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3 Commits

Author SHA1 Message Date
Chris Lattner
6e84f48cd8 Enhance a bunch of transformations in instcombine to start generating 
exact/nsw/nuw shifts and have instcombine infer them when it can prove
that the relevant properties are true for a given shift without them.

Also, a variety of refactoring to use the new patternmatch logic thrown
in for good luck.  I believe that this takes care of a bunch of related
code quality issues attached to PR8862.

llvm-svn: 125267
 2011-02-10 05:36:31 +00:00
Chris Lattner
2d3554c3d9 merge sext-2 into sext.ll 
llvm-svn: 90293
 2009-12-02 05:34:35 +00:00
Chris Lattner
3781027d07 rename test 
llvm-svn: 90292
 2009-12-02 05:32:33 +00:00