forked from OSchip/llvm-project
78 lines
3.5 KiB
LLVM
78 lines
3.5 KiB
LLVM
; REQUIRES: object-emission
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; RUN: %llc_dwarf -O2 -dwarf-version 2 -filetype=obj < %s | llvm-dwarfdump - | FileCheck %s --check-prefix=DWARF23
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; RUN: %llc_dwarf -O2 -dwarf-version 3 -filetype=obj < %s | llvm-dwarfdump - | FileCheck %s --check-prefix=DWARF23
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; RUN: %llc_dwarf -O2 -dwarf-version 4 -filetype=obj < %s | llvm-dwarfdump - | FileCheck %s --check-prefix=DWARF4
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; This is a test for PR21176.
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; DW_OP_const <const> doesn't describe a constant value, but a value at a constant address.
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; The proper way to describe a constant value is DW_OP_constu <const>, DW_OP_stack_value.
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; For values < 32 we emit the canonical DW_OP_lit<const>.
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; Generated with clang -S -emit-llvm -g -O2 test.cpp
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; extern int func();
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;
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; int main()
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; {
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; volatile int c = 13;
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; c = func();
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; return c;
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; }
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; CHECK: DW_TAG_variable
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; CHECK: DW_AT_location
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; CHECK-NOT: DW_AT
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; DWARF23: DW_OP_lit13{{$}}
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; DWARF4: DW_OP_lit13, DW_OP_stack_value{{$}}
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; Function Attrs: uwtable
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define i32 @main() #0 !dbg !4 {
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entry:
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%c = alloca i32, align 4
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tail call void @llvm.dbg.value(metadata i32 13, metadata !10, metadata !16), !dbg !17
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store volatile i32 13, i32* %c, align 4, !dbg !18
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%call = tail call i32 @_Z4funcv(), !dbg !19
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tail call void @llvm.dbg.value(metadata i32 %call, metadata !10, metadata !16), !dbg !17
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store volatile i32 %call, i32* %c, align 4, !dbg !19
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tail call void @llvm.dbg.value(metadata i32* %c, metadata !10, metadata !21), !dbg !17
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%c.0.c.0. = load volatile i32, i32* %c, align 4, !dbg !20
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ret i32 %c.0.c.0., !dbg !20
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}
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declare i32 @_Z4funcv() #1
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, metadata, metadata) #2
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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" }
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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" }
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attributes #2 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!12, !13}
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!llvm.ident = !{!14}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.6.0 (trunk 223522)", isOptimized: true, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
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!1 = !DIFile(filename: "test.cpp", directory: "/home/kromanova/ngh/ToT_latest/llvm/test/DebugInfo")
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!2 = !{}
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!4 = distinct !DISubprogram(name: "main", line: 3, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 4, file: !1, scope: !5, type: !6, retainedNodes: !9)
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!5 = !DIFile(filename: "test.cpp", directory: "/home/kromanova/ngh/ToT_latest/llvm/test/DebugInfo")
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!6 = !DISubroutineType(types: !7)
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!7 = !{!8}
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!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!9 = !{!10}
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!10 = !DILocalVariable(name: "c", line: 5, scope: !4, file: !5, type: !11)
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!11 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !8)
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!12 = !{i32 2, !"Dwarf Version", i32 2}
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!13 = !{i32 2, !"Debug Info Version", i32 3}
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!14 = !{!"clang version 3.6.0 (trunk 223522)"}
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!15 = !{i32 13}
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!16 = !DIExpression()
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!17 = !DILocation(line: 5, column: 16, scope: !4)
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!18 = !DILocation(line: 5, column: 3, scope: !4)
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!19 = !DILocation(line: 6, column: 7, scope: !4)
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!20 = !DILocation(line: 7, column: 3, scope: !4)
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!21 = !DIExpression(DW_OP_deref)
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