Nate Begeman c1a09c7dfa 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. A clean up of x86 shuffle code, and some canonicalizing in DAGCombiner is next. llvm-svn: 69952		2009-04-24 03:42:54 +00:00
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llvm	PR2957	2009-04-24 03:42:54 +00:00
llvm-c	add AvailableExternally linkage to C bindings.	2009-04-13 06:25:37 +00:00