[PATCH] D28625: [InstCombine] try to shrink bitwise logic with phi operand

Sanjay Patel via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Tue Jan 17 16:26:48 PST 2017

spatel added a comment.

In https://reviews.llvm.org/D28625#647608, @efriedma wrote:

> Would it be possible to come up with some more general optimization?  Making integer operations in loops narrower can be useful (for vectorization etc.), but specifically special-casing a boolean "or" reduction doesn't seem like something that will trigger frequently enough to matter.

My laziness of only including one test in the patch misled you. :)
Although 'any_of' and 'all_of' are my motivating cases, this patch is neither limited to 'or' nor to bools. I'll update the tests to show this.


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