61 lines
2.7 KiB
LLVM
61 lines
2.7 KiB
LLVM
; RUN: llc -mtriple=x86_64-pc-linux -x86-cmov-converter=true -verify-machineinstrs < %s | FileCheck %s
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; Test for PR34565, check that DBG instructions are ignored while optimizing
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; X86 CMOV instructions.
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; In this case, we check that there is no 'cmov' generated.
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; CHECK-NOT: cmov
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@main.buf = private unnamed_addr constant [10 x i64] [i64 0, i64 1, i64 2, i64 3, i64 4, i64 5, i64 6, i64 7, i64 8, i64 9], align 8
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define i32 @main() #0 !dbg !5 {
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entry:
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br label %while.body
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while.body: ; preds = %while.body, %entry
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%a.010 = phi i32 [ 0, %entry ], [ %add.a.0, %while.body ]
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%b.09 = phi i32 [ 10, %entry ], [ %b.0.add, %while.body ]
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%add = add i32 %a.010, %b.09
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%call = tail call i32 @rand()
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%conv = sext i32 %call to i64
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%arrayidx = getelementptr inbounds [10 x i64], [10 x i64]* @main.buf, i32 0, i32 %add
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%0 = load i64, i64* %arrayidx, align 8
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%cmp1 = icmp ult i64 %0, %conv
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%b.0.add = select i1 %cmp1, i32 %b.09, i32 %add
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%add.a.0 = select i1 %cmp1, i32 %add, i32 %a.010
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tail call void @llvm.dbg.value(metadata i32 %add.a.0, metadata !10, metadata !DIExpression()), !dbg !13
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tail call void @llvm.dbg.value(metadata i32 %b.0.add, metadata !12, metadata !DIExpression()), !dbg !14
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tail call void @llvm.dbg.value(metadata i32 %add.a.0, metadata !10, metadata !DIExpression()), !dbg !13
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tail call void @llvm.dbg.value(metadata i32 %b.0.add, metadata !12, metadata !DIExpression()), !dbg !14
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%cmp = icmp ult i32 %add.a.0, %b.0.add
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br i1 %cmp, label %while.body, label %while.end
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while.end: ; preds = %while.body
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ret i32 0
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}
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declare i32 @rand()
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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attributes #0 = { "target-cpu"="x86-64" }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 (trunk)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "PR34565.c", directory: "\5C")
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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 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 3, type: !6, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !9)
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!6 = !DISubroutineType(types: !7)
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!7 = !{!8}
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!8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!9 = !{!10, !12}
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!10 = !DILocalVariable(name: "a", scope: !5, file: !1, line: 6, type: !11)
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!11 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
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!12 = !DILocalVariable(name: "b", scope: !5, file: !1, line: 7, type: !11)
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!13 = !DILocation(line: 6, column: 16, scope: !5)
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!14 = !DILocation(line: 7, column: 16, scope: !5)
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