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2 Commits

Author SHA1 Message Date
Owen Anderson
605b3427a9 Preserve fast-math flags when folding (fsub x, (fneg y)) to (fadd x, y). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187462 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-07-30 23:53:17 +00:00
Owen Anderson
0c326f07ca 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187249 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-07-26 21:40:29 +00:00