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* %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 = !{!"0x11\004\00clang version 3.6.0 (trunk 223522)\001\00\000\00\001", !1, !2, !2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [/home/kromanova/ngh/ToT_latest/llvm/test/DebugInfo/test.cpp] [DW_LANG_C_plus_plus] 57!1 = !{!"test.cpp", !"/home/kromanova/ngh/ToT_latest/llvm/test/DebugInfo"} 58!2 = !{} 59!3 = !{!4} 60!4 = !{!"0x2e\00main\00main\00\003\000\001\000\000\00256\001\004", !1, !5, !6, null, i32 ()* @main, null, null, !9} ; [ DW_TAG_subprogram ] [line 3] [def] [scope 4] [main] 61!5 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [/home/kromanova/ngh/ToT_latest/llvm/test/DebugInfo/test.cpp] 62!6 = !{!"0x15\00\000\000\000\000\000\000", null, null, null, !7, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ] 63!7 = !{!8} 64!8 = !{!"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed] 65!9 = !{!10} 66!10 = !{!"0x100\00c\005\000", !4, !5, !11} ; [ DW_TAG_auto_variable ] [c] [line 5] 67!11 = !{!"0x35\00\000\000\000\000\000", null, null, !8} ; [ DW_TAG_volatile_type ] [line 0, size 0, align 0, offset 0] [from int] 68!12 = !{i32 2, !"Dwarf Version", i32 2} 69!13 = !{i32 2, !"Debug Info Version", i32 2} 70!14 = !{!"clang version 3.6.0 (trunk 223522)"} 71!15 = !{i32 13} 72!16 = !{!"0x102"} ; [ DW_TAG_expression ] 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