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carbon-lang/toolchain/lower/testdata/interface/modifiers.carbon
T
Dana Jansens 4416f3525b Canonicalize generated functions for Core witnesses (#7729) 
Use a single `SemIR::Function` per `Core` interface method, whether it's
generated locally or imported. This prevents generating duplicate
functions, which lead to different types when the witness appears in a
`FacetValue` as part of a specific for a class.

We use a `CanonicalValueStore` of `GeneratedFunction` objects that allow
finding an existing FunctionId for a `Generated` special function before
(re-)generating it. Mangling for `Generated` functions is also moved to
use the values from the `GeneratedFunction`'s canonicalization key, so
that we have a consistent source of truth for the unique ID of a
`Generated` function across all files.

New tests are in
`toolchain/check/testdata/impl/custom_witness/destroy.carbon`.
2026-09-15 16:02:13 +00:00

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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/convert.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/lower/testdata/interface/modifiers.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/interface/modifiers.carbon
// --- default_interfaces.carbon
library "[[@TEST_NAME]]";
fn Hello() {}
interface DefaultFn {
default fn F() { Hello(); }
}
fn World[T: type](unused t: T) {}
interface DefaultMethod {
default fn M(self) { World(self); }
}
fn CallFn(generic d: DefaultFn) {
d.F();
}
fn CallMethod[T: DefaultMethod](t: T) {
t.M();
}
// --- final_interfaces.carbon
library "[[@TEST_NAME]]";
interface FinalFn {
final fn F() {}
}
interface FinalMethod {
final fn M(unused self) {}
}
fn CallFn(generic f: FinalFn) {
f.F();
}
fn CallMethod[T: FinalMethod](t: T) {
t.M();
}
// --- default_function.carbon
library "[[@TEST_NAME]]";
import library "default_interfaces";
class C {
impl as DefaultFn {}
}
fn F() {
CallFn(C);
}
// --- default_method.carbon
library "[[@TEST_NAME]]";
import library "default_interfaces";
class C {
impl as DefaultMethod {}
}
fn F() {
let c: C = {};
CallMethod(c);
}
// --- default_function_overridden.carbon
library "[[@TEST_NAME]]";
import library "default_interfaces";
class C {
fn Clone(unused other: C) { }
impl as DefaultFn {
fn F() { C.Clone({}); }
}
}
fn F() {
CallFn(C);
}
// --- default_method_overridden.carbon
library "[[@TEST_NAME]]";
import library "default_interfaces";
class C {
fn Copy(unused self) { }
impl as DefaultMethod {
fn M(self) { self.Copy(); }
}
}
fn F() {
let c: C = {};
CallMethod(c);
}
// --- final_function.carbon
library "[[@TEST_NAME]]";
import library "final_interfaces";
class C {
impl as FinalFn {}
}
fn F() {
CallFn(C);
}
// --- final_method.carbon
library "[[@TEST_NAME]]";
import library "final_interfaces";
class C {
impl as FinalMethod {}
}
fn F() {
let c: C = {};
CallMethod(c);
}
// CHECK:STDOUT: ; ---
// CHECK:STDOUT: ; ModuleID = 'default_interfaces.carbon'
// CHECK:STDOUT: source_filename = "default_interfaces.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CHello.Main() #0 !dbg !18 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !19
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.dbg.cu = !{!15}
// CHECK:STDOUT: !llvm.module.flags = !{!2, !3}
// CHECK:STDOUT:
// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !14 = !DIFile(filename: "default_interfaces.carbon", directory: "")
// CHECK:STDOUT: !15 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !14, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !16 = !{null}
// CHECK:STDOUT: !17 = !DISubroutineType(types: !16)
