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Add Destroy.SubobjectDestroy as a temporary replacement for Destroy.Op (#7773)

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This change partially implements [PR #7362], which revises how objects
are destroyed. It is a partial implementation for two reasons:

1. This change moves `Destroy.Op`'s current behaviour into
`Destroy.SubobjectDestroy`, but it doesn't add support for objects with
non-trivial destruction.
2. `Destroy.SubobjectDestroy` is a workaround for `require impls
SubobjectDestroy`. We aren't able to use the latter until the dependents
add their requirements' implementations to their own witness tables.

[PR #7362]: https://github.com/carbon-language/carbon-lang/pulls/7362
This commit is contained in:
Christopher Di Bella
2026-09-24 00:06:28 +00:00
committed by GitHub
parent 03939a9223
commit f7cd39428e
309 changed files with 51760 additions and 15269 deletions
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toolchain/check/testdata/interop/cpp/function/import/class.carbon
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+97 -6
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@@ -827,8 +827,14 @@ fn F() {
// CHECK:STDOUT: %Default.facet.9a6: %Default.type = facet_value %InNamespaceClass, (%custom_witness.85f) [concrete]
// CHECK:STDOUT: %DefaultOrUnformed.impl_witness.4fe: <witness> = impl_witness imports.%DefaultOrUnformed.impl_witness_table.162, @T.as_type.as.DefaultOrUnformed.impl(%Default.facet.9a6) [concrete]
// CHECK:STDOUT: %DefaultOrUnformed.facet: %DefaultOrUnformed.type = facet_value %InNamespaceClass, (%DefaultOrUnformed.impl_witness.4fe) [concrete]
// CHECK:STDOUT: %self.param_patt.5ba: %pattern_type.d8e = ref_param_pattern [concrete]
// CHECK:STDOUT: %self.patt.027: %pattern_type.d8e = wrapper_binding_pattern self, %self.param_patt.5ba [concrete]
// CHECK:STDOUT: %InNamespaceClass.cpp_destructor.type: type = fn_type @InNamespaceClass.cpp_destructor [concrete]
// CHECK:STDOUT: %InNamespaceClass.cpp_destructor: %InNamespaceClass.cpp_destructor.type = struct_value () [concrete]
// CHECK:STDOUT: %Destroy.WithSelf.Op.type.ef0: type = fn_type @Destroy.WithSelf.Op.loc10 [concrete]
// CHECK:STDOUT: %Destroy.WithSelf.Op.403: %Destroy.WithSelf.Op.type.ef0 = struct_value () [concrete]
// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.type.fbc: type = fn_type @Destroy.WithSelf.SelfDestruct.loc10 [concrete]
// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.db3: %Destroy.WithSelf.SelfDestruct.type.fbc = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
@@ -850,6 +856,21 @@ fn F() {
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import_ref.c2f: @T.as_type.as.DefaultOrUnformed.impl.%T.as_type.as.DefaultOrUnformed.impl.Op.type (%T.as_type.as.DefaultOrUnformed.impl.Op.type.0c9) = import_ref Core//prelude/parts/default, loc{{\d+_\d+}}, loaded [symbolic = @T.as_type.as.DefaultOrUnformed.impl.%T.as_type.as.DefaultOrUnformed.impl.Op (constants.%T.as_type.as.DefaultOrUnformed.impl.Op.cfe)]
// CHECK:STDOUT: %DefaultOrUnformed.impl_witness_table.162 = impl_witness_table (%Core.import_ref.c2f), @T.as_type.as.DefaultOrUnformed.impl [concrete]
// CHECK:STDOUT: %InNamespaceClass.cpp_destructor.decl: %InNamespaceClass.cpp_destructor.type = fn_decl @InNamespaceClass.cpp_destructor [concrete = constants.%InNamespaceClass.cpp_destructor] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: } {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generated {
// CHECK:STDOUT: %Destroy.WithSelf.Op.decl: %Destroy.WithSelf.Op.type.ef0 = fn_decl @Destroy.WithSelf.Op.loc10 [concrete = constants.%Destroy.WithSelf.Op.403] {
