Alp Toker ac2d2e0a3d Tweak r199835 to use can_execute() instead of exists()
The execution code path crashes if it can't execute the binary so we might as
well take precautions here.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199844 91177308-0d34-0410-b5e6-96231b3b80d8
2014-01-22 22:17:51 +00:00
..
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