// CHECK:STDOUT: !18 = distinct !DISubprogram(name: "Hello", linkageName: "_CHello.Main", scope: null, file: !14, line: 4, type: !17, spFlags: DISPFlagDefinition, unit: !15)
// CHECK:STDOUT: !19 = !DILocation(line: 4, column: 1, scope: !18)
// CHECK:STDOUT:
// CHECK:STDOUT: ; ---
// CHECK:STDOUT: ; ModuleID = 'final_interfaces.carbon'
// CHECK:STDOUT: source_filename = "final_interfaces.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.dbg.cu = !{!21}
// CHECK:STDOUT: !llvm.module.flags = !{!2, !3}
// CHECK:STDOUT:
// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !20 = !DIFile(filename: "final_interfaces.carbon", directory: "")
// CHECK:STDOUT: !21 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !20, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT:
// CHECK:STDOUT: ; ---
// CHECK:STDOUT: ; ModuleID = 'default_function.carbon'
// CHECK:STDOUT: source_filename = "default_function.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CF.Main() #0 !dbg !24 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @_CCallFn.Main.794e85173e977a8b(), !dbg !25
// CHECK:STDOUT: ret void, !dbg !26
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CCallFn.Main.794e85173e977a8b() #0 !dbg !27 {
// CHECK:STDOUT: call void @_CF.DefaultFn.Main.794e85173e977a8b(), !dbg !28
// CHECK:STDOUT: ret void, !dbg !29
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_CHello.Main()
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CF.DefaultFn.Main.794e85173e977a8b() #0 !dbg !30 {
// CHECK:STDOUT: call void @_CHello.Main(), !dbg !31
// CHECK:STDOUT: ret void, !dbg !32
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.dbg.cu = !{!23}
// CHECK:STDOUT: !llvm.module.flags = !{!2, !3}
// CHECK:STDOUT:
// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !14 = !DIFile(filename: "default_interfaces.carbon", directory: "")
// CHECK:STDOUT: !16 = !{null}
// CHECK:STDOUT: !17 = !DISubroutineType(types: !16)
// CHECK:STDOUT: !22 = !DIFile(filename: "default_function.carbon", directory: "")
// CHECK:STDOUT: !23 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !22, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !24 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !22, line: 9, type: !17, spFlags: DISPFlagDefinition, unit: !23)
// CHECK:STDOUT: !25 = !DILocation(line: 10, column: 3, scope: !24)
// CHECK:STDOUT: !26 = !DILocation(line: 9, column: 1, scope: !24)
// CHECK:STDOUT: !27 = distinct !DISubprogram(name: "CallFn", linkageName: "_CCallFn.Main.794e85173e977a8b", scope: null, file: !14, line: 16, type: !17, spFlags: DISPFlagDefinition, unit: !23)
// CHECK:STDOUT: !28 = !DILocation(line: 17, column: 3, scope: !27)
// CHECK:STDOUT: !29 = !DILocation(line: 16, column: 1, scope: !27)
// CHECK:STDOUT: !30 = distinct !DISubprogram(name: "F", linkageName: "_CF.DefaultFn.Main.794e85173e977a8b", scope: null, file: !14, line: 7, type: !17, spFlags: DISPFlagDefinition, unit: !23)
// CHECK:STDOUT: !31 = !DILocation(line: 7, column: 20, scope: !30)
// CHECK:STDOUT: !32 = !DILocation(line: 7, column: 3, scope: !30)
// CHECK:STDOUT:
// CHECK:STDOUT: ; ---
// CHECK:STDOUT: ; ModuleID = 'default_method.carbon'
// CHECK:STDOUT: source_filename = "default_method.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: @C.val = internal constant {} zeroinitializer
// CHECK:STDOUT: @C.val.loc10_15.6 = internal constant {} zeroinitializer
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CF.Main() #0 !dbg !38 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc10_15.2.temp = alloca {}, align 1, !dbg !39
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc10_15.2.temp), !dbg !39
