derek.holloway
7502bf64a4
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39 lines
1.7 KiB
LLVM
39 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mcpu=corei7-avx -mtriple=x86_64-linux | FileCheck %s
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; A test from pifft (after SLP-vectorization) that fails when we drop the chain on newly merged loads.
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define void @cftx020(ptr nocapture %a) {
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; CHECK-LABEL: cftx020:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: vmovsd {{.*#+}} xmm0 = mem[0],zero
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; CHECK-NEXT: vmovhpd {{.*#+}} xmm0 = xmm0[0],mem[0]
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; CHECK-NEXT: vpermilpd {{.*#+}} xmm1 = mem[1,0]
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; CHECK-NEXT: vaddpd %xmm1, %xmm0, %xmm0
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; CHECK-NEXT: vmovupd (%rdi), %xmm1
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; CHECK-NEXT: vmovupd %xmm0, (%rdi)
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; CHECK-NEXT: vsubpd 16(%rdi), %xmm1, %xmm0
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; CHECK-NEXT: vmovupd %xmm0, 16(%rdi)
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; CHECK-NEXT: retq
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entry:
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%0 = load double, ptr %a, align 8
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%arrayidx1 = getelementptr inbounds double, ptr %a, i64 2
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%1 = load double, ptr %arrayidx1, align 8
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%arrayidx2 = getelementptr inbounds double, ptr %a, i64 1
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%2 = load double, ptr %arrayidx2, align 8
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%arrayidx3 = getelementptr inbounds double, ptr %a, i64 3
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%3 = load double, ptr %arrayidx3, align 8
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%4 = insertelement <2 x double> undef, double %0, i32 0
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%5 = insertelement <2 x double> %4, double %3, i32 1
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%6 = insertelement <2 x double> undef, double %1, i32 0
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%7 = insertelement <2 x double> %6, double %2, i32 1
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%8 = fadd <2 x double> %5, %7
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store <2 x double> %8, ptr %a, align 8
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%9 = insertelement <2 x double> undef, double %0, i32 0
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%10 = insertelement <2 x double> %9, double %2, i32 1
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%11 = insertelement <2 x double> undef, double %1, i32 0
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%12 = insertelement <2 x double> %11, double %3, i32 1
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%13 = fsub <2 x double> %10, %12
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store <2 x double> %13, ptr %arrayidx1, align 8
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ret void
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}
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