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8bb9ea4ceb
This changes the scalar non-intrinsic non-avx roundss/sd instruction definitions not to read their destination register - allowing partial dependency breaking. This fixes PR31143. Differential Revision: https://reviews.llvm.org/D27323 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@288703 91177308-0d34-0410-b5e6-96231b3b80d8
61 lines
2.0 KiB
LLVM
61 lines
2.0 KiB
LLVM
; RUN: llc -mtriple=x86_64-pc-linux-gnu -mattr=+sse4.2 < %s | FileCheck %s
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; CHECK-LABEL: testss:
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; CHECK: movss {{.*}}, %[[XMM0:xmm[0-9]+]]
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; CHECK: xorps %[[XMM1:xmm[0-9]+]], %[[XMM1]]
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; CHECK: roundss $9, %[[XMM0]], %[[XMM1]]
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define void @testss(float* nocapture %a, <4 x float>* nocapture %b, i32 %k) {
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entry:
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br label %for.body
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for.body:
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds float, float* %a, i64 %indvars.iv
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%v = load float, float* %arrayidx, align 4
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%floor = call float @floorf(float %v)
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%sub = fsub float %floor, %v
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%v1 = insertelement <4 x float> undef, float %sub, i32 0
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%br = shufflevector <4 x float> %v1, <4 x float> undef, <4 x i32> <i32 0, i32 0, i32 0, i32 0>
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store volatile <4 x float> %br, <4 x float>* %b, align 4
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%indvars.iv.next = add i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %k
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br i1 %exitcond, label %for.end, label %for.body
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for.end:
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ret void
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}
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; CHECK-LABEL: testsd:
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; CHECK: movsd {{.*}}, %[[XMM0:xmm[0-9]+]]
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; CHECK: xorps %[[XMM1:xmm[0-9]+]], %[[XMM1]]
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; CHECK: roundsd $9, %[[XMM0]], %[[XMM1]]
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define void @testsd(double* nocapture %a, <2 x double>* nocapture %b, i32 %k) {
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entry:
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br label %for.body
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for.body:
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds double, double* %a, i64 %indvars.iv
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%v = load double, double* %arrayidx, align 4
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%floor = call double @floor(double %v)
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%sub = fsub double %floor, %v
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%v1 = insertelement <2 x double> undef, double %sub, i32 0
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%br = shufflevector <2 x double> %v1, <2 x double> undef, <2 x i32> <i32 0, i32 0>
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store volatile <2 x double> %br, <2 x double>* %b, align 4
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%indvars.iv.next = add i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %k
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br i1 %exitcond, label %for.end, label %for.body
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for.end:
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ret void
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}
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declare float @floorf(float) nounwind readnone
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declare double @floor(double) nounwind readnone
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