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This should turn into one vector shuffle instruction. 

llvm-svn: 27996
This commit is contained in:
Chris Lattner 2006-04-27 21:13:58 +00:00
parent f4f3f0d25f
commit 51fecaa8b3
1 changed files with 14 additions and 0 deletions
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14
llvm/test/Regression/Transforms/InstCombine/vec_insert_to_shuffle.ll Normal file
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@ -0,0 +1,14 @@
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep shufflevec | wc -l | grep 1 &&
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep insertelement &&
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep extractelement
<4 x float> %test(<4 x float> %tmp, <4 x float> %tmp1) {
%tmp4 = extractelement <4 x float> %tmp, uint 1 ; <float> [#uses=1]
%tmp2 = extractelement <4 x float> %tmp, uint 3 ; <float> [#uses=1]
%tmp1 = extractelement <4 x float> %tmp1, uint 0 ; <float> [#uses=1]
%tmp128 = insertelement <4 x float> undef, float %tmp4, uint 0 ; <<4 x float>> [#uses=1]
%tmp130 = insertelement <4 x float> %tmp128, float undef, uint 1 ; <<4 x float>> [#uses=1]
%tmp132 = insertelement <4 x float> %tmp130, float %tmp2, uint 2 ; <<4 x float>> [#uses=1]
%tmp134 = insertelement <4 x float> %tmp132, float %tmp1, uint 3 ; <<4 x float>> [#uses=1]
ret <4 x float> %tmp134
}