Andrew Trick 87716c93c2 Added isValidRewrite() to check the result of ScalarEvolutionExpander. ...

SCEV may generate expressions composed of multiple pointers, which can
lead to invalid GEP expansion. Until we can teach SCEV to follow strict
pointer rules, make sure no bad GEPs creep into IR.
Fixes rdar://problem/9038671.

llvm-svn: 127839

2011-03-17 23:51:11 +00:00

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