[PATCH] D55284: RegisterScavenger: Allow fail without spill

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added a reviewer: MatzeB.
Herald added subscribers: tpr, wdng.

AMDGPU wants to use this in some contexts where
the spilling is either impossible, or a worse alternative
to doing something else.


https://reviews.llvm.org/D55284

Files:
  include/llvm/CodeGen/RegisterScavenging.h
  lib/CodeGen/RegisterScavenging.cpp

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