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carbon-lang/toolchain/lower/testdata/function/generic/call_method.carbon
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Christopher Di Bella f7cd39428e Add Destroy.SubobjectDestroy as a temporary replacement for Destroy.Op (#7773) 
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
2026-09-24 00:06:28 +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/int.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/lower/testdata/function/generic/call_method.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/function/generic/call_method.carbon
class C {
fn F[T: Core.Copy](unused self, x: T) -> T {
return x;
}
}
fn CallF() -> i32 {
var c: C = {};
var n: i32 = 0;
return c.F(n);
}
// CHECK:STDOUT: ; ---
// CHECK:STDOUT: ; ModuleID = 'call_method.carbon'
// CHECK:STDOUT: source_filename = "call_method.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: @C.val.loc20_3 = internal constant {} zeroinitializer
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define i32 @_CCallF.Main() #0 !dbg !28 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %c.var = alloca {}, align 1, !dbg !31
// CHECK:STDOUT: %n.var = alloca i32, align 4, !dbg !33
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %c.var), !dbg !31
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 1 %c.var, ptr align 1 @C.val.loc20_3, i64 0, i1 false), !dbg !31
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %n.var), !dbg !33
// CHECK:STDOUT: store i32 0, ptr %n.var, align 4, !dbg !33
// CHECK:STDOUT: %.loc22_14 = load i32, ptr %n.var, align 4, !dbg !36
// CHECK:STDOUT: %C.F.call = call i32 @_CF.C.Main.4d6ceefeb7f772f4(ptr %c.var, i32 %.loc22_14), !dbg !35
// CHECK:STDOUT: call void @"_CSelfDestruct.f58524831c37807e:core.Destroy.Core"(ptr %n.var), !dbg !33
// CHECK:STDOUT: call void @"_CSelfDestruct.08d9e38b928ba575:core.Destroy.Core"(ptr %c.var), !dbg !31
// CHECK:STDOUT: ret i32 %C.F.call, !dbg !39
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_CSelfDestruct.6dae29ece9a708c4:core.Destroy.Core"(ptr %self) #0 !dbg !40 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !42
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_CSubobjectDestroy.f58524831c37807e:core.Destroy.Core"(ptr %self) #0 !dbg !44 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !46
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_CSelfDestruct.f58524831c37807e:core.Destroy.Core"(ptr %self) #0 !dbg !48 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @"_CSubobjectDestroy.f58524831c37807e:core.Destroy.Core"(ptr %self), !dbg !50
// CHECK:STDOUT: ret void, !dbg !50
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_CSelfDestruct.cb8adced19392b99:core.Destroy.Core"(ptr %self) #0 !dbg !52 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !54
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_CSubobjectDestroy.08d9e38b928ba575:core.Destroy.Core"(ptr %self) #0 !dbg !56 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !58
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_CSelfDestruct.08d9e38b928ba575:core.Destroy.Core"(ptr %self) #0 !dbg !60 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @"_CSubobjectDestroy.08d9e38b928ba575:core.Destroy.Core"(ptr %self), !dbg !62
// CHECK:STDOUT: ret void, !dbg !62
// 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.memcpy.p0.p0.i64(ptr noalias writeonly captures(none), ptr noalias readonly captures(none), i64, i1 immarg) #1
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr i32 @_CF.C.Main.4d6ceefeb7f772f4(ptr %self, i32 %x) #0 !dbg !64 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret i32 %x, !dbg !72
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; uselistorder directives
// CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 1, 0 }
// 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 = !{!19}
// 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: !18 = !DIFile(filename: "call_method.carbon", directory: "")
