT:       0:               inst6000001D
+// CHECK:STDOUT:       1:               inst60000025
 // CHECK:STDOUT:     inst_block60000010:
+// CHECK:STDOUT:       0:               inst60000037
+// CHECK:STDOUT:     inst_block60000011:
 // CHECK:STDOUT:       0:               inst60000022
 // CHECK:STDOUT:       1:               inst60000037
-// CHECK:STDOUT:     inst_block60000011:
+// CHECK:STDOUT:     inst_block60000012:
 // CHECK:STDOUT:       0:               inst60000038
 // CHECK:STDOUT:       1:               inst6000003A
-// CHECK:STDOUT:     inst_block60000012:
+// CHECK:STDOUT:     inst_block60000013:
 // CHECK:STDOUT:       0:               inst60000019
 // CHECK:STDOUT:       1:               inst60000020
 // CHECK:STDOUT:       2:               inst60000022
 // CHECK:STDOUT:       3:               inst60000035
 // CHECK:STDOUT:       4:               inst60000037
-// CHECK:STDOUT:     inst_block60000013:
+// CHECK:STDOUT:     inst_block60000014:
 // CHECK:STDOUT:       0:               inst60000023
 // CHECK:STDOUT:       1:               inst60000024
 // CHECK:STDOUT:       2:               inst60000026
@@ -1718,11 +1719,11 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:       11:              inst6000001E
 // CHECK:STDOUT:       12:              inst6000003A
 // CHECK:STDOUT:       13:              inst6000003B
-// CHECK:STDOUT:     inst_block60000014:
-// CHECK:STDOUT:       0:               inst60000015
 // CHECK:STDOUT:     inst_block60000015:
-// CHECK:STDOUT:       0:               inst60000016
+// CHECK:STDOUT:       0:               inst60000015
 // CHECK:STDOUT:     inst_block60000016:
+// CHECK:STDOUT:       0:               inst60000016
+// CHECK:STDOUT:     inst_block60000017:
 // CHECK:STDOUT:       0:               inst60000017
 // CHECK:STDOUT:       1:               inst6000001D
 // CHECK:STDOUT:       2:               inst60000021
@@ -1730,7 +1731,7 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:       4:               inst60000030
 // CHECK:STDOUT:       5:               inst60000033
 // CHECK:STDOUT:       6:               inst60000036
-// CHECK:STDOUT:     inst_block60000017:
+// CHECK:STDOUT:     inst_block60000018:
 // CHECK:STDOUT:       0:               inst60000016
 // CHECK:STDOUT:       1:               inst6000001C
 // CHECK:STDOUT:       2:               inst6000001F
@@ -1738,7 +1739,7 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:       4:               inst6000002E
 // CHECK:STDOUT:       5:               inst60000032
 // CHECK:STDOUT:       6:               inst60000034
-// CHECK:STDOUT:     inst_block60000018:
+// CHECK:STDOUT:     inst_block60000019:
 // CHECK:STDOUT:       0:               inst60000046
 // CHECK:STDOUT:       1:               inst60000047
 // CHECK:STDOUT:       2:               inst60000048
@@ -1755,85 +1756,85 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:       13:              inst60000187
 // CHECK:STDOUT:       14:              inst60000188
 // CHECK:STDOUT:       15:              inst60000189
-// CHECK:STDOUT:     inst_block60000019:
+// CHECK:STDOUT:     inst_block6000001A:
 // CHECK:STDOUT:       0:               inst60000046
 // CHECK:STDOUT:       1:               inst60000047
-// CHECK:STDOUT:     inst_block6000001A:
-// CHECK:STDOUT:       0:               inst60000052
 // CHECK:STDOUT:     inst_block6000001B:
-// CHECK:STDOUT:       0:               inst60000053
+// CHECK:STDOUT:       0:               inst60000052
 // CHECK:STDOUT:     inst_block6000001C:
-// CHECK:STDOUT:       0:               inst60000050
+// CHECK:STDOUT:       0:               inst60000053
 // CHECK:STDOUT:     inst_block6000001D:
 // CHECK:STDOUT:       0:               inst60000050
+// CHECK:STDOUT:     inst_block6000001E:
+// CHECK:STDOUT:       0:               inst60000050
 // CHECK:STDOUT:       1:               inst60000055
 // CHECK:STDOUT:       2:               inst60000056
-// CHECK:STDOUT:     inst_block6000001E:
-// CHECK:STDOUT:       0:               inst6000005C
-// CHECK:STDOUT:       1:               inst6000005A
 // CHECK:STDOUT:     inst_block6000001F:
 // CHECK:STDOUT:       0:               inst6000005C
+// CHECK:STDOUT:       1:               inst6000005A
 // CHECK:STDOUT:     inst_block60000020:
-// CHECK:STDOUT:       0:               inst6000005A
+// CHECK:STDOUT:       0:               inst6000005C
 // CHECK:STDOUT:     inst_block60000021:
-// CHECK:STDOUT:       0:               inst60000060
+// CHECK:STDOUT:       0:               inst6000005A
 // CHECK:STDOUT:     inst_block60000022:
+// CHECK:STDOUT:       0:               inst60000060
+// CHECK:STDOUT:     inst_block60000023:
 // CHECK:STDOUT:       0:               inst60000061
 // CHECK:STDOUT:       1:               inst60000062
 // CHECK:STDOUT:       2:               inst60000063
 // CHECK:STDOUT:       3:               inst60000064
-// CHECK:STDOUT:     inst_block60000023:
+// CHECK:STDOUT:     inst_block60000024:
 // CHECK:STDOUT:       0:               inst60000050
 // CHECK:STDOUT:       1:               inst60000057
 // CHECK:STDOUT:       2:               inst60000058
 // CHECK:STDOUT:       3:               inst6000005D
-// CHECK:STDOUT:     inst_block60000024:
-// CHECK:STDOUT:       0:               inst60000065
 // CHECK:STDOUT:     inst_block60000025:
 // CHECK:STDOUT:       0:               inst60000065
+// CHECK:STDOUT:     inst_block60000026:
+// CHECK:STDOUT:       0:               inst60000065
 // CHECK:STDOUT:       1:               inst60000066
 // CHECK:STDOUT:       2:               inst60000067
-// CHECK:STDOUT:     inst_block60000026:
-// CHECK:STDOUT:       0:               inst60000072
 // CHECK:STDOUT:     inst_block60000027:
-// CHECK:STDOUT:       0:               inst6000006F
+// CHECK:STDOUT:       0:               inst60000072
 // CHECK:STDOUT:     inst_block60000028:
 // CHECK:STDOUT:       0:               inst6000006F
+// CHECK:STDOUT:     inst_block60000029:
+// CHECK:STDOUT:       0:               inst6000006F
 // CHECK:STDOUT:       1:               inst60000070
 // CHECK:STDOUT:       2:               inst60000071
 // CHECK:STDOUT:       3:               inst60000074
-// CHECK:STDOUT:     inst_block60000029:
+// CHECK:STDOUT:     inst_block6000002A:
 // CHECK:STDOUT:       0:               inst60000076
 // CHECK:STDOUT:       1:               inst60000077
-// CHECK:STDOUT:     inst_block6000002A:
-// CHECK:STDOUT:       0:               inst6000007C
-// CHECK:STDOUT:       1:               inst6000007A
 // CHECK:STDOUT:     inst_block6000002B:
 // CHECK:STDOUT:       0:               inst6000007C
+// CHECK:STDOUT:       1:               inst6000007A
 // CHECK:STDOUT:     inst_block6000002C:
-// CHECK:STDOUT:       0:               inst6000007A
+// CHECK:STDOUT:       0:               inst6000007C
 // CHECK:STDOUT:     inst_block6000002D:
-// CHECK:STDOUT:       0:               inst60000080
+// CHECK:STDOUT:       0:               inst6000007A
 // CHECK:STDOUT:     inst_block6000002E:
+// CHECK:STDOUT:       0:               inst60000080
+// CHECK:STDOUT:     inst_block6000002F:
 // CHECK:STDOUT:       0:               inst60000081
 // CHECK:STDOUT:       1:               inst60000082
 // CHECK:STDOUT:       2:               inst60000083
 // CHECK:STDOUT:       3:               inst60000084
 // CHECK:STDOUT:       4:               inst60000085
-// CHECK:STDOUT:     inst_block6000002F:
+// CHECK:STDOUT:     inst_block60000030:
 // CHECK:STDOUT:       0:               inst6000006F
 // CHECK:STDOUT:       1:               inst60000087
 // CHECK:STDOUT:       2:               inst60000088
-// CHECK:STDOUT:     inst_block60000030:
+// CHECK:STDOUT:     inst_block60000031:
 // CHECK:STDOUT:       0:               inst6000006F
 // CHECK:STDOUT:       1:               inst60000070
 // CHECK:STDOUT:       2:               inst6000008D
 // CHECK:STDOUT:       3:               inst6000008C
-// CHECK:STDOUT:     inst_block60000031:
-// CHECK:STDOUT:       0:               inst60000081
 // CHECK:STDOUT:     inst_block60000032:
 // CHECK:STDOUT:       0:               inst60000081
 // CHECK:STDOUT:     inst_block60000033:
+// CHECK:STDOUT:       0:               inst60000081
+// CHECK:STDOUT:     inst_block60000034:
 // CHECK:STDOUT:       0:               inst60000090
