Kai Luo 8e6d92026c [DAG][PowerPC] Fix dropped nsw flag in SimplifySetCC by adding doesNodeExist helper ...

`SimplifySetCC` invokes `getNodeIfExists` without passing `Flags` argument and `getNodeIfExists` uses a default `SDNodeFlags` to intersect the original flags, as a consequence, flags like `nsw` is dropped. Added a new helper function `doesNodeExist` to check if a node exists without modifying its flags.

Reviewed By: #powerpc, nemanjai

Differential Revision: https://reviews.llvm.org/D89938

2020-11-25 04:39:03 +00:00

967 B

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