// CHECK:STDOUT: call void @_CCallMethod.Main.805a971dc5455081(ptr @C.val.loc10_15.6), !dbg !43
// CHECK:STDOUT: call void @"_COp.08d9e38b928ba575:core.Destroy.Core"(ptr @C.val), !dbg !39
// CHECK:STDOUT: ret void, !dbg !44
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_COp.08d9e38b928ba575:core.Destroy.Core"(ptr %self) #0 !dbg !45 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !47
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CCallMethod.Main.805a971dc5455081(ptr %t) #0 !dbg !49 {
// CHECK:STDOUT: call void @_CM.DefaultMethod.Main.805a971dc5455081(ptr %t), !dbg !52
// CHECK:STDOUT: ret void, !dbg !53
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_CHello.Main()
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CM.DefaultMethod.Main.805a971dc5455081(ptr %self) #0 !dbg !55 {
// CHECK:STDOUT: call void @_CWorld.Main.9522ff908e97e267(ptr %self), !dbg !59
// CHECK:STDOUT: ret void, !dbg !60
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CWorld.Main.9522ff908e97e267(ptr %t) #0 !dbg !62 {
// CHECK:STDOUT: ret void, !dbg !65
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.dbg.cu = !{!34}
// CHECK:STDOUT: !llvm.module.flags = !{!2, !3}
// CHECK:STDOUT:
// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !14 = !DIFile(filename: "default_interfaces.carbon", directory: "")
// CHECK:STDOUT: !16 = !{null}
// CHECK:STDOUT: !17 = !DISubroutineType(types: !16)
// CHECK:STDOUT: !33 = !DIFile(filename: "default_method.carbon", directory: "")
// CHECK:STDOUT: !34 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !33, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !35 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
// CHECK:STDOUT: !36 = !{null, !35}
// CHECK:STDOUT: !37 = !DISubroutineType(types: !36)
// CHECK:STDOUT: !38 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !33, line: 9, type: !17, spFlags: DISPFlagDefinition, unit: !34)
// CHECK:STDOUT: !39 = !DILocation(line: 10, column: 14, scope: !38)
// CHECK:STDOUT: !43 = !DILocation(line: 11, column: 3, scope: !38)
// CHECK:STDOUT: !44 = !DILocation(line: 9, column: 1, scope: !38)
// CHECK:STDOUT: !45 = distinct !DISubprogram(name: "Op", linkageName: "_COp.08d9e38b928ba575:core.Destroy.Core", scope: null, file: !33, line: 10, type: !37, spFlags: DISPFlagDefinition, unit: !34, retainedNodes: !48)
// CHECK:STDOUT: !46 = !DILocalVariable(arg: 1, scope: !45, type: !35)
// CHECK:STDOUT: !47 = !DILocation(line: 10, column: 14, scope: !45)
// CHECK:STDOUT: !48 = !{!46}
// CHECK:STDOUT: !49 = distinct !DISubprogram(name: "CallMethod", linkageName: "_CCallMethod.Main.805a971dc5455081", scope: null, file: !14, line: 20, type: !37, spFlags: DISPFlagDefinition, unit: !34, retainedNodes: !54)
// CHECK:STDOUT: !50 = !DILocalVariable(arg: 1, scope: !49, type: !35)
// CHECK:STDOUT: !52 = !DILocation(line: 21, column: 3, scope: !49)
// CHECK:STDOUT: !53 = !DILocation(line: 20, column: 1, scope: !49)
// CHECK:STDOUT: !54 = !{!50}
// CHECK:STDOUT: !55 = distinct !DISubprogram(name: "M", linkageName: "_CM.DefaultMethod.Main.805a971dc5455081", scope: null, file: !14, line: 13, type: !37, spFlags: DISPFlagDefinition, unit: !34, retainedNodes: !61)
// CHECK:STDOUT: !56 = !DILocalVariable(arg: 1, scope: !55, type: !35)
// CHECK:STDOUT: !59 = !DILocation(line: 13, column: 24, scope: !55)
// CHECK:STDOUT: !60 = !DILocation(line: 13, column: 3, scope: !55)
// CHECK:STDOUT: !61 = !{!56}
// CHECK:STDOUT: !62 = distinct !DISubprogram(name: "World", linkageName: "_CWorld.Main.9522ff908e97e267", scope: null, file: !14, line: 10, type: !37, spFlags: DISPFlagDefinition, unit: !34, retainedNodes: !66)
