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carbon-lang/toolchain/lower/testdata/function/generic/call_deref_ptr.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/primitives.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_deref_ptr.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/function/generic/call_deref_ptr.carbon
// Builds on call_basic.carbon and call_impl_function.carbon.
// Test that when equivalence is found for the specific fingerprint, we don't
// conclude "equivalent" for all the call graph. This is to account for
// switching to a work-queue from recursion.
fn A[U: Core.Copy](x: U) -> U {
return x;
}
fn D[U: Core.Copy](x: U) -> U {
return x;
}
fn B[U: Core.Copy & Core.Destroy](x: U*) {
D(*x);
}
fn F[T: Core.Copy & Core.Destroy](x: T*) {
A(i32);
B(x);
}
fn M() {
var ptr_i32 : i32*;
var ptr_f64 : f64*;
F(ptr_i32);
F(ptr_f64);
}
// CHECK:STDOUT: ; ---
// CHECK:STDOUT: ; ModuleID = 'call_deref_ptr.carbon'
// CHECK:STDOUT: source_filename = "call_deref_ptr.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: %type.26 = type {}
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CM.Main() #0 !dbg !42 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %ptr_i32.var = alloca ptr, align 8, !dbg !43
// CHECK:STDOUT: %ptr_f64.var = alloca ptr, align 8, !dbg !45
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %ptr_i32.var), !dbg !43
// CHECK:STDOUT: store ptr poison, ptr %ptr_i32.var, align 8, !dbg !43
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %ptr_f64.var), !dbg !45
// CHECK:STDOUT: store ptr poison, ptr %ptr_f64.var, align 8, !dbg !45
// CHECK:STDOUT: %.loc39_5 = load ptr, ptr %ptr_i32.var, align 8, !dbg !47
// CHECK:STDOUT: call void @_CF.Main.89a3e87df6fdafe1(ptr %.loc39_5), !dbg !48
// CHECK:STDOUT: %.loc40_5 = load ptr, ptr %ptr_f64.var, align 8, !dbg !49
// CHECK:STDOUT: call void @_CF.Main.38241ddc2cd9d74d(ptr %.loc40_5), !dbg !50
// CHECK:STDOUT: ret void, !dbg !51
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_COp.f58524831c37807e: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 @"_COp.dc14d4dd21801791: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: 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 @_CF.Main.89a3e87df6fdafe1(ptr %x) #0 !dbg !60 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %A.call = call %type.26 @_CA.Main.71d6c598da8ca542(%type.26 zeroinitializer), !dbg !63
// CHECK:STDOUT: call void @_CB.Main.89a3e87df6fdafe1(ptr %x), !dbg !67
// CHECK:STDOUT: ret void, !dbg !68
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CF.Main.38241ddc2cd9d74d(ptr %x) #0 !dbg !70 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %A.call = call %type.26 @_CA.Main.71d6c598da8ca542(%type.26 zeroinitializer), !dbg !73
// CHECK:STDOUT: call void @_CB.Main.38241ddc2cd9d74d(ptr %x), !dbg !75
// CHECK:STDOUT: ret void, !dbg !76
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr %type.26 @_CA.Main.71d6c598da8ca542(%type.26 %x) #0 !dbg !78 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret %type.26 %x, !dbg !84
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CB.Main.89a3e87df6fdafe1(ptr %x) #0 !dbg !86 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc27_7.3.temp = alloca i32, align 4, !dbg !91
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc27_7.3.temp), !dbg !91
// CHECK:STDOUT: %.loc27_5.2 = load i32, ptr %x, align 4, !dbg !90
// CHECK:STDOUT: %D.call = call i32 @_CD.Main.4d6ceefeb7f772f4(i32 %.loc27_5.2), !dbg !91
