[clang] [compiler-rt] [llvm] [clang] builtins for atomicrmw fminmax/_num (PR #187139)

[Eli Friedman via cfe-commits]

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@@ -0,0 +1,404 @@
+// RUN: %clang %s -O2 -o %t && %t
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efriedma-quic wrote:

I'm fine leaving it out, sure.

https://github.com/llvm/llvm-project/pull/187139