[PATCH] D89392: [GlobalISel] Fold unary opcodes in CSEMIRBuilder

Wed Oct 14 07:53:19 PDT 2020

gargaroff added a comment.

In D89392#2330160 <https://reviews.llvm.org/D89392#2330160>, @foad wrote:

> In D89392#2330153 <https://reviews.llvm.org/D89392#2330153>, @gargaroff wrote:
>
>> Is there anything I need to do to use the CSEMIRBuilder?
>
> I think it's enabled by default for some passes, unless you override TargetPassConfig::isGISelCSEEnabled to return false, and enabled in the combiner only if you pass some CSEInfo into combineMachineInstrs, which no in-tree targets do.

Understood, thanks. I'll try to test this tomorrow and will report back.

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  https://reviews.llvm.org/D89392/new/

https://reviews.llvm.org/D89392