[all-commits] [llvm/llvm-project] a57fe2: [JumpThreading] Fix branch probabilities in Duplic...

[Yevgeny Rouban via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: a57fe210ff7cf553b721bf08e74df42b0ae1df38
      https://github.com/llvm/llvm-project/commit/a57fe210ff7cf553b721bf08e74df42b0ae1df38
  Author: Yevgeny Rouban <yrouban at azul.com>
  Date:   2020-11-17 (Tue, 17 Nov 2020)

  Changed paths:
    M llvm/lib/Transforms/Scalar/JumpThreading.cpp
    A llvm/test/Transforms/JumpThreading/thread-prob-3.ll

  Log Message:
  -----------
  [JumpThreading] Fix branch probabilities in DuplicateCondBranchOnPHIIntoPred()

When instructions are cloned from block BB to PredBB in the method
DuplicateCondBranchOnPHIIntoPred() number of successors of PredBB
changes from 1 to number of successors of BB. So we have to copy
branch probabilities from BB to PredBB.

Reviewed By: Kazu Hirata

Differential Revision: https://reviews.llvm.org/D90841