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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
59 lines
2.4 KiB
LLVM
59 lines
2.4 KiB
LLVM
; Test dwarf codegen of DW_OP_minus.
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; RUN: llc -filetype=obj < %s | llvm-dwarfdump - | FileCheck %s
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; RUN: llc -dwarf-version=2 -filetype=obj < %s | llvm-dwarfdump - \
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; RUN: | FileCheck %s --check-prefix=DWARF2
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; RUN: llc -dwarf-version=3 -filetype=obj < %s | llvm-dwarfdump - \
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; RUN: | FileCheck %s --check-prefix=DWARF2
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; This was derived manually from:
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; int inc(int i) {
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; return i+1;
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; }
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; DWARF2: .debug_info
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; DWARF2: DW_TAG_formal_parameter
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; DWARF2-NEXT: DW_AT_name {{.*}}"i"
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; DWARF2-NOT: DW_AT_location
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; CHECK: .debug_loc contents:
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; CHECK: 0x00000000:
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; CHECK-NEXT: 0x0000000000000000 - 0x0000000000000004: DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_constu 0x1, DW_OP_minus, DW_OP_stack_value
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; rax+0, constu 0xffffffff, and, constu 0x00000001, minus, stack-value
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source_filename = "minus.c"
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.12.0"
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define i32 @inc(i32 %i) local_unnamed_addr #1 !dbg !7 {
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entry:
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%add = add nsw i32 %i, 1, !dbg !15
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tail call void @llvm.dbg.value(metadata i32 %add, metadata !12, metadata !13), !dbg !14
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ret i32 %add, !dbg !16
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}
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 4.0.0 (trunk 286322) (llvm/trunk 286305)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "minus.c", directory: "/tmp")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"PIC Level", i32 2}
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!6 = !{!"clang version 4.0.0 (trunk 286322) (llvm/trunk 286305)"}
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!7 = distinct !DISubprogram(name: "inc", scope: !1, file: !1, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !11)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10, !10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !{!12}
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!12 = !DILocalVariable(name: "i", arg: 1, scope: !7, file: !1, line: 1, type: !10)
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!13 = !DIExpression(DW_OP_constu, 1, DW_OP_minus, DW_OP_stack_value)
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!14 = !DILocation(line: 1, column: 13, scope: !7)
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!15 = !DILocation(line: 2, column: 11, scope: !7)
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!16 = !DILocation(line: 2, column: 3, scope: !7)
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