[all-commits] [llvm/llvm-project] b5cdee: [PGO][PGSO] Update BFI in CodeGenPrepare::optimize...

[hjyamauchi via All-commits]

  Branch: refs/heads/release/10.x
  Home:   https://github.com/llvm/llvm-project
  Commit: b5cdee9bdce49b31c74b0cf4f8231f66bbc2708e
      https://github.com/llvm/llvm-project/commit/b5cdee9bdce49b31c74b0cf4f8231f66bbc2708e
  Author: Hiroshi Yamauchi <yamauchi at google.com>
  Date:   2020-01-23 (Thu, 23 Jan 2020)

  Changed paths:
    M llvm/lib/CodeGen/CodeGenPrepare.cpp
    M llvm/test/CodeGen/X86/cmov-into-branch.ll

  Log Message:
  -----------
  [PGO][PGSO] Update BFI in CodeGenPrepare::optimizeSelectInst.

Summary:
Without the BFI update, some hot blocks are incorrectly treated as cold code.

This fixes a FDO perf regression in the TSVC benchmark from D71288.

Reviewers: davidxl

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D73146

(cherry picked from commit ddbc728828c70728473b47c9f7427aa9514f3d17)