Benjamin Kramer 19ea37059a SCEV: Make the final add of an inbounds GEP nuw if we know that the index is positive. ... We can't do this for the general case as saying a GEP with a negative index doesn't have unsigned wrap isn't valid for negative indices. %gep = getelementptr inbounds i32* %p, i64 -1 But an inbounds GEP cannot run past the end of address space. So we check for the very common case of a positive index and make GEPs derived from that NUW. Together with Andy's recent non-unit stride work this lets us analyze loops like void foo3(int *a, int *b) { for (; a < b; a++) {} } PR12375, PR12376. Differential Revision: http://llvm-reviews.chandlerc.com/D2033 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193514 91177308-0d34-0410-b5e6-96231b3b80d8		2013-10-28 07:30:06 +00:00
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BasicAA	Revert r193251 : Use address-taken to disambiguate global variable and indirect memops.	2013-10-27 03:08:44 +00:00
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CostModel	X86: Custom lower sext v16i8 to v16i16, and the corresponding truncate.	2013-10-23 21:06:07 +00:00
DependenceAnalysis
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ScalarEvolution	SCEV: Make the final add of an inbounds GEP nuw if we know that the index is positive.	2013-10-28 07:30:06 +00:00
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