[PATCH] D71726: Let clang atomic builtins fetch add/sub support floating point types

[James Y Knight via Phabricator via cfe-commits]

jyknight added a comment.

Oh, one more note, C11 has -- and clang already supports -- `_Atomic long double x; x += 4;` via lowering to a cmpxchg loop. Now that we have an LLVM IR representation for atomicrmw fadd/fsub, clang should be lowering the _Atomic += to that, too. (Doesn't need to be in this patch, but it should be done.)


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https://reviews.llvm.org/D71726