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Author SHA1 Message Date
Simon Pilgrim c1a46b729b [DAGCombiner] Vector constant folding for comparisons 
This patch adds support for vector constant folding of integer/float comparisons.

This requires FoldConstantVectorArithmetic to support scalar constant operands (in this case ISD::CONDCASE). In future we should be able to support other scalar constant types as necessary (and possibly start calling FoldConstantVectorArithmetic for all node creations)

Differential Revision: http://reviews.llvm.org/D14683

llvm-svn: 253504
 2015-11-18 21:17:19 +00:00
Simon Pilgrim 0de179b23b [X86][SSE] Fixed arch/triple and regenerated results. 
Tidyup before diffs from new patch.

llvm-svn: 253144
 2015-11-14 20:42:01 +00:00
Nadav Rotem e649d66552 Fix pr11193. 
SHL inserts zeros from the right, thus even when the original
sign_extend_inreg value was of 1-bit, we need to sra.

llvm-svn: 142724
 2011-10-22 12:39:25 +00:00
Nadav Rotem d315157f12 1. Fix the widening of SETCC in WidenVecOp_SETCC. Use the correct return CC type. 
2. Fix a typo in CONCAT_VECTORS which exposed the bug in #1.

llvm-svn: 142648
 2011-10-21 11:42:07 +00:00