 // CHECK:STDOUT:       1:               inst60000091
 // CHECK:STDOUT:       2:               inst60000092
@@ -1841,81 +1842,81 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:       4:               inst60000094
 // CHECK:STDOUT:       5:               inst60000095
 // CHECK:STDOUT:       6:               inst60000096
-// CHECK:STDOUT:     inst_block60000034:
+// CHECK:STDOUT:     inst_block60000035:
 // CHECK:STDOUT:       0:               inst6000006F
 // CHECK:STDOUT:       1:               inst60000070
 // CHECK:STDOUT:       2:               inst60000071
 // CHECK:STDOUT:       3:               inst60000078
 // CHECK:STDOUT:       4:               inst6000007D
-// CHECK:STDOUT:     inst_block60000035:
-// CHECK:STDOUT:       0:               inst60000098
 // CHECK:STDOUT:     inst_block60000036:
-// CHECK:STDOUT:       0:               inst6000009B
+// CHECK:STDOUT:       0:               inst60000098
 // CHECK:STDOUT:     inst_block60000037:
-// CHECK:STDOUT:       0:               inst6000009C
+// CHECK:STDOUT:       0:               inst6000009B
 // CHECK:STDOUT:     inst_block60000038:
 // CHECK:STDOUT:       0:               inst6000009C
+// CHECK:STDOUT:     inst_block60000039:
+// CHECK:STDOUT:       0:               inst6000009C
 // CHECK:STDOUT:       1:               inst6000009D
 // CHECK:STDOUT:       2:               inst6000009E
 // CHECK:STDOUT:       3:               inst6000009F
-// CHECK:STDOUT:     inst_block60000039:
-// CHECK:STDOUT:       0:               inst6000009C
 // CHECK:STDOUT:     inst_block6000003A:
+// CHECK:STDOUT:       0:               inst6000009C
+// CHECK:STDOUT:     inst_block6000003B:
 // CHECK:STDOUT:       0:               inst600000A0
 // CHECK:STDOUT:       1:               inst600000A1
-// CHECK:STDOUT:     inst_block6000003B:
-// CHECK:STDOUT:       0:               inst600000B4
 // CHECK:STDOUT:     inst_block6000003C:
+// CHECK:STDOUT:       0:               inst600000B4
+// CHECK:STDOUT:     inst_block6000003D:
 // CHECK:STDOUT:       0:               inst60000016
 // CHECK:STDOUT:       1:               inst6000001C
 // CHECK:STDOUT:       2:               inst600000B6
-// CHECK:STDOUT:     inst_block6000003D:
-// CHECK:STDOUT:       0:               inst600000B7
 // CHECK:STDOUT:     inst_block6000003E:
-// CHECK:STDOUT:       0:               inst600000BA
+// CHECK:STDOUT:       0:               inst600000B7
 // CHECK:STDOUT:     inst_block6000003F:
-// CHECK:STDOUT:       0:               inst600000BB
+// CHECK:STDOUT:       0:               inst600000BA
 // CHECK:STDOUT:     inst_block60000040:
 // CHECK:STDOUT:       0:               inst600000BB
+// CHECK:STDOUT:     inst_block60000041:
+// CHECK:STDOUT:       0:               inst600000BB
 // CHECK:STDOUT:       1:               inst600000BC
 // CHECK:STDOUT:       2:               inst600000BD
-// CHECK:STDOUT:     inst_block60000041:
-// CHECK:STDOUT:       0:               inst600000C4
-// CHECK:STDOUT:       1:               inst600000C2
 // CHECK:STDOUT:     inst_block60000042:
 // CHECK:STDOUT:       0:               inst600000C4
+// CHECK:STDOUT:       1:               inst600000C2
 // CHECK:STDOUT:     inst_block60000043:
-// CHECK:STDOUT:       0:               inst600000C2
+// CHECK:STDOUT:       0:               inst600000C4
 // CHECK:STDOUT:     inst_block60000044:
-// CHECK:STDOUT:       0:               inst600000C8
+// CHECK:STDOUT:       0:               inst600000C2
 // CHECK:STDOUT:     inst_block60000045:
+// CHECK:STDOUT:       0:               inst600000C8
+// CHECK:STDOUT:     inst_block60000046:
 // CHECK:STDOUT:       0:               inst600000C9
 // CHECK:STDOUT:       1:               inst600000CA
 // CHECK:STDOUT:       2:               inst600000CB
 // CHECK:STDOUT:       3:               inst600000CC
-// CHECK:STDOUT:     inst_block60000046:
+// CHECK:STDOUT:     inst_block60000047:
 // CHECK:STDOUT:       0:               inst60000016
 // CHECK:STDOUT:       1:               inst6000001C
 // CHECK:STDOUT:       2:               inst6000001F
 // CHECK:STDOUT:       3:               inst600000C5
-// CHECK:STDOUT:     inst_block60000047:
-// CHECK:STDOUT:       0:               inst600000BB
 // CHECK:STDOUT:     inst_block60000048:
+// CHECK:STDOUT:       0:               inst600000BB
+// CHECK:STDOUT:     inst_block60000049:
 // CHECK:STDOUT:       0:               inst600000CD
 // CHECK:STDOUT:       1:               inst600000CE
 // CHECK:STDOUT:       2:               inst600000CF
-// CHECK:STDOUT:     inst_block60000049:
+// CHECK:STDOUT:     inst_block6000004A:
 // CHECK:STDOUT:       0:               inst60000070
 // CHECK:STDOUT:       1:               inst600000DB
-// CHECK:STDOUT:     inst_block6000004A:
-// CHECK:STDOUT:       0:               inst600000DD
 // CHECK:STDOUT:     inst_block6000004B:
+// CHECK:STDOUT:       0:               inst600000DD
+// CHECK:STDOUT:     inst_block6000004C:
 // CHECK:STDOUT:       0:               inst6000006F
 // CHECK:STDOUT:       1:               inst600000DA
-// CHECK:STDOUT:     inst_block6000004C:
+// CHECK:STDOUT:     inst_block6000004D:
 // CHECK:STDOUT:       0:               inst6000004E
 // CHECK:STDOUT:       1:               inst6000004E
-// CHECK:STDOUT:     inst_block6000004D:
+// CHECK:STDOUT:     inst_block6000004E:
 // CHECK:STDOUT:       0:               inst6000006F
 // CHECK:STDOUT:       1:               inst600000DA
 // CHECK:STDOUT:       2:               inst600000E4
@@ -1923,23 +1924,23 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:       4:               inst600000DB
 // CHECK:STDOUT:       5:               inst600000DC
 // CHECK:STDOUT:       6:               inst600000DF
-// CHECK:STDOUT:     inst_block6000004E:
+// CHECK:STDOUT:     inst_block6000004F:
 // CHECK:STDOUT:       0:               inst600000E1
 // CHECK:STDOUT:       1:               inst600000E2
-// CHECK:STDOUT:     inst_block6000004F:
-// CHECK:STDOUT:       0:               inst600000E9
-// CHECK:STDOUT:       1:               inst600000E7
 // CHECK:STDOUT:     inst_block60000050:
 // CHECK:STDOUT:       0:               inst600000E9
+// CHECK:STDOUT:       1:               inst600000E7
 // CHECK:STDOUT:     inst_block60000051:
-// CHECK:STDOUT:       0:               inst600000E7
+// CHECK:STDOUT:       0:               inst600000E9
 // CHECK:STDOUT:     inst_block60000052:
+// CHECK:STDOUT:       0:               inst600000E7
+// CHECK:STDOUT:     inst_block60000053:
 // CHECK:STDOUT:       0:               inst600000ED
 // CHECK:STDOUT:       1:               inst600000EE
-// CHECK:STDOUT:     inst_block60000053:
+// CHECK:STDOUT:     inst_block60000054:
 // CHECK:STDOUT:       0:               inst600000F0
 // CHECK:STDOUT:       1:               inst600000F2
-// CHECK:STDOUT:     inst_block60000054:
+// CHECK:STDOUT:     inst_block60000055:
 // CHECK:STDOUT:       0:               inst600000EF
 // CHECK:STDOUT:       1:               inst600000F0
 // CHECK:STDOUT:       2:               inst600000F1
@@ -1947,26 +1948,26 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:       4:               inst600000F3
 // CHECK:STDOUT:       5:               inst600000F4
 // CHECK:STDOUT:       6:               inst600000F5
-// CHECK:STDOUT:     inst_block60000055:
-// CHECK:STDOUT:       0:               inst600000DA
 // CHECK:STDOUT:     inst_block60000056:
 // CHECK:STDOUT:       0:               inst600000DA
+// CHECK:STDOUT:     inst_block60000057:
+// CHECK:STDOUT:       0:               inst600000DA
 // CHECK:STDOUT:       1:               inst600000F7
 // CHECK:STDOUT:       2:               inst600000F8
-// CHECK:STDOUT:     inst_block60000057:
+// CHECK:STDOUT:     inst_block60000058:
 // CHECK:STDOUT:       0:               inst600000DA
 // CHECK:STDOUT:       1:               inst600000DB
 // CHECK:STDOUT:       2:               inst600000FD
 // CHECK:STDOUT:       3:               inst600000FC
-// CHECK:STDOUT:     inst_block60000058:
-// CHECK:STDOUT:       0:               inst600000EF
 // CHECK:STDOUT:     inst_block60000059:
 // CHECK:STDOUT:       0:               inst600000EF
 // CHECK:STDOUT:     inst_block6000005A:
-// CHECK:STDOUT:       0:               inst600000F1
+// CHECK:STDOUT:       0:               inst600000EF
