| ; RUN: llc -verify-machineinstrs -mcpu=pwr8 -mtriple=powerpc64le-unknown-linux-gnu -O3 < %s | FileCheck %s | |
| ; This test verifies that VSX swap optimization works for the | |
| ; doubleword splat idiom. | |
| @a = external global <2 x double>, align 16 | |
| @b = external global <2 x double>, align 16 | |
| define void @test(double %s) { | |
| entry: | |
| %0 = insertelement <2 x double> undef, double %s, i32 0 | |
| %1 = shufflevector <2 x double> %0, <2 x double> undef, <2 x i32> zeroinitializer | |
| %2 = load <2 x double>, <2 x double>* @a, align 16 | |
| %3 = fadd <2 x double> %0, %2 | |
| store <2 x double> %3, <2 x double>* @b, align 16 | |
| ret void | |
| } | |
| ; CHECK-LABEL: @test | |
| ; CHECK-DAG: xxspltd | |
| ; CHECK-DAG: lxvd2x | |
| ; CHECK: xvadddp | |
| ; CHECK: stxvd2x | |
| ; CHECK-NOT: xxswapd |