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9008ca6b6b
PR2957 ISD::VECTOR_SHUFFLE now stores an array of integers representing the shuffle mask internal to the node, rather than taking a BUILD_VECTOR of ConstantSDNodes as the shuffle mask. A value of -1 represents UNDEF. In addition to eliminating the creation of illegal BUILD_VECTORS just to represent shuffle masks, we are better about canonicalizing the shuffle mask, resulting in substantially better code for some classes of shuffles. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70225 91177308-0d34-0410-b5e6-96231b3b80d8
14 lines
647 B
LLVM
14 lines
647 B
LLVM
; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 -mtriple=i386-apple-darwin -o %t -f
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; RUN: not grep and %t
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; RUN: not grep psrldq %t
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; RUN: grep xorps %t
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define <4 x float> @test(<4 x float>* %v1) nounwind {
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%tmp = load <4 x float>* %v1 ; <<4 x float>> [#uses=1]
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%tmp15 = bitcast <4 x float> %tmp to <2 x i64> ; <<2 x i64>> [#uses=1]
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%tmp24 = and <2 x i64> %tmp15, bitcast (<4 x i32> < i32 0, i32 0, i32 -1, i32 -1 > to <2 x i64>) ; <<2 x i64>> [#uses=1]
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%tmp31 = bitcast <2 x i64> %tmp24 to <4 x float> ; <<4 x float>> [#uses=1]
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ret <4 x float> %tmp31
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}
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