 // CHECK:STDOUT:     inst_block6000005B:
 // CHECK:STDOUT:       0:               inst600000F1
 // CHECK:STDOUT:     inst_block6000005C:
+// CHECK:STDOUT:       0:               inst600000F1
+// CHECK:STDOUT:     inst_block6000005D:
 // CHECK:STDOUT:       0:               inst60000100
 // CHECK:STDOUT:       1:               inst60000101
 // CHECK:STDOUT:       2:               inst60000102
@@ -1980,7 +1981,7 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:       10:              inst6000010A
 // CHECK:STDOUT:       11:              inst6000010B
 // CHECK:STDOUT:       12:              inst6000010C
-// CHECK:STDOUT:     inst_block6000005D:
+// CHECK:STDOUT:     inst_block6000005E:
 // CHECK:STDOUT:       0:               inst6000006F
 // CHECK:STDOUT:       1:               inst60000070
 // CHECK:STDOUT:       2:               inst600000DA
@@ -1988,22 +1989,22 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:       4:               inst600000DC
 // CHECK:STDOUT:       5:               inst600000E5
 // CHECK:STDOUT:       6:               inst600000EA
-// CHECK:STDOUT:     inst_block6000005E:
+// CHECK:STDOUT:     inst_block6000005F:
 // CHECK:STDOUT:       0:               inst6000010E
 // CHECK:STDOUT:       1:               inst6000010D
-// CHECK:STDOUT:     inst_block6000005F:
+// CHECK:STDOUT:     inst_block60000060:
 // CHECK:STDOUT:       0:               inst60000111
 // CHECK:STDOUT:       1:               inst60000112
-// CHECK:STDOUT:     inst_block60000060:
+// CHECK:STDOUT:     inst_block60000061:
 // CHECK:STDOUT:       0:               inst60000113
 // CHECK:STDOUT:       1:               inst60000114
-// CHECK:STDOUT:     inst_block60000061:
+// CHECK:STDOUT:     inst_block60000062:
 // CHECK:STDOUT:       0:               inst60000116
 // CHECK:STDOUT:       1:               inst60000117
-// CHECK:STDOUT:     inst_block60000062:
+// CHECK:STDOUT:     inst_block60000063:
 // CHECK:STDOUT:       0:               inst60000113
 // CHECK:STDOUT:       1:               inst60000114
-// CHECK:STDOUT:     inst_block60000063:
+// CHECK:STDOUT:     inst_block60000064:
 // CHECK:STDOUT:       0:               inst60000113
 // CHECK:STDOUT:       1:               inst60000114
 // CHECK:STDOUT:       2:               inst60000115
@@ -2011,27 +2012,27 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:       4:               inst60000117
 // CHECK:STDOUT:       5:               inst60000118
 // CHECK:STDOUT:       6:               inst60000119
-// CHECK:STDOUT:     inst_block60000064:
+// CHECK:STDOUT:     inst_block60000065:
 // CHECK:STDOUT:       0:               inst60000113
 // CHECK:STDOUT:       1:               inst60000114
-// CHECK:STDOUT:     inst_block60000065:
+// CHECK:STDOUT:     inst_block60000066:
 // CHECK:STDOUT:       0:               inst6000011A
 // CHECK:STDOUT:       1:               inst6000011B
-// CHECK:STDOUT:     inst_block60000066:
+// CHECK:STDOUT:     inst_block60000067:
 // CHECK:STDOUT:       0:               inst60000070
 // CHECK:STDOUT:       1:               inst600000DB
 // CHECK:STDOUT:       2:               inst6000011F
-// CHECK:STDOUT:     inst_block60000067:
-// CHECK:STDOUT:       0:               inst60000121
 // CHECK:STDOUT:     inst_block60000068:
+// CHECK:STDOUT:       0:               inst60000121
+// CHECK:STDOUT:     inst_block60000069:
 // CHECK:STDOUT:       0:               inst6000006F
 // CHECK:STDOUT:       1:               inst600000DA
 // CHECK:STDOUT:       2:               inst6000011E
-// CHECK:STDOUT:     inst_block60000069:
+// CHECK:STDOUT:     inst_block6000006A:
 // CHECK:STDOUT:       0:               inst6000004E
 // CHECK:STDOUT:       1:               inst6000004E
 // CHECK:STDOUT:       2:               inst6000004E
-// CHECK:STDOUT:     inst_block6000006A:
+// CHECK:STDOUT:     inst_block6000006B:
 // CHECK:STDOUT:       0:               inst6000006F
 // CHECK:STDOUT:       1:               inst600000DA
 // CHECK:STDOUT:       2:               inst6000011E
@@ -2041,25 +2042,25 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:       6:               inst6000011F
 // CHECK:STDOUT:       7:               inst60000120
 // CHECK:STDOUT:       8:               inst60000123
-// CHECK:STDOUT:     inst_block6000006B:
+// CHECK:STDOUT:     inst_block6000006C:
 // CHECK:STDOUT:       0:               inst60000125
 // CHECK:STDOUT:       1:               inst60000126
-// CHECK:STDOUT:     inst_block6000006C:
-// CHECK:STDOUT:       0:               inst6000012D
-// CHECK:STDOUT:       1:               inst6000012B
 // CHECK:STDOUT:     inst_block6000006D:
 // CHECK:STDOUT:       0:               inst6000012D
+// CHECK:STDOUT:       1:               inst6000012B
 // CHECK:STDOUT:     inst_block6000006E:
-// CHECK:STDOUT:       0:               inst6000012B
+// CHECK:STDOUT:       0:               inst6000012D
 // CHECK:STDOUT:     inst_block6000006F:
+// CHECK:STDOUT:       0:               inst6000012B
+// CHECK:STDOUT:     inst_block60000070:
 // CHECK:STDOUT:       0:               inst60000131
 // CHECK:STDOUT:       1:               inst60000132
 // CHECK:STDOUT:       2:               inst60000133
-// CHECK:STDOUT:     inst_block60000070:
+// CHECK:STDOUT:     inst_block60000071:
 // CHECK:STDOUT:       0:               inst60000135
 // CHECK:STDOUT:       1:               inst60000137
 // CHECK:STDOUT:       2:               inst60000139
-// CHECK:STDOUT:     inst_block60000071:
+// CHECK:STDOUT:     inst_block60000072:
 // CHECK:STDOUT:       0:               inst60000134
 // CHECK:STDOUT:       1:               inst60000135
 // CHECK:STDOUT:       2:               inst60000136
@@ -2069,30 +2070,30 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:       6:               inst6000013A
 // CHECK:STDOUT:       7:               inst6000013B
 // CHECK:STDOUT:       8:               inst6000013C
-// CHECK:STDOUT:     inst_block60000072:
-// CHECK:STDOUT:       0:               inst6000011E
 // CHECK:STDOUT:     inst_block60000073:
 // CHECK:STDOUT:       0:               inst6000011E
+// CHECK:STDOUT:     inst_block60000074:
+// CHECK:STDOUT:       0:               inst6000011E
 // CHECK:STDOUT:       1:               inst6000013E
 // CHECK:STDOUT:       2:               inst6000013F
-// CHECK:STDOUT:     inst_block60000074:
+// CHECK:STDOUT:     inst_block60000075:
 // CHECK:STDOUT:       0:               inst6000011E
 // CHECK:STDOUT:       1:               inst6000011F
 // CHECK:STDOUT:       2:               inst60000144
 // CHECK:STDOUT:       3:               inst60000143
-// CHECK:STDOUT:     inst_block60000075:
-// CHECK:STDOUT:       0:               inst60000134
 // CHECK:STDOUT:     inst_block60000076:
 // CHECK:STDOUT:       0:               inst60000134
 // CHECK:STDOUT:     inst_block60000077:
-// CHECK:STDOUT:       0:               inst60000136
+// CHECK:STDOUT:       0:               inst60000134
 // CHECK:STDOUT:     inst_block60000078:
 // CHECK:STDOUT:       0:               inst60000136
 // CHECK:STDOUT:     inst_block60000079:
-// CHECK:STDOUT:       0:               inst60000138
+// CHECK:STDOUT:       0:               inst60000136
 // CHECK:STDOUT:     inst_block6000007A:
 // CHECK:STDOUT:       0:               inst60000138
 // CHECK:STDOUT:     inst_block6000007B:
+// CHECK:STDOUT:       0:               inst60000138
+// CHECK:STDOUT:     inst_block6000007C:
 // CHECK:STDOUT:       0:               inst60000147
 // CHECK:STDOUT:       1:               inst60000148
 // CHECK:STDOUT:       2:               inst60000149
@@ -2112,7 +2113,7 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:       16:              inst60000157
 // CHECK:STDOUT:       17:              inst60000158
 // CHECK:STDOUT:       18:              inst60000159
-// CHECK:STDOUT:     inst_block6000007C:
+// CHECK:STDOUT:     inst_block6000007D:
 // CHECK:STDOUT:       0:               inst6000006F
 // CHECK:STDOUT:       1:               inst60000070
 // CHECK:STDOUT:       2:               inst600000DA
@@ -2122,27 +2123,27 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:       6:               inst60000120
 // CHECK:STDOUT:       7:               inst60000129
 // CHECK:STDOUT:       8:               inst6000012E
-// CHECK:STDOUT:     inst_block6000007D:
