[clang] [CIR] add pairwise-addition-and-widen support (PR #191845)

[via cfe-commits]

================
@@ -659,8 +656,23 @@ static mlir::Value emitCommonNeonBuiltinExpr(
   case NEON::BI__builtin_neon_vmull_v:
   case NEON::BI__builtin_neon_vpadal_v:
   case NEON::BI__builtin_neon_vpadalq_v:
+    // I'm not sure why we have two vpadal case
+    // Seems not come here forever
----------------
xiongzile wrote:

Thanks for the detailed and kind explanation. I've fixed it.

https://github.com/llvm/llvm-project/pull/191845