[llvm] [WIP][AMDGPU] frame index elimination hit assertion for scavenged nonreg (PR #130287)

[Pankaj Dwivedi via llvm-commits]

================
@@ -2750,6 +2750,8 @@ bool SIRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator MI,
           TmpReg = RS->scavengeRegisterBackwards(AMDGPU::SReg_32_XM0RegClass,
                                                  MI, /*RestoreAfter=*/false, 0,
                                                  /*AllowSpill=*/false);
+          if (!TmpReg.isValid())
----------------
PankajDwivedi-25 wrote:

correct, that will do the job.

https://github.com/llvm/llvm-project/pull/130287