+// CHECK:STDOUT:     inst_block6000007E:
 // CHECK:STDOUT:       0:               inst6000015C
 // CHECK:STDOUT:       1:               inst6000015B
 // CHECK:STDOUT:       2:               inst6000015A
-// CHECK:STDOUT:     inst_block6000007E:
+// CHECK:STDOUT:     inst_block6000007F:
 // CHECK:STDOUT:       0:               inst6000015F
 // CHECK:STDOUT:       1:               inst60000160
 // CHECK:STDOUT:       2:               inst60000161
-// CHECK:STDOUT:     inst_block6000007F:
+// CHECK:STDOUT:     inst_block60000080:
 // CHECK:STDOUT:       0:               inst60000162
 // CHECK:STDOUT:       1:               inst60000163
 // CHECK:STDOUT:       2:               inst60000164
-// CHECK:STDOUT:     inst_block60000080:
+// CHECK:STDOUT:     inst_block60000081:
 // CHECK:STDOUT:       0:               inst60000166
 // CHECK:STDOUT:       1:               inst60000167
 // CHECK:STDOUT:       2:               inst60000168
-// CHECK:STDOUT:     inst_block60000081:
+// CHECK:STDOUT:     inst_block60000082:
 // CHECK:STDOUT:       0:               inst60000162
 // CHECK:STDOUT:       1:               inst60000163
 // CHECK:STDOUT:       2:               inst60000164
-// CHECK:STDOUT:     inst_block60000082:
+// CHECK:STDOUT:     inst_block60000083:
 // CHECK:STDOUT:       0:               inst60000162
 // CHECK:STDOUT:       1:               inst60000163
 // CHECK:STDOUT:       2:               inst60000164
@@ -2152,44 +2153,44 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:       6:               inst60000168
 // CHECK:STDOUT:       7:               inst60000169
 // CHECK:STDOUT:       8:               inst6000016A
-// CHECK:STDOUT:     inst_block60000083:
+// CHECK:STDOUT:     inst_block60000084:
 // CHECK:STDOUT:       0:               inst60000162
 // CHECK:STDOUT:       1:               inst60000163
 // CHECK:STDOUT:       2:               inst60000164
-// CHECK:STDOUT:     inst_block60000084:
+// CHECK:STDOUT:     inst_block60000085:
 // CHECK:STDOUT:       0:               inst6000016B
 // CHECK:STDOUT:       1:               inst6000016C
-// CHECK:STDOUT:     inst_block60000085:
+// CHECK:STDOUT:     inst_block60000086:
 // CHECK:STDOUT:       0:               inst600000BF
 // CHECK:STDOUT:       1:               inst600000C0
 // CHECK:STDOUT:       2:               inst60000040
-// CHECK:STDOUT:     inst_block60000086:
-// CHECK:STDOUT:       0:               inst60000017
 // CHECK:STDOUT:     inst_block60000087:
-// CHECK:STDOUT:       0:               inst60000170
+// CHECK:STDOUT:       0:               inst60000017
 // CHECK:STDOUT:     inst_block60000088:
-// CHECK:STDOUT:       0:               inst60000172
+// CHECK:STDOUT:       0:               inst60000170
 // CHECK:STDOUT:     inst_block60000089:
 // CHECK:STDOUT:       0:               inst60000172
+// CHECK:STDOUT:     inst_block6000008A:
+// CHECK:STDOUT:       0:               inst60000172
 // CHECK:STDOUT:       1:               inst60000173
 // CHECK:STDOUT:       2:               inst60000174
-// CHECK:STDOUT:     inst_block6000008A:
-// CHECK:STDOUT:       0:               inst60000171
 // CHECK:STDOUT:     inst_block6000008B:
-// CHECK:STDOUT:       0:               inst60000178
+// CHECK:STDOUT:       0:               inst60000171
 // CHECK:STDOUT:     inst_block6000008C:
+// CHECK:STDOUT:       0:               inst60000178
+// CHECK:STDOUT:     inst_block6000008D:
 // CHECK:STDOUT:       0:               inst60000172
 // CHECK:STDOUT:       1:               inst6000001C
 // CHECK:STDOUT:       2:               inst6000001F
 // CHECK:STDOUT:       3:               inst600000C5
-// CHECK:STDOUT:     inst_block6000008D:
-// CHECK:STDOUT:       0:               inst60000178
 // CHECK:STDOUT:     inst_block6000008E:
-// CHECK:STDOUT:       0:               inst60000046
+// CHECK:STDOUT:       0:               inst60000178
 // CHECK:STDOUT:     inst_block6000008F:
+// CHECK:STDOUT:       0:               inst60000046
+// CHECK:STDOUT:     inst_block60000090:
 // CHECK:STDOUT:       0:               inst60000183
 // CHECK:STDOUT:       1:               inst60000186
-// CHECK:STDOUT:     inst_block60000090:
+// CHECK:STDOUT:     inst_block60000091:
 // CHECK:STDOUT:       0:               inst60000041
 // CHECK:STDOUT:       1:               inst60000045
 // CHECK:STDOUT:       2:               inst6000016F
@@ -2199,7 +2200,7 @@ fn Foo[T:! type](p: T*) -> (T*, ()) {
 // CHECK:STDOUT:       6:               inst6000017A
 // CHECK:STDOUT:       7:               inst6000017B
 // CHECK:STDOUT:       8:               inst6000017F
-// CHECK:STDOUT:     inst_block60000091:
+// CHECK:STDOUT:     inst_block60000092:
 // CHECK:STDOUT:       0:               instF
 // CHECK:STDOUT:       1:               inst60000010
 // CHECK:STDOUT:       2:               inst6000003C
diff --git a/toolchain/check/testdata/basics/raw_sem_ir/one_file_with_textual_ir.carbon b/toolchain/check/testdata/basics/raw_sem_ir/one_file_with_textual_ir.carbon
index 5ec7b77647ba..6f707cdd3bf5 100644
--- a/toolchain/check/testdata/basics/raw_sem_ir/one_file_with_textual_ir.carbon
+++ b/toolchain/check/testdata/basics/raw_sem_ir/one_file_with_textual_ir.carbon
@@ -34,7 +34,7 @@ fn Foo(n: ()) -> ((), ()) {
 // CHECK:STDOUT:     entity_name60000000: {name: name1, parent_scope: name_scope<none>, index: -1, is_template: 0, is_unused: 0}
 // CHECK:STDOUT:   cpp_global_vars: {}
 // CHECK:STDOUT:   functions:
-// CHECK:STDOUT:     function60000000: {name: name0, parent_scope: name_scope0, call_param_patterns_id: inst_block6000000B, call_params_id: inst_block6000000C, return_type_inst_id: inst60000020, return_form_inst_id: inst60000021, return_patterns_id: inst_block6000000A, body: [inst_block6000000F]}
+// CHECK:STDOUT:     function60000000: {name: name0, parent_scope: name_scope0, call_param_patterns_id: inst_block6000000C, call_params_id: inst_block6000000D, return_type_inst_id: inst60000020, return_form_inst_id: inst60000021, return_patterns_id: inst_block6000000B, body: [inst_block60000010]}
 // CHECK:STDOUT:   classes:         {}
 // CHECK:STDOUT:   interfaces:      {}
 // CHECK:STDOUT:   associated_constants: {}
@@ -74,9 +74,9 @@ fn Foo(n: ()) -> ((), ()) {
 // CHECK:STDOUT:     inst60000017:    {kind: ValueParamPattern, arg0: inst60000016, arg1: call_param0, type: type(inst60000015)}
 // CHECK:STDOUT:     inst60000018:    {kind: TupleLiteral, arg0: inst_block_empty, type: type(inst60000010)}
 // CHECK:STDOUT:     inst60000019:    {kind: TupleLiteral, arg0: inst_block_empty, type: type(inst60000010)}
-// CHECK:STDOUT:     inst6000001A:    {kind: TupleType, arg0: inst_block60000007, type: type(TypeType)}
-// CHECK:STDOUT:     inst6000001B:    {kind: TupleLiteral, arg0: inst_block60000006, type: type(inst6000001A)}
-// CHECK:STDOUT:     inst6000001C:    {kind: TupleValue, arg0: inst_block60000008, type: type(inst6000001A)}
+// CHECK:STDOUT:     inst6000001A:    {kind: TupleType, arg0: inst_block60000008, type: type(TypeType)}
+// CHECK:STDOUT:     inst6000001B:    {kind: TupleLiteral, arg0: inst_block60000007, type: type(inst6000001A)}
+// CHECK:STDOUT:     inst6000001C:    {kind: TupleValue, arg0: inst_block60000009, type: type(inst6000001A)}
 // CHECK:STDOUT:     inst6000001D:    {kind: PointerType, arg0: inst6000001A, type: type(TypeType)}
 // CHECK:STDOUT:     inst6000001E:    {kind: Converted, arg0: inst60000012, arg1: inst60000010, type: type(TypeType)}
 // CHECK:STDOUT:     inst6000001F:    {kind: Converted, arg0: inst60000012, arg1: inst60000010, type: type(TypeType)}
@@ -87,22 +87,22 @@ fn Foo(n: ()) -> ((), ()) {
 // CHECK:STDOUT:     inst60000024:    {kind: ReturnSlotPattern, arg0: inst60000020, type: type(inst60000023)}
 // CHECK:STDOUT:     inst60000025:    {kind: OutParamPattern, arg0: inst60000024, arg1: call_param1, type: type(inst60000023)}
 // CHECK:STDOUT:     inst60000026:    {kind: ValueParam, arg0: call_param0, arg1: name1, type: type(inst60000010)}
-// CHECK:STDOUT:     inst60000027:    {kind: SpliceBlock, arg0: inst_block60000004, arg1: inst60000013, type: type(TypeType)}
+// CHECK:STDOUT:     inst60000027:    {kind: SpliceBlock, arg0: inst_block60000005, arg1: inst60000013, type: type(TypeType)}
 // CHECK:STDOUT:     inst60000028:    {kind: OutParam, arg0: call_param1, arg1: name(ReturnSlot), type: type(inst6000001A)}