// CHECK:STDOUT: !63 = !DILocalVariable(arg: 1, scope: !62, type: !35)
// CHECK:STDOUT: !65 = !DILocation(line: 10, column: 1, scope: !62)
// CHECK:STDOUT: !66 = !{!63}
// CHECK:STDOUT:
// CHECK:STDOUT: ; ---
// CHECK:STDOUT: ; ModuleID = 'default_function_overridden.carbon'
// CHECK:STDOUT: source_filename = "default_function_overridden.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: @C.val = internal constant {} zeroinitializer
// CHECK:STDOUT: @C.val.loc9_23.6 = internal constant {} zeroinitializer
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CClone.C.Main(ptr %other) #0 !dbg !69 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !72
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @"_CF.C.Main:DefaultFn.Main"() #0 !dbg !74 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc9_23.2.temp = alloca {}, align 1, !dbg !75
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc9_23.2.temp), !dbg !75
// CHECK:STDOUT: call void @_CClone.C.Main(ptr @C.val.loc9_23.6), !dbg !76
// CHECK:STDOUT: call void @"_COp.08d9e38b928ba575:core.Destroy.Core"(ptr @C.val), !dbg !75
// CHECK:STDOUT: ret void, !dbg !77
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_COp.08d9e38b928ba575:core.Destroy.Core"(ptr %self) #0 !dbg !78 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !80
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CF.Main() #0 !dbg !82 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @_CCallFn.Main.794e85173e977a8b(), !dbg !83
// CHECK:STDOUT: ret void, !dbg !84
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CCallFn.Main.794e85173e977a8b() #0 !dbg !85 {
// CHECK:STDOUT: call void @"_CF.C.Main:DefaultFn.Main"(), !dbg !86
// CHECK:STDOUT: ret void, !dbg !87
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_CHello.Main()
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.dbg.cu = !{!68}
// CHECK:STDOUT: !llvm.module.flags = !{!2, !3}
// CHECK:STDOUT:
// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !14 = !DIFile(filename: "default_interfaces.carbon", directory: "")
// CHECK:STDOUT: !16 = !{null}
// CHECK:STDOUT: !17 = !DISubroutineType(types: !16)
// CHECK:STDOUT: !35 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
// CHECK:STDOUT: !36 = !{null, !35}
// CHECK:STDOUT: !37 = !DISubroutineType(types: !36)
// CHECK:STDOUT: !67 = !DIFile(filename: "default_function_overridden.carbon", directory: "")
// CHECK:STDOUT: !68 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !67, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !69 = distinct !DISubprogram(name: "Clone", linkageName: "_CClone.C.Main", scope: null, file: !67, line: 6, type: !37, spFlags: DISPFlagDefinition, unit: !68, retainedNodes: !73)
// CHECK:STDOUT: !70 = !DILocalVariable(arg: 1, scope: !69, type: !35)
// CHECK:STDOUT: !72 = !DILocation(line: 6, column: 3, scope: !69)
// CHECK:STDOUT: !73 = !{!70}
// CHECK:STDOUT: !74 = distinct !DISubprogram(name: "F", linkageName: "_CF.C.Main:DefaultFn.Main", scope: null, file: !67, line: 9, type: !17, spFlags: DISPFlagDefinition, unit: !68)
// CHECK:STDOUT: !75 = !DILocation(line: 9, column: 22, scope: !74)
// CHECK:STDOUT: !76 = !DILocation(line: 9, column: 14, scope: !74)
// CHECK:STDOUT: !77 = !DILocation(line: 9, column: 5, scope: !74)
// CHECK:STDOUT: !78 = distinct !DISubprogram(name: "Op", linkageName: "_COp.08d9e38b928ba575:core.Destroy.Core", scope: null, file: !67, line: 9, type: !37, spFlags: DISPFlagDefinition, unit: !68, retainedNodes: !81)
// CHECK:STDOUT: !79 = !DILocalVariable(arg: 1, scope: !78, type: !35)
// CHECK:STDOUT: !80 = !DILocation(line: 9, column: 22, scope: !78)
// CHECK:STDOUT: !81 = !{!79}
