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Skip ImplWitnessTable::elements_id when generating fingerprints (#7629)

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Implementing interface modifiers causes an infinite loop when generating
fingerprints because the witness value generates a fingerprint that's
dependent on something dependent on the witness value. We've debugged
this to the witness table's `elements_id` field.

This hack is a workaround for creating a new block type whose value is
not codependent with its identity.

Co-authored-by: Richard Smith <richard@metafoo.co.uk>

Co-authored-by: Richard Smith <richard@metafoo.co.uk>
This commit is contained in:
Christopher Di Bella
2026-08-11 22:39:30 +00:00
committed by GitHub
co-authored by Richard Smith
parent cb5e9b6555
commit 4ea5ef45dd
368 changed files with 11718 additions and 11723 deletions
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toolchain/check/testdata/interop/cpp/function/import/inline.carbon
Vendored
+20 -20
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@@ -160,12 +160,12 @@ fn MyF() {
// CHECK:STDOUT: %To: Core.IntLiteral = symbolic_binding To, 0 [symbolic]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.e74: type = fn_type @Core.IntLiteral.as.ImplicitAs.impl.Convert, @Core.IntLiteral.as.ImplicitAs.impl(%To) [symbolic]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.845: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.e74 = struct_value () [symbolic]
// CHECK:STDOUT: %ImplicitAs.impl_witness.a23: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.b3c, @Core.IntLiteral.as.ImplicitAs.impl(%int_32) [concrete]
// CHECK:STDOUT: %ImplicitAs.impl_witness.a2a: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.1aa, @Core.IntLiteral.as.ImplicitAs.impl(%int_32) [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.2ba: type = fn_type @Core.IntLiteral.as.ImplicitAs.impl.Convert, @Core.IntLiteral.as.ImplicitAs.impl(%int_32) [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.e39: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.2ba = struct_value () [concrete]
// CHECK:STDOUT: %ImplicitAs.facet.9f1: %ImplicitAs.type.914 = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.a23) [concrete]
// CHECK:STDOUT: %ImplicitAs.WithSelf.Convert.type.740: type = fn_type @ImplicitAs.WithSelf.Convert, @ImplicitAs.WithSelf(%i32, %ImplicitAs.facet.9f1) [concrete]
// CHECK:STDOUT: %.1c5: type = fn_type_with_self_type %ImplicitAs.WithSelf.Convert.type.740, %ImplicitAs.facet.9f1 [concrete]
// CHECK:STDOUT: %ImplicitAs.facet.48f: %ImplicitAs.type.914 = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.a2a) [concrete]
// CHECK:STDOUT: %ImplicitAs.WithSelf.Convert.type.8eb: type = fn_type @ImplicitAs.WithSelf.Convert, @ImplicitAs.WithSelf(%i32, %ImplicitAs.facet.48f) [concrete]
// CHECK:STDOUT: %.b7a: type = fn_type_with_self_type %ImplicitAs.WithSelf.Convert.type.8eb, %ImplicitAs.facet.48f [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.094: <bound method> = bound_method %int_1.5b8, %Core.IntLiteral.as.ImplicitAs.impl.Convert.e39 [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn.571: <specific function> = specific_function %Core.IntLiteral.as.ImplicitAs.impl.Convert.e39, @Core.IntLiteral.as.ImplicitAs.impl.Convert(%int_32) [concrete]
// CHECK:STDOUT: %bound_method.953: <bound method> = bound_method %int_1.5b8, %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn.571 [concrete]
