Merge r313675 into the 5.0 branch: fix seg-faults printing diagnostics with invalid ordered(n) values

[hahnjo]

Bugzilla Link	35180
Resolution	FIXED
Resolved on	Nov 13, 2017 15:52
Version	unspecified
OS	All
Blocks	#33840
CC	@alexey-bataev,@hfinkel,@tstellar
Fixed by commit(s)	r313675 r318116

Extended Description

When the value specified for n in ordered(n) is larger than the number of loops a segmentation fault can occur in one of two ways when attempting to print out a diagnostic for an associated depend(sink : vec):

1. The iteration vector vec contains less than n items
2. The iteration vector vec contains a variable that is not a loop control variable
   This patch addresses both of these issues.

[hahnjo]

assigned to @alexey-bataev

[tstellar]

Hi Alexey,

Is this OK to merge to the release_50 branch: https://reviews.llvm.org/rL313675

[alexey-bataev]

Yes

[tstellar]

Merged: r318116