Merging r340931:

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r340931 | atanasyan | 2018-08-29 07:53:55 -0700 (Wed, 29 Aug 2018) | 6 lines

[mips] Involves microMIPS's jump in the analyzable branch set

Involves microMIPS's jump in the analyzable branch set to reduce some
code patterns.

Differential revision: https://reviews.llvm.org/D50613
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llvm-svn: 346735