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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-- -mcpu=penryn | FileCheck %s
; PR2647
@0 = external global float, align 16 ; <float*>:0 [#uses=2]
define internal void @a() nounwind {
; CHECK-LABEL: a:
; CHECK: # %bb.0:
; CHECK-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
; CHECK-NEXT: rsqrtss %xmm0, %xmm0
; CHECK-NEXT: movss %xmm0, __unnamed_1
; CHECK-NEXT: retl
load float, float* @0, align 16 ; <float>:1 [#uses=1]
insertelement <4 x float> undef, float %1, i32 0 ; <<4 x float>>:2 [#uses=1]
call <4 x float> @llvm.x86.sse.rsqrt.ss( <4 x float> %2 ) ; <<4 x float>>:3 [#uses=1]
extractelement <4 x float> %3, i32 0 ; <float>:4 [#uses=1]
store float %4, float* @0, align 16
ret void
}
define internal void @b() nounwind {
; CHECK-LABEL: b:
; CHECK: # %bb.0:
; CHECK-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
; CHECK-NEXT: movsldup {{.*#+}} xmm0 = xmm0[0,0,2,2]
; CHECK-NEXT: rsqrtss %xmm0, %xmm0
; CHECK-NEXT: extractps $1, %xmm0, __unnamed_1
; CHECK-NEXT: retl
load float, float* @0, align 16 ; <float>:1 [#uses=1]
insertelement <4 x float> undef, float %1, i32 1 ; <<4 x float>>:2 [#uses=1]
call <4 x float> @llvm.x86.sse.rsqrt.ss( <4 x float> %2 ) ; <<4 x float>>:3 [#uses=1]
extractelement <4 x float> %3, i32 1 ; <float>:4 [#uses=1]
store float %4, float* @0, align 16
ret void
}
declare <4 x float> @llvm.x86.sse.rsqrt.ss(<4 x float>) nounwind readnone
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