Re: Obtaining the arguments to a function pointer

[Ian Lance Taylor <iant at google dot com>]

Matt Davis <mattdavis9@gmail.com> writes:

> I am trying to look at the arguments that are passed to a function
> pointer.  I have an SSA_NAME which is for a pointer-type to a
> function-type.  I want to obtain the arguments being passed to the
> function pointer, but after looking all over the SSA_NAME node and its
> corresponding VAR_DECL I cannot seem to find the arguments stashed
> anywhere.  I know this is somewhat of a special case.  Typically, if I
> had a fndecl it would be easy, but all I know in my case is the
> function type.

A function pointer doesn't have any associated arguments, at least not
as I use that word.  Are you looking for the argument types?  Because
there are no argument values.

The argument types can be found from the type of the SSA_NAME, which
should be a FUNCTION_TYPE.  TYPE_ARG_TYPES of the FUNCTION_TYPE will be
the argument types.

Ian