'parameter': formal parameter with __declspec(align('#')) won't be aligned

The align __declspec modifier is not permitted on function parameters. Function parameter alignment is controlled by the calling convention used. For more information, see Calling Conventions.

The following sample generates C2719 and shows how to fix it:

// C2719.cpp
void func(int __declspec(align(32)) i);   // C2719
// try the following line instead
// void func(int i);