57 lines
2.2 KiB
LLVM
57 lines
2.2 KiB
LLVM
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; RUN: llc -mtriple=x86_64-unknown-unknown -start-after=codegenprepare -stop-before finalize-isel %s -o - | FileCheck %s
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; Test that the dbg.value for %baz, which doesn't exist in the 'next' bb,
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; can be salvaged back to the underlying argument vreg.
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; CHECK: ![[AAAVAR:.*]] = !DILocalVariable(name: "aaa",
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; CHECK-LABEL: bb.1.next:
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; CHECK: DBG_VALUE %{{[0-9]+}}, $noreg, ![[AAAVAR]]
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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-linux-gnu"
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define i8 @f(i32* %foo) local_unnamed_addr !dbg !6 {
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entry:
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%bar = getelementptr i32, i32* %foo, i32 4
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%baz = bitcast i32* %bar to i8*
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%quux = load i8, i8* %baz
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br label %next
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next: ; preds = %entry
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tail call void @llvm.dbg.value(metadata i8* %baz, metadata !15, metadata !DIExpression()), !dbg !30
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%xyzzy = add i8 %quux, 123
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br label %fin
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fin: ; preds = %next
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%trains = getelementptr i32, i32* %foo, i32 3
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%planes = bitcast i32* %trains to i8*
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%cars = load i8, i8* %planes
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%ret = add i8 %xyzzy, %cars
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ret i8 %ret
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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) #0
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attributes #0 = { nounwind readnone speculatable }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!25, !26, !27, !28}
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!llvm.ident = !{!29}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "test.c", directory: ".")
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!2 = !{}
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!6 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 18, type: !7, scopeLine: 19, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !14)
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!7 = !DISubroutineType(types: !8)
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!8 = !{!13}
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!13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_unsigned)
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!14 = !{!15}
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!15 = !DILocalVariable(name: "aaa", scope: !6, file: !1, line: 18, type: !13)
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!25 = !{i32 2, !"Dwarf Version", i32 4}
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!26 = !{i32 2, !"Debug Info Version", i32 3}
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!27 = !{i32 1, !"wchar_size", i32 4}
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!28 = !{i32 7, !"PIC Level", i32 2}
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!29 = !{!"clang"}
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!30 = !DILocation(line: 18, column: 14, scope: !6)
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