63 lines
2.4 KiB
LLVM
63 lines
2.4 KiB
LLVM
; RUN: llc -mtriple=x86_64-unknown-unknown -mcpu=x86-64 -mattr=sse -enable-unsafe-fp-math < %s | FileCheck %s
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; The debug info in this test case was causing a crash because machine trace metrics
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; did not correctly ignore debug instructions. The check lines ensure that the
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; machine-combiner pass has run, reassociated the add operands, and therefore
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; used machine trace metrics.
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define void @PR24199() {
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; CHECK-LABEL: PR24199:
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; CHECK: addss %xmm1, %xmm0
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; CHECK: addss %xmm2, %xmm0
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entry:
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%i = alloca %struct.A, align 8
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%tobool = icmp ne i32 undef, 0
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br i1 undef, label %if.end, label %if.then
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if.then:
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br label %if.end
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if.end:
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%h = phi float [ 0.0, %if.then ], [ 4.0, %entry ]
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call void @foo(%struct.A* nonnull undef)
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tail call void @llvm.dbg.value(metadata %struct.A* undef, i64 0, metadata !5, metadata !4), !dbg !6
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tail call void @llvm.dbg.value(metadata float %h, i64 0, metadata !5, metadata !4), !dbg !6
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%n0 = load float, float* undef, align 4
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%mul = fmul fast float %n0, %h
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%add = fadd fast float %mul, 1.0
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tail call void @llvm.dbg.value(metadata %struct.A* undef, i64 0, metadata !5, metadata !4), !dbg !6
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tail call void @llvm.dbg.value(metadata float %add, i64 0, metadata !5, metadata !4), !dbg !6
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%add.i = fadd fast float %add, %n0
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store float %add.i, float* undef, align 4
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%n1 = bitcast %struct.A* %i to i8*
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call void @llvm.lifetime.start.p0i8(i64 16, i8* %n1)
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%n2 = load <2 x float>, <2 x float>* undef, align 8
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%conv = uitofp i1 %tobool to float
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%bitcast = extractelement <2 x float> %n2, i32 0
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%factor = fmul fast float %bitcast, 2.0
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%add3 = fadd fast float %factor, %conv
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call void @bar(float %add3)
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ret void
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}
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%struct.A = type { float, float }
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declare void @bar(float)
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declare void @foo(%struct.A*)
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declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture)
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
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!1 = !DIFile(filename: "24199.cpp", directory: "/bin")
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!2 = !{i32 2, !"Debug Info Version", i32 3}
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!3 = distinct !DISubprogram(linkageName: "foo", file: !1, line: 18, isLocal: false, isDefinition: true, scopeLine: 18, unit: !0)
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!4 = !DIExpression()
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!5 = !DILocalVariable(name: "this", arg: 1, scope: !3, flags: DIFlagArtificial | DIFlagObjectPointer)
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!6 = !DILocation(line: 0, scope: !3)
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