John Brawn 97cc283117 [ARM] Adjust ifcvt heuristic for the diamond ifcvt case
When we have a diamond ifcvt the fallthough block will have a branch at the end
of it that disappears when predicated, so discount it from the predication cost.

Differential Revision: https://reviews.llvm.org/D34952

llvm-svn: 307788
2017-07-12 13:23:10 +00:00
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