diff options
Diffstat (limited to 'llvm/test/DebugInfo/Generic/missing-abstract-variable.ll')
| -rw-r--r-- | llvm/test/DebugInfo/Generic/missing-abstract-variable.ll | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/llvm/test/DebugInfo/Generic/missing-abstract-variable.ll b/llvm/test/DebugInfo/Generic/missing-abstract-variable.ll new file mode 100644 index 00000000000..0ebb5a28edc --- /dev/null +++ b/llvm/test/DebugInfo/Generic/missing-abstract-variable.ll @@ -0,0 +1,182 @@ +; REQUIRES: object-emission + +; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s + +; The formal parameter 'b' for Function 'x' when inlined within 'a' is lost on +; mips and powerpc64 (and on x86_64 at at least -O2). Presumably this is a +; SelectionDAG issue (do mips/powerpc64 use FastISel?). +; XFAIL: mips, powerpc64, s390x, sparc + +; Build from the following source with clang -O2. + +; The important details are that 'x's abstract definition is first built during +; the definition of 'b', where the parameter to 'x' is constant and so 'x's 's' +; variable is optimized away. No abstract definition DIE for 's' is constructed. +; Then, during 'a' emission, the abstract DbgVariable for 's' is created, but +; the abstract DIE isn't (since the abstract definition for 'b' is already +; built). This results in 's' inlined in 'a' being emitted with its name, line, +; file there, rather than referencing an abstract definition. + +; extern int t; +; +; void f(int); +; +; inline void x(bool b) { +; if (b) { +; int s = t; +; f(s); +; } +; f(0); +; } +; +; void b() { +; x(false); +; } +; +; void a(bool u) { +; x(u); +; } + +; CHECK: [[X_DECL:.*]]: DW_TAG_subprogram +; CHECK-NOT: DW_TAG +; CHECK: DW_AT_name {{.*}} "x" +; CHECK-NOT: {{DW_TAG|NULL}} +; CHECK: DW_TAG_formal_parameter +; CHECK-NOT: DW_TAG +; CHECK: DW_AT_name {{.*}} "b" +; CHECK-NOT: {{DW_TAG|NULL}} +; CHECK: DW_TAG_lexical_block +; CHECK-NOT: {{DW_TAG|NULL}} +; CHECK: DW_TAG_variable +; CHECK-NOT: DW_TAG +; CHECK: DW_AT_name {{.*}} "s" + +; CHECK: DW_TAG_subprogram +; CHECK-NOT: DW_TAG +; CHECK: DW_AT_name {{.*}} "b" +; CHECK-NOT: {{DW_TAG|NULL}} +; CHECK: DW_TAG_inlined_subroutine +; CHECK-NOT: DW_TAG +; CHECK: DW_AT_abstract_origin {{.*}} {[[X_DECL]]} +; CHECK-NOT: {{DW_TAG|NULL}} +; CHECK: DW_TAG_formal_parameter +; CHECK-NOT: DW_TAG +; CHECK: DW_AT_abstract_origin {{.*}} "b" +; Notice 'x's local variable 's' is missing. Not necessarily a bug here, +; since it's been optimized entirely away and it should be described in +; abstract subprogram. +; CHECK-NOT: DW_TAG +; CHECK: NULL +; CHECK-NOT: DW_TAG +; CHECK: NULL + +; CHECK: DW_TAG_subprogram +; CHECK-NOT: DW_TAG +; CHECK: DW_AT_name {{.*}} "a" +; CHECK-NOT: {{DW_TAG|NULL}} +; CHECK: DW_TAG_formal_parameter +; CHECK-NOT: {{DW_TAG|NULL}} +; CHECK: DW_TAG_inlined_subroutine +; CHECK-NOT: DW_TAG +; CHECK: DW_AT_abstract_origin {{.*}} {[[X_DECL]]} +; CHECK-NOT: {{DW_TAG|NULL}} +; FIXME: This formal parameter goes missing at least at -O2 (& on +; mips/powerpc), maybe before that. Perhaps SelectionDAG is to blame (and +; fastisel succeeds). +; CHECK: DW_TAG_formal_parameter +; CHECK-NOT: DW_TAG +; CHECK: DW_AT_abstract_origin {{.*}} "b" + +; CHECK-NOT: {{DW_TAG|NULL}} +; CHECK: DW_TAG_lexical_block +; CHECK-NOT: {{DW_TAG|NULL}} +; CHECK: DW_TAG_variable +; CHECK-NOT: DW_TAG +; CHECK: DW_AT_abstract_origin {{.