// CHECK:STDOUT: store i32 %D.call, ptr %.loc27_7.3.temp, align 4, !dbg !91
// CHECK:STDOUT: call void @"_COp.f58524831c37807e:core.Destroy.Core"(ptr %.loc27_7.3.temp), !dbg !91
// CHECK:STDOUT: ret void, !dbg !94
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CB.Main.38241ddc2cd9d74d(ptr %x) #0 !dbg !96 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc27_7.3.temp = alloca double, align 8, !dbg !101
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc27_7.3.temp), !dbg !101
// CHECK:STDOUT: %.loc27_5.2 = load double, ptr %x, align 8, !dbg !100
// CHECK:STDOUT: %D.call = call double @_CD.Main.c5e4ba542a56b71f(double %.loc27_5.2), !dbg !101
// CHECK:STDOUT: store double %D.call, ptr %.loc27_7.3.temp, align 8, !dbg !101
// CHECK:STDOUT: call void @"_COp.dc14d4dd21801791:core.Destroy.Core"(ptr %.loc27_7.3.temp), !dbg !101
// CHECK:STDOUT: ret void, !dbg !102
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr i32 @_CD.Main.4d6ceefeb7f772f4(i32 %x) #0 !dbg !104 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret i32 %x, !dbg !110
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr double @_CD.Main.c5e4ba542a56b71f(double %x) #0 !dbg !112 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret double %x, !dbg !118
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; uselistorder directives
// CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 0, 1, 3, 2 }
// CHECK:STDOUT: uselistorder ptr @_CA.Main.71d6c598da8ca542, { 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 = !{!33}
// 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: !32 = !DIFile(filename: "call_deref_ptr.carbon", directory: "")
// CHECK:STDOUT: !33 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !32, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !34 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
// CHECK:STDOUT: !35 = !{null}
// CHECK:STDOUT: !36 = !DISubroutineType(types: !35)
// CHECK:STDOUT: !37 = !{null, !34}
// CHECK:STDOUT: !38 = !DISubroutineType(types: !37)
// CHECK:STDOUT: !39 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
// CHECK:STDOUT: !40 = !{null, !39}
// CHECK:STDOUT: !41 = !DISubroutineType(types: !40)
// CHECK:STDOUT: !42 = distinct !DISubprogram(name: "M", linkageName: "_CM.Main", scope: null, file: !32, line: 35, type: !36, spFlags: DISPFlagDefinition, unit: !33)
// CHECK:STDOUT: !43 = !DILocation(line: 36, column: 3, scope: !42)
// CHECK:STDOUT: !45 = !DILocation(line: 37, column: 3, scope: !42)
// CHECK:STDOUT: !47 = !DILocation(line: 39, column: 5, scope: !42)
// CHECK:STDOUT: !48 = !DILocation(line: 39, column: 3, scope: !42)
// CHECK:STDOUT: !49 = !DILocation(line: 40, column: 5, scope: !42)
// CHECK:STDOUT: !50 = !DILocation(line: 40, column: 3, scope: !42)
// CHECK:STDOUT: !51 = !DILocation(line: 35, column: 1, scope: !42)
// CHECK:STDOUT: !52 = distinct !DISubprogram(name: "Op", linkageName: "_COp.f58524831c37807e:core.Destroy.Core", scope: null, file: !32, line: 39, type: !38, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !55)
// CHECK:STDOUT: !53 = !DILocalVariable(arg: 1, scope: !52, type: !34)
// CHECK:STDOUT: !54 = !DILocation(line: 39, column: 3, scope: !52)
// CHECK:STDOUT: !55 = !{!53}
// CHECK:STDOUT: !56 = distinct !DISubprogram(name: "Op", linkageName: "_COp.dc14d4dd21801791:core.Destroy.Core", scope: null, file: !32, line: 40, type: !41, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !59)
// CHECK:STDOUT: !57 = !DILocalVariable(arg: 1, scope: !56, type: !39)
