[cfe-commits] r81251 - in /cfe/trunk: include/clang/AST/APValue.h lib/AST/APValue.cpp

[Mike Stump]

On Sep 8, 2009, at 12:57 PM, Douglas Gregor wrote:
> Make sure to access APValue's data via a char array (rather than
> through an array of void*), so that we don't run afoul of the
> strict-aliasing rules in C++ 3.10p15.

> Unfortunately, GCC 4.4 still complains about this code.

> -    return *(APSInt*)(void*)Data;
> +    return *(APSInt*)(char*)Data;

This doesn't match your description.  If you think this access is  
through a char to ensure this conforms to the standard...  I'd be  
happy to give you the aliasing rules class...  This is an access  
through a type of APSInt, which is unrelated to char.

gcc still would give an error, as this code is still runs afoul of the  
rules (I bet).

   p = new APSInt newobj;
   memcpy (p, Data, sizeof(newobj);

is an access through type char.

?