[cfe-dev] split hot and cold part of a function into separate function

[陈云星 via cfe-dev]

currently, gcc support function attribute “cold”, which can hint compiler split caller function’s cold into two separate function, one is hot the other is cold.

One example is here: https://godbolt.org/z/j7sK4hd48 <https://godbolt.org/z/j7sK4hd48>

my question is Clang/llvm has such function/capability ?
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