[InstCombine]: foldSelectICmpAndAnd(): and is commutative

Authored by lebedev.ri on Apr 13 2018, 2:57 AM.


[InstCombine]: foldSelectICmpAndAnd(): and is commutative

The fold added in D45108 did not account for the fact that
the and instruction is commutative, and if the mask is a variable,
the mask variable and the fold variable may be swapped.

I have noticed this by accident when looking into PR6773

This extends/generalizes that fold, so it is handled too.

Reviewers: spatel, craig.topper

Reviewed By: spatel

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D45539

llvm-svn: 330001