[PATCH] D61052: [compiler-rt][builtins] Implement some fetch-and-x operations for Cortex-M

[Ayke via Phabricator via llvm-commits]

aykevl abandoned this revision.
aykevl added a comment.

Ok, based on the above comments I believe that this is a bug in LLVM and not a missing feature in compiler-rt. LLVM should generate `__atomic_*` calls instead of `__sync_` calls and it shouldn't generate those for Cortex-M3 and up when doing 32-bit atomics because it should be able to emit such instructions inline.

Unfortunately, I know very little about the backend to fix this myself.


Repository:
  rCRT Compiler Runtime

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  https://reviews.llvm.org/D61052/new/

https://reviews.llvm.org/D61052