Dan Gohman e5e1b7b05a Generalize target-independent folding rules for sizeof to handle more ... cases, and implement target-independent folding rules for alignof and offsetof. Also, reassociate reassociative operators when it leads to more folding. Generalize ScalarEvolution's isOffsetOf to recognize offsetof on arrays. Rename getAllocSizeExpr to getSizeOfExpr, and getFieldOffsetExpr to getOffsetOfExpr, for consistency with analagous ConstantExpr routines. Make the target-dependent folder promote GEP array indices to pointer-sized integers, to make implicit casting explicit and exposed to subsequent folding. And add a bunch of testcases for this new functionality, and a bunch of related existing functionality. llvm-svn: 94987		2010-02-01 18:27:38 +00:00
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llvm	Generalize target-independent folding rules for sizeof to handle more	2010-02-01 18:27:38 +00:00
llvm-c	Changed constants to an enum so as not to pollute the	2010-01-27 23:20:51 +00:00