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Favors pshufd over shufps when shuffling elements from one vector. pshufd is faster than shufps.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49244 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2008-04-05 00:30:36 +00:00
parent a4091d34f3
commit 0c0f83ff5d
12 changed files with 95 additions and 67 deletions
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2
test/CodeGen/X86/vec_shuffle-5.ll
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@@ -2,7 +2,7 @@
; RUN: grep movhlps %t | count 1
; RUN: grep shufps %t | count 1
define void @test() {
define void @test() nounwind {
%tmp1 = load <4 x float>* null ; <<4 x float>> [#uses=2]
%tmp2 = shufflevector <4 x float> %tmp1, <4 x float> < float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00 >, <4 x i32> < i32 0, i32 1, i32 6, i32 7 > ; <<4 x float>> [#uses=1]
%tmp3 = shufflevector <4 x float> %tmp1, <4 x float> zeroinitializer, <4 x i32> < i32 2, i32 3, i32 6, i32 7 > ; <<4 x float>> [#uses=1]