Dan Gohman 2649491f9c Teach SCEVExpander to expand arithmetic involving pointers into GEP ... instructions. It attempts to create high-level multi-operand GEPs, though in cases where this isn't possible it falls back to casting the pointer to i8* and emitting a GEP with that. Using GEP instructions instead of ptrtoint+arithmetic+inttoptr helps pointer analyses that don't use ScalarEvolution, such as BasicAliasAnalysis. Also, make the AddrModeMatcher more aggressive in handling GEPs. Previously it assumed that operand 0 of a GEP would require a register in almost all cases. It now does extra checking and can do more matching if operand 0 of the GEP is foldable. This fixes a problem that was exposed by SCEVExpander using GEPs. llvm-svn: 72093		2009-05-19 02:15:55 +00:00
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llvm	Teach SCEVExpander to expand arithmetic involving pointers into GEP	2009-05-19 02:15:55 +00:00
llvm-c	Rename PaddedSize to AllocSize, in the hope that this	2009-05-09 07:06:46 +00:00