[llvm] [FunctionAttrs] deduce attr `cold` on functions if all CG paths call a `cold` function (PR #101298)

[Yingwei Zheng via llvm-commits]

================
@@ -1745,6 +1746,7 @@ static bool canReturn(Function &F) {
   return false;
 }
 
+
----------------
dtcxzyw wrote:

```suggestion
```

https://github.com/llvm/llvm-project/pull/101298