Shuxin Yang b1ccfb3a54 [Fast-math] Disable "(C1/X)*C2 => (C1*C2)/X" if C1/X has multiple uses. ... If "C1/X" were having multiple uses, the only benefit of this transformation is to potentially shorten critical path. But it is at the cost of instroducing additional div. The additional div may or may not incur cost depending on how div is implemented. If it is implemented using Newton–Raphson iteration, it dosen't seem to incur any cost (FIXME). However, if the div blocks the entire pipeline, that sounds to be pretty expensive. Let CodeGen to take care this transformation. This patch sees 6% on a benchmark. rdar://15032743 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191037 91177308-0d34-0410-b5e6-96231b3b80d8		2013-09-19 21:13:46 +00:00
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InstCombine	[Fast-math] Disable "(C1/X)*C2 => (C1*C2)/X" if C1/X has multiple uses.	2013-09-19 21:13:46 +00:00
Instrumentation	[msan] Wrap indirect functions.	2013-09-19 15:22:35 +00:00
IPO	Bugfix for PR17099:	2013-09-17 09:36:11 +00:00
ObjCARC	Revert "Give internal classes hidden visibility."	2013-09-11 18:05:11 +00:00
Scalar	GVN proceeds in the presence of dead code.	2013-09-19 17:22:51 +00:00
Utils	Replace some unnecessary vector copies with references.	2013-09-15 22:04:42 +00:00
Vectorize	Prevent LoopVectorizer and SLPVectorizer running if the target has no vector registers.	2013-09-18 12:43:35 +00:00
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