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 !dbg !4 { 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 = distinct !DICompileUnit(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 = !DIFile(filename: "test.cpp", directory: "/home/kromanova/ngh/ToT_latest/llvm/test/DebugInfo") 58!2 = !{} 59!3 = !{!4} 60!4 = distinct !DISubprogram(name: "main", line: 3, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 4, file: !1, scope: !5, type: !6, variables: !9) 61!5 = !DIFile(filename: "test.cpp", directory: "/home/kromanova/ngh/ToT_latest/llvm/test/DebugInfo") 62!6 = !DISubroutineType(types: !7) 63!7 = !{!8} 64!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 65!9 = !{!10} 66!10 = !DILocalVariable(name: "c", line: 5, scope: !4, file: !5, type: !11) 67!11 = !DIDerivedType(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 = !DIExpression() 73!17 = !DILocation(line: 5, column: 16, scope: !4) 74!18 = !DILocation(line: 5, column: 3, scope: !4) 75!19 = !DILocation(line: 6, column: 7, scope: !4) 76!20 = !DILocation(line: 7, column: 3, scope: !4) 77 78