llvm-project

5052b6ce - [AMDGPU] Scavenge a VGPR to eliminate a frame index (#166979)

[AMDGPU] Scavenge a VGPR to eliminate a frame index (#166979) If the subtarget supports flat scratch SVS mode and there is no SGPR available to replace a frame index, convert a scratch instruction in SS form into SV form and replace the frame index with a scavenged VGPR. Resolves #155902 Co-authored-by: Matt Arsenault <matthew.arsenault@amd.com>