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PR2957

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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.

A clean up of x86 shuffle code, and some canonicalizing in DAGCombiner is next.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69952 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nate Begeman
2009-04-24 03:42:54 +00:00
parent 98d07102d6
commit b706d29f9c
25 changed files with 1637 additions and 2184 deletions
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6
test/CodeGen/X86/vec_clear.ll
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@@ -1,5 +1,7 @@
; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 -mtriple=i386-apple-darwin | not grep and
; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 -mtriple=i386-apple-darwin | grep psrldq
; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 -mtriple=i386-apple-darwin -o %t -f
; RUN: not grep and %t
; RUN: not grep psrldq %t
; RUN: grep xorps %t
define <4 x float> @test(<4 x float>* %v1) nounwind {
%tmp = load <4 x float>* %v1 ; <<4 x float>> [#uses=1]