[PATCH] D142071: [RISCV] Enable preferZeroCompareBranch to optimize branch on zero in codegenprepare

[Alex Bradbury via Phabricator via llvm-commits]

asb added a comment.

Thanks for this! We typically add CHECK lines for both RV32 and RV64, and I think it would be worth doing here. I did look at this before, but held off as it seemed to cause a regression on one of the SystemZ test cases and I didn't have a chance to look at it.

Trying now, it looks like that's only currently the case on optbranch_64 with RV32 - I don't know if you've looked at that regression at all?

It might be worth grabbing the optbranch_32 test case from SystemZ as well to expand the test coverage.


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https://reviews.llvm.org/D142071