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An identity shuffle shouldn't generate any permute code.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27316 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-03-31 22:16:19 +00:00
parent b5c4d17a6c
commit 9546720484
1 changed files with 16 additions and 0 deletions
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16
test/CodeGen/Generic/vector-identity-shuffle.ll Normal file
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; RUN: llvm-as < %s | llc -march=ppc32 -mcpu=g5 | grep _test &&
; RUN: llvm-as < %s | llc -march=ppc32 -mcpu=g5 | not grep vperm
void %test(<4 x float> *%tmp2.i) {
%tmp2.i = load <4x float>* %tmp2.i
%xFloat0.48 = extractelement <4 x float> %tmp2.i, uint 0 ; <float> [#uses=1]
%inFloat0.49 = insertelement <4 x float> undef, float %xFloat0.48, uint 0 ; <<4 x float>> [#uses=1]
%xFloat1.50 = extractelement <4 x float> %tmp2.i, uint 1 ; <float> [#uses=1]
%inFloat1.52 = insertelement <4 x float> %inFloat0.49, float %xFloat1.50, uint 1 ; <<4 x float>> [#uses=1]
%xFloat2.53 = extractelement <4 x float> %tmp2.i, uint 2 ; <float> [#uses=1]
%inFloat2.55 = insertelement <4 x float> %inFloat1.52, float %xFloat2.53, uint 2 ; <<4 x float>> [#uses=1]
%xFloat3.56 = extractelement <4 x float> %tmp2.i, uint 3 ; <float> [#uses=1]
%inFloat3.58 = insertelement <4 x float> %inFloat2.55, float %xFloat3.56, uint 3 ; <<4 x float>> [#uses=4]
store <4 x float> %inFloat3.58, <4x float>* %tmp2.i
ret void
}