[llvm] [BOLT] Add support for safe-icf (PR #116275)

[Davide Italiano via llvm-commits]

================
@@ -817,6 +820,12 @@ class BinaryFunction {
     return nullptr;
   }
 
+  /// Indicates if the function is safe to fold.
+  bool isSafeToICF() const { return IsSafeToICF; }
+
+  /// Sets the function is not safe to fold.
+  void setUnsetToICF() { IsSafeToICF = false; }
----------------
dcci wrote:

`setUnset` ?

https://github.com/llvm/llvm-project/pull/116275