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96e8543691
Summary: Based on Fred's patch here: https://reviews.llvm.org/D6771 I can't seem to commandeer the old review, so I'm creating a new one. With that change the locations exrpessions are pretty printed inline in the DIE tree. The output looks like this for debug_loc entries: DW_AT_location [DW_FORM_data4] (0x00000000 0x0000000000000001 - 0x000000000000000b: DW_OP_consts +3 0x000000000000000b - 0x0000000000000012: DW_OP_consts +7 0x0000000000000012 - 0x000000000000001b: DW_OP_reg0 RAX, DW_OP_piece 0x4 0x000000000000001b - 0x0000000000000024: DW_OP_breg5 RDI+0) And like this for debug_loc.dwo entries: DW_AT_location [DW_FORM_sec_offset] (0x00000000 Addr idx 2 (w/ length 190): DW_OP_consts +0, DW_OP_stack_value Addr idx 3 (w/ length 23): DW_OP_reg0 RAX, DW_OP_piece 0x4) Simple locations without ranges are printed inline: DW_AT_location [DW_FORM_block1] (DW_OP_reg4 RSI, DW_OP_piece 0x4, DW_OP_bit_piece 0x20 0x0) The debug_loc(.dwo) dumping in changed accordingly to factor the code. Reviewers: dblaikie, aprantl, friss Subscribers: mgorny, javed.absar, hiraditya, llvm-commits, JDevlieghere Differential Revision: https://reviews.llvm.org/D37123 llvm-svn: 312042
64 lines
2.4 KiB
LLVM
64 lines
2.4 KiB
LLVM
; RUN: llc -filetype=obj %s -o - | llvm-dwarfdump - | FileCheck %s
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;
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; Generated at -Os from:
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; void *foo(void *dst);
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; void start() {
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; unsigned size;
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; foo(&size);
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; if (size != 0) { // Work around a bug to preserve the dbg.value.
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; }
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; }
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; ModuleID = 'test1.cpp'
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target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
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target triple = "arm64-apple-ios"
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; Function Attrs: nounwind optsize
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define void @_Z5startv() #0 !dbg !4 {
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entry:
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%size = alloca i32, align 4
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%0 = bitcast i32* %size to i8*, !dbg !15
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%call = call i8* @_Z3fooPv(i8* %0) #3, !dbg !15
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call void @llvm.dbg.value(metadata i32* %size, metadata !10, metadata !16), !dbg !17
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; CHECK: .debug_info contents:
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; CHECK: DW_TAG_variable
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; CHECK-NEXT: DW_AT_location
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; CHECK-NEXT: DW_OP_breg31 WSP+12, DW_OP_deref
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; CHECK-NEXT: DW_AT_name {{.*}}"size"
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ret void, !dbg !18
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}
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; Function Attrs: optsize
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declare i8* @_Z3fooPv(i8*) #1
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, metadata, metadata) #2
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attributes #0 = { nounwind optsize }
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attributes #1 = { optsize }
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attributes #2 = { nounwind readnone }
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attributes #3 = { nounwind optsize }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!12, !13}
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!llvm.ident = !{!14}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.6.0 (trunk 223149) (llvm/trunk 223115)", isOptimized: true, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
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!1 = !DIFile(filename: "<stdin>", directory: "")
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!2 = !{}
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!4 = distinct !DISubprogram(name: "start", linkageName: "_Z5startv", line: 2, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 3, file: !5, scope: !6, type: !7, variables: !9)
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!5 = !DIFile(filename: "test1.c", directory: "")
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!6 = !DIFile(filename: "test1.c", directory: "")
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!7 = !DISubroutineType(types: !8)
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!8 = !{null}
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!9 = !{!10}
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!10 = !DILocalVariable(name: "size", line: 4, scope: !4, file: !6, type: !11)
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!11 = !DIBasicType(tag: DW_TAG_base_type, name: "unsigned int", size: 32, align: 32, encoding: DW_ATE_unsigned)
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!12 = !{i32 2, !"Dwarf Version", i32 2}
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!13 = !{i32 2, !"Debug Info Version", i32 3}
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!14 = !{!"clang version 3.6.0 (trunk 223149) (llvm/trunk 223115)"}
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!15 = !DILocation(line: 5, column: 3, scope: !4)
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!16 = !DIExpression(DW_OP_deref)
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!17 = !DILocation(line: 4, column: 12, scope: !4)
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!18 = !DILocation(line: 8, column: 1, scope: !4)
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