@@ -181,12 +181,12 @@ fn MyF() {
// CHECK:STDOUT: %ThunkOnArg__carbon_thunk: %ThunkOnArg__carbon_thunk.type = struct_value () [concrete]
// CHECK:STDOUT: %i16.builtin: type = int_type signed, %int_16 [concrete]
// CHECK:STDOUT: %ImplicitAs.type.044: type = facet_type <@ImplicitAs, @ImplicitAs(%i16)> [concrete]
// CHECK:STDOUT: %ImplicitAs.impl_witness.884: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.b3c, @Core.IntLiteral.as.ImplicitAs.impl(%int_16) [concrete]
// CHECK:STDOUT: %ImplicitAs.impl_witness.882: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.1aa, @Core.IntLiteral.as.ImplicitAs.impl(%int_16) [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.c22: type = fn_type @Core.IntLiteral.as.ImplicitAs.impl.Convert, @Core.IntLiteral.as.ImplicitAs.impl(%int_16) [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.0c0: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.c22 = struct_value () [concrete]
// CHECK:STDOUT: %ImplicitAs.facet.c33: %ImplicitAs.type.044 = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.884) [concrete]
// CHECK:STDOUT: %ImplicitAs.WithSelf.Convert.type.d17: type = fn_type @ImplicitAs.WithSelf.Convert, @ImplicitAs.WithSelf(%i16, %ImplicitAs.facet.c33) [concrete]
// CHECK:STDOUT: %.769: type = fn_type_with_self_type %ImplicitAs.WithSelf.Convert.type.d17, %ImplicitAs.facet.c33 [concrete]
// CHECK:STDOUT: %ImplicitAs.facet.eb2: %ImplicitAs.type.044 = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.882) [concrete]
// CHECK:STDOUT: %ImplicitAs.WithSelf.Convert.type.7b5: type = fn_type @ImplicitAs.WithSelf.Convert, @ImplicitAs.WithSelf(%i16, %ImplicitAs.facet.eb2) [concrete]
// CHECK:STDOUT: %.655: type = fn_type_with_self_type %ImplicitAs.WithSelf.Convert.type.7b5, %ImplicitAs.facet.eb2 [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.386: <bound method> = bound_method %int_1.5b8, %Core.IntLiteral.as.ImplicitAs.impl.Convert.0c0 [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn.06a: <specific function> = specific_function %Core.IntLiteral.as.ImplicitAs.impl.Convert.0c0, @Core.IntLiteral.as.ImplicitAs.impl.Convert(%int_16) [concrete]
// CHECK:STDOUT: %bound_method.b1b: <bound method> = bound_method %int_1.5b8, %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn.06a [concrete]
@@ -194,12 +194,12 @@ fn MyF() {
// CHECK:STDOUT: %Copy.type: type = facet_type <@Copy> [concrete]
// CHECK:STDOUT: %Int.as.Copy.impl.Op.type.ac8: type = fn_type @Int.as.Copy.impl.Op, @Int.as.Copy.impl(%N) [symbolic]
// CHECK:STDOUT: %Int.as.Copy.impl.Op.5e0: %Int.as.Copy.impl.Op.type.ac8 = struct_value () [symbolic]
// CHECK:STDOUT: %Copy.impl_witness.7d9: <witness> = impl_witness imports.%Copy.impl_witness_table.367, @Int.as.Copy.impl(%int_16) [concrete]
// CHECK:STDOUT: %Copy.impl_witness.b46: <witness> = impl_witness imports.%Copy.impl_witness_table.8d2, @Int.as.Copy.impl(%int_16) [concrete]
// CHECK:STDOUT: %Int.as.Copy.impl.Op.type.16c: type = fn_type @Int.as.Copy.impl.Op, @Int.as.Copy.impl(%int_16) [concrete]
// CHECK:STDOUT: %Int.as.Copy.impl.Op.25c: %Int.as.Copy.impl.Op.type.16c = struct_value () [concrete]
// CHECK:STDOUT: %Copy.facet: %Copy.type = facet_value %i16, (%Copy.impl_witness.7d9) [concrete]
// CHECK:STDOUT: %Copy.WithSelf.Op.type.332: type = fn_type @Copy.WithSelf.Op, @Copy.WithSelf(%Copy.facet) [concrete]
// CHECK:STDOUT: %.000: type = fn_type_with_self_type %Copy.WithSelf.Op.type.332, %Copy.facet [concrete]
