Chris Lattner 4e8137d678 Rename ValueRequiresCast to ShouldOptimizeCast, to better reflect ... what it does. Enhance it to return false to optimizing vector sign extensions from vector comparisions, which is the idiom used to get a splatted vector for a vector comparison. Doing this breaks vector-casts.ll, add some compensating transformations to handle the important case they cover without depending on this canonicalization. This fixes rdar://7434900 a serious pessimization of vector compares. llvm-svn: 95855		2010-02-11 06:26:33 +00:00
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Hello	make -fno-rtti the default unless a directory builds with REQUIRES_RTTI.	2010-01-24 20:43:08 +00:00
IPO	Strip new llvm.dbg.value intrinsic.	2010-02-10 21:19:56 +00:00
InstCombine	Rename ValueRequiresCast to ShouldOptimizeCast, to better reflect	2010-02-11 06:26:33 +00:00
Instrumentation	make -fno-rtti the default unless a directory builds with REQUIRES_RTTI.	2010-01-24 20:43:08 +00:00
Scalar	Make DSE only scan blocks that are reachable from the entry	2010-02-11 05:11:54 +00:00
Utils	Teach SimplifyCFG about magic pointer constants.	2010-02-05 22:03:18 +00:00
Makefile	move instcombine to its own library, it's past time.	2010-01-04 06:23:24 +00:00