 // CHECK:STDOUT:     inst60000029:    {kind: ReturnSlot, arg0: inst6000001A, arg1: inst60000028, type: type(inst6000001A)}
-// CHECK:STDOUT:     inst6000002A:    {kind: FunctionDecl, arg0: function60000000, arg1: inst_block6000000E, type: type(inst6000002B)}
+// CHECK:STDOUT:     inst6000002A:    {kind: FunctionDecl, arg0: function60000000, arg1: inst_block6000000F, type: type(inst6000002B)}
 // CHECK:STDOUT:     inst6000002B:    {kind: FunctionType, arg0: function60000000, arg1: specific<none>, type: type(TypeType)}
 // CHECK:STDOUT:     inst6000002C:    {kind: StructValue, arg0: inst_block_empty, type: type(inst6000002B)}
 // CHECK:STDOUT:     inst6000002D:    {kind: NameRef, arg0: name1, arg1: inst60000014, type: type(inst60000010)}
 // CHECK:STDOUT:     inst6000002E:    {kind: TupleLiteral, arg0: inst_block_empty, type: type(inst60000010)}
-// CHECK:STDOUT:     inst6000002F:    {kind: TupleLiteral, arg0: inst_block60000010, type: type(inst6000001A)}
+// CHECK:STDOUT:     inst6000002F:    {kind: TupleLiteral, arg0: inst_block60000011, type: type(inst6000001A)}
 // CHECK:STDOUT:     inst60000030:    {kind: TupleAccess, arg0: inst60000028, arg1: element0, type: type(inst60000010)}
-// CHECK:STDOUT:     inst60000031:    {kind: TupleInit, arg0: inst_block60000011, arg1: inst<none>, type: type(inst60000010)}
+// CHECK:STDOUT:     inst60000031:    {kind: TupleInit, arg0: inst_block60000012, arg1: inst<none>, type: type(inst60000010)}
 // CHECK:STDOUT:     inst60000032:    {kind: Converted, arg0: inst6000002D, arg1: inst60000031, type: type(inst60000010)}
 // CHECK:STDOUT:     inst60000033:    {kind: TupleAccess, arg0: inst60000028, arg1: element1, type: type(inst60000010)}
 // CHECK:STDOUT:     inst60000034:    {kind: TupleInit, arg0: inst_block_empty, arg1: inst<none>, type: type(inst60000010)}
 // CHECK:STDOUT:     inst60000035:    {kind: Converted, arg0: inst6000002E, arg1: inst60000034, type: type(inst60000010)}
-// CHECK:STDOUT:     inst60000036:    {kind: TupleInit, arg0: inst_block60000012, arg1: inst60000028, type: type(inst6000001A)}
+// CHECK:STDOUT:     inst60000036:    {kind: TupleInit, arg0: inst_block60000013, arg1: inst60000028, type: type(inst6000001A)}
 // CHECK:STDOUT:     inst60000037:    {kind: Converted, arg0: inst6000002F, arg1: inst60000036, type: type(inst6000001A)}
 // CHECK:STDOUT:     inst60000038:    {kind: ReturnExpr, arg0: inst60000037, arg1: inst60000028}
 // CHECK:STDOUT:   constant_values:
@@ -145,39 +145,40 @@ fn Foo(n: ()) -> ((), ()) {
 // CHECK:STDOUT:     inst_block_empty: {}
 // CHECK:STDOUT:     exports:
 // CHECK:STDOUT:       0:               inst6000002A
+// CHECK:STDOUT:     generated:       {}
 // CHECK:STDOUT:     imports:         {}
 // CHECK:STDOUT:     global_init:     {}
-// CHECK:STDOUT:     inst_block60000004:
+// CHECK:STDOUT:     inst_block60000005:
 // CHECK:STDOUT:       0:               inst60000011
 // CHECK:STDOUT:       1:               inst60000013
-// CHECK:STDOUT:     inst_block60000005:
-// CHECK:STDOUT:       0:               inst60000017
 // CHECK:STDOUT:     inst_block60000006:
+// CHECK:STDOUT:       0:               inst60000017
+// CHECK:STDOUT:     inst_block60000007:
 // CHECK:STDOUT:       0:               inst60000018
 // CHECK:STDOUT:       1:               inst60000019
-// CHECK:STDOUT:     inst_block60000007:
+// CHECK:STDOUT:     inst_block60000008:
 // CHECK:STDOUT:       0:               inst60000010
 // CHECK:STDOUT:       1:               inst60000010
-// CHECK:STDOUT:     inst_block60000008:
+// CHECK:STDOUT:     inst_block60000009:
 // CHECK:STDOUT:       0:               inst60000012
 // CHECK:STDOUT:       1:               inst60000012
-// CHECK:STDOUT:     inst_block60000009:
+// CHECK:STDOUT:     inst_block6000000A:
 // CHECK:STDOUT:       0:               inst6000001E
 // CHECK:STDOUT:       1:               inst6000001F
-// CHECK:STDOUT:     inst_block6000000A:
-// CHECK:STDOUT:       0:               inst60000025
 // CHECK:STDOUT:     inst_block6000000B:
+// CHECK:STDOUT:       0:               inst60000025
+// CHECK:STDOUT:     inst_block6000000C:
 // CHECK:STDOUT:       0:               inst60000017
 // CHECK:STDOUT:       1:               inst60000025
-// CHECK:STDOUT:     inst_block6000000C:
+// CHECK:STDOUT:     inst_block6000000D:
 // CHECK:STDOUT:       0:               inst60000026
 // CHECK:STDOUT:       1:               inst60000028
-// CHECK:STDOUT:     inst_block6000000D:
+// CHECK:STDOUT:     inst_block6000000E:
 // CHECK:STDOUT:       0:               inst60000016
 // CHECK:STDOUT:       1:               inst60000017
 // CHECK:STDOUT:       2:               inst60000024
 // CHECK:STDOUT:       3:               inst60000025
-// CHECK:STDOUT:     inst_block6000000E:
+// CHECK:STDOUT:     inst_block6000000F:
 // CHECK:STDOUT:       0:               inst60000018
 // CHECK:STDOUT:       1:               inst60000019
 // CHECK:STDOUT:       2:               inst6000001B
@@ -190,7 +191,7 @@ fn Foo(n: ()) -> ((), ()) {
 // CHECK:STDOUT:       9:               inst60000014
 // CHECK:STDOUT:       10:              inst60000028
 // CHECK:STDOUT:       11:              inst60000029
-// CHECK:STDOUT:     inst_block6000000F:
+// CHECK:STDOUT:     inst_block60000010:
 // CHECK:STDOUT:       0:               inst6000002D
 // CHECK:STDOUT:       1:               inst6000002E
 // CHECK:STDOUT:       2:               inst6000002F
@@ -203,14 +204,14 @@ fn Foo(n: ()) -> ((), ()) {
 // CHECK:STDOUT:       9:               inst60000036
 // CHECK:STDOUT:       10:              inst60000037
 // CHECK:STDOUT:       11:              inst60000038
-// CHECK:STDOUT:     inst_block60000010:
+// CHECK:STDOUT:     inst_block60000011:
 // CHECK:STDOUT:       0:               inst6000002D
 // CHECK:STDOUT:       1:               inst6000002E
-// CHECK:STDOUT:     inst_block60000011: {}
-// CHECK:STDOUT:     inst_block60000012:
+// CHECK:STDOUT:     inst_block60000012: {}
+// CHECK:STDOUT:     inst_block60000013:
 // CHECK:STDOUT:       0:               inst60000032
 // CHECK:STDOUT:       1:               inst60000035
-// CHECK:STDOUT:     inst_block60000013:
+// CHECK:STDOUT:     inst_block60000014:
 // CHECK:STDOUT:       0:               instF
 // CHECK:STDOUT:       1:               inst6000002A
 // CHECK:STDOUT:   value_stores:
diff --git a/toolchain/check/testdata/eval/call.carbon b/toolchain/check/testdata/eval/call.carbon
index 0aaf3554eb2f..8de0af5cb953 100644
--- a/toolchain/check/testdata/eval/call.carbon
+++ b/toolchain/check/testdata/eval/call.carbon
@@ -99,7 +99,7 @@ fn UseFGenerically(X:! i32) {
   // CHECK:STDERR:   var unused v: F(X) = {};
   // CHECK:STDERR:   ^~~~~~~~~~~~~~~~~~
   // CHECK:STDERR:
-  // CHECK:STDERR: fail_todo_dependent_call_type.carbon:[[@LINE+4]]:3: error: cannot access member of interface `Core.Destroy` in type `<cannot stringify inst7800018D: {kind: Call, arg0: inst7800003F, arg1: inst_block78000090, type: type(TypeType)}>` that does not implement that interface [MissingImplInMemberAccess]
+  // CHECK:STDERR: fail_todo_dependent_call_type.carbon:[[@LINE+4]]:3: error: cannot access member of interface `Core.Destroy` in type `<cannot stringify inst7800018D: {kind: Call, arg0: inst7800003F, arg1: inst_block78000091, type: type(TypeType)}>` that does not implement that interface [MissingImplInMemberAccess]
   // CHECK:STDERR:   var unused v: F(X) = {};
   // CHECK:STDERR:   ^~~~~~~~~~~~~~~~~~
   // CHECK:STDERR:
diff --git a/toolchain/check/testdata/interop/cpp/stdlib/initializer_list.carbon b/toolchain/check/testdata/interop/cpp/stdlib/initializer_list.carbon
index b889fde6c522..a505f9694e6a 100644
--- a/toolchain/check/testdata/interop/cpp/stdlib/initializer_list.carbon
+++ b/toolchain/check/testdata/interop/cpp/stdlib/initializer_list.carbon
@@ -128,6 +128,23 @@ fn F() {
 // CHECK:STDOUT:     import Cpp//...
 // CHECK:STDOUT:   }
 // CHECK:STDOUT:   %initializer_list.template: %initializer_list.type = struct_value () [concrete = constants.%initializer_list.template]
+// CHECK:STDOUT:   %Core.import_ref.42d: @Core.IntLiteral.as.ImplicitAs.impl.%Core.IntLiteral.as.ImplicitAs.impl.Convert.type (%Core.IntLiteral.as.ImplicitAs.impl.Convert.type.4e6) = import_ref Core//prelude/types/int, loc{{\d+_\d+}}, loaded [symbolic = @Core.IntLiteral.as.ImplicitAs.impl.%Core.IntLiteral.as.ImplicitAs.impl.Convert (constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.3c2)]
