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Author SHA1 Message Date
Andrew Trick 7fa4e0fea6 SCEV: Add MarkPendingLoopPredicates to avoid recursive isImpliedCond. 
getUDivExpr attempts to simplify by checking for overflow.
isLoopEntryGuardedByCond then evaluates the loop predicate which
may lead to the same getUDivExpr causing endless recursion.

Fixes PR12868: clang 3.2 segmentation fault.

llvm-svn: 157092
 2012-05-19 00:48:25 +00:00