[all-commits] [llvm/llvm-project] 909a85: [CGAtomic] Mark atomic libcall functions `nounwind`

[Gui Andrade via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 909a851dbffeb3637c19268e12e10fdf3dae2add
      https://github.com/llvm/llvm-project/commit/909a851dbffeb3637c19268e12e10fdf3dae2add
  Author: Gui Andrade <guiand at google.com>
  Date:   2020-08-14 (Fri, 14 Aug 2020)

  Changed paths:
    M clang/lib/CodeGen/CGAtomic.cpp
    M clang/test/CodeGen/atomic_ops.c

  Log Message:
  -----------
  [CGAtomic] Mark atomic libcall functions `nounwind`

These functions won't ever unwind. This is useful for MemorySanitizer
as it simplifies handling __atomic_load in particular.

Differential Revision: https://reviews.llvm.org/D85573