[PATCH] D28527: Check for register clobbers when merging a vreg live range with a reserved physreg in RegisterCoalescer.

[Matthias Braun via Phabricator via llvm-commits]

MatzeB accepted this revision.
MatzeB added a reviewer: MatzeB.
MatzeB added a comment.
This revision is now accepted and ready to land.

LGTM
The "no-def+!allocatable => constant" rule has been there for a long time in MachineRegisterInfo::isConstantPhysReg(), not sure we need to check/question it as part of this commit...


https://reviews.llvm.org/D28527