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