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
82 lines
5.3 KiB
LLVM
82 lines
5.3 KiB
LLVM
; RUN: llc -mtriple=x86_64 -filetype=obj < %s \
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; RUN: | llvm-dwarfdump -debug-info -debug-loclists - | FileCheck %s
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; RUN: llc -mtriple=x86_64 -split-dwarf-file=foo.dwo -filetype=obj -dwarf-op-convert=Enable < %s \
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; RUN: | llvm-dwarfdump -debug-info -debug-loclists - | FileCheck --check-prefix=SPLIT --check-prefix=CHECK %s
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; RUN: llc -mtriple=x86_64 -split-dwarf-file=foo.dwo -filetype=asm -dwarf-op-convert=Enable < %s \
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; RUN: | FileCheck --check-prefix=ASM %s
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; A bit of a brittle test - this is testing the specific DWO_id. The
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; alternative would be to test two files with different DW_OP_convert values &
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; ensuring the DWO IDs differ when the DW_OP_convert parameter differs.
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; So if this test ends up being a brittle pain to maintain, updating the DWO ID
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; often - add another IR file with a different DW_OP_convert that's otherwise
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; identical and demonstrate that they have different DWO IDs.
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; SPLIT: 0x00000000: Compile Unit: {{.*}} DWO_id = 0x4dbee91db55385db
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; Regression testing a fairly quirky bug where instead of hashing (see above),
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; extra bytes would be emitted into the output assembly in no
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; particular/intentional section - so let's check they don't show up at all:
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; ASM-NOT: .asciz "\200\200\200"
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; ASM: .byte 10 # Loc expr size
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; ASM-NEXT: .byte 17 # DW_OP_consts
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; ASM-NEXT: .byte 7 # 7
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; ASM-NEXT: .byte 48 # DW_OP_lit0
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; ASM-NEXT: .byte 34 # DW_OP_plus
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; ASM-NEXT: .byte 168 # DW_OP_convert
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; ASM-NEXT: .asciz "\232\200\200" #
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; ASM-NEXT: .byte 159 # DW_OP_stack_value
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; ASM-NEXT: .byte 0 # DW_LLE_end_of_list
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; ASM-NOT: .asciz "\200\200\200"
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; CHECK: 0x{{0*}}[[TYPE:.*]]: DW_TAG_base_type
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; CHECK-NEXT: DW_AT_name ("DW_ATE_unsigned_32")
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; CHECK: DW_LLE_offset_pair ({{.*}}): DW_OP_consts +7, DW_OP_lit0, DW_OP_plus, DW_OP_convert 0x[[TYPE]], DW_OP_stack_value
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; Function Attrs: uwtable
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define dso_local void @_Z2f2v() local_unnamed_addr #0 !dbg !11 {
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entry:
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tail call void @_Z2f1v(), !dbg !15
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;; This test depends on "convert" surviving all the way to the final object.
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;; So, insert something before DW_OP_LLVM_convert that the expression folder
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;; will not attempt to eliminate. At the moment, only "convert" ops are folded.
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;; If you have to change the expression, the expected DWO_id also changes.
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call void @llvm.dbg.value(metadata i32 7, metadata !13, metadata !DIExpression(DW_OP_lit0, DW_OP_plus, DW_OP_LLVM_convert, 32, DW_ATE_unsigned, DW_OP_stack_value)), !dbg !16
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tail call void @_Z2f1v(), !dbg !17
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ret void, !dbg !18
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}
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declare !dbg !4 dso_local void @_Z2f1v() local_unnamed_addr #1
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata) #2
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attributes #0 = { uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="none" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="none" "less-precise-fpmad"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #2 = { nounwind readnone speculatable willreturn }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!7, !8, !9}
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!llvm.ident = !{!10}
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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: "loc.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch")
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!2 = !{}
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!4 = !DISubprogram(name: "f1", linkageName: "_Z2f1v", scope: !1, file: !1, line: 1, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
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!5 = !DISubroutineType(types: !6)
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!6 = !{null}
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!7 = !{i32 7, !"Dwarf Version", i32 5}
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!8 = !{i32 2, !"Debug Info Version", i32 3}
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!9 = !{i32 1, !"wchar_size", i32 4}
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!10 = !{!"clang version 11.0.0 (git@github.com:llvm/llvm-project.git edc3f4f02e54c2ae1067f60f6a0ed6caf5b92ef6)"}
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!11 = distinct !DISubprogram(name: "f2", linkageName: "_Z2f2v", scope: !1, file: !1, line: 2, type: !5, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !12)
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!12 = !{!13}
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!13 = !DILocalVariable(name: "x", scope: !11, file: !1, line: 3, type: !14)
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!14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!15 = !DILocation(line: 4, column: 3, scope: !11)
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!16 = !DILocation(line: 0, scope: !11)
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!17 = !DILocation(line: 6, column: 3, scope: !11)
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!18 = !DILocation(line: 7, column: 1, scope: !11)
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