Function attributes

Function attributes

[patriciak784-gccmainling]

I want to declear a function as 
__declspec(dllexport) void my_HeapDestroy(HANDLE
hHeap) __attribute__ ((fastcall));

(which works without getting an error).
Now I need to write the function itself. I started
with
void my_HeapDestroy(HANDLE hHeap) but MinGW's GCC
3.4.2 complains about a function redefinition. What do
I have to write instead of void my_HeapDestroy(HANDLE
hHeap)?




		
___________________________________________________________ 
Was denken Sie über E-Mail? Wir hören auf Ihre Meinung: http://surveylink.yahoo.com/wix/p0379378.aspx

Re: function attributes

[Ian Lance Taylor]

On Fri, Oct 11, 2013 at 2:48 AM, Nagaraju Mekala <gnuuser.raj@gmail.com> wrote:
>
>   My question is how to find the attributes of a function which we are
> going to call
>
>   Problem:
>
>    Generally while calling a function we use branch instruction
>
>    ex: br r5,<offset>
>
>   But when we have a function with "super" attribute then I need to
> call the function with different branch instruction
>
>   ex: bk r5,<offset>
>
>
> In the prologue of the function I was able to get the attribute
> details using below code
>
> super_table_handler_function_p (tree func)
> {
>   tree a;
>   if (TREE_CODE (func) != FUNCTION_DECL)
>     return 0;
>   a = lookup_attribute ("super", DECL_ATTRIBUTES (func));
>   return a != NULL_TREE;
> }
>
>
> How to get the information of function attributes even before entering
> to prologue or during function call itself??


Please never send e-mail to both gcc-help@gcc.gnu.org and
gcc@gcc.gnu.org.  Thanks.  This message could have been sent to either
list, but not both.

To answer your question: look at how the rs6000 port handles the
longcall attribute.

Ian

function attributes

[Nagaraju Mekala]

Hi,

  I am working on GCC-4.6.4 version ported to a embedded target which
is similar to frv.

  My question is how to find the attributes of a function which we are
going to call

  Problem:

   Generally while calling a function we use branch instruction

   ex: br r5,<offset>

  But when we have a function with "super" attribute then I need to
call the function with different branch instruction

  ex: bk r5,<offset>


In the prologue of the function I was able to get the attribute
details using below code

super_table_handler_function_p (tree func)
{
  tree a;
  if (TREE_CODE (func) != FUNCTION_DECL)
    return 0;
  a = lookup_attribute ("super", DECL_ATTRIBUTES (func));
  return a != NULL_TREE;
}


How to get the information of function attributes even before entering
to prologue or during function call itself??

Thanks,
Nag