sameeran joshi 4a51691a85 [Flang][OpenACC] Fix for branching out issue in OpenACC parallel construct. ...

From OpenACC 3.0 Standards document
	840 • A program may not branch into or out of an OpenACC parallel construct.
	Exits are allowed provided it does not cause an exit outside the parallel region.

	Test case exits out of the inner do loop, but it is still inside the parallel region.
	Patch tries to extract labels from block attached to a construct,
	If the exit is to a label not in the collected list then flags an error.

Reviewed By: tskeith

Differential Revision: https://reviews.llvm.org/D87906

2020-10-19 21:46:47 +05:30

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