Eli Friedman 9ae56b9a0e [SCEVAffinator] Fix handling of pwaff complexity limit. ...

nullptr is not a valid affine expression, and none of the callers check
for null, so we eventually hit an isl error and crash.

Instead, invalidate the scop and return a constant zero.

Differential Revision: https://reviews.llvm.org/D46445

llvm-svn: 332309

2018-05-14 23:05:43 +00:00

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