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2 Commits

Author SHA1 Message Date
Owen Anderson
43c2c4c5e4 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
841856eb0b 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