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Author SHA1 Message Date
Owen Anderson c7be519dc0 Preserve fast-math flags when folding (fsub x, (fneg y)) to (fadd x, y). 
llvm-svn: 187462
 2013-07-30 23:53:17 +00:00
Owen Anderson e37c2e4d11 When InstCombine tries to fold away (fsub x, (fneg y)) into (fadd x, y), it is 
also worthwhile for it to look through FP extensions and truncations, whose
application commutes with fneg.

llvm-svn: 187249
 2013-07-26 21:40:29 +00:00