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2 Commits

Author SHA1 Message Date
Matt Arsenault
a95bd86b3c DAGCombiner: Reduce 64-bit BFE pattern to pattern on 32-bit component 
If the extracted bits are restricted to the upper half or lower half,
this can be truncated.

llvm-svn: 267024
 2016-04-21 18:03:06 +00:00
Matt Arsenault
8238b5c22c AMDGPU: Set HasExtractBitInsn 
This currently does not have the control over the bitwidth,
and there are missing optimizations to reduce the integer to
32-bit if it can be.

But in most situations we do want the sinking to occur.

llvm-svn: 262296
 2016-03-01 04:58:17 +00:00