[PATCH] D29048: [RegisterCoalescer] Do not call LiveIntervals::getInstructionIndex with a DBG_VALUE

[Brendon Cahoon via Phabricator via llvm-commits]

bcahoon added a comment.

In https://reviews.llvm.org/D29048#653998, @MatzeB wrote:

> At a first glance this looks like it fixes symptoms but not the root cause. It would probably be good if we could get a public reproducer.


I agree with the symptom vs. root cause comment. I also am not sure if I was doing something else that might be problematic.  Especially after I was unable to generate a public test case that reproduced the problem.  I tried a bunch of different things with ARM since that target has a composable SubRegs without any luck.


https://reviews.llvm.org/D29048