2 Commits

Author	SHA1	Message	Date
Shuxin Yang	93b1f12ac1	Disable some unsafe-fp-math DAG-combine transformation after legalization. ... For instance, following transformation will be disabled: x + x + x => 3.0f * x; The problem of these transformations is that it introduces a FP constant, which following Instruction-Selection pass cannot handle. Reviewed by Nadav, thanks a lot! rdar://13445387 llvm-svn: 177933	2013-03-25 22:52:29 +00:00
Shuxin Yang	cadd8a068e	rdar://13126763 ... Fix a bug in DAGCombine. The symptom is mistakenly optimizing expression "x + x*x" into "x * 3.0". llvm-svn: 174239	2013-02-02 00:22:03 +00:00