[PATCH] D30350: [LSR] Add a cap for reassociation of AllFixupsOutsideLoop type LSRUse to protect compile time

[Sanjoy Das via Phabricator via llvm-commits]

sanjoy added a comment.

Hi Wei,

If this indeed is a problem with `ScalarEvolution::getZeroExtendExpr` then you should be able to write a `.ll` file that triggers the exponential behavior on `-analyze -scalar-evolution`.  Do you mind giving writing such a test case (as a first step) a shot?


Repository:
  rL LLVM

https://reviews.llvm.org/D30350