*}} "s" + +@t = external global i32 + +; Function Attrs: uwtable +define void @_Z1bv() #0 { +entry: + tail call void @llvm.dbg.value(metadata i1 false, i64 0, metadata !25, metadata !DIExpression()), !dbg !27 + tail call void @_Z1fi(i32 0), !dbg !28 + ret void, !dbg !29 +} + +; Function Attrs: uwtable +define void @_Z1ab(i1 zeroext %u) #0 { +entry: + tail call void @llvm.dbg.value(metadata i1 %u, i64 0, metadata !13, metadata !DIExpression()), !dbg !30 + tail call void @llvm.dbg.value(metadata i1 %u, i64 0, metadata !31, metadata !DIExpression()), !dbg !33 + br i1 %u, label %if.then.i, label %_Z1xb.exit, !dbg !34 + +if.then.i: ; preds = %entry + %0 = load i32, i32* @t, align 4, !dbg !35, !tbaa !36 + tail call void @llvm.dbg.value(metadata i32 %0, i64 0, metadata !40, metadata !DIExpression()), !dbg !35 + tail call void @_Z1fi(i32 %0), !dbg !41 + br label %_Z1xb.exit, !dbg !42 + +_Z1xb.exit: ; preds = %entry, %if.then.i + tail call void @_Z1fi(i32 0), !dbg !43 + ret void, !dbg !44 +} + +declare void @_Z1fi(i32) #1 + +; Function Attrs: nounwind readnone +declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2 + +attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } +attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } +attributes #2 = { nounwind readnone } + +!llvm.dbg.cu = !{!0} +!llvm.module.flags = !{!21, !22} +!llvm.ident = !{!23} + +!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: true, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2) +!1 = !DIFile(filename: "missing-abstract-variables.cc", directory: "/tmp/dbginfo") +!2 = !{} +!3 = !{!4, !8, !14} +!4 = distinct !DISubprogram(name: "b", linkageName: "_Z1bv", line: 13, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 13, file: !1, scope: !5, type: !6, function: void ()* @_Z1bv, variables: !2) +!5 = !DIFile(filename: "missing-abstract-variables.cc", directory: "/tmp/dbginfo") +!6 = !DISubroutineType(types: !7) +!7 = !{null} +!8 = distinct !DISubprogram(name: "a", linkageName: "_Z1ab", line: 17, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 17, file: !1, scope: !5, type: !9, function: void (i1)* @_Z1ab, variables: !12) +!9 = !DISubroutineType(types: !10) +!10 = !{null, !11} +!11 = !DIBasicType(tag: DW_TAG_base_type, name: "bool", size: 8, align: 8, encoding: DW_ATE_boolean) +!12 = !{!13} +!13 = !DILocalVariable(name: "u", line: 17, arg: 1, scope: !8, file: !5, type: !11) +!14 = distinct !DISubprogram(name: "x", linkageName: "_Z1xb", line: 5, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 5, file: !1, scope: !5, type: !9, variables: !15) +!15 = !{!16, !17} +!16 = !DILocalVariable(name: "b", line: 5, arg: 1, scope: !14, file: !5, type: !11) +!17 = !DILocalVariable(name: "s", line: 7, scope: !18, file: !5, type: !20) +!18 = distinct !DILexicalBlock(line: 6, column: 0, file: !1, scope: !19) +!19 = distinct !DILexicalBlock(line: 6, column: 0, file: !1, scope: !14) +!20 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) +!21 = !{i32 2, !"Dwarf Version", i32 4} +!22 = !{i32 2, !"Debug Info Version", i32 3} +!23 = !{!"clang version 3.5.0 "} +!24 = !{i1 false} +!25 = !DILocalVariable(name: "b", line: 5, arg: 1, scope: !14, file: !5, type: !11) +!26 = !DILocation(line: 14, scope: !4) +!27 = !DILocation(line: 5, scope: !14, inlinedAt: !26) +!28 = !DILocation(line: 10, scope: !14, inlinedAt: !26) +!29 = !DILocation(line: 15, scope: !4) +!30 = !DILocation(line: 17, scope: !8) +!31 = !DILocalVariable(name: "b", line: 5, arg: 1, scope: !14, file: !5, type: !11) +!32 = !DILocation(line: 18, scope: !8) +!33 = !DILocation(line: 5, scope: !14, inlinedAt: !32) +!34 = !DILocation(line: 6, scope: !19, inlinedAt: !32) +!35 = !DILocation(line: 7, scope: !18, inlinedAt: !32) +!36 = !{!37, !37, i64 0} +!37 = !{!"int", !38, i64 0} +!38 = !{!"omnipotent char", !39, i64 0} +!39 = !{!"Simple C/C++ TBAA"} +!40 = !DILocalVariable(name: "s", line: 7, scope: !18, file: !5, type: !20) +!41 = !DILocation(line: 8, scope: !18, inlinedAt: !32) +!42 = !DILocation(line: 9, scope: !18, inlinedAt: !32) +!43 = !DILocation(line: 10, scope: !14, inlinedAt: !32) +!44 = !DILocation(line: 19, scope: !8) |
