[clang] [clang][AArch64] Don't round parameters to multiples of 8-byte (PR #215264)

[via cfe-commits]

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@@ -504,6 +504,10 @@ ABIArgInfo AArch64ABIInfo::classifyArgumentType(QualType Ty, bool IsVariadicFn,
           std::max(getContext().getTypeAlign(Ty),
                    (unsigned)getTarget().getPointerWidth(LangAS::Default));
     }
+    if (Size < 64 && getDataLayout().isLittleEndian())
+      return ABIArgInfo::getDirect(
+          llvm::IntegerType::get(getVMContext(), Size));
+
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eleviant wrote:

Addressed. Looks like even on Darwin, we don't need to zext/sext arguments with size >= 32 bits, do we?

https://github.com/llvm/llvm-project/pull/215264