[all-commits] [llvm/llvm-project] 8bb6c8: [AMDGPU] Fix data race on RegisterBank initializat...

[huihzhang via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 8bb6c8a22af845618cfd6c27853dca1b48d30ce0
      https://github.com/llvm/llvm-project/commit/8bb6c8a22af845618cfd6c27853dca1b48d30ce0
  Author: Huihui Zhang <huihuiz at quicinc.com>
  Date:   2020-01-29 (Wed, 29 Jan 2020)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp

  Log Message:
  -----------
  [AMDGPU] Fix data race on RegisterBank initialization.

Summary:
The initialization of RegisterBank needs to be done only once. The
logic of AlreadyInit has data race, use llvm::call_once instead.

This is continuing work of D73587.

Reviewers: arsenm, tstellar, ronlieb, efriedma, apazos, nhaehnle

Reviewed By: nhaehnle

Subscribers: kzhuravl, jvesely, wdng, nhaehnle, yaxunl, dstuttard, tpr, t-tye, hiraditya, kerbowa, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D73604