[clang] [Clang] Allow -Wcast-function-type for same-width pointer-integer conversions (PR #178390)

[Jessica Clarke via cfe-commits]

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@@ -1145,6 +1145,17 @@ static bool argTypeIsABIEquivalent(QualType SrcType, QualType DestType,
         Context.getTypeSizeInChars(DestType))
       return true;
 
+  // Allow pointer-to-integral and integral-to-pointer conversions if sizes
+  // match. On platforms where pointers and certain integer types (like
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jrtc27 wrote:

(though only for the return value; arguments are always passed on the stack)

https://github.com/llvm/llvm-project/pull/178390