// CHECK:STDOUT: !19 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !18, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !20 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
// CHECK:STDOUT: !21 = !{!20}
// CHECK:STDOUT: !22 = !DISubroutineType(types: !21)
// CHECK:STDOUT: !23 = !{null, !20}
// CHECK:STDOUT: !24 = !DISubroutineType(types: !23)
// CHECK:STDOUT: !25 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
// CHECK:STDOUT: !26 = !{null, !25}
// CHECK:STDOUT: !27 = !DISubroutineType(types: !26)
// CHECK:STDOUT: !28 = distinct !DISubprogram(name: "CallF", linkageName: "_CCallF.Main", scope: null, file: !18, line: 19, type: !22, spFlags: DISPFlagDefinition, unit: !19)
// CHECK:STDOUT: !31 = !DILocation(line: 20, column: 3, scope: !28)
// CHECK:STDOUT: !33 = !DILocation(line: 21, column: 3, scope: !28)
// CHECK:STDOUT: !35 = !DILocation(line: 22, column: 10, scope: !28)
// CHECK:STDOUT: !36 = !DILocation(line: 22, column: 14, scope: !28)
// CHECK:STDOUT: !37 = !{!20, !25, !20}
// CHECK:STDOUT: !38 = !DISubroutineType(types: !37)
// CHECK:STDOUT: !39 = !DILocation(line: 22, column: 3, scope: !28)
// CHECK:STDOUT: !40 = distinct !DISubprogram(name: "SelfDestruct", linkageName: "_CSelfDestruct.6dae29ece9a708c4:core.Destroy.Core", scope: null, file: !18, line: 21, type: !24, spFlags: DISPFlagDefinition, unit: !19, retainedNodes: !43)
// CHECK:STDOUT: !41 = !DILocalVariable(arg: 1, scope: !40, type: !20)
// CHECK:STDOUT: !42 = !DILocation(line: 21, column: 3, scope: !40)
// CHECK:STDOUT: !43 = !{!41}
// CHECK:STDOUT: !44 = distinct !DISubprogram(name: "SubobjectDestroy", linkageName: "_CSubobjectDestroy.f58524831c37807e:core.Destroy.Core", scope: null, file: !18, line: 21, type: !24, spFlags: DISPFlagDefinition, unit: !19, retainedNodes: !47)
// CHECK:STDOUT: !45 = !DILocalVariable(arg: 1, scope: !44, type: !20)
// CHECK:STDOUT: !46 = !DILocation(line: 21, column: 3, scope: !44)
// CHECK:STDOUT: !47 = !{!45}
// CHECK:STDOUT: !48 = distinct !DISubprogram(name: "SelfDestruct", linkageName: "_CSelfDestruct.f58524831c37807e:core.Destroy.Core", scope: null, file: !18, line: 21, type: !24, spFlags: DISPFlagDefinition, unit: !19, retainedNodes: !51)
// CHECK:STDOUT: !49 = !DILocalVariable(arg: 1, scope: !48, type: !20)
// CHECK:STDOUT: !50 = !DILocation(line: 21, column: 3, scope: !48)
// CHECK:STDOUT: !51 = !{!49}
// CHECK:STDOUT: !52 = distinct !DISubprogram(name: "SelfDestruct", linkageName: "_CSelfDestruct.cb8adced19392b99:core.Destroy.Core", scope: null, file: !18, line: 20, type: !27, spFlags: DISPFlagDefinition, unit: !19, retainedNodes: !55)
// CHECK:STDOUT: !53 = !DILocalVariable(arg: 1, scope: !52, type: !25)
// CHECK:STDOUT: !54 = !DILocation(line: 20, column: 3, scope: !52)
// CHECK:STDOUT: !55 = !{!53}
// CHECK:STDOUT: !56 = distinct !DISubprogram(name: "SubobjectDestroy", linkageName: "_CSubobjectDestroy.08d9e38b928ba575:core.Destroy.Core", scope: null, file: !18, line: 20, type: !27, spFlags: DISPFlagDefinition, unit: !19, retainedNodes: !59)
// CHECK:STDOUT: !57 = !DILocalVariable(arg: 1, scope: !56, type: !25)
// CHECK:STDOUT: !58 = !DILocation(line: 20, column: 3, scope: !56)
// CHECK:STDOUT: !59 = !{!57}
// CHECK:STDOUT: !60 = distinct !DISubprogram(name: "SelfDestruct", linkageName: "_CSelfDestruct.08d9e38b928ba575:core.Destroy.Core", scope: null, file: !18, line: 20, type: !27, spFlags: DISPFlagDefinition, unit: !19, retainedNodes: !63)
// CHECK:STDOUT: !61 = !DILocalVariable(arg: 1, scope: !60, type: !25)
// CHECK:STDOUT: !62 = !DILocation(line: 20, column: 3, scope: !60)
// CHECK:STDOUT: !63 = !{!61}
// CHECK:STDOUT: !64 = distinct !DISubprogram(name: "F", linkageName: "_CF.C.Main.4d6ceefeb7f772f4", scope: null, file: !18, line: 14, type: !38, spFlags: DISPFlagDefinition, unit: !19, retainedNodes: !73)
// CHECK:STDOUT: !65 = !DILocalVariable(arg: 1, scope: !64, type: !25)
// CHECK:STDOUT: !66 = !DILocalVariable(arg: 2, scope: !64, type: !20)
// CHECK:STDOUT: !72 = !DILocation(line: 15, column: 5, scope: !64)
// CHECK:STDOUT: !73 = !{!65, !66}
// CHECK:STDOUT:
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