+// CHECK:STDOUT:   %ImplicitAs.impl_witness_table.74f = impl_witness_table (%Core.import_ref.42d), @Core.IntLiteral.as.ImplicitAs.impl [concrete]
+// CHECK:STDOUT:   %Consume.cpp_overload_set.value: %Consume.cpp_overload_set.type = cpp_overload_set_value @Consume.cpp_overload_set [concrete = constants.%Consume.cpp_overload_set.value]
+// CHECK:STDOUT:   %Consume__carbon_thunk.decl: %Consume__carbon_thunk.type = fn_decl @Consume__carbon_thunk [concrete = constants.%Consume__carbon_thunk] {
+// CHECK:STDOUT:     <elided>
+// CHECK:STDOUT:   } {
+// CHECK:STDOUT:     <elided>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %InitListConstructor.decl: type = class_decl @InitListConstructor [concrete = constants.%InitListConstructor] {} {}
+// CHECK:STDOUT:   %InitListConstructor__carbon_thunk.decl: %InitListConstructor__carbon_thunk.type = fn_decl @InitListConstructor__carbon_thunk [concrete = constants.%InitListConstructor__carbon_thunk] {
+// CHECK:STDOUT:     <elided>
+// CHECK:STDOUT:   } {
+// CHECK:STDOUT:     <elided>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: generated {
 // CHECK:STDOUT:   %initializer_list.initializer_list.decl.2bdc3e.1: %initializer_list.initializer_list.type.9fcb7f.1 = fn_decl @initializer_list.initializer_list.loc8 [concrete = constants.%initializer_list.initializer_list.643507.1] {
 // CHECK:STDOUT:     %_.patt: %pattern_type.5d8 = value_binding_pattern _ [concrete]
 // CHECK:STDOUT:     %_.param_patt: %pattern_type.5d8 = value_param_pattern %_.patt, call_param0 [concrete]
@@ -140,14 +157,6 @@ fn F() {
 // CHECK:STDOUT:     %return.param: ref %initializer_list = out_param call_param1
 // CHECK:STDOUT:     %return: ref %initializer_list = return_slot %return.param
 // CHECK:STDOUT:   }
-// CHECK:STDOUT:   %Core.import_ref.42d: @Core.IntLiteral.as.ImplicitAs.impl.%Core.IntLiteral.as.ImplicitAs.impl.Convert.type (%Core.IntLiteral.as.ImplicitAs.impl.Convert.type.4e6) = import_ref Core//prelude/types/int, loc{{\d+_\d+}}, loaded [symbolic = @Core.IntLiteral.as.ImplicitAs.impl.%Core.IntLiteral.as.ImplicitAs.impl.Convert (constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.3c2)]
-// CHECK:STDOUT:   %ImplicitAs.impl_witness_table.74f = impl_witness_table (%Core.import_ref.42d), @Core.IntLiteral.as.ImplicitAs.impl [concrete]
-// CHECK:STDOUT:   %Consume.cpp_overload_set.value: %Consume.cpp_overload_set.type = cpp_overload_set_value @Consume.cpp_overload_set [concrete = constants.%Consume.cpp_overload_set.value]
-// CHECK:STDOUT:   %Consume__carbon_thunk.decl: %Consume__carbon_thunk.type = fn_decl @Consume__carbon_thunk [concrete = constants.%Consume__carbon_thunk] {
-// CHECK:STDOUT:     <elided>
-// CHECK:STDOUT:   } {
-// CHECK:STDOUT:     <elided>
-// CHECK:STDOUT:   }
 // CHECK:STDOUT:   %initializer_list.initializer_list.decl.2bdc3e.2: %initializer_list.initializer_list.type.9fcb7f.2 = fn_decl @initializer_list.initializer_list.loc10 [concrete = constants.%initializer_list.initializer_list.643507.2] {
 // CHECK:STDOUT:     %_.patt: %pattern_type.5d8 = value_binding_pattern _ [concrete]
 // CHECK:STDOUT:     %_.param_patt: %pattern_type.5d8 = value_param_pattern %_.patt, call_param0 [concrete]
@@ -160,12 +169,6 @@ fn F() {
 // CHECK:STDOUT:     %return.param: ref %initializer_list = out_param call_param1
 // CHECK:STDOUT:     %return: ref %initializer_list = return_slot %return.param
 // CHECK:STDOUT:   }
-// CHECK:STDOUT:   %InitListConstructor.decl: type = class_decl @InitListConstructor [concrete = constants.%InitListConstructor] {} {}
-// CHECK:STDOUT:   %InitListConstructor__carbon_thunk.decl: %InitListConstructor__carbon_thunk.type = fn_decl @InitListConstructor__carbon_thunk [concrete = constants.%InitListConstructor__carbon_thunk] {
-// CHECK:STDOUT:     <elided>
-// CHECK:STDOUT:   } {
-// CHECK:STDOUT:     <elided>
-// CHECK:STDOUT:   }
 // CHECK:STDOUT:   %initializer_list.initializer_list.decl.2bdc3e.3: %initializer_list.initializer_list.type.9fcb7f.3 = fn_decl @initializer_list.initializer_list.loc12 [concrete = constants.%initializer_list.initializer_list.643507.3] {
 // CHECK:STDOUT:     %_.patt: %pattern_type.5d8 = value_binding_pattern _ [concrete]
 // CHECK:STDOUT:     %_.param_patt: %pattern_type.5d8 = value_param_pattern %_.patt, call_param0 [concrete]
@@ -229,7 +232,7 @@ fn F() {
 // CHECK:STDOUT:   %.loc8_50.14: init %array_type = converted %.loc8_50.1, %.loc8_50.13 [concrete = constants.%array]
 // CHECK:STDOUT:   %.loc8_50.15: ref %array_type = temporary %.loc8_50.4, %.loc8_50.14
 // CHECK:STDOUT:   %.loc8_50.16: %array_type = acquire_value %.loc8_50.15
-// CHECK:STDOUT:   %initializer_list.initializer_list.call.loc8: init %initializer_list to %.loc8_50.2 = call imports.%initializer_list.initializer_list.decl.2bdc3e.1(%.loc8_50.16)
+// CHECK:STDOUT:   %initializer_list.initializer_list.call.loc8: init %initializer_list to %.loc8_50.2 = call generated.%initializer_list.initializer_list.decl.2bdc3e.1(%.loc8_50.16)
 // CHECK:STDOUT:   %.loc8_50.17: init %initializer_list = converted %.loc8_50.1, %initializer_list.initializer_list.call.loc8
 // CHECK:STDOUT:   %.loc8_50.18: ref %initializer_list = temporary %.loc8_50.2, %.loc8_50.17
 // CHECK:STDOUT:   %.loc8_50.19: %initializer_list = acquire_value %.loc8_50.18
@@ -276,7 +279,7 @@ fn F() {
 // CHECK:STDOUT:   %.loc10_23.14: init %array_type = converted %.loc10_23.1, %.loc10_23.13 [concrete = constants.%array]
 // CHECK:STDOUT:   %.loc10_23.15: ref %array_type = temporary %.loc10_23.4, %.loc10_23.14
 // CHECK:STDOUT:   %.loc10_23.16: %array_type = acquire_value %.loc10_23.15
-// CHECK:STDOUT:   %initializer_list.initializer_list.call.loc10: init %initializer_list to %.loc10_23.2 = call imports.%initializer_list.initializer_list.decl.2bdc3e.2(%.loc10_23.16)
+// CHECK:STDOUT:   %initializer_list.initializer_list.call.loc10: init %initializer_list to %.loc10_23.2 = call generated.%initializer_list.initializer_list.decl.2bdc3e.2(%.loc10_23.16)
 // CHECK:STDOUT:   %.loc10_23.17: init %initializer_list = converted %.loc10_23.1, %initializer_list.initializer_list.call.loc10
 // CHECK:STDOUT:   %.loc10_23.18: ref %initializer_list = temporary %.loc10_23.2, %.loc10_23.17
 // CHECK:STDOUT:   %.loc10_23.19: %initializer_list = acquire_value %.loc10_23.18
@@ -331,7 +334,7 @@ fn F() {
 // CHECK:STDOUT:   %.loc12_44.15: init %array_type = converted %.loc12_44.1, %.loc12_44.14 [concrete = constants.%array]
 // CHECK:STDOUT:   %.loc12_44.16: ref %array_type = temporary %.loc12_44.5, %.loc12_44.15
 // CHECK:STDOUT:   %.loc12_44.17: %array_type = acquire_value %.loc12_44.16
-// CHECK:STDOUT:   %initializer_list.initializer_list.call.loc12: init %initializer_list to %.loc12_44.3 = call imports.%initializer_list.initializer_list.decl.2bdc3e.3(%.loc12_44.17)
+// CHECK:STDOUT:   %initializer_list.initializer_list.call.loc12: init %initializer_list to %.loc12_44.3 = call generated.%initializer_list.initializer_list.decl.2bdc3e.3(%.loc12_44.17)
 // CHECK:STDOUT:   %.loc12_44.18: init %initializer_list = converted %.loc12_44.1, %initializer_list.initializer_list.call.loc12
 // CHECK:STDOUT:   %.loc12_44.19: ref %initializer_list = temporary %.loc12_44.3, %.loc12_44.18
 // CHECK:STDOUT:   %.loc12_44.20: %initializer_list = acquire_value %.loc12_44.19
diff --git a/toolchain/driver/testdata/stdin.carbon b/toolchain/driver/testdata/stdin.carbon
index d7733a47d0cd..e16a8f07cc80 100644
--- a/toolchain/driver/testdata/stdin.carbon
+++ b/toolchain/driver/testdata/stdin.carbon
@@ -65,9 +65,10 @@
 // CHECK:STDOUT:   inst_blocks:
 // CHECK:STDOUT:     inst_block_empty: {}
 // CHECK:STDOUT:     exports:         {}
+// CHECK:STDOUT:     generated:       {}
 // CHECK:STDOUT:     imports:         {}
 // CHECK:STDOUT:     global_init:     {}
-// CHECK:STDOUT:     inst_block60000004:
+// CHECK:STDOUT:     inst_block60000005:
 // CHECK:STDOUT:       0:               instF
 // CHECK:STDOUT:   value_stores:
 // CHECK:STDOUT:     shared_values:
diff --git a/toolchain/sem_ir/formatter.cpp b/toolchain/sem_ir/formatter.cpp
index c49efb2dd6f8..ba032a1e5ac3 100644
--- a/toolchain/sem_ir/formatter.cpp
+++ b/toolchain/sem_ir/formatter.cpp
@@ -35,13 +35,19 @@
 
 namespace Carbon::SemIR {
 
+using TentativeScopeArray =
+    std::array<std::pair<InstNamer::ScopeId, llvm::ArrayRef<InstId>>,
+               static_cast<size_t>(InstNamer::ScopeId::FirstEntityScope) - 1>;
+
 // Returns blocks for the tentative scopes.
 static auto GetTentativeScopes(const SemIR::File& sem_ir)
-    -> std::array<std::pair<InstNamer::ScopeId, llvm::ArrayRef<InstId>>, 2> {
-  return std::array<std::pair<InstNamer::ScopeId, llvm::ArrayRef<InstId>>, 2>({
+    -> TentativeScopeArray {
+  return TentativeScopeArray({
       {InstNamer::ScopeId::Constants, sem_ir.constants().array_ref()},
       {InstNamer::ScopeId::Imports,
        sem_ir.inst_blocks().Get(InstBlockId::Imports)},
+      {InstNamer::ScopeId::Generated,
+       sem_ir.inst_blocks().Get(InstBlockId::Generated)},
   });
 }
 
diff --git a/toolchain/sem_ir/formatter.h b/toolchain/sem_ir/formatter.h
index e8b5527bd67d..4a3db5a9e2f5 100644
--- a/toolchain/sem_ir/formatter.h
+++ b/toolchain/sem_ir/formatter.h
@@ -29,24 +29,28 @@ class Formatter {
 
   // Prints the SemIR into an internal buffer. Must only be called once.
   //
-  // We first print top-level scopes (constants, imports, and file) then
-  // entities (types and functions). The ordering is based on references:
+  // We first print top-level scopes (`constants`, `imports`, `generated`, and
+  // `file`) then entities (types and functions). The ordering is based on
+  // references:
   //
-  // - constants can have internal references.
-  // - imports can refer to constants.
-  // - file can refer to constants and imports, and also entities.
+  // - `constants` is self-contained.
+  // - `imports` can refer to `constants`.
+  // - `generated` can refer to both of the above.
+  // - `file` can refer to any of the above, and also entities.
   // - Entities are difficult to order (forward declarations may lead to
   //   circular references), and so are simply grouped by type.
   //
-  // When formatting constants and imports, we use `FormatterChunks` to only
-  // print entities which are referenced. For example, imports speculatively
+  // When formatting scopes other than `file`, we use `FormatterChunks` to only
+  // print entities which are referenced. For example, `imports` speculatively
   // create constants which may never be referenced, or for which the
-  // referencing instruction may be hidden and we normally hide those. See
-  // `FormatterChunks` for additional information.
+  // referencing instruction may be hidden and we normally hide those; those are
+  // excluded from the `constants` scope output. See `FormatterChunks` for
+  // additional information.
   //
-  // Beyond `FormatterChunks`, `ShouldFormatEntity` and `ShouldFormatInst` can
-  // also hide instructions. These interact because an hidden instruction means
-  // its references are unused for `FormatterChunks` visibility.
+  // Beyond the reference-based printing, `ShouldFormatEntity` and
+  // `ShouldFormatInst` can also hide instructions. These interact because an
+  // hidden instruction means its references are unused for `FormatterChunks`
+  // visibility.
   auto Format() -> void;
 
   // Write buffered output to the given stream. `Format` must be called first.
diff --git a/toolchain/sem_ir/ids.cpp b/toolchain/sem_ir/ids.cpp
index 6326247b5d87..22e9edf10a2b 100644
--- a/toolchain/sem_ir/ids.cpp
+++ b/toolchain/sem_ir/ids.cpp
@@ -202,6 +202,8 @@ auto InstBlockId::Print(llvm::raw_ostream& out) const -> void {
     out << Label << "_empty";
   } else if (*this == Exports) {
     out << "exports";
+  } else if (*this == Generated) {
+    out << "generated";
   } else if (*this == Imports) {
     out << "imports";
   } else if (*this == GlobalInit) {
diff --git a/toolchain/sem_ir/ids.h b/toolchain/sem_ir/ids.h
index c78dc77a4014..d3402cc2aee8 100644
--- a/toolchain/sem_ir/ids.h
+++ b/toolchain/sem_ir/ids.h
@@ -712,12 +712,22 @@ struct InstBlockId : public IdBase<InstBlockId> {
   // the 0-index block.
   static const InstBlockId Empty;
 
-  // Exported instructions. Empty until the File is fully checked; intermediate
-  // state is in the Check::Context.
+  // Exported instructions.
+  //
+  // Empty until the File is fully checked; intermediate state is in the
+  // Check::Context.
   static const InstBlockId Exports;
 
-  // Instructions produced through import logic. Empty until the File is fully
-  // checked; intermediate state is in the Check::Context.
+  // Generated entities.
+  //
+  // Empty until the File is fully checked; intermediate state is in the
+  // Check::Context.
+  static const InstBlockId Generated;
+
+  // Instructions produced through import logic.
+  //
+  // Empty until the File is fully checked; intermediate state is in the
+  // Check::Context.
   static const InstBlockId Imports;
 
   // Global declaration initialization instructions. Empty if none are present.
@@ -725,6 +735,9 @@ struct InstBlockId : public IdBase<InstBlockId> {
   // be inserted into it.
   static const InstBlockId GlobalInit;
 
+  // A convenience list of reserved IDs.
+  static const std::array<InstBlockId, 5> ReservedIds;
+
   // An ID for unreachable code.
   static const InstBlockId Unreachable;
 
@@ -734,10 +747,13 @@ struct InstBlockId : public IdBase<InstBlockId> {
 
 inline constexpr InstBlockId InstBlockId::Empty = InstBlockId(0);
 inline constexpr InstBlockId InstBlockId::Exports = InstBlockId(1);
-inline constexpr InstBlockId InstBlockId::Imports = InstBlockId(2);
-inline constexpr InstBlockId InstBlockId::GlobalInit = InstBlockId(3);
+inline constexpr InstBlockId InstBlockId::Generated = InstBlockId(2);
+inline constexpr InstBlockId InstBlockId::Imports = InstBlockId(3);
+inline constexpr InstBlockId InstBlockId::GlobalInit = InstBlockId(4);
 inline constexpr InstBlockId InstBlockId::Unreachable =
     InstBlockId(NoneIndex - 1);
+inline constexpr std::array<InstBlockId, 5> InstBlockId::ReservedIds = {
+    Empty, Exports, Generated, Imports, GlobalInit};
 
