[PATCH] D123642: [clang codegen] Assume arguments of __atomic_* are aligned.

[Eli Friedman via Phabricator via cfe-commits]

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This seems weird, but it's necessary to match gcc, and avoid unnecessary calls to libatomic from libstdc++ <atomic>.

Fixes https://github.com/llvm/llvm-project/issues/54790 .


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D123642

Files:
  clang/lib/CodeGen/CGAtomic.cpp
  clang/test/CodeGen/atomic-ops.c
  clang/test/CodeGen/atomics-sema-alignment.c

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