// CHECK:STDOUT: %Copy.facet: %Copy.type = facet_value %i16, (%Copy.impl_witness.b46) [concrete]
// CHECK:STDOUT: %Copy.WithSelf.Op.type.bde: type = fn_type @Copy.WithSelf.Op, @Copy.WithSelf(%Copy.facet) [concrete]
// CHECK:STDOUT: %.d62: type = fn_type_with_self_type %Copy.WithSelf.Op.type.bde, %Copy.facet [concrete]
// CHECK:STDOUT: %Int.as.Copy.impl.Op.bound: <bound method> = bound_method %int_1.d17, %Int.as.Copy.impl.Op.25c [concrete]
// CHECK:STDOUT: %Int.as.Copy.impl.Op.specific_fn: <specific function> = specific_function %Int.as.Copy.impl.Op.25c, @Int.as.Copy.impl.Op(%int_16) [concrete]
// CHECK:STDOUT: %bound_method.47b: <bound method> = bound_method %int_1.d17, %Int.as.Copy.impl.Op.specific_fn [concrete]
@@ -235,7 +235,7 @@ fn MyF() {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import_ref.edf: @Core.IntLiteral.as.ImplicitAs.impl.%Core.IntLiteral.as.ImplicitAs.impl.Convert.type (%Core.IntLiteral.as.ImplicitAs.impl.Convert.type.e74) = import_ref Core//prelude/parts/int, loc{{\d+_\d+}}, loaded [symbolic = @Core.IntLiteral.as.ImplicitAs.impl.%Core.IntLiteral.as.ImplicitAs.impl.Convert (constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.845)]
// CHECK:STDOUT: %ImplicitAs.impl_witness_table.b3c = impl_witness_table (%Core.import_ref.edf), @Core.IntLiteral.as.ImplicitAs.impl [concrete]
// CHECK:STDOUT: %ImplicitAs.impl_witness_table.1aa = impl_witness_table (%Core.import_ref.edf), @Core.IntLiteral.as.ImplicitAs.impl [concrete]
// CHECK:STDOUT: %ThunkOnArg.cpp_overload_set.value: %ThunkOnArg.cpp_overload_set.type = cpp_overload_set_value @ThunkOnArg.cpp_overload_set [concrete = constants.%ThunkOnArg.cpp_overload_set.value]
// CHECK:STDOUT: %ThunkOnArg__carbon_thunk.decl: %ThunkOnArg__carbon_thunk.type = fn_decl @ThunkOnArg__carbon_thunk [concrete = constants.%ThunkOnArg__carbon_thunk] {
// CHECK:STDOUT: <elided>
@@ -243,7 +243,7 @@ fn MyF() {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import_ref.cd6: @Int.as.Copy.impl.%Int.as.Copy.impl.Op.type (%Int.as.Copy.impl.Op.type.ac8) = import_ref Core//prelude/parts/int, loc{{\d+_\d+}}, loaded [symbolic = @Int.as.Copy.impl.%Int.as.Copy.impl.Op (constants.%Int.as.Copy.impl.Op.5e0)]
// CHECK:STDOUT: %Copy.impl_witness_table.367 = impl_witness_table (%Core.import_ref.cd6), @Int.as.Copy.impl [concrete]
// CHECK:STDOUT: %Copy.impl_witness_table.8d2 = impl_witness_table (%Core.import_ref.cd6), @Int.as.Copy.impl [concrete]
// CHECK:STDOUT: %ThunkOnReturn.cpp_overload_set.value: %ThunkOnReturn.cpp_overload_set.type = cpp_overload_set_value @ThunkOnReturn.cpp_overload_set [concrete = constants.%ThunkOnReturn.cpp_overload_set.value]
// CHECK:STDOUT: %ThunkOnReturn__carbon_thunk.decl: %ThunkOnReturn__carbon_thunk.type = fn_decl @ThunkOnReturn__carbon_thunk [concrete = constants.%ThunkOnReturn__carbon_thunk] {
// CHECK:STDOUT: <elided>
@@ -263,7 +263,7 @@ fn MyF() {
// CHECK:STDOUT: %Cpp.ref.loc13: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %WithoutThunk.ref: %WithoutThunk.cpp_overload_set.type = name_ref WithoutThunk, imports.%WithoutThunk.cpp_overload_set.value [concrete = constants.%WithoutThunk.cpp_overload_set.value]
// CHECK:STDOUT: %int_1.loc13: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
// CHECK:STDOUT: %impl.elem0.loc13: %.1c5 = impl_witness_access constants.%ImplicitAs.impl_witness.a23, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.e39]