// CHECK:STDOUT: !82 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !67, line: 13, type: !17, spFlags: DISPFlagDefinition, unit: !68)
// CHECK:STDOUT: !83 = !DILocation(line: 14, column: 3, scope: !82)
// CHECK:STDOUT: !84 = !DILocation(line: 13, column: 1, scope: !82)
// CHECK:STDOUT: !85 = distinct !DISubprogram(name: "CallFn", linkageName: "_CCallFn.Main.794e85173e977a8b", scope: null, file: !14, line: 16, type: !17, spFlags: DISPFlagDefinition, unit: !68)
// CHECK:STDOUT: !86 = !DILocation(line: 17, column: 3, scope: !85)
// CHECK:STDOUT: !87 = !DILocation(line: 16, column: 1, scope: !85)
// CHECK:STDOUT:
// CHECK:STDOUT: ; ---
// CHECK:STDOUT: ; ModuleID = 'default_method_overridden.carbon'
// CHECK:STDOUT: source_filename = "default_method_overridden.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: @C.val = internal constant {} zeroinitializer
// CHECK:STDOUT: @C.val.loc14_15.6 = internal constant {} zeroinitializer
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CCopy.C.Main(ptr %self) #0 !dbg !90 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !93
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @"_CM.C.Main:DefaultMethod.Main"(ptr %self) #0 !dbg !95 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @_CCopy.C.Main(ptr %self), !dbg !98
// CHECK:STDOUT: ret void, !dbg !99
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CF.Main() #0 !dbg !101 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc14_15.2.temp = alloca {}, align 1, !dbg !102
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc14_15.2.temp), !dbg !102
// CHECK:STDOUT: call void @_CCallMethod.Main.805a971dc5455081(ptr @C.val.loc14_15.6), !dbg !106
// CHECK:STDOUT: call void @"_COp.08d9e38b928ba575:core.Destroy.Core"(ptr @C.val), !dbg !102
// CHECK:STDOUT: ret void, !dbg !107
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_COp.08d9e38b928ba575:core.Destroy.Core"(ptr %self) #0 !dbg !108 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !110
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CCallMethod.Main.805a971dc5455081(ptr %t) #0 !dbg !112 {
// CHECK:STDOUT: call void @"_CM.C.Main:DefaultMethod.Main"(ptr %t), !dbg !115
// CHECK:STDOUT: ret void, !dbg !116
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_CHello.Main()
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.dbg.cu = !{!89}
// CHECK:STDOUT: !llvm.module.flags = !{!2, !3}
// CHECK:STDOUT:
// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !14 = !DIFile(filename: "default_interfaces.carbon", directory: "")
// CHECK:STDOUT: !16 = !{null}
// CHECK:STDOUT: !17 = !DISubroutineType(types: !16)
// CHECK:STDOUT: !35 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
// CHECK:STDOUT: !36 = !{null, !35}
// CHECK:STDOUT: !37 = !DISubroutineType(types: !36)
// CHECK:STDOUT: !88 = !DIFile(filename: "default_method_overridden.carbon", directory: "")
// CHECK:STDOUT: !89 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !88, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !90 = distinct !DISubprogram(name: "Copy", linkageName: "_CCopy.C.Main", scope: null, file: !88, line: 6, type: !37, spFlags: DISPFlagDefinition, unit: !89, retainedNodes: !94)
// CHECK:STDOUT: !91 = !DILocalVariable(arg: 1, scope: !90, type: !35)
// CHECK:STDOUT: !93 = !DILocation(line: 6, column: 3, scope: !90)
// CHECK:STDOUT: !94 = !{!91}
// CHECK:STDOUT: !95 = distinct !DISubprogram(name: "M", linkageName: "_CM.C.Main:DefaultMethod.Main", scope: null, file: !88, line: 9, type: !37, spFlags: DISPFlagDefinition, unit: !89, retainedNodes: !100)
// CHECK:STDOUT: !96 = !DILocalVariable(arg: 1, scope: !95, type: !35)
