[all-commits] [llvm/llvm-project] 91618d: [ARM] Fix data race on RegisterBank initialization.

[huihzhang via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 91618d940ea3009d7e1489df4c8ca12017a0f612
      https://github.com/llvm/llvm-project/commit/91618d940ea3009d7e1489df4c8ca12017a0f612
  Author: Huihui Zhang <huihuiz at quicinc.com>
  Date:   2020-01-29 (Wed, 29 Jan 2020)

  Changed paths:
    M llvm/lib/Target/ARM/ARMRegisterBankInfo.cpp

  Log Message:
  -----------
  [ARM] 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, rovka, dsanders, t.p.northover, efriedma, apazos

Reviewed By: arsenm

Subscribers: wdng, kristof.beyls, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D73605