[PATCH] D95489: [AMDGPU] Do not reassign spilled registers

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

rampitec added a comment.

I have done some more debugging on it. The only way to get into that spiller HoistSpillHelper::LRE_DidCloneVirtReg() call is from LiveRangeEdit::eliminateDeadDefs if we split an LI. That lives LRM in the inconsistent state so we cannot call unassign anymore. I will change the check to VRM->getPreSplitReg(Reg), it will work, but I have absolutely no idea how to write a reliable test for it.


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https://reviews.llvm.org/D95489