llvm-mirror/test/CodeGen/X86/extractps.ll
Dan Gohman 481e1fd0a6 Use MOVSSmr instead of EXTRACTPSmr in the case of extracting
vector element 0 for a store, as it's smaller and faster.

llvm-svn: 58483
2008-10-31 00:57:24 +00:00

28 lines
1.2 KiB
LLVM

; RUN: llvm-as < %s | llc -march=x86 -mcpu=penryn > %t
; RUN: not grep movd %t
; RUN: grep {movss %xmm} %t | count 1
; RUN: grep {extractps \\\$1, %xmm0, } %t | count 1
; PR2647
external global float, align 16 ; <float*>:0 [#uses=2]
define internal void @""() nounwind {
load 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 @""() nounwind {
load 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