mirror of
https://github.com/carbon-language/carbon-lang.git
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Richard SmithandJon Ross-Perkins
1e7b7e53ae
The general strategy here is to force use of a thunk when we want to use default arguments, and have Clang generate uses of the default arguments on its side of the thunk. To support this, change the key type used in `clang_decls` from being just a `Decl*` to being a pair of `Decl*` and number of parameters in the case of function decls. Import distinct `SemIR::Function`s for each number of parameters that's used, and corresponding distinct thunks. --------- Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
108 lines
5.2 KiB
Plaintext
108 lines
5.2 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/int.carbon
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//
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// AUTOUPDATE
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// TIP: To test this file alone, run:
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// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/lower/testdata/interop/cpp/template.carbon
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// TIP: To dump output, run:
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// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/interop/cpp/template.carbon
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// --- function_template.h
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template<typename T> T identity(T x) { return x; }
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class Class {};
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// --- call.carbon
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library "[[@TEST_NAME]]";
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import Cpp library "function_template.h";
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fn PassI32(a: i32) -> i32 {
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return Cpp.identity(a);
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}
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fn PassClass(a: Cpp.Class) -> Cpp.Class {
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return Cpp.identity(a);
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}
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// CHECK:STDOUT: ; ModuleID = 'call.carbon'
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// CHECK:STDOUT: source_filename = "call.carbon"
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// CHECK:STDOUT: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
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// CHECK:STDOUT: target triple = "x86_64-unknown-linux-gnu"
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// CHECK:STDOUT:
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// CHECK:STDOUT: %class.Class = type { i8 }
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// CHECK:STDOUT:
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// CHECK:STDOUT: $_Z8identityIiET_S0_ = comdat any
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// CHECK:STDOUT:
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// CHECK:STDOUT: $_Z8identityI5ClassET_S1_ = comdat any
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// CHECK:STDOUT:
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// CHECK:STDOUT: define i32 @_CPassI32.Main(i32 %a) !dbg !7 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: %identity.call = call i32 @_Z8identityIiET_S0_(i32 %a), !dbg !10
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// CHECK:STDOUT: ret i32 %identity.call, !dbg !11
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: define void @_CPassClass.Main(ptr sret({}) %return, ptr %a) !dbg !12 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: call void @_Z8identityI5ClassET_S1_.carbon_thunk(ptr %a, ptr %return), !dbg !13
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// CHECK:STDOUT: ret void, !dbg !14
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: ; Function Attrs: mustprogress noinline nounwind optnone
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// CHECK:STDOUT: define linkonce_odr dso_local i32 @_Z8identityIiET_S0_(i32 %x) #0 comdat {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: %x.addr = alloca i32, align 4
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// CHECK:STDOUT: store i32 %x, ptr %x.addr, align 4
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// CHECK:STDOUT: %0 = load i32, ptr %x.addr, align 4
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// CHECK:STDOUT: ret i32 %0
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress
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// CHECK:STDOUT: define dso_local void @_Z8identityI5ClassET_S1_.carbon_thunk(ptr %x, ptr %return) #1 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: %x.addr = alloca ptr, align 8
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// CHECK:STDOUT: %return.addr = alloca ptr, align 8
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// CHECK:STDOUT: %agg.tmp = alloca %class.Class, align 1
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// CHECK:STDOUT: %undef.agg.tmp = alloca %class.Class, align 1
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// CHECK:STDOUT: store ptr %x, ptr %x.addr, align 8
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// CHECK:STDOUT: store ptr %return, ptr %return.addr, align 8
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// CHECK:STDOUT: %0 = load ptr, ptr %return.addr, align 8
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// CHECK:STDOUT: %1 = load ptr, ptr %x.addr, align 8
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// CHECK:STDOUT: call void @_Z8identityI5ClassET_S1_()
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// CHECK:STDOUT: ret void
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: ; Function Attrs: mustprogress noinline nounwind optnone
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// CHECK:STDOUT: define linkonce_odr dso_local void @_Z8identityI5ClassET_S1_() #0 comdat {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: %x = alloca %class.Class, align 1
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// CHECK:STDOUT: ret void
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: attributes #0 = { mustprogress noinline nounwind optnone "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="0" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
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// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="0" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
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// CHECK:STDOUT:
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// CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
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// CHECK:STDOUT: !llvm.dbg.cu = !{!5}
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// CHECK:STDOUT:
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// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
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// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
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// CHECK:STDOUT: !2 = !{i32 1, !"wchar_size", i32 4}
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// CHECK:STDOUT: !3 = !{i32 8, !"PIC Level", i32 0}
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// CHECK:STDOUT: !4 = !{i32 7, !"PIE Level", i32 2}
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// CHECK:STDOUT: !5 = distinct !DICompileUnit(language: DW_LANG_C, file: !6, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
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// CHECK:STDOUT: !6 = !DIFile(filename: "call.carbon", directory: "")
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// CHECK:STDOUT: !7 = distinct !DISubprogram(name: "PassI32", linkageName: "_CPassI32.Main", scope: null, file: !6, line: 6, type: !8, spFlags: DISPFlagDefinition, unit: !5)
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// CHECK:STDOUT: !8 = !DISubroutineType(types: !9)
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// CHECK:STDOUT: !9 = !{}
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// CHECK:STDOUT: !10 = !DILocation(line: 7, column: 10, scope: !7)
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// CHECK:STDOUT: !11 = !DILocation(line: 7, column: 3, scope: !7)
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// CHECK:STDOUT: !12 = distinct !DISubprogram(name: "PassClass", linkageName: "_CPassClass.Main", scope: null, file: !6, line: 10, type: !8, spFlags: DISPFlagDefinition, unit: !5)
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// CHECK:STDOUT: !13 = !DILocation(line: 11, column: 10, scope: !12)
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// CHECK:STDOUT: !14 = !DILocation(line: 11, column: 3, scope: !12)
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