// CHECK:STDOUT: !98 = !DILocation(line: 9, column: 18, scope: !95)
// CHECK:STDOUT: !99 = !DILocation(line: 9, column: 5, scope: !95)
// CHECK:STDOUT: !100 = !{!96}
// CHECK:STDOUT: !101 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !88, line: 13, type: !17, spFlags: DISPFlagDefinition, unit: !89)
// CHECK:STDOUT: !102 = !DILocation(line: 14, column: 14, scope: !101)
// CHECK:STDOUT: !106 = !DILocation(line: 15, column: 3, scope: !101)
// CHECK:STDOUT: !107 = !DILocation(line: 13, column: 1, scope: !101)
// CHECK:STDOUT: !108 = distinct !DISubprogram(name: "Op", linkageName: "_COp.08d9e38b928ba575:core.Destroy.Core", scope: null, file: !88, line: 14, type: !37, spFlags: DISPFlagDefinition, unit: !89, retainedNodes: !111)
// CHECK:STDOUT: !109 = !DILocalVariable(arg: 1, scope: !108, type: !35)
// CHECK:STDOUT: !110 = !DILocation(line: 14, column: 14, scope: !108)
// CHECK:STDOUT: !111 = !{!109}
// CHECK:STDOUT: !112 = distinct !DISubprogram(name: "CallMethod", linkageName: "_CCallMethod.Main.805a971dc5455081", scope: null, file: !14, line: 20, type: !37, spFlags: DISPFlagDefinition, unit: !89, retainedNodes: !117)
// CHECK:STDOUT: !113 = !DILocalVariable(arg: 1, scope: !112, type: !35)
// CHECK:STDOUT: !115 = !DILocation(line: 21, column: 3, scope: !112)
// CHECK:STDOUT: !116 = !DILocation(line: 20, column: 1, scope: !112)
// CHECK:STDOUT: !117 = !{!113}
// CHECK:STDOUT:
// CHECK:STDOUT: ; ---
// CHECK:STDOUT: ; ModuleID = 'final_function.carbon'
// CHECK:STDOUT: source_filename = "final_function.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CF.Main() #0 !dbg !120 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @_CCallFn.Main.e342d6e8ff5d87ae(), !dbg !121
// CHECK:STDOUT: ret void, !dbg !122
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CCallFn.Main.e342d6e8ff5d87ae() #0 !dbg !123 {
// CHECK:STDOUT: call void @_CF.FinalFn.Main.e342d6e8ff5d87ae(), !dbg !124
// CHECK:STDOUT: ret void, !dbg !125
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CF.FinalFn.Main.e342d6e8ff5d87ae() #0 !dbg !126 {
// CHECK:STDOUT: ret void, !dbg !127
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.dbg.cu = !{!119}
// CHECK:STDOUT: !llvm.module.flags = !{!2, !3}
// CHECK:STDOUT:
// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !16 = !{null}
// CHECK:STDOUT: !17 = !DISubroutineType(types: !16)
// CHECK:STDOUT: !20 = !DIFile(filename: "final_interfaces.carbon", directory: "")
// CHECK:STDOUT: !118 = !DIFile(filename: "final_function.carbon", directory: "")
// CHECK:STDOUT: !119 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !118, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !120 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !118, line: 9, type: !17, spFlags: DISPFlagDefinition, unit: !119)
// CHECK:STDOUT: !121 = !DILocation(line: 10, column: 3, scope: !120)
// CHECK:STDOUT: !122 = !DILocation(line: 9, column: 1, scope: !120)
// CHECK:STDOUT: !123 = distinct !DISubprogram(name: "CallFn", linkageName: "_CCallFn.Main.e342d6e8ff5d87ae", scope: null, file: !20, line: 12, type: !17, spFlags: DISPFlagDefinition, unit: !119)
// CHECK:STDOUT: !124 = !DILocation(line: 13, column: 3, scope: !123)
// CHECK:STDOUT: !125 = !DILocation(line: 12, column: 1, scope: !123)
// CHECK:STDOUT: !126 = distinct !DISubprogram(name: "F", linkageName: "_CF.FinalFn.Main.e342d6e8ff5d87ae", scope: null, file: !20, line: 5, type: !17, spFlags: DISPFlagDefinition, unit: !119)
// CHECK:STDOUT: !127 = !DILocation(line: 5, column: 3, scope: !126)
// CHECK:STDOUT:
// CHECK:STDOUT: ; ---
// CHECK:STDOUT: ; ModuleID = 'final_method.carbon'