// CHECK:STDOUT: %impl.elem0.loc13: %.b7a = impl_witness_access constants.%ImplicitAs.impl_witness.a2a, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.e39]
// CHECK:STDOUT: %bound_method.loc13_41.1: <bound method> = bound_method %int_1.loc13, %impl.elem0.loc13 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.094]
// CHECK:STDOUT: %specific_fn.loc13: <specific function> = specific_function %impl.elem0.loc13, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn.571]
// CHECK:STDOUT: %bound_method.loc13_41.2: <bound method> = bound_method %int_1.loc13, %specific_fn.loc13 [concrete = constants.%bound_method.953]
@@ -281,14 +281,14 @@ fn MyF() {
// CHECK:STDOUT: %Cpp.ref.loc14: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %ThunkOnArg.ref: %ThunkOnArg.cpp_overload_set.type = name_ref ThunkOnArg, imports.%ThunkOnArg.cpp_overload_set.value [concrete = constants.%ThunkOnArg.cpp_overload_set.value]
// CHECK:STDOUT: %int_1.loc14: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
// CHECK:STDOUT: %impl.elem0.loc14_39.1: %.769 = impl_witness_access constants.%ImplicitAs.impl_witness.884, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.0c0]
// CHECK:STDOUT: %impl.elem0.loc14_39.1: %.655 = impl_witness_access constants.%ImplicitAs.impl_witness.882, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.0c0]
// CHECK:STDOUT: %bound_method.loc14_39.1: <bound method> = bound_method %int_1.loc14, %impl.elem0.loc14_39.1 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.386]
// CHECK:STDOUT: %specific_fn.loc14_39.1: <specific function> = specific_function %impl.elem0.loc14_39.1, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_16) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn.06a]
// CHECK:STDOUT: %bound_method.loc14_39.2: <bound method> = bound_method %int_1.loc14, %specific_fn.loc14_39.1 [concrete = constants.%bound_method.b1b]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc14: init %i16 = call %bound_method.loc14_39.2(%int_1.loc14) [concrete = constants.%int_1.d17]
// CHECK:STDOUT: %.loc14_39.1: %i16 = value_of_initializer %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc14 [concrete = constants.%int_1.d17]
// CHECK:STDOUT: %.loc14_39.2: %i16 = converted %int_1.loc14, %.loc14_39.1 [concrete = constants.%int_1.d17]
// CHECK:STDOUT: %impl.elem0.loc14_39.2: %.000 = impl_witness_access constants.%Copy.impl_witness.7d9, element0 [concrete = constants.%Int.as.Copy.impl.Op.25c]
// CHECK:STDOUT: %impl.elem0.loc14_39.2: %.d62 = impl_witness_access constants.%Copy.impl_witness.b46, element0 [concrete = constants.%Int.as.Copy.impl.Op.25c]
// CHECK:STDOUT: %bound_method.loc14_39.3: <bound method> = bound_method %.loc14_39.2, %impl.elem0.loc14_39.2 [concrete = constants.%Int.as.Copy.impl.Op.bound]
// CHECK:STDOUT: %specific_fn.loc14_39.2: <specific function> = specific_function %impl.elem0.loc14_39.2, @Int.as.Copy.impl.Op(constants.%int_16) [concrete = constants.%Int.as.Copy.impl.Op.specific_fn]
// CHECK:STDOUT: %bound_method.loc14_39.4: <bound method> = bound_method %.loc14_39.2, %specific_fn.loc14_39.2 [concrete = constants.%bound_method.47b]
@@ -307,7 +307,7 @@ fn MyF() {
// CHECK:STDOUT: %Cpp.ref.loc15: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %ThunkOnReturn.ref: %ThunkOnReturn.cpp_overload_set.type = name_ref ThunkOnReturn, imports.%ThunkOnReturn.cpp_overload_set.value [concrete = constants.%ThunkOnReturn.cpp_overload_set.value]
