Merging r342865:

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r342865 | courbet | 2018-09-24 01:39:48 -0700 (Mon, 24 Sep 2018) | 11 lines

[llvm-exegesis] Fix PR39021.

Summary:
The `set` statements was incorrectly reading the value of the local variable and
setting the value of the parent variable.

Reviewers: tycho, gchatelet, john.brawn

Subscribers: mgorny, tschuett, llvm-commits

Differential Revision: https://reviews.llvm.org/D52343
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llvm-svn: 347811