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https://github.com/carbon-language/carbon-lang.git
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Support for importing C++ base classes. (#5856)
For now, provide no support for virtual base classes and only minimal support for multiple inheritance.
This commit is contained in:
Richard Smith
+166
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// 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/base.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/base.carbon
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// --- structs.h
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struct A {
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int a;
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void f() {}
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};
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struct B : A {
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int b;
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};
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// --- convert.carbon
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library "[[@TEST_NAME]]";
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import Cpp library "structs.h";
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fn ConvertPtr(p: Cpp.B*) -> Cpp.A* {
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return p;
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}
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fn AcceptVal(a: Cpp.A);
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fn ConvertVal(b: Cpp.B) {
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AcceptVal(b);
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}
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// --- access_field.carbon
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library "[[@TEST_NAME]]";
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import Cpp library "structs.h";
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fn AccessVal(b: Cpp.B) -> i32 {
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return b.a;
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}
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// --- call_method.carbon
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library "[[@TEST_NAME]]";
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import Cpp library "structs.h";
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fn Call(b: Cpp.B*) {
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b->f();
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}
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// CHECK:STDOUT: ; ModuleID = 'convert.carbon'
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// CHECK:STDOUT: source_filename = "convert.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: define ptr @_CConvertPtr.Main(ptr %p) !dbg !7 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: %.loc7_11.2.base = getelementptr inbounds nuw [8 x i8], ptr %p, i32 0, i32 0, !dbg !10
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// CHECK:STDOUT: ret ptr %.loc7_11.2.base, !dbg !10
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: declare void @_CAcceptVal.Main(ptr)
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// CHECK:STDOUT:
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// CHECK:STDOUT: define void @_CConvertVal.Main(ptr %b) !dbg !11 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: %.loc13_13.1.base = getelementptr inbounds nuw [8 x i8], ptr %b, i32 0, i32 0, !dbg !12
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// CHECK:STDOUT: call void @_CAcceptVal.Main(ptr %.loc13_13.1.base), !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: !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: "convert.carbon", directory: "")
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// CHECK:STDOUT: !7 = distinct !DISubprogram(name: "ConvertPtr", linkageName: "_CConvertPtr.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: 3, scope: !7)
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// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "ConvertVal", linkageName: "_CConvertVal.Main", scope: null, file: !6, line: 12, type: !8, spFlags: DISPFlagDefinition, unit: !5)
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// CHECK:STDOUT: !12 = !DILocation(line: 13, column: 13, scope: !11)
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// CHECK:STDOUT: !13 = !DILocation(line: 13, column: 3, scope: !11)
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// CHECK:STDOUT: !14 = !DILocation(line: 12, column: 1, scope: !11)
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// CHECK:STDOUT: ; ModuleID = 'access_field.carbon'
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// CHECK:STDOUT: source_filename = "access_field.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: define i32 @_CAccessVal.Main(ptr %b) !dbg !7 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: %.loc7_11.1.base = getelementptr inbounds nuw [8 x i8], ptr %b, i32 0, i32 0, !dbg !10
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// CHECK:STDOUT: %.loc7_11.3.a = getelementptr inbounds nuw [4 x i8], ptr %.loc7_11.1.base, i32 0, i32 0, !dbg !10
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// CHECK:STDOUT: %.loc7_11.4 = load i32, ptr %.loc7_11.3.a, align 4, !dbg !10
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// CHECK:STDOUT: ret i32 %.loc7_11.4, !dbg !11
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// CHECK:STDOUT: }
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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: "access_field.carbon", directory: "")
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// CHECK:STDOUT: !7 = distinct !DISubprogram(name: "AccessVal", linkageName: "_CAccessVal.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: ; ModuleID = 'call_method.carbon'
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// CHECK:STDOUT: source_filename = "call_method.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: $_ZN1A1fEv = comdat any
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// CHECK:STDOUT:
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// CHECK:STDOUT: define void @_CCall.Main(ptr %b) !dbg !7 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: %.loc7_4.3.base = getelementptr inbounds nuw [8 x i8], ptr %b, i32 0, i32 0, !dbg !10
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// CHECK:STDOUT: call void @_ZN1A1fEv(ptr %.loc7_4.3.base), !dbg !10
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// CHECK:STDOUT: ret void, !dbg !11
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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 @_ZN1A1fEv(ptr nonnull align 4 dereferenceable(4) %this) #0 comdat align 2 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: %this.addr = alloca ptr, align 8
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// CHECK:STDOUT: store ptr %this, ptr %this.addr, align 8
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// CHECK:STDOUT: %this1 = load ptr, ptr %this.addr, align 8
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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:
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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_method.carbon", directory: "")
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// CHECK:STDOUT: !7 = distinct !DISubprogram(name: "Call", linkageName: "_CCall.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: 3, scope: !7)
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// CHECK:STDOUT: !11 = !DILocation(line: 6, column: 1, scope: !7)
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