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Commit 925ddf1a authored by Balaram Makam's avatar Balaram Makam
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[Local] Fix a bug in the domtree update logic for MergeBasicBlockIntoOnlyPred. 

Summary: For some irreducible CFG the domtree nodes might be dead, do not update domtree for dead nodes.

Reviewers: kuhar, dberlin, hfinkel

Reviewed By: kuhar

Subscribers: llvm-commits, mcrosier

Differential Revision: https://reviews.llvm.org/D38960

llvm-svn: 316582
parent 3e94e441
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