[PATCH] D57953: [Jump Threading] Convert conditional branches into unconditional branches using GVN results

Florian Hahn via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Thu Dec 26 03:19:06 PST 2019


fhahn added a comment.

In D57953#1796475 <https://reviews.llvm.org/D57953#1796475>, @masakiarai wrote:

> I'm sorry to stagnate this for a very long time.
>  According to the reviewer's comments, I am preparing this as a new optimization pass as 'Control Dependent DCE'.
>  With enhancements and additional test programs, I will submit a new review request.


I’ll take a closer look in a bit, but I think there might be a different approach using predicate info to solve this problem relatively easily. I’ll see if I can put something together. In general it should be enough to just simplify the condition to true and let other passes do the cCFG cleanup


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