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[Lanai] Be super conservative about atomics

Authored by reames on Feb 25 2019, 9:36 AM.

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[Lanai] Be super conservative about atomics

As requested during review of D57601 https://reviews.llvm.org/D57601, be equally conservative for atomic MMOs as for volatile MMOs in all in tree backends. At the moment, all atomic MMOs are also volatile, but I'm about to change that.

Reviewed as part of https://reviews.llvm.org/D58490, with other backends still pending review.

llvm-svn: 354800

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Committed
reamesFeb 25 2019, 9:36 AM
Parents
rG2a4c1f3e5b28: [lldb-mi] Check raw pointers before passing them to std::string ctor/assignment
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