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Author SHA1 Message Date
David Majnemer 2e02ba78d5 [InstCombine] Don't transform compares of calls to functions named fabs{f,l,} 
InstCombine wants to optimize compares of calls to fabs with zero.
However, we didn't have the necessary legality checking to verify that
the function call had the same behavior as fabs.

llvm-svn: 266452
 2016-04-15 17:21:03 +00:00
David Majnemer 3ee5f34469 [InstCombine] We folded an fcmp to an i1 instead of a vector of i1 
Remove an ad-hoc transform in InstCombine and replace it with more
general machinery (ValueTracking, InstructionSimplify and VectorUtils).

This fixes PR27332.

llvm-svn: 266175
 2016-04-13 06:55:52 +00:00