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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
28 lines
1.0 KiB
LLVM
28 lines
1.0 KiB
LLVM
; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse,-sse2 -mtriple=i386-apple-darwin -o %t -f
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; RUN: grep shufps %t | count 4
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; RUN: grep movaps %t | count 2
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; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 -mtriple=i386-apple-darwin -o %t -f
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; RUN: grep pshufd %t | count 4
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; RUN: not grep shufps %t
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; RUN: not grep mov %t
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define <4 x float> @t1(<4 x float> %a, <4 x float> %b) nounwind {
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%tmp1 = shufflevector <4 x float> %b, <4 x float> undef, <4 x i32> zeroinitializer
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ret <4 x float> %tmp1
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}
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define <4 x float> @t2(<4 x float> %A, <4 x float> %B) nounwind {
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%tmp = shufflevector <4 x float> %A, <4 x float> %B, <4 x i32> < i32 3, i32 3, i32 3, i32 3 >
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ret <4 x float> %tmp
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}
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define <4 x float> @t3(<4 x float> %A, <4 x float> %B) nounwind {
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%tmp = shufflevector <4 x float> %A, <4 x float> %B, <4 x i32> < i32 4, i32 4, i32 4, i32 4 >
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ret <4 x float> %tmp
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}
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define <4 x float> @t4(<4 x float> %A, <4 x float> %B) nounwind {
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%tmp = shufflevector <4 x float> %A, <4 x float> %B, <4 x i32> < i32 1, i32 3, i32 2, i32 0 >
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ret <4 x float> %tmp
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}
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