[all-commits] [llvm/llvm-project] 118c3f: [BranchProbabilityInfo] Simplify getEdgeProbabilit...

[kazutakahirata via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 118c3f3cf268002d1356253bac3cf5300f054d43
      https://github.com/llvm/llvm-project/commit/118c3f3cf268002d1356253bac3cf5300f054d43
  Author: Kazu Hirata <kazu at google.com>
  Date:   2020-11-06 (Fri, 06 Nov 2020)

  Changed paths:
    M llvm/lib/Analysis/BranchProbabilityInfo.cpp

  Log Message:
  -----------
  [BranchProbabilityInfo] Simplify getEdgeProbability (NFC)

The patch simplifies BranchProbabilityInfo::getEdgeProbability by
handling two cases separately, depending on whether we have edge
probabilities.

- If we have edge probabilities, then add up probabilities for
  successors being equal to Dst.

- Otherwise, return the number of ocurrences divided by the total
  number of successors.

Differential Revision: https://reviews.llvm.org/D90980