[clang] [CIR][NEON] Add lowering for `vnegd_s64` and `vnegh_f16` (PR #180597)

[Andrzej Warzyński via cfe-commits]

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@@ -362,6 +362,20 @@ class CIRGenBuilderTy : public cir::CIRBaseBuilderTy {
     return getConstantInt(loc, getUInt64Ty(), c);
   }
 
+  /// Create constant nullptr for pointer-to-data-member type ty.
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banach-space wrote:

Let me revert this and I will send an NFC follow-up.

https://github.com/llvm/llvm-project/pull/180597