[llvm-branch-commits] [llvm] [MachinePipeliner] Increase the default maximum MII to 256 (PR #212537)

[Brian Cain via llvm-branch-commits]

androm3da wrote:

> That was the previous revision. Matt questioned adding target configurability when we could simply raise the existing hardcoded limit. I think it is worth first understanding the impact, if any, on Hexagon, where the Pipeliner is enabled by default, before falling back to a target-specific policy. It may be possible to derive a useful limit from scheduling-model properties, but I do not currently have a robust cross-target heuristic or know whether one is practical.

This is a request to evaluate the impact of the change on Hexagon @iajbar @sgundapa.

https://github.com/llvm/llvm-project/pull/212537