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Re: RFC: add inheritance support to nonoverlapping_component_refs_p
On Wed, May 29, 2002 at 09:36:46PM -0700, Dan Nicolaescu wrote:
> > > I have a fix (that I am still testing) for the last one, it adds
> > >
> > > declx = TREE_OPERAND (x, 0);
> > > decly = TREE_OPERAND (y, 0);
> > > if (declx && decly && DECL_P (declx) && DECL_P (decly)
> > > && (TREE_CODE (declx) == PARM_DECL)
> > > && (TREE_CODE (decly) == PARM_DECL)
> > > && declx != decly)
> > > return 1;
> > >
> > > to the beginning of nonoverlapping_component_refs_p
> >
> > This is the wrong place to test this.
>
> Is nonoverlapping_memrefs_p better?
Yes.
> > If they're really passed by value, yes. But some ABIs pass
> > by invisible reference.
>
> Is there a way to test for that?
Inside the compiler? Yes. FUNCTION_ARG_PASS_BY_REFERENCE.
Outside the compiler? No.
r~