Andreas Simbuerger 83ed861ea2 Check for an empty error log. ...

Fixes #19976.

The error log does not contain an error, in case we reject a candidate
without generating a diagnostic message by using invalid<>(...). This is
the case for the top-level region of a function.

The patch comes without a test-case because adding a useful one requires
additional code just for triggering it. Before the patch it would only trigger,
if we try to print the CFG with Scop error annotations.

llvm-svn: 210753

2014-06-12 07:25:08 +00:00

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