// CHECK:STDOUT: !58 = !DILocation(line: 40, column: 3, scope: !56)
// CHECK:STDOUT: !59 = !{!57}
// CHECK:STDOUT: !60 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main.89a3e87df6fdafe1", scope: null, file: !32, line: 30, type: !41, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !69)
// CHECK:STDOUT: !61 = !DILocalVariable(arg: 1, scope: !60, type: !39)
// CHECK:STDOUT: !63 = !DILocation(line: 31, column: 3, scope: !60)
// CHECK:STDOUT: !64 = !{!39, !39}
// CHECK:STDOUT: !65 = !DISubroutineType(types: !64)
// CHECK:STDOUT: !67 = !DILocation(line: 32, column: 3, scope: !60)
// CHECK:STDOUT: !68 = !DILocation(line: 30, column: 1, scope: !60)
// CHECK:STDOUT: !69 = !{!61}
// CHECK:STDOUT: !70 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main.38241ddc2cd9d74d", scope: null, file: !32, line: 30, type: !41, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !77)
// CHECK:STDOUT: !71 = !DILocalVariable(arg: 1, scope: !70, type: !39)
// CHECK:STDOUT: !73 = !DILocation(line: 31, column: 3, scope: !70)
// CHECK:STDOUT: !75 = !DILocation(line: 32, column: 3, scope: !70)
// CHECK:STDOUT: !76 = !DILocation(line: 30, column: 1, scope: !70)
// CHECK:STDOUT: !77 = !{!71}
// CHECK:STDOUT: !78 = distinct !DISubprogram(name: "A", linkageName: "_CA.Main.71d6c598da8ca542", scope: null, file: !32, line: 18, type: !65, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !85)
// CHECK:STDOUT: !79 = !DILocalVariable(arg: 1, scope: !78, type: !39)
// CHECK:STDOUT: !84 = !DILocation(line: 19, column: 3, scope: !78)
// CHECK:STDOUT: !85 = !{!79}
// CHECK:STDOUT: !86 = distinct !DISubprogram(name: "B", linkageName: "_CB.Main.89a3e87df6fdafe1", scope: null, file: !32, line: 26, type: !41, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !95)
// CHECK:STDOUT: !87 = !DILocalVariable(arg: 1, scope: !86, type: !39)
// CHECK:STDOUT: !90 = !DILocation(line: 27, column: 5, scope: !86)
// CHECK:STDOUT: !91 = !DILocation(line: 27, column: 3, scope: !86)
// CHECK:STDOUT: !92 = !{!34, !34}
// CHECK:STDOUT: !93 = !DISubroutineType(types: !92)
// CHECK:STDOUT: !94 = !DILocation(line: 26, column: 1, scope: !86)
// CHECK:STDOUT: !95 = !{!87}
// CHECK:STDOUT: !96 = distinct !DISubprogram(name: "B", linkageName: "_CB.Main.38241ddc2cd9d74d", scope: null, file: !32, line: 26, type: !41, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !103)
// CHECK:STDOUT: !97 = !DILocalVariable(arg: 1, scope: !96, type: !39)
// CHECK:STDOUT: !100 = !DILocation(line: 27, column: 5, scope: !96)
// CHECK:STDOUT: !101 = !DILocation(line: 27, column: 3, scope: !96)
// CHECK:STDOUT: !102 = !DILocation(line: 26, column: 1, scope: !96)
// CHECK:STDOUT: !103 = !{!97}
// CHECK:STDOUT: !104 = distinct !DISubprogram(name: "D", linkageName: "_CD.Main.4d6ceefeb7f772f4", scope: null, file: !32, line: 22, type: !93, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !111)
// CHECK:STDOUT: !105 = !DILocalVariable(arg: 1, scope: !104, type: !34)
// CHECK:STDOUT: !110 = !DILocation(line: 23, column: 3, scope: !104)
// CHECK:STDOUT: !111 = !{!105}
// CHECK:STDOUT: !112 = distinct !DISubprogram(name: "D", linkageName: "_CD.Main.c5e4ba542a56b71f", scope: null, file: !32, line: 22, type: !65, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !119)
// CHECK:STDOUT: !113 = !DILocalVariable(arg: 1, scope: !112, type: !39)
// CHECK:STDOUT: !118 = !DILocation(line: 23, column: 3, scope: !112)
// CHECK:STDOUT: !119 = !{!113}
// CHECK:STDOUT:
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