Philip Reames 28865da374 [LSR][term-fold] Adjust expansion budget based on trip count (#80304) ...

Follow up to https://github.com/llvm/llvm-project/pull/74747

This change extends the previously added fixed expansion threshold by
scaling down the cost allowed for an expansion for a loop with either a
small known trip count or a profile which indicates the trip count is
likely small. The goal here is to improve code generation for a loop
nest where the outer loop has a high trip count, and the inner loop runs
only a handful of iterations.

---------

Co-authored-by: Nikita Popov <github@npopov.com>

2024-02-02 08:57:26 -08:00

267 KiB

Raw Blame History

View Raw