[PATCH] D46422: [LCSSA] Iteratively remove unused PHI nodes in formLCSSAForInstructions

[Bjorn Pettersson via Phabricator via llvm-commits]

bjope added a comment.

In https://reviews.llvm.org/D46422#1088181, @mzolotukhin wrote:

> Hi,
>
> First of all, please clean-up the testcase. The bugpoint-output tests are impossible to understand and maintain (it is impossible to say if such a test checks anything at all after some time). I'm pretty sure you can expose the same issue with much a smaller test.


Ok, I will make an attempt to reduce it further, but if there was an easy way to trigger the problem, then I guess we would have seen it a long time ago (and bugpoint would have been able to remove some more basic blocks).
If it is preferred, then I can remove all the checks and keep it as a "just check that this no longer asserts" kind of test.


Repository:
  rL LLVM

https://reviews.llvm.org/D46422