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Jun Bum Lim e7f0062250 Enhance BranchProbabilityInfo::calcUnreachableHeuristics for InvokeInst
This is recommit of r256028 with minor fixes in unittests:
  CodeGen/Mips/eh.ll
  CodeGen/Mips/insn-zero-size-bb.ll

Original commit message:

When identifying blocks post-dominated by an unreachable-terminated block
in BranchProbabilityInfo, consider only the edge to the normal destination
block if the terminator is InvokeInst and let calcInvokeHeuristics() decide
edge weights for the InvokeInst.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256202 91177308-0d34-0410-b5e6-96231b3b80d8
2015-12-21 22:00:51 +00:00
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