; 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(double* 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, double* %a, align 8 %arrayidx1 = getelementptr inbounds double, double* %a, i64 2 %1 = load double, double* %arrayidx1, align 8 %arrayidx2 = getelementptr inbounds double, double* %a, i64 1 %2 = load double, double* %arrayidx2, align 8 %arrayidx3 = getelementptr inbounds double, double* %a, i64 3 %3 = load double, double* %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 %9 = bitcast double* %a to <2 x double>* store <2 x double> %8, <2 x double>* %9, align 8 %10 = insertelement <2 x double> undef, double %0, i32 0 %11 = insertelement <2 x double> %10, double %2, i32 1 %12 = insertelement <2 x double> undef, double %1, i32 0 %13 = insertelement <2 x double> %12, double %3, i32 1 %14 = fsub <2 x double> %11, %13 %15 = bitcast double* %arrayidx1 to <2 x double>* store <2 x double> %14, <2 x double>* %15, align 8 ret void }