tree 6ee572bcf89a5676507b74d6464dc6698278ca47
parent f409340cc217c55c3960a375054a17b2bc927e53
author Matt Arsenault <Matthew.Arsenault@amd.com> 1740620343 +0700
committer GitHub <noreply@github.com> 1740620343 +0700
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AMDGPU: Do not try to commute instruction with same input register (#127562)

There's little point to trying to commute an instruction if the
two operands are already the same.

This avoids an assertion in a future patch, but this likely isn't the
correct fix. The worklist management in SIFoldOperands is dodgy, and
we should probably fix it to work like PeepholeOpt (i.e. stop looking
at use lists, and fold from users). This is an extension of the already
handled special case which it's trying to avoid folding an instruction
which is already being folded.