================
@@ -1870,6 +1870,28 @@ bool Sema::IsFunctionConversion(QualType FromType,
QualType ToType,
FromFn = QT->getAs<FunctionType>();
Changed = true;
}
+
+ // For C, when called from checkPointerTypesForAssignment,
+ // we need not to alter FromFn, or else even an innocuous cast
+ // like dropping effects will fail. In C++ however we do want to
+ // alter FromFn. TODO: Is this correct?
+ if (getLangOpts().CPlusPlus) {
+ FromFPT =
+ dyn_cast<FunctionProtoType>(FromFn); // in case FromFn changed above
----------------
Sirraide wrote:
> No, that one’s different.
Specifically, what that code is doing is it checks whether `FromFn` is a
`FunctionProtoType`, and then goes ahead and assumes that `ToFn` must be as
well if it is.
https://github.com/llvm/llvm-project/pull/84983
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