================
@@ -1302,6 +1302,7 @@ ItaniumRecordLayoutBuilder::LayoutBase(const
BaseSubobjectInfo *Base) {
setSize(std::max(getSize(), Offset + Layout.getSize()));
// Remember max struct/class alignment.
+ UnadjustedAlignment = std::max(UnadjustedAlignment, PreferredBaseAlign);
----------------
hvdijk wrote:
Tested that this doesn't affect Darwin and Windows, but for Windows, that
surprises me. Clang matches MSVC for AArch64 in *not* following AAPCS64 on
Windows, despite the fact that Microsoft's [Overview of ARM64 ABI conventions >
Parameter
Passing](https://learn.microsoft.com/en-us/cpp/build/arm64-windows-abi-conventions?view=msvc-170#parameter-passing)
says "For non-variadic functions, the Windows ABI follows the rules specified
by ARM for parameter passing. These rules are excerpted directly from the
Procedure Call Standard for the AArch64 Architecture: [...]"
https://github.com/llvm/llvm-project/pull/135564
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