[all-commits] [llvm/llvm-project] a5a4a4: [AArch64] Fix data race on RegisterBank initializa...
huihzhang via All-commits
all-commits at lists.llvm.org
Wed Jan 29 10:13:17 PST 2020
Branch: refs/heads/master
Home: https://github.com/llvm/llvm-project
Commit: a5a4a47d691459afffc552bd3be7abfc86a49793
https://github.com/llvm/llvm-project/commit/a5a4a47d691459afffc552bd3be7abfc86a49793
Author: Huihui Zhang <huihuiz at quicinc.com>
Date: 2020-01-29 (Wed, 29 Jan 2020)
Changed paths:
M llvm/lib/Target/AArch64/AArch64RegisterBankInfo.cpp
Log Message:
-----------
[AArch64] Fix data race on RegisterBank initialization.
Summary:
The initialization of RegisterBank needs to be done only once. The
logic of AlreadyInit has a data race, use llvm::call_once instead.
This issue was identified through thread sanitizer.
Reviewers: efriedma, apazos, qcolombet, dsanders
Reviewed By: efriedma
Subscribers: arsenm, kristof.beyls, hiraditya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D73587
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