// CHECK:STDOUT: %int_1.loc15: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
// CHECK:STDOUT: %impl.elem0.loc15: %.1c5 = impl_witness_access constants.%ImplicitAs.impl_witness.a23, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.e39]
// CHECK:STDOUT: %impl.elem0.loc15: %.b7a = impl_witness_access constants.%ImplicitAs.impl_witness.a2a, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.e39]
// CHECK:STDOUT: %bound_method.loc15_42.1: <bound method> = bound_method %int_1.loc15, %impl.elem0.loc15 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.094]
// CHECK:STDOUT: %specific_fn.loc15: <specific function> = specific_function %impl.elem0.loc15, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn.571]
// CHECK:STDOUT: %bound_method.loc15_42.2: <bound method> = bound_method %int_1.loc15, %specific_fn.loc15 [concrete = constants.%bound_method.953]
@@ -328,14 +328,14 @@ fn MyF() {
// CHECK:STDOUT: %Cpp.ref.loc16: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %ThunkOnBoth.ref: %ThunkOnBoth.cpp_overload_set.type = name_ref ThunkOnBoth, imports.%ThunkOnBoth.cpp_overload_set.value [concrete = constants.%ThunkOnBoth.cpp_overload_set.value]
// CHECK:STDOUT: %int_1.loc16: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
// CHECK:STDOUT: %impl.elem0.loc16_40.1: %.769 = impl_witness_access constants.%ImplicitAs.impl_witness.884, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.0c0]
// CHECK:STDOUT: %impl.elem0.loc16_40.1: %.655 = impl_witness_access constants.%ImplicitAs.impl_witness.882, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.0c0]
// CHECK:STDOUT: %bound_method.loc16_40.1: <bound method> = bound_method %int_1.loc16, %impl.elem0.loc16_40.1 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.386]
// CHECK:STDOUT: %specific_fn.loc16_40.1: <specific function> = specific_function %impl.elem0.loc16_40.1, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_16) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn.06a]
// CHECK:STDOUT: %bound_method.loc16_40.2: <bound method> = bound_method %int_1.loc16, %specific_fn.loc16_40.1 [concrete = constants.%bound_method.b1b]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc16: init %i16 = call %bound_method.loc16_40.2(%int_1.loc16) [concrete = constants.%int_1.d17]
// CHECK:STDOUT: %.loc16_40.1: %i16 = value_of_initializer %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc16 [concrete = constants.%int_1.d17]
// CHECK:STDOUT: %.loc16_40.2: %i16 = converted %int_1.loc16, %.loc16_40.1 [concrete = constants.%int_1.d17]
// CHECK:STDOUT: %impl.elem0.loc16_40.2: %.000 = impl_witness_access constants.%Copy.impl_witness.7d9, element0 [concrete = constants.%Int.as.Copy.impl.Op.25c]
// CHECK:STDOUT: %impl.elem0.loc16_40.2: %.d62 = impl_witness_access constants.%Copy.impl_witness.b46, element0 [concrete = constants.%Int.as.Copy.impl.Op.25c]
// CHECK:STDOUT: %bound_method.loc16_40.3: <bound method> = bound_method %.loc16_40.2, %impl.elem0.loc16_40.2 [concrete = constants.%Int.as.Copy.impl.Op.bound]
// CHECK:STDOUT: %specific_fn.loc16_40.2: <specific function> = specific_function %impl.elem0.loc16_40.2, @Int.as.Copy.impl.Op(constants.%int_16) [concrete = constants.%Int.as.Copy.impl.Op.specific_fn]
// CHECK:STDOUT: %bound_method.loc16_40.4: <bound method> = bound_method %.loc16_40.2, %specific_fn.loc16_40.2 [concrete = constants.%bound_method.47b]