Merging r368873:

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r368873 | void | 2019-08-14 18:44:07 +0200 (Wed, 14 Aug 2019) | 15 lines

Ignore indirect branches from callbr.

Summary:
We can't speculate around indirect branches: indirectbr and invoke. The
callbr instruction needs to be included here.

Reviewers: nickdesaulniers, manojgupta, chandlerc

Reviewed By: chandlerc

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D66200
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llvm-svn: 369085