// CHECK:STDOUT: %self.param_patt: %pattern_type.d8e = ref_param_pattern [concrete = constants.%self.param_patt.5ba]
// CHECK:STDOUT: %self.patt: %pattern_type.d8e = wrapper_binding_pattern self, %self.param_patt [concrete = constants.%self.patt.027]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %self.param: ref %InNamespaceClass = ref_param call_param0
// CHECK:STDOUT: %self: ref %InNamespaceClass = wrapper_binding self, %self.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F(%c.param: %InNamespaceClass) {
@@ -879,11 +900,20 @@ fn F() {
// CHECK:STDOUT: %x.patt: %pattern_type.d8e = ref_binding_pattern x [concrete = constants.%x.patt]
// CHECK:STDOUT: %x.var_patt: %pattern_type.d8e = var_pattern %x.patt [concrete = constants.%x.var_patt]
// CHECK:STDOUT: }
// CHECK:STDOUT: %InNamespaceClass.cpp_destructor.bound: <bound method> = bound_method %x.var, constants.%InNamespaceClass.cpp_destructor
// CHECK:STDOUT: %InNamespaceClass.cpp_destructor.call: init %empty_tuple.type = call %InNamespaceClass.cpp_destructor.bound(%x.var)
// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.bound: <bound method> = bound_method %x.var, constants.%Destroy.WithSelf.SelfDestruct.db3
// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.call: init %empty_tuple.type = call %Destroy.WithSelf.SelfDestruct.bound(%x.var)
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Destroy.WithSelf.Op.loc10(%self.param: ref %InNamespaceClass) = "no_op";
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Destroy.WithSelf.SelfDestruct.loc10(%self.param: ref %InNamespaceClass) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Destroy.WithSelf.Op.call: init %empty_tuple.type = call generated.%Destroy.WithSelf.Op.decl(%self.param)
// CHECK:STDOUT: %InNamespaceClass.cpp_destructor.call: init %empty_tuple.type = call imports.%InNamespaceClass.cpp_destructor.decl(%self.param)
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- import_definition_in_relative_namespace_value_param_type.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
@@ -958,8 +988,14 @@ fn F() {
// CHECK:STDOUT: %Default.facet.3fb: %Default.type = facet_value %OuterClass, (%custom_witness.9b4) [concrete]
// CHECK:STDOUT: %DefaultOrUnformed.impl_witness.436: <witness> = impl_witness imports.%DefaultOrUnformed.impl_witness_table.162, @T.as_type.as.DefaultOrUnformed.impl(%Default.facet.3fb) [concrete]
// CHECK:STDOUT: %DefaultOrUnformed.facet: %DefaultOrUnformed.type = facet_value %OuterClass, (%DefaultOrUnformed.impl_witness.436) [concrete]
// CHECK:STDOUT: %self.param_patt.46e: %pattern_type.dd5 = ref_param_pattern [concrete]
// CHECK:STDOUT: %self.patt.360: %pattern_type.dd5 = wrapper_binding_pattern self, %self.param_patt.46e [concrete]
// CHECK:STDOUT: %OuterClass.cpp_destructor.type: type = fn_type @OuterClass.cpp_destructor [concrete]
// CHECK:STDOUT: %OuterClass.cpp_destructor: %OuterClass.cpp_destructor.type = struct_value () [concrete]
// CHECK:STDOUT: %Destroy.WithSelf.Op.type.ef0: type = fn_type @Destroy.WithSelf.Op.loc9 [concrete]
// CHECK:STDOUT: %Destroy.WithSelf.Op.403: %Destroy.WithSelf.Op.type.ef0 = struct_value () [concrete]
// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.type.fbc: type = fn_type @Destroy.WithSelf.SelfDestruct.loc9 [concrete]
// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.db3: %Destroy.WithSelf.SelfDestruct.type.fbc = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
@@ -977,6 +1013,21 @@ fn F() {
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import_ref.c2f: @T.as_type.as.DefaultOrUnformed.impl.%T.as_type.as.DefaultOrUnformed.impl.Op.type (%T.as_type.as.DefaultOrUnformed.impl.Op.type.0c9) = import_ref Core//prelude/parts/default, loc{{\d+_\d+}}, loaded [symbolic = @T.as_type.as.DefaultOrUnformed.impl.%T.as_type.as.DefaultOrUnformed.impl.Op (constants.%T.as_type.as.DefaultOrUnformed.impl.Op.cfe)]
