[llvm] r295378 - [LSR] Prevent formula with SCEVAddRecExpr type of Reg from Sibling loops

[Davide Italiano via llvm-commits]

On Thu, Feb 16, 2017 at 1:27 PM, Wei Mi via llvm-commits
<llvm-commits at lists.llvm.org> wrote:
> Author: wmi
> Date: Thu Feb 16 15:27:31 2017
> New Revision: 295378
>
> URL: http://llvm.org/viewvc/llvm-project?rev=295378&view=rev
> Log:
> [LSR] Prevent formula with SCEVAddRecExpr type of Reg from Sibling loops
>

Sorry if I'm late, but our downstream branch was a little bit behind.
With this test LTO time of some of our internal codebases skyrockets.
running `llc` on the test attached takes ~7 seconds with the change
reverted and I had to kill it after 10 minutes with the change in. Can
you please take a look, and see if you can fix this easily (or
revert?) I'd like to get our bots green again.


-- 
Davide

"There are no solved problems; there are only problems that are more
or less solved" -- Henri Poincare
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