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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/lower/testdata/interop/cpp/function/export/generic.carbon
Vendored
+12 -12
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@@ -132,7 +132,7 @@ fn Run() {
// CHECK:STDOUT: define internal void @_ZN6CarbonL1FENS_1AE() #2 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %0 = alloca %"class.Carbon::A", align 1
// CHECK:STDOUT: call void @_CF__carbon_thunk.83afdff581006d1a.Main(ptr noundef nonnull align 1 %0)
// CHECK:STDOUT: call void @_CF__carbon_thunk.26f2099a79512a5d.Main(ptr noundef nonnull align 1 %0)
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
@@ -152,7 +152,7 @@ fn Run() {
// CHECK:STDOUT: define internal void @_ZN6CarbonL1FENS_1BE() #2 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %0 = alloca %"class.Carbon::B", align 1
// CHECK:STDOUT: call void @_CF__carbon_thunk.36f470e96b413347.Main(ptr noundef nonnull align 1 %0)
// CHECK:STDOUT: call void @_CF__carbon_thunk.7a3b9f04ddf4269e.Main(ptr noundef nonnull align 1 %0)
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
@@ -208,16 +208,16 @@ fn Run() {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CF__carbon_thunk.83afdff581006d1a.Main(ptr %_) #4 !dbg !44 {
// CHECK:STDOUT: define void @_CF__carbon_thunk.26f2099a79512a5d.Main(ptr %_) #4 !dbg !44 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @_CF.Main.3e1f7ed08cd9ee58(ptr %_), !dbg !47
// CHECK:STDOUT: call void @_CF.Main.6662a1ffb773360a(ptr %_), !dbg !47
// CHECK:STDOUT: ret void, !dbg !47
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CF__carbon_thunk.36f470e96b413347.Main(ptr %_) #4 !dbg !48 {
// CHECK:STDOUT: define void @_CF__carbon_thunk.7a3b9f04ddf4269e.Main(ptr %_) #4 !dbg !48 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @_CF.Main.bd1b6d59f703c190(ptr %_), !dbg !51
// CHECK:STDOUT: call void @_CF.Main.d53b17eed3ce903c(ptr %_), !dbg !51
// CHECK:STDOUT: ret void, !dbg !51
// CHECK:STDOUT: }
// CHECK:STDOUT:
@@ -229,14 +229,14 @@ fn Run() {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CF.Main.3e1f7ed08cd9ee58(ptr %t) #4 !dbg !58 {
// CHECK:STDOUT: define linkonce_odr void @_CF.Main.6662a1ffb773360a(ptr %t) #4 !dbg !58 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @"_CDoit.A.Main:I.Main"(ptr %t), !dbg !61
// CHECK:STDOUT: ret void, !dbg !62
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CF.Main.bd1b6d59f703c190(ptr %t) #4 !dbg !63 {
// CHECK:STDOUT: define linkonce_odr void @_CF.Main.d53b17eed3ce903c(ptr %t) #4 !dbg !63 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @"_CDoit.B.Main:I.Main"(ptr %t), !dbg !66
// CHECK:STDOUT: ret void, !dbg !67
@@ -303,11 +303,11 @@ fn Run() {
// CHECK:STDOUT: !41 = !{!42}
// CHECK:STDOUT: !42 = !DILocalVariable(arg: 1, scope: !40, type: !20)
// CHECK:STDOUT: !43 = !DILocation(line: 13, column: 1, scope: !40)
// CHECK:STDOUT: !44 = distinct !DISubprogram(name: "F__carbon_thunk.83afdff581006d1a", linkageName: "_CF__carbon_thunk.83afdff581006d1a.Main", scope: null, file: !1, line: 19, type: !18, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !45)
// CHECK:STDOUT: !44 = distinct !DISubprogram(name: "F__carbon_thunk.26f2099a79512a5d", linkageName: "_CF__carbon_thunk.26f2099a79512a5d.Main", scope: null, file: !1, line: 19, type: !18, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !45)
// CHECK:STDOUT: !45 = !{!46}
// CHECK:STDOUT: !46 = !DILocalVariable(arg: 1, scope: !44, type: !20)
// CHECK:STDOUT: !47 = !DILocation(line: 19, column: 1, scope: !44)
// CHECK:STDOUT: !48 = distinct !DISubprogram(name: "F__carbon_thunk.36f470e96b413347", linkageName: "_CF__carbon_thunk.36f470e96b413347.Main", scope: null, file: !1, line: 19, type: !18, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !49)
// CHECK:STDOUT: !48 = distinct !DISubprogram(name: "F__carbon_thunk.7a3b9f04ddf4269e", linkageName: "_CF__carbon_thunk.7a3b9f04ddf4269e.Main", scope: null, file: !1, line: 19, type: !18, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !49)
// CHECK:STDOUT: !49 = !{!50}
// CHECK:STDOUT: !50 = !DILocalVariable(arg: 1, scope: !48, type: !20)
// CHECK:STDOUT: !51 = !DILocation(line: 19, column: 1, scope: !48)
@@ -317,12 +317,12 @@ fn Run() {
// CHECK:STDOUT: !55 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
// CHECK:STDOUT: !56 = !DILocation(line: 33, column: 3, scope: !52)
// CHECK:STDOUT: !57 = !DILocation(line: 32, column: 1, scope: !52)
// CHECK:STDOUT: !58 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main.3e1f7ed08cd9ee58", scope: null, file: !1, line: 19, type: !18, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !59)
// CHECK:STDOUT: !58 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main.6662a1ffb773360a", scope: null, file: !1, line: 19, type: !18, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !59)
// CHECK:STDOUT: !59 = !{!60}
// CHECK:STDOUT: !60 = !DILocalVariable(arg: 1, scope: !58, type: !20)
// CHECK:STDOUT: !61 = !DILocation(line: 20, column: 3, scope: !58)
// CHECK:STDOUT: !62 = !DILocation(line: 19, column: 1, scope: !58)
// CHECK:STDOUT: !63 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main.bd1b6d59f703c190", scope: null, file: !1, line: 19, type: !18, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !64)
// CHECK:STDOUT: !63 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main.d53b17eed3ce903c", scope: null, file: !1, line: 19, type: !18, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !64)
// CHECK:STDOUT: !64 = !{!65}
// CHECK:STDOUT: !65 = !DILocalVariable(arg: 1, scope: !63, type: !20)
// CHECK:STDOUT: !66 = !DILocation(line: 20, column: 3, scope: !63)