The patch set unroll disable pragma when unroll

with user specified count has been applied.

Summary:
Previously SetLoopAlreadyUnrolled() set the disable pragma only if
there was some loop metadata.
Now it set the pragma in all cases. This helps to prevent multiple
unroll when -unroll-count=N is given.

Reviewers: mzolotukhin

Differential Revision: http://reviews.llvm.org/D20765

From: Evgeny Stupachenko <evstupac@gmail.com>
llvm-svn: 272195