forked from OSchip/llvm-project
[DWARF5] Added support for DW_AT_noreturn attribute to be emitted for
C++ class member functions. Patch by Sourabh Singh Tomar! Differential Revision: https://reviews.llvm.org/D68697 llvm-svn: 375012
This commit is contained in:
Adrian Prantl
parent
0216a3c6d1
commit
a9cfde1f6a
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@ -1605,6 +1605,8 @@ llvm::DISubprogram *CGDebugInfo::CreateCXXMemberFunction(
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ContainingType = RecordTy;
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}
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if (Method->isNoReturn())
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Flags |= llvm::DINode::FlagNoReturn;
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if (Method->isStatic())
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Flags |= llvm::DINode::FlagStaticMember;
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if (Method->isImplicit())
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@ -0,0 +1,19 @@
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// RUN: %clang_cc1 -std=c++11 -emit-llvm -fcxx-exceptions -debug-info-kind=standalone %s -o - | FileCheck %s
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// Test for NoReturn flags in debug info.
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// CHECK: DISubprogram(name: "f", {{.*}}, flags: DIFlagPrototyped | DIFlagNoReturn, spFlags: DISPFlagDefinition
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// CHECK: DISubprogram(name: "foo_member", {{.*}}, flags: DIFlagPrototyped | DIFlagNoReturn, spFlags: 0
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// CHECK-NOT: DISubprogram(name: "func",{{.*}}, flags: DIFlagPrototyped | DIFlagNoReturn, spFlags: DISPFlagDefinition
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class foo {
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[[noreturn]] void foo_member() { throw 1; }
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};
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[[noreturn]] void f() {
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throw 1;
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}
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void func() {
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foo object;
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}
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@ -2,56 +2,88 @@
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; REQUIRES: object-emission
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; Generated by clang++ -S -c -std=c++11 --emit-llvm -g from the following C++11 source:
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; [[ noreturn ]] void f() {
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; throw 1;
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; }
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;class foo {
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;[[noreturn]] void foo_member(){throw 1;}
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;};
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;
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;[[ noreturn ]] void f() {
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; throw 1;
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;}
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;
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;void func(){
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; foo object;
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;}
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; CHECK: DW_TAG_subprogram
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_name{{.*}}"f"
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_noreturn
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; CHECK: DW_TAG_class_type
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; CHECK: DW_TAG_subprogram
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; CHECK: DW_AT_name{{.*}}"foo_member"
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; CHECK: DW_AT_noreturn
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; ModuleID = 'test.cpp'
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source_filename = "test.cpp"
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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source_filename = "noreturn1.cpp"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@_ZTIi = external constant i8*
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%class.foo = type { i8 }
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; Function Attrs: noreturn
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define void @_Z1fv() #0 !dbg !6 {
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entry:
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%exception = call i8* @__cxa_allocate_exception(i64 4) #1, !dbg !9
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%0 = bitcast i8* %exception to i32*, !dbg !9
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store i32 1, i32* %0, align 16, !dbg !9
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call void @__cxa_throw(i8* %exception, i8* bitcast (i8** @_ZTIi to i8*), i8* null) #2, !dbg !10
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unreachable, !dbg !9
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@_ZTIi = external dso_local constant i8*
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return: ; No predecessors!
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ret void, !dbg !12
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; Function Attrs: noinline noreturn optnone uwtable
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define dso_local void @_Z1fv() #0 !dbg !7 {
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%1 = call i8* @__cxa_allocate_exception(i64 4) #3, !dbg !10
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%2 = bitcast i8* %1 to i32*, !dbg !10
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store i32 1, i32* %2, align 16, !dbg !10
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call void @__cxa_throw(i8* %1, i8* bitcast (i8** @_ZTIi to i8*), i8* null) #4, !dbg !10
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unreachable, !dbg !10
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}
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declare i8* @__cxa_allocate_exception(i64)
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declare dso_local i8* @__cxa_allocate_exception(i64)
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declare void @__cxa_throw(i8*, i8*, i8*)
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declare dso_local void @__cxa_throw(i8*, i8*, i8*)
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attributes #0 = { noreturn }
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; Function Attrs: noinline nounwind optnone uwtable
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define dso_local void @_Z4funcv() #1 !dbg !11 {
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%1 = alloca %class.foo, align 1
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call void @llvm.dbg.declare(metadata %class.foo* %1, metadata !12, metadata !DIExpression()), !dbg !19
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ret void, !dbg !20
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}
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #2
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attributes #0 = { noinline noreturn optnone uwtable }
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attributes #1 = { noinline nounwind optnone uwtable }
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attributes #2 = { nounwind readnone speculatable willreturn }
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attributes #3 = { nounwind }
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attributes #4 = { noreturn }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!llvm.ident = !{!5}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 4.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "test.cpp", directory: "/home/del/test")
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_11, file: !1, producer: "clang version 10.0.0 (https://github.com/llvm/llvm-project.git 3fcdd25ad5566114ac3322dcbf71d3c38bfec1ed)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
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!1 = !DIFile(filename: "test.cpp", directory: "/home/sourabh/work/dwarf/c_c++/c++11")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{!"clang version 4.0.0"}
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!6 = distinct !DISubprogram(name: "f", linkageName: "_Z1fv", scope: !1, file: !1, line: 1, type: !7, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped | DIFlagNoReturn, isOptimized: false, unit: !0, retainedNodes: !2)
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!7 = !DISubroutineType(types: !8)
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!8 = !{null}
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!9 = !DILocation(line: 2, column: 5, scope: !6)
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!10 = !DILocation(line: 2, column: 5, scope: !11)
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!11 = !DILexicalBlockFile(scope: !6, file: !1, discriminator: 1)
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!12 = !DILocation(line: 3, column: 1, scope: !6)
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git 3fcdd25ad5566114ac3322dcbf71d3c38bfec1ed)"}
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!7 = distinct !DISubprogram(name: "f", linkageName: "_Z1fv", scope: !1, file: !1, line: 5, type: !8, scopeLine: 5, flags: DIFlagPrototyped | DIFlagNoReturn, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
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!8 = !DISubroutineType(types: !9)
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!9 = !{null}
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!10 = !DILocation(line: 6, column: 5, scope: !7)
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!11 = distinct !DISubprogram(name: "func", linkageName: "_Z4funcv", scope: !1, file: !1, line: 9, type: !8, scopeLine: 9, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
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!12 = !DILocalVariable(name: "object", scope: !11, file: !1, line: 10, type: !13)
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!13 = distinct !DICompositeType(tag: DW_TAG_class_type, name: "foo", file: !1, line: 1, size: 8, flags: DIFlagTypePassByValue, elements: !14, identifier: "_ZTS3foo")
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!14 = !{!15}
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!15 = !DISubprogram(name: "foo_member", linkageName: "_ZN3foo10foo_memberEv", scope: !13, file: !1, line: 2, type: !16, scopeLine: 2, flags: DIFlagPrototyped | DIFlagNoReturn, spFlags: 0)
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!16 = !DISubroutineType(types: !17)
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!17 = !{null, !18}
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!18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
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!19 = !DILocation(line: 10, column: 9, scope: !11)
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!20 = !DILocation(line: 11, column: 1, scope: !11)
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