alex-t 5157f984ae [AMDGPU] Enable divergence-driven XNOR selection ...

Currently not (xor_one_use) pattern is always selected to S_XNOR irrelative od the node divergence.
This relies on further custom selection pass which converts to VALU if necessary and replaces with V_NOT_B32 ( V_XOR_B32)
on those targets which have no V_XNOR.
Current change enables the patterns which explicitly select the not (xor_one_use) to appropriate form.
We assume that xor (not) is already turned into the not (xor) by the combiner.

Reviewed By: rampitec

Differential Revision: https://reviews.llvm.org/D116270

2022-01-26 15:33:10 +03:00

8.7 KiB

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