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2 Commits

Author SHA1 Message Date
Chad Rosier
2244d9a5d2 [Reassociate] Canonicalize negative constants out of expressions. 
This is a reapplication of r221171, but we only perform the transformation
on expressions which include a multiplication.  We do not transform rem/div
operations as this doesn't appear to be safe in all cases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221721 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-11-11 22:58:35 +00:00
Chad Rosier
bcdc4769f4 [Reassociate] Better preserve NSW/NUW flags. 
Part of PR12985.

Phabricator Revision: http://reviews.llvm.org/D6172

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221555 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-11-07 22:12:57 +00:00