1 ; REQUIRES: object-emission
3 ; RUN: %llc_dwarf -O2 -dwarf-version 2 -filetype=obj < %s | llvm-dwarfdump - | FileCheck %s --check-prefix=DWARF23
4 ; RUN: %llc_dwarf -O2 -dwarf-version 3 -filetype=obj < %s | llvm-dwarfdump - | FileCheck %s --check-prefix=DWARF23
5 ; RUN: %llc_dwarf -O2 -dwarf-version 4 -filetype=obj < %s | llvm-dwarfdump - | FileCheck %s --check-prefix=DWARF4
7 ; This is a test for PR21176.
8 ; DW_OP_const <const> doesn't describe a constant value, but a value at a constant address.
9 ; The proper way to describe a constant value is DW_OP_constu <const>, DW_OP_stack_value.
10 ; For values < 32 we emit the canonical DW_OP_lit<const>.
12 ; Generated with clang -S -emit-llvm -g -O2 test.cpp
18 ; volatile int c = 13;
23 ; CHECK: DW_TAG_variable
24 ; CHECK: DW_AT_location
26 ; DWARF23: DW_OP_lit13{{$}}
27 ; DWARF4: DW_OP_lit13, DW_OP_stack_value{{$}}
29 ; Function Attrs: uwtable
30 define i32 @main() #0 !dbg !4 {
32 %c = alloca i32, align 4
33 tail call void @llvm.dbg.value(metadata i32 13, metadata !10, metadata !16), !dbg !17
34 store volatile i32 13, i32* %c, align 4, !dbg !18
35 %call = tail call i32 @_Z4funcv(), !dbg !19
36 tail call void @llvm.dbg.value(metadata i32 %call, metadata !10, metadata !16), !dbg !17
37 store volatile i32 %call, i32* %c, align 4, !dbg !19
38 tail call void @llvm.dbg.value(metadata i32* %c, metadata !10, metadata !21), !dbg !17
39 %c.0.c.0. = load volatile i32, i32* %c, align 4, !dbg !20
40 ret i32 %c.0.c.0., !dbg !20
43 declare i32 @_Z4funcv() #1
45 ; Function Attrs: nounwind readnone
46 declare void @llvm.dbg.value(metadata, metadata, metadata) #2
48 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" }
49 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" }
50 attributes #2 = { nounwind readnone }
53 !llvm.module.flags = !{!12, !13}
56 !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)
57 !1 = !DIFile(filename: "test.cpp", directory: "/home/kromanova/ngh/ToT_latest/llvm/test/DebugInfo")
59 !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)
60 !5 = !DIFile(filename: "test.cpp", directory: "/home/kromanova/ngh/ToT_latest/llvm/test/DebugInfo")
61 !6 = !DISubroutineType(types: !7)
63 !8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
65 !10 = !DILocalVariable(name: "c", line: 5, scope: !4, file: !5, type: !11)
66 !11 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !8)
67 !12 = !{i32 2, !"Dwarf Version", i32 2}
68 !13 = !{i32 2, !"Debug Info Version", i32 3}
69 !14 = !{!"clang version 3.6.0 (trunk 223522)"}
72 !17 = !DILocation(line: 5, column: 16, scope: !4)
73 !18 = !DILocation(line: 5, column: 3, scope: !4)
74 !19 = !DILocation(line: 6, column: 7, scope: !4)
75 !20 = !DILocation(line: 7, column: 3, scope: !4)
76 !21 = !DIExpression(DW_OP_deref)