1; REQUIRES: object-emission
2; This test is failing for powerpc64, because a location list for the
3; variable 'c' is not generated at all. Temporary marking this test as XFAIL
4; for powerpc, until PR21881 is fixed.
5; XFAIL: powerpc64
6
7; RUN: %llc_dwarf -O2  -dwarf-version 2 -filetype=obj < %s | llvm-dwarfdump - | FileCheck %s  --check-prefix=DWARF23
8; RUN: %llc_dwarf -O2  -dwarf-version 3 -filetype=obj < %s | llvm-dwarfdump - | FileCheck %s  --check-prefix=DWARF23
9; RUN: %llc_dwarf -O2  -dwarf-version 4 -filetype=obj < %s | llvm-dwarfdump - | FileCheck %s  --check-prefix=DWARF4
10
11; This is a test for PR21176.
12; DW_OP_const <const> doesn't describe a constant value, but a value at a constant address.
13; The proper way to describe a constant value is DW_OP_constu <const>, DW_OP_stack_value.
14
15; Generated with clang -S -emit-llvm -g -O2 test.cpp
16
17; extern int func();
18;
19; int main()
20; {
21;   volatile int c = 13;
22;   c = func();
23;   return c;
24; }
25
26; DWARF23: Location description: 10 0d {{$}}
27; DWARF4: Location description: 10 0d 9f
28
29; Function Attrs: uwtable
30define i32 @main() #0 {
31entry:
32  %c = alloca i32, align 4
33  tail call void @llvm.dbg.value(metadata i32 13, i64 0, 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, i64 0, 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, i64 0, metadata !10, metadata !16), !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
41}
42
43declare i32 @_Z4funcv() #1
44
45; Function Attrs: nounwind readnone
46declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
47
48attributes #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" }
49attributes #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" }
50attributes #2 = { nounwind readnone }
51
52!llvm.dbg.cu = !{!0}
53!llvm.module.flags = !{!12, !13}
54!llvm.ident = !{!14}
55
56!0 = !MDCompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.6.0 (trunk 223522)", isOptimized: true, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
57!1 = !MDFile(filename: "test.cpp", directory: "/home/kromanova/ngh/ToT_latest/llvm/test/DebugInfo")
58!2 = !{}
59!3 = !{!4}
60!4 = !MDSubprogram(name: "main", line: 3, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 4, file: !1, scope: !5, type: !6, function: i32 ()* @main, variables: !9)
61!5 = !MDFile(filename: "test.cpp", directory: "/home/kromanova/ngh/ToT_latest/llvm/test/DebugInfo")
62!6 = !MDSubroutineType(types: !7)
63!7 = !{!8}
64!8 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
65!9 = !{!10}
66!10 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "c", line: 5, scope: !4, file: !5, type: !11)
67!11 = !MDDerivedType(tag: DW_TAG_volatile_type, baseType: !8)
68!12 = !{i32 2, !"Dwarf Version", i32 2}
69!13 = !{i32 2, !"Debug Info Version", i32 3}
70!14 = !{!"clang version 3.6.0 (trunk 223522)"}
71!15 = !{i32 13}
72!16 = !MDExpression()
73!17 = !MDLocation(line: 5, column: 16, scope: !4)
74!18 = !MDLocation(line: 5, column: 3, scope: !4)
75!19 = !MDLocation(line: 6, column: 7, scope: !4)
76!20 = !MDLocation(line: 7, column: 3, scope: !4)
77
78