[clang] [Clang] Suppress mismatch warning for same-size pointer/integer casts (PR #203955)

[Aaron Ballman via cfe-commits]

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@@ -1057,6 +1057,12 @@ class TargetInfo : public TransferrableTargetInfo,
   /// idea to avoid optimizing based on that undef behavior.
   virtual bool isCLZForZeroUndef() const { return true; }
 
+  /// Returns whether pointers and integers of the same size are considered
+  /// ABI-compatible on this target. Defaults to true; targets with separate
+  /// register files for pointers and integers (e.g., m68k) should override
+  /// to return false.
+  virtual bool arePointersAndIntegersABICompatible() const { return true; }
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AaronBallman wrote:

Have you done an analysis of the targets Clang supports to determine that only m68k is problematic?

https://github.com/llvm/llvm-project/pull/203955