Jingyue Wu 80d7caa6b3 [NaryReassociate] run NaryReassociate iteratively ... Summary: An alternative is to use a worklist approach. However, that approach would break the traversing order so that we couldn't lookup SeenExprs efficiently. I don't see a clear winner here, so I picked the easier approach. Along with two minor improvements: 1. preserves ScalarEvolution by forgetting instructions replaced 2. removes dead code locally avoiding the need of running DCE afterwards Test Plan: add to slsr-add.ll a test that requires multiple iterations Reviewers: broune, dberlin, atrick, meheff Reviewed By: atrick Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D9058 llvm-svn: 235151		2015-04-17 00:25:10 +00:00
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nary-add.ll	[NaryReassociate] run NaryReassociate iteratively	2015-04-17 00:25:10 +00:00