1; xfail this test on hexagon because at O2, instructions are bundled in packets
2; and DW_OP_lit13 is correctly omitted.
3; XFAIL: hexagon
4
5; RUN: %llc_dwarf -O2  -dwarf-version 2 -filetype=obj < %s | llvm-dwarfdump - | FileCheck %s  --check-prefix=DWARF23
6; RUN: %llc_dwarf -O2  -dwarf-version 3 -filetype=obj < %s | llvm-dwarfdump - | FileCheck %s  --check-prefix=DWARF23
7; RUN: %llc_dwarf -O2  -dwarf-version 4 -filetype=obj < %s | llvm-dwarfdump - | FileCheck %s  --check-prefix=DWARF4
8
9; This is a test for PR21176.
10; DW_OP_const <const> doesn't describe a constant value, but a value at a constant address.
11; The proper way to describe a constant value is DW_OP_constu <const>, DW_OP_stack_value.
12; For values < 32 we emit the canonical DW_OP_lit<const>.
13
14; Generated with clang -S -emit-llvm -g -O2 test.cpp
15
16; extern int func();
17;
18; int main()
19; {
20;   volatile int c = 13;
21;   c = func();
22;   return c;
23; }
24
25; CHECK: DW_TAG_variable
26; CHECK: DW_AT_location
27; CHECK-NOT: DW_AT
28; DWARF23: DW_OP_lit13{{$}}
29; DWARF4: DW_OP_lit13, DW_OP_stack_value{{$}}
30
31; Function Attrs: uwtable
32define i32 @main() #0 !dbg !4 {
33entry:
34  %c = alloca i32, align 4
35  tail call void @llvm.dbg.value(metadata i32 13, metadata !10, metadata !16), !dbg !17
36  store volatile i32 13, i32* %c, align 4, !dbg !18
37  %call = tail call i32 @_Z4funcv(), !dbg !19
38  tail call void @llvm.dbg.value(metadata i32 %call, metadata !10, metadata !16), !dbg !17
39  store volatile i32 %call, i32* %c, align 4, !dbg !19
40  tail call void @llvm.dbg.value(metadata i32* %c, metadata !10, metadata !21), !dbg !17
41  %c.0.c.0. = load volatile i32, i32* %c, align 4, !dbg !20
42  ret i32 %c.0.c.0., !dbg !20
43}
44
45declare i32 @_Z4funcv() #1
46
47; Function Attrs: nounwind readnone
48declare void @llvm.dbg.value(metadata, metadata, metadata) #2
49
50attributes #0 = { uwtable "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
51attributes #1 = { "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
52attributes #2 = { nounwind readnone }
53
54!llvm.dbg.cu = !{!0}
55!llvm.module.flags = !{!12, !13}
56!llvm.ident = !{!14}
57
58!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)
59!1 = !DIFile(filename: "test.cpp", directory: "/home/kromanova/ngh/ToT_latest/llvm/test/DebugInfo")
60!2 = !{}
61!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)
62!5 = !DIFile(filename: "test.cpp", directory: "/home/kromanova/ngh/ToT_latest/llvm/test/DebugInfo")
63!6 = !DISubroutineType(types: !7)
64!7 = !{!8}
65!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
66!9 = !{!10}
67!10 = !DILocalVariable(name: "c", line: 5, scope: !4, file: !5, type: !11)
68!11 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !8)
69!12 = !{i32 2, !"Dwarf Version", i32 2}
70!13 = !{i32 2, !"Debug Info Version", i32 3}
71!14 = !{!"clang version 3.6.0 (trunk 223522)"}
72!15 = !{i32 13}
73!16 = !DIExpression()
74!17 = !DILocation(line: 5, column: 16, scope: !4)
75!18 = !DILocation(line: 5, column: 3, scope: !4)
76!19 = !DILocation(line: 6, column: 7, scope: !4)
77!20 = !DILocation(line: 7, column: 3, scope: !4)
78!21 = !DIExpression(DW_OP_deref)
79
80