05782218ab
This change simplifies code that has to deal with DIGlobalVariableExpression and mirrors how we treat DIExpressions in debug info intrinsics. Before this change there were two ways of representing empty expressions on globals, a nullptr and an empty !DIExpression(). If someone needs to upgrade out-of-tree testcases: perl -pi -e 's/(!DIGlobalVariableExpression\(var: ![0-9]*)\)/\1, expr: !DIExpression())/g' <MYTEST.ll> will catch 95%. llvm-svn: 312144
67 lines
3.6 KiB
LLVM
67 lines
3.6 KiB
LLVM
; RUN: opt -run-twice -verify -disable-debug-info-type-map -S -o - %s | FileCheck %s
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; Generated using:
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; $ cat p.cpp
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; void sink(void *);
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; class A {
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; public:
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; template <typename> void m_fn2() { static int a; }
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; virtual void m_fn1();
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; };
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; void foo() {
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; class B : public A {
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; public:
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; B() { m_fn2<B>(); }
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; };
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; sink(new B);
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; }
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; $ clang++ -target x86_64-unknown-linux -fvisibility=hidden -O2 -g2 -flto -S p.cpp -o p.ll
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; # then manually removed function/gv definitions
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; Test that when the module is cloned it does not contain a reference to
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; the original DICompileUnit as a result of a collision between the cloned
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; DISubprogram for m_fn2<B> (which refers to the non-ODR entity B via
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; template parameters) and the original DISubprogram.
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; CHECK: DICompileUnit
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; CHECK-NOT: DICompileUnit
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux"
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!28, !29}
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!llvm.ident = !{!30}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 5.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !3)
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!1 = !DIFile(filename: "p.cpp", directory: "/usr/local/google/home/pcc/b682773-2-repro/small2")
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!2 = !{}
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!3 = !{!4}
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!4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression())
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!5 = distinct !DIGlobalVariable(name: "a", scope: !6, file: !1, line: 5, type: !27, isLocal: true, isDefinition: true)
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!6 = distinct !DISubprogram(name: "m_fn2<B>", linkageName: "_ZN1A5m_fn2IZ3foovE1BEEvv", scope: !7, file: !1, line: 5, type: !8, isLocal: true, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, templateParams: !11, declaration: !23, variables: !24)
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!7 = !DICompositeType(tag: DW_TAG_class_type, name: "A", file: !1, line: 3, flags: DIFlagFwdDecl, identifier: "_ZTS1A")
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!8 = !DISubroutineType(types: !9)
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!9 = !{null, !10}
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!10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
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!11 = !{!12}
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!12 = !DITemplateTypeParameter(type: !13)
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!13 = distinct !DICompositeType(tag: DW_TAG_class_type, name: "B", scope: !14, file: !1, line: 10, size: 64, elements: !17, vtableHolder: !7)
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!14 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foov", scope: !1, file: !1, line: 9, type: !15, isLocal: false, isDefinition: true, scopeLine: 9, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !2)
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!15 = !DISubroutineType(types: !16)
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!16 = !{null}
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!17 = !{!18, !19}
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!18 = !DIDerivedType(tag: DW_TAG_inheritance, scope: !13, baseType: !7, flags: DIFlagPublic)
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!19 = !DISubprogram(name: "B", scope: !13, file: !1, line: 12, type: !20, isLocal: false, isDefinition: false, scopeLine: 12, flags: DIFlagPublic | DIFlagPrototyped, isOptimized: true)
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!20 = !DISubroutineType(types: !21)
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!21 = !{null, !22}
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!22 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
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!23 = !DISubprogram(name: "m_fn2<B>", linkageName: "_ZN1A5m_fn2IZ3foovE1BEEvv", scope: !7, file: !1, line: 5, type: !8, isLocal: false, isDefinition: false, scopeLine: 5, flags: DIFlagPublic | DIFlagPrototyped, isOptimized: true, templateParams: !11)
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!24 = !{!25}
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!25 = !DILocalVariable(name: "this", arg: 1, scope: !6, type: !26, flags: DIFlagArtificial | DIFlagObjectPointer)
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!26 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64)
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!27 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!28 = !{i32 2, !"Dwarf Version", i32 4}
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!29 = !{i32 2, !"Debug Info Version", i32 3}
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!30 = !{!"clang version 5.0.0 "}
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