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Author SHA1 Message Date
Chad Rosier 5ea14e09e9 [Reassociate] FileCheckize and cleanup a few testcases. No functional change 
intended.

llvm-svn: 210685
 2014-06-11 18:28:45 +00:00
Duncan Sands 763da45e9e Grab-bag of reassociate tweaks. Unify handling of dead instructions and 
instructions to reoptimize.  Exploit this to more systematically eliminate
dead instructions (this isn't very useful in practice but is convenient for
analysing some testcase I am working on).  No need for WeakVH any more: use
an AssertingVH instead.

llvm-svn: 158073
 2012-06-06 14:53:10 +00:00
Owen Anderson f4f80e1f39 Teach reassociate to commute FMul's and FAdd's in order to canonicalize the order of their operands across instructions. This allows for greater CSE opportunities. 
llvm-svn: 156323
 2012-05-07 20:47:23 +00:00