// CHECK:STDOUT: source_filename = "final_method.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: @C.val = internal constant {} zeroinitializer
// CHECK:STDOUT: @C.val.loc10_15.6 = internal constant {} zeroinitializer
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CF.Main() #0 !dbg !130 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc10_15.2.temp = alloca {}, align 1, !dbg !131
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc10_15.2.temp), !dbg !131
// CHECK:STDOUT: call void @_CCallMethod.Main.96e0ef8a617a6362(ptr @C.val.loc10_15.6), !dbg !135
// CHECK:STDOUT: call void @"_COp.08d9e38b928ba575:core.Destroy.Core"(ptr @C.val), !dbg !131
// CHECK:STDOUT: ret void, !dbg !136
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_COp.08d9e38b928ba575:core.Destroy.Core"(ptr %self) #0 !dbg !137 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !139
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CCallMethod.Main.96e0ef8a617a6362(ptr %t) #0 !dbg !141 {
// CHECK:STDOUT: call void @_CM.FinalMethod.Main.96e0ef8a617a6362(ptr %t), !dbg !144
// CHECK:STDOUT: ret void, !dbg !145
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CM.FinalMethod.Main.96e0ef8a617a6362(ptr %self) #0 !dbg !147 {
// CHECK:STDOUT: ret void, !dbg !150
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.dbg.cu = !{!129}
// CHECK:STDOUT: !llvm.module.flags = !{!2, !3}
// CHECK:STDOUT:
// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !16 = !{null}
// CHECK:STDOUT: !17 = !DISubroutineType(types: !16)
// CHECK:STDOUT: !20 = !DIFile(filename: "final_interfaces.carbon", directory: "")
// CHECK:STDOUT: !35 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
// CHECK:STDOUT: !36 = !{null, !35}
// CHECK:STDOUT: !37 = !DISubroutineType(types: !36)
// CHECK:STDOUT: !128 = !DIFile(filename: "final_method.carbon", directory: "")
// CHECK:STDOUT: !129 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !128, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !130 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !128, line: 9, type: !17, spFlags: DISPFlagDefinition, unit: !129)
// CHECK:STDOUT: !131 = !DILocation(line: 10, column: 14, scope: !130)
// CHECK:STDOUT: !135 = !DILocation(line: 11, column: 3, scope: !130)
// CHECK:STDOUT: !136 = !DILocation(line: 9, column: 1, scope: !130)
// CHECK:STDOUT: !137 = distinct !DISubprogram(name: "Op", linkageName: "_COp.08d9e38b928ba575:core.Destroy.Core", scope: null, file: !128, line: 10, type: !37, spFlags: DISPFlagDefinition, unit: !129, retainedNodes: !140)
// CHECK:STDOUT: !138 = !DILocalVariable(arg: 1, scope: !137, type: !35)
// CHECK:STDOUT: !139 = !DILocation(line: 10, column: 14, scope: !137)
// CHECK:STDOUT: !140 = !{!138}
// CHECK:STDOUT: !141 = distinct !DISubprogram(name: "CallMethod", linkageName: "_CCallMethod.Main.96e0ef8a617a6362", scope: null, file: !20, line: 16, type: !37, spFlags: DISPFlagDefinition, unit: !129, retainedNodes: !146)
// CHECK:STDOUT: !142 = !DILocalVariable(arg: 1, scope: !141, type: !35)
// CHECK:STDOUT: !144 = !DILocation(line: 17, column: 3, scope: !141)
// CHECK:STDOUT: !145 = !DILocation(line: 16, column: 1, scope: !141)
// CHECK:STDOUT: !146 = !{!142}
// CHECK:STDOUT: !147 = distinct !DISubprogram(name: "M", linkageName: "_CM.FinalMethod.Main.96e0ef8a617a6362", scope: null, file: !20, line: 9, type: !37, spFlags: DISPFlagDefinition, unit: !129, retainedNodes: !151)
// CHECK:STDOUT: !148 = !DILocalVariable(arg: 1, scope: !147, type: !35)
// CHECK:STDOUT: !150 = !DILocation(line: 9, column: 3, scope: !147)
// CHECK:STDOUT: !151 = !{!148}
// CHECK:STDOUT:
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