3 Commits

Author SHA1 Message Date
Bjorn Pettersson
b280ee1dd7 [test] Use -passes=instsimplify instead of -instsimplify in a number of tests. NFC
Another step moving away from the deprecated syntax of specifying
pass pipeline in opt.

Differential Revision: https://reviews.llvm.org/D119080
2022-02-07 14:26:58 +01:00
Juneyoung Lee
5af8bacc94 [InstSimplify] Add more poison folding optimizations
This adds more poison folding optimizations to InstSimplify.

Since all binary operators propagate poison, these are fine.

Also, the precondition of `select cond, undef, x` -> `x` is relaxed to allow the case when `x` is undef.

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D104661
2021-06-23 20:25:24 +09:00
Juneyoung Lee
864dda5fd5 [InstSimplify] Add tests that fold instructions with poison operands (NFC) 2020-12-02 01:01:59 +09:00