commit a87224e81ea10d677fd4cfee3e971cc3e6b6c04d
author Serguei Katkov <serguei.katkov@azul.com> Mon Apr 12 15:12:28 2021 +0700
committer Copybara-Service <copybara-worker@google.com> Fri Apr 16 12:30:45 2021 -0700
tree cb492b443c251ba212201220170dff7e9696df8d
parent 8857174b3d293b64c820150948abb378250b3b55

[Live Intervals] Teach Greedy RA to recognize special case live-through

Statepoint instruction has a deopt section which is actually live-through the call.
Currently this is handled by special post pass after RA - fixup-statepoint-caller-saved.

This change teaches Greedy RA that if segment of live interval is ended with statepoint
instruction and its reg is used in deopt bundle then this live interval interferes regmask of this statepoint
and as a result caller-saved register cannot be assigned to this live interval.

Reviewers: reames, dantrushin
Reviewed By: reames
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D100296
GitOrigin-RevId: 02265ed7ad27c9bd061b26b0ec6f2232a78097cf