// CHECK:STDOUT: %DefaultOrUnformed.impl_witness_table.162 = impl_witness_table (%Core.import_ref.c2f), @T.as_type.as.DefaultOrUnformed.impl [concrete]
// CHECK:STDOUT: %OuterClass.cpp_destructor.decl: %OuterClass.cpp_destructor.type = fn_decl @OuterClass.cpp_destructor [concrete = constants.%OuterClass.cpp_destructor] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: } {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generated {
// CHECK:STDOUT: %Destroy.WithSelf.Op.decl: %Destroy.WithSelf.Op.type.ef0 = fn_decl @Destroy.WithSelf.Op.loc9 [concrete = constants.%Destroy.WithSelf.Op.403] {
// CHECK:STDOUT: %self.param_patt: %pattern_type.dd5 = ref_param_pattern [concrete = constants.%self.param_patt.46e]
// CHECK:STDOUT: %self.patt: %pattern_type.dd5 = wrapper_binding_pattern self, %self.param_patt [concrete = constants.%self.patt.360]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %self.param: ref %OuterClass = ref_param call_param0
// CHECK:STDOUT: %self: ref %OuterClass = wrapper_binding self, %self.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F(%c.param: %InnerClass) {
@@ -1005,11 +1056,20 @@ fn F() {
// CHECK:STDOUT: %x.patt: %pattern_type.dd5 = ref_binding_pattern x [concrete = constants.%x.patt]
// CHECK:STDOUT: %x.var_patt: %pattern_type.dd5 = var_pattern %x.patt [concrete = constants.%x.var_patt]
// CHECK:STDOUT: }
// CHECK:STDOUT: %OuterClass.cpp_destructor.bound: <bound method> = bound_method %x.var, constants.%OuterClass.cpp_destructor
// CHECK:STDOUT: %OuterClass.cpp_destructor.call: init %empty_tuple.type = call %OuterClass.cpp_destructor.bound(%x.var)
// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.bound: <bound method> = bound_method %x.var, constants.%Destroy.WithSelf.SelfDestruct.db3
// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.call: init %empty_tuple.type = call %Destroy.WithSelf.SelfDestruct.bound(%x.var)
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Destroy.WithSelf.Op.loc9(%self.param: ref %OuterClass) = "no_op";
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Destroy.WithSelf.SelfDestruct.loc9(%self.param: ref %OuterClass) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Destroy.WithSelf.Op.call: init %empty_tuple.type = call generated.%Destroy.WithSelf.Op.decl(%self.param)
// CHECK:STDOUT: %OuterClass.cpp_destructor.call: init %empty_tuple.type = call imports.%OuterClass.cpp_destructor.decl(%self.param)
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- import_definition_and_static_method_call_before.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
@@ -1190,11 +1250,18 @@ fn F() {
// CHECK:STDOUT: %foo_def_value_return.cpp_overload_set.type: type = cpp_overload_set_type @foo_def_value_return.cpp_overload_set [concrete]
// CHECK:STDOUT: %foo_def_value_return.cpp_overload_set.value: %foo_def_value_return.cpp_overload_set.type = cpp_overload_set_value @foo_def_value_return.cpp_overload_set [concrete]
// CHECK:STDOUT: %DefValueReturnClass: type = class_type @DefValueReturnClass [concrete]
// CHECK:STDOUT: %pattern_type.7a7: type = pattern_type %DefValueReturnClass [concrete]
// CHECK:STDOUT: %ptr.8c3: type = ptr_type %DefValueReturnClass [concrete]
// CHECK:STDOUT: %foo_def_value_return__carbon_thunk.type: type = fn_type @foo_def_value_return__carbon_thunk [concrete]
// CHECK:STDOUT: %foo_def_value_return__carbon_thunk: %foo_def_value_return__carbon_thunk.type = struct_value () [concrete]