 // Contains either an `InstBlockId` value, an error value, or
 // `InstBlockId::None`.
diff --git a/toolchain/sem_ir/inst.h b/toolchain/sem_ir/inst.h
index 8f9ce37600e8..2f0c500f6e1e 100644
--- a/toolchain/sem_ir/inst.h
+++ b/toolchain/sem_ir/inst.h
@@ -699,15 +699,16 @@ class InstBlockStore
 
   explicit InstBlockStore(llvm::BumpPtrAllocator& allocator,
                           CheckIRId check_ir_id = CheckIRId::None)
-      // 4 reserved ids for the
-      // `InstBlockId::{Empty,Exports,Imports,GlobalInit}` global ids.
-      : BaseType(allocator, check_ir_id, 4) {
-    auto exports_id = AddPlaceholder();
-    CARBON_CHECK(exports_id == InstBlockId::Exports);
-    auto imports_id = AddPlaceholder();
-    CARBON_CHECK(imports_id == InstBlockId::Imports);
-    auto global_init_id = AddPlaceholder();
-    CARBON_CHECK(global_init_id == InstBlockId::GlobalInit);
+      : BaseType(allocator, check_ir_id, InstBlockId::ReservedIds.size()) {
+    CARBON_CHECK(size() == 1, "Empty is added by `BlockValueStore`");
+    for (auto reserved_id : InstBlockId::ReservedIds) {
+      if (reserved_id == InstBlockId::Empty) {
+        continue;
+      }
+      auto id = AddPlaceholder();
+      CARBON_CHECK(id == reserved_id);
+    }
+    CARBON_CHECK(size() == InstBlockId::ReservedIds.size());
   }
 
   // Adds an uninitialized block of the given size. The caller is expected to
diff --git a/toolchain/sem_ir/inst_namer.cpp b/toolchain/sem_ir/inst_namer.cpp
index 91c42e7fe7b5..cb98494239d0 100644
--- a/toolchain/sem_ir/inst_namer.cpp
+++ b/toolchain/sem_ir/inst_namer.cpp
@@ -130,6 +130,9 @@ InstNamer::InstNamer(const File* sem_ir, int total_ir_count)
   PushBlockId(ScopeId::Imports, InstBlockId::Imports);
   process_stack();
 
+  PushBlockId(ScopeId::Generated, InstBlockId::Generated);
+  process_stack();
+
   PushBlockId(ScopeId::File, sem_ir->top_inst_block_id());
   process_stack();
 
@@ -207,6 +210,8 @@ auto InstNamer::GetScopeName(ScopeId scope) const -> std::string {
     // These are treated as SemIR keywords.
     case ScopeId::File:
       return "file";
+    case ScopeId::Generated:
+      return "generated";
     case ScopeId::Imports:
       return "imports";
     case ScopeId::Constants:
@@ -785,7 +790,8 @@ auto InstNamer::NamingContext::AddInstName(std::string name) -> void {
   ScopeId old_scope_id = inst_namer_->insts_[index].first;
   if (old_scope_id == ScopeId::None) {
     std::variant<LocId, uint64_t> loc_id_or_fingerprint = LocId::None;
-    if (scope_id_ == ScopeId::Constants || scope_id_ == ScopeId::Imports) {
+    if (scope_id_ == ScopeId::Constants || scope_id_ == ScopeId::Generated ||
+        scope_id_ == ScopeId::Imports) {
       loc_id_or_fingerprint =
           inst_namer_->fingerprinter_.GetOrCompute(&sem_ir(), inst_id_);
     } else {
diff --git a/toolchain/sem_ir/inst_namer.h b/toolchain/sem_ir/inst_namer.h
index db852d1f462e..97c81187aa7f 100644
--- a/toolchain/sem_ir/inst_namer.h
+++ b/toolchain/sem_ir/inst_namer.h
@@ -27,12 +27,13 @@ class InstNamer {
   // int32_t matches the input value size.
   enum class ScopeId : int32_t {
     None = -1,
-    // The three top-level scopes.
+    // The top-level scopes.
     File = 0,
-    Imports = 1,
-    Constants = 2,
+    Generated = 1,
+    Imports = 2,
+    Constants = 3,
     // The first entity scope; see entities in `ScopeIdTypeEnum`.
-    FirstEntityScope = 3,
+    FirstEntityScope = 4,
   };
   static_assert(sizeof(ScopeId) == sizeof(AnyIdBase));
 
diff --git a/toolchain/sem_ir/yaml_test.cpp b/toolchain/sem_ir/yaml_test.cpp
index b0dfc84b578b..89659a19b2b5 100644
--- a/toolchain/sem_ir/yaml_test.cpp
+++ b/toolchain/sem_ir/yaml_test.cpp
@@ -46,9 +46,10 @@ TEST(SemIRTest, Yaml) {
 
   // Matches the ID of an instruction. Instruction counts may change as various
   // support changes, so this code is only doing loose structural checks.
+  auto inst_id = Yaml::Scalar(MatchesRegex(R"(inst[0-9A-F]+)"));
   auto inst_block_id =
       Yaml::Scalar(MatchesRegex(R"(inst_block([0-9A-F]+|_empty))"));
-  auto inst_id = Yaml::Scalar(MatchesRegex(R"(inst[0-9A-F]+)"));
+  auto inst_block = Pair(inst_block_id, Yaml::Mapping(Each(Pair(_, inst_id))));
   auto constant_id =
       Yaml::Scalar(MatchesRegex(R"(concrete_constant\(inst[0-9A-F]+\))"));
   auto type_id =
@@ -74,43 +75,41 @@ TEST(SemIRTest, Yaml) {
       Pair("struct_type_fields", Yaml::Mapping(SizeIs(1))),
       Pair("types", Yaml::Mapping(Each(type_builtin))),
       Pair("facet_types", Yaml::Mapping(SizeIs(0))),
-      Pair("insts", Yaml::Mapping(AllOf(
-                        Each(Key(inst_id)),
-                        // kind is required, other parts are optional.
-                        Each(Pair(_, Yaml::Mapping(Contains(Pair("kind", _))))),
-                        // A 0-arg instruction.
-                        Contains(Pair(_, Yaml::Mapping(ElementsAre(
-                                             Pair("kind", "Return"))))),
-                        // A 1-arg instruction.
-                        Contains(Pair(_, Yaml::Mapping(ElementsAre(
-                                             Pair("kind", "TupleType"),
-                                             Pair("arg0", inst_block_id),
-                                             Pair("type", "type(TypeType)"))))),
-                        // A 2-arg instruction.
-                        Contains(Pair(_, Yaml::Mapping(ElementsAre(
+      Pair("insts",
+           Yaml::Mapping(AllOf(
+               Each(Key(inst_id)),
+               // kind is required, other parts are optional.
+               Each(Pair(_, Yaml::Mapping(Contains(Pair("kind", _))))),
+               // A 0-arg instruction.
+               Contains(
+                   Pair(_, Yaml::Mapping(ElementsAre(Pair("kind", "Return"))))),
+               // A 1-arg instruction.
+               Contains(Pair(_, Yaml::Mapping(ElementsAre(
+                                    Pair("kind", "TupleType"),
+                                    Pair("arg0", inst_block_id),
+                                    Pair("type", "type(TypeType)"))))),
+               // A 2-arg instruction.
+               Contains(Pair(_, Yaml::Mapping(ElementsAre(
 
-                                             Pair("kind", "FunctionDecl"),
-                                             Pair("arg0", "function60000000"),
-                                             Pair("arg1", "inst_block_empty"),
-                                             Pair("type", type_id)))))))),
+                                    Pair("kind", "FunctionDecl"),
+                                    Pair("arg0", Yaml::Scalar(MatchesRegex(
+                                                     "function[0-9A-F]+"))),
+                                    Pair("arg1", "inst_block_empty"),
+                                    Pair("type", type_id)))))))),
       Pair("constant_values",
            Yaml::Mapping(ElementsAre(
                Pair("values",
                     Yaml::Mapping(AllOf(Each(Pair(inst_id, constant_id))))),
                Pair("symbolic_constants", Yaml::Mapping(SizeIs(0)))))),
-      Pair(
-          "inst_blocks",
-          Yaml::Mapping(ElementsAre(
-              Pair("inst_block_empty", Yaml::Mapping(IsEmpty())),
-              Pair("exports", Yaml::Mapping(Each(Pair(_, inst_id)))),
-              Pair("imports", Yaml::Mapping(IsEmpty())),
-              Pair("global_init", Yaml::Mapping(IsEmpty())),
-              Pair("inst_block60000004", Yaml::Mapping(Each(Pair(_, inst_id)))),
-              Pair("inst_block60000005", Yaml::Mapping(Each(Pair(_, inst_id)))),
-              Pair("inst_block60000006", Yaml::Mapping(Each(Pair(_, inst_id)))),
-              Pair("inst_block60000007", Yaml::Mapping(Each(Pair(_, inst_id)))),
-              Pair("inst_block60000008",
-                   Yaml::Mapping(Each(Pair(_, inst_id))))))),
+      Pair("inst_blocks",
+           Yaml::Mapping(ElementsAre(
+               Pair("inst_block_empty", Yaml::Mapping(IsEmpty())),
+               Pair("exports", Yaml::Mapping(Each(Pair(_, inst_id)))),
+               Pair("generated", Yaml::Mapping(IsEmpty())),
+               Pair("imports", Yaml::Mapping(IsEmpty())),
+               Pair("global_init", Yaml::Mapping(IsEmpty())),
+               // There are 5 non-reserved inst blocks.
+               inst_block, inst_block, inst_block, inst_block, inst_block))),
       Pair("value_stores",
            Yaml::Mapping(ElementsAre(
                Pair("shared_values",