[llvm-commits] [PATCH] Add single entry / single exit accessors.

[Andreas Simbuerger]

Hi,

this time from the correct mail-address ;-)
This patch adds support for single entry / single exit edge
accessors to regions.

A (refined) region that has only 2 transition edges (1 entry, 1 exit)
to its parent region is defined as a simple region.

Both methods added, return null if there is more than one entry/exit edge.

Cheers,
Andreas

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