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Author SHA1 Message Date
Xin Tong 54b4227f32 Revert "Simplify blockaddress usage before giving up in MergeBlockIntoPredecessor" 
This reverts commit f976cf4cca0794267f28b54e468007fd476d37d9.

I am reverting this because it causes break in a few bots and its going
to take me sometime to look at this.

llvm-svn: 334993
 2018-06-18 23:20:08 +00:00
Xin Tong bfd8cfcb8d Simplify blockaddress usage before giving up in MergeBlockIntoPredecessor 
Summary:
Simplify blockaddress usage before giving up in MergeBlockIntoPredecessor

This is a missing small optimization in MergeBlockIntoPredecessor.

This helps with one simplifycfg test which expects this case to be handled.

Reviewers: davide, spatel, brzycki, asbirlea

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D48284

llvm-svn: 334992
 2018-06-18 22:59:13 +00:00
Matt Arsenault 06dfbb50d7 Utils: Fix DomTree update for entry block 
If SplitBlockPredecessors was used on a function entry block,
it wouldn't update the dominator tree.

llvm-svn: 323928
 2018-01-31 22:54:37 +00:00