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08fbde827c
The debug-use flag must be set exactly for uses on DBG_VALUEs. This is so obvious that it can be trivially inferred while parsing. This will reduce noise when printing while omitting an information that has little value to the user. The parser will keep recognizing the flag for compatibility with old `.mir` files. Differential Revision: https://reviews.llvm.org/D53903 llvm-svn: 345671
52 lines
1.9 KiB
YAML
52 lines
1.9 KiB
YAML
# RUN: llc -O0 -mtriple x86_64-pc-linux-gnu -run-pass simple-register-coalescing -verify-coalescing -o - %s | FileCheck %s
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--- |
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define i16 @main() {
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entry:
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call void @llvm.dbg.value(metadata i8 0, metadata !11, metadata !DIExpression()), !dbg !13
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ret i16 0
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}
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; Function Attrs: nounwind readnone speculatable
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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_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "tmp.c", directory: "")
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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, !"wchar_size", i32 1}
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!6 = !{!"clang"}
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!7 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 4, type: !8, isLocal: false, isDefinition: true, scopeLine: 4, isOptimized: false, unit: !0, retainedNodes: !2)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10}
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!10 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_signed)
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!11 = !DILocalVariable(name: "c", scope: !7, file: !1, line: 5, type: !12)
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!12 = !DIBasicType(name: "mytype", size: 16)
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!13 = !DILocation(line: 5, column: 11, scope: !7)
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...
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---
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name: main
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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%0:gr16_abcd = MOV16ri 0
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DBG_VALUE %0.sub_8bit:gr16_abcd, $noreg, !11, !DIExpression(), debug-location !13
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undef %6.sub_8bit:gr16_abcd = COPY killed %0.sub_8bit
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dead $dx = COPY killed %6
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...
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# Verify that we get $dl in the DBG_VALUE (and not $dx.sub_8bit as we used to
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# do before the bugfix, which resulted in "Bad machine code: Illegal
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# subregister index for physical register").
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#
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# CHECK: bb.0.entry:
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# CHECK-NEXT: $dx = MOV16ri 0
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# CHECK-NEXT: DBG_VALUE $dl,
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