Tim Northover 064da63fcb ARM: avoid duplicating branches during constant islands.
We were using a naive heuristic to determine whether a basic block already had
an unconditional branch at the end. This mostly corresponded to reality
(assuming branches got optimised) because there's not much point in a branch to
the next block, but could go wrong.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221904 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-13 17:58:51 +00:00
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