IPA merge: cgraph_add_function improvement

[Andrew Pinski]

> This causes a bootstrap failure on powerpc-aix and maybe other targets which don't
> have support for the init section.
> 
> A reduced testcase is:
> static void f(void) __attribute__((constructor));
> static void f(void) {}
> 
> 
> I tested this with a cross compiler to powerpc-aix5.3.
> 
> The ICE we get is:
> t.c:2: internal compiler error: in cgraph_expand_all_functions, at cgraphunit.c:1220
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <URL:http://gcc.gnu.org/bugs.html> for instructions.

Here is the fix I came up with while on the plane.
David,
Could you test it for me on powerpc-aix?

Thanks,
Andrew Pinski

ChangeLog:

	* c-decl.c (c_write_global_declarations): Call
	cgraph_process_new_functions before calling cgraph_optimize.
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