[PATCH] D122377: [PowerPC][Linux] Support 16-byte lock free atomics on pwr8 and up

[Hubert Tong via Phabricator via cfe-commits]

hubert.reinterpretcast added inline comments.


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Comment at: clang/test/CodeGen/PowerPC/atomic-alignment.c:45
+// PPC64: @q = global %struct.Q zeroinitializer, align 16{{$}}
+// AIX64: @q = global %struct.Q zeroinitializer, align 1{{$}}
 _Atomic(Q) q; // expected-no-diagnostics
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Although it is a change that affects layout compatibility with the short history of 16-byte atomic types compiled with LLVM-based compilers on AIX, having this 16-byte atomic type aligned also on AIX for PPC64 would be reasonable. The consequences of not doing so is that operations on some types would be lock-free only on ELF-based platforms.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D122377/new/

https://reviews.llvm.org/D122377