[PATCH] D38566: [SimplifyCFG] don't sink common insts too soon (PR34603)

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a comment.

In https://reviews.llvm.org/D38566#926488, @craig.topper wrote:

> One issue with the struct approach. Suppose I opt-bisect to a failure caused by one of these simplifyCFG passes. How do I invoke that specific version of simplifycfg from opt to debug it or even produce a reduced test case.


I haven't tried opt-bisect. Does it show the sequence of passes leading up to the failure, or just a single pass where the IR goes wrong? If you have the sequence, then you could cross-reference that to the pipeline manager's instantiation to see how it got invoked and mimic that with the cl::opt. That's not ideal of course, but this is a general problem for any pass that takes options, right?


https://reviews.llvm.org/D38566