a84e1e6c0d
Originally encountered with RUST, but also there are cases with distributed LTO where debug info dwo units contain structurally the same debug information, with difference in DW_AT_linkage_name. This causes collision on DWO ID. Differential Revision: https://reviews.llvm.org/D129317
48 lines
2.4 KiB
LLVM
48 lines
2.4 KiB
LLVM
; RUN: llc -split-dwarf-file=foo.dwo -O0 < %s -mtriple=x86_64-unknown-linux-gnu -filetype=obj -o - \
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; RUN: | llvm-dwarfdump - | FileCheck --check-prefix=H1 %s
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; RUN: llc -split-dwarf-file=foo.dwo -O0 < %p/../Inputs/fission-hash-local2.ll -mtriple=x86_64-unknown-linux-gnu -filetype=obj -o - \
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; RUN: | llvm-dwarfdump - | FileCheck --check-prefix=H2 %s
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; Testing that the location of a local variable in a global function is hashed
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; fission-hash-local2.ll is identical except for the value of the local
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; variable (local.ll uses the constant 7 in the llvm.dbg.value below, local2.ll
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; uses the constant 9) so it should have a different dwo_id, seen below.
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; Original source:
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; void f1() {
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; int i = 7; // or 9
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; }
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; H1: DW_AT_GNU_dwo_id (0xc1220cf66b1190ad)
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; H2: DW_AT_GNU_dwo_id (0xf66067a0cf366f0e)
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; Function Attrs: norecurse nounwind readnone uwtable
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define dso_local void @_Z2f1v() local_unnamed_addr !dbg !7 {
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entry:
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call void @llvm.dbg.value(metadata i32 7, metadata !11, metadata !DIExpression()), !dbg !13
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ret void, !dbg !14
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}
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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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_C_plus_plus_14, file: !1, producer: "clang version 11.0.0 (git@github.com:llvm/llvm-project.git edc3f4f02e54c2ae1067f60f6a0ed6caf5b92ef6)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "hash.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch")
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!2 = !{}
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!3 = !{i32 7, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"clang version 11.0.0 (git@github.com:llvm/llvm-project.git edc3f4f02e54c2ae1067f60f6a0ed6caf5b92ef6)"}
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!7 = distinct !DISubprogram(name: "f1", linkageName: "_Z2f1v", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !10)
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!8 = !DISubroutineType(types: !9)
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!9 = !{null}
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!10 = !{!11}
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!11 = !DILocalVariable(name: "i", scope: !7, file: !1, line: 2, type: !12)
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!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!13 = !DILocation(line: 0, scope: !7)
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!14 = !DILocation(line: 3, column: 1, scope: !7)
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