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3 Commits

Author SHA1 Message Date
Stephen Lin 6dd347b39f Add newlines at end of test files, no functionality change 
llvm-svn: 186263
 2013-07-13 22:00:58 +00:00
Chris Lattner 6b657aed33 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
Dale Johannesen 0171dc30ff When checking that the necessary bits are zero in 
order to reduce ((x<<30)>>24) to x<<6, check the
correct bits.  PR 8547.

llvm-svn: 118665
 2010-11-10 01:30:56 +00:00