Re: [C++ Patch / RFC] Tidy c-common.c:pointer_int_sum?

[Paolo Carlini <paolo dot carlini at oracle dot com>]

.. I analyzed a bit what is happening and this is what I see: the only 
interesting case is that of C++, where pointer_int_sum is called via 
cp_pointer_int_sum. The latter is only called by cp_build_binary_op but 
that happens for MINUS_EXPR and PLUS_EXPR as operator. In such cases 
however, only operands with POINTER_TYPE as TREE_TYPE are passed to 
cp_pointer_int_sum. AFAICS this never happens for actual pointers to 
(non-static) member function, eg, for:

struct A { void f(); };

auto p = &A::f + 1;

the TREE_TYPE of the first operand is RECORD_TYPE (the TREE_CODE is 
PTRMEM_CST).

On the other hand, for static member functions the representation uses 
as TREE_TYPE a POINTER_TYPE to FUNCTION_TYPE, which is correctly handled 
by pointer_int_sum.

Paolo.