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

[Wei Mi via llvm-commits]

On Sat, Mar 25, 2017 at 10:36 PM, Sanjoy Das via Phabricator
<reviews at reviews.llvm.org> wrote:
> sanjoy added a comment.
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> Hi Wei,
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> 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?

Sanjoy, good suggestion. I will write such a testcase.

Wei.

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> Repository:
>   rL LLVM
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> https://reviews.llvm.org/D30350
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