[libc-commits] [libc] [libc] inline fast path of callonce (PR #96226)

[Nick Desaulniers via libc-commits]

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@@ -9,13 +9,32 @@
 #ifndef LLVM_LIBC_SRC___SUPPORT_THREADS_CALLONCE_H
 #define LLVM_LIBC_SRC___SUPPORT_THREADS_CALLONCE_H
 
+#include "src/__support/macros/optimization.h" // For LIBC_LIKELY
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nickdesaulniers wrote:

```suggestion
#include "src/__support/macros/optimization.h" // LIBC_LIKELY
```

https://github.com/llvm/llvm-project/pull/96226