// CHECK:STDOUT: %self.param_patt.da2: %pattern_type.7a7 = ref_param_pattern [concrete]
// CHECK:STDOUT: %self.patt.4d6: %pattern_type.7a7 = wrapper_binding_pattern self, %self.param_patt.da2 [concrete]
// CHECK:STDOUT: %DefValueReturnClass.cpp_destructor.type: type = fn_type @DefValueReturnClass.cpp_destructor [concrete]
// CHECK:STDOUT: %DefValueReturnClass.cpp_destructor: %DefValueReturnClass.cpp_destructor.type = struct_value () [concrete]
// CHECK:STDOUT: %Destroy.WithSelf.Op.type.ef0: type = fn_type @Destroy.WithSelf.Op.loc8 [concrete]
// CHECK:STDOUT: %Destroy.WithSelf.Op.403: %Destroy.WithSelf.Op.type.ef0 = struct_value () [concrete]
// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.type.fbc: type = fn_type @Destroy.WithSelf.SelfDestruct.loc8 [concrete]
// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.db3: %Destroy.WithSelf.SelfDestruct.type.fbc = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
@@ -1208,6 +1275,21 @@ fn F() {
// CHECK:STDOUT: } {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: %DefValueReturnClass.cpp_destructor.decl: %DefValueReturnClass.cpp_destructor.type = fn_decl @DefValueReturnClass.cpp_destructor [concrete = constants.%DefValueReturnClass.cpp_destructor] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: } {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generated {
// CHECK:STDOUT: %Destroy.WithSelf.Op.decl: %Destroy.WithSelf.Op.type.ef0 = fn_decl @Destroy.WithSelf.Op.loc8 [concrete = constants.%Destroy.WithSelf.Op.403] {
// CHECK:STDOUT: %self.param_patt: %pattern_type.7a7 = ref_param_pattern [concrete = constants.%self.param_patt.da2]
// CHECK:STDOUT: %self.patt: %pattern_type.7a7 = wrapper_binding_pattern self, %self.param_patt [concrete = constants.%self.patt.4d6]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %self.param: ref %DefValueReturnClass = ref_param call_param0
// CHECK:STDOUT: %self: ref %DefValueReturnClass = wrapper_binding self, %self.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() {
@@ -1219,11 +1301,20 @@ fn F() {
// CHECK:STDOUT: %foo_def_value_return__carbon_thunk.call: init %empty_tuple.type = call imports.%foo_def_value_return__carbon_thunk.decl(%addr)
// CHECK:STDOUT: %.loc8_28.2: init %DefValueReturnClass to %.loc8_28.1 = mark_in_place_init %foo_def_value_return__carbon_thunk.call
// CHECK:STDOUT: %.loc8_28.3: ref %DefValueReturnClass = temporary %.loc8_28.1, %.loc8_28.2
// CHECK:STDOUT: %DefValueReturnClass.cpp_destructor.bound: <bound method> = bound_method %.loc8_28.3, constants.%DefValueReturnClass.cpp_destructor
// CHECK:STDOUT: %DefValueReturnClass.cpp_destructor.call: init %empty_tuple.type = call %DefValueReturnClass.cpp_destructor.bound(%.loc8_28.3)
// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.bound: <bound method> = bound_method %.loc8_28.3, constants.%Destroy.WithSelf.SelfDestruct.db3
// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.call: init %empty_tuple.type = call %Destroy.WithSelf.SelfDestruct.bound(%.loc8_28.3)
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Destroy.WithSelf.Op.loc8(%self.param: ref %DefValueReturnClass) = "no_op";
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Destroy.WithSelf.SelfDestruct.loc8(%self.param: ref %DefValueReturnClass) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Destroy.WithSelf.Op.call: init %empty_tuple.type = call generated.%Destroy.WithSelf.Op.decl(%self.param)
// CHECK:STDOUT: %DefValueReturnClass.cpp_destructor.call: init %empty_tuple.type = call imports.%DefValueReturnClass.cpp_destructor.decl(%self.param)
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- import_decl_pointer_return_type.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {