Tree

[konica sarker]

On Mon, Jul 4, 2011 at 5:44 PM, Philip Herron <redbrain@gcc.gnu.org> wrote:
> On 4 July 2011 16:30, Philip Herron <redbrain@gcc.gnu.org> wrote:
>> On 4 July 2011 16:13, Jonathan Wakely <jwakely.gcc@gmail.com> wrote:
>>> On 4 July 2011 15:28, konica sarker wrote:
>>>> "A tree is a pointer type, but the object to which it points may be of
>>>> a variety of types"
>>>>
>>>> suppose i have a tree t;
>>>> can you help me, how to identify the object type of the tree?
>>>
>>> From http://gcc.gnu.org/onlinedocs/gccint/Tree-overview.html
>>>
>>> "You can tell what kind of node a particular tree is by using the
>>> TREE_CODE macro."
>>>
>>>> what does the function TREE_TYPE() do?
>>>
>>> From http://gcc.gnu.org/onlinedocs/gccint/Macros-and-Functions.html
>>>
>>> "Many trees store the type of an expression or declaration in this field."
>>>
>>> And from gcc/tree.h:
>>>
>>> /* In all nodes that are expressions, this is the data type of the expression.
>>>   In POINTER_TYPE nodes, this is the type that the pointer points to.
>>>   In ARRAY_TYPE nodes, this is the type of the elements.
>>>   In VECTOR_TYPE nodes, this is the type of the elements.  */
>>> #define TREE_TYPE(NODE) __extension__ \
>>> (*({__typeof (NODE) const __t = CONTAINS_STRUCT_CHECK (NODE, TS_TYPED); \
>>>    &__t->typed.type; }))
>>>
>>
>> The way i tend to think of tree's is just DAG's,
>> http://gcc.gnu.org/wiki/GenericAPI
>> I started documenting more there, but i will continue to add to that
>> as its no where near complete.
>>
>
> Also: debug_tree (tree), is a useful function!
>

Thanks, another question is it possible to find the address space of a
node of a tree?