[LLVMdev] Function aliases in CallGraph

[Stephen Schiffli]

That works perfect, thanks!

-Stephen

On Thu, Oct 11, 2012 at 4:02 PM, Eli Friedman <eli.friedman at gmail.com>wrote:

> On Thu, Oct 11, 2012 at 3:56 PM, Stephen Schiffli <sschiffli at gmail.com>
> wrote:
> > Hello, I have a simple program using aliases to functions, and it seems
> that
> > the CallGraph doesn't follow these aliases.  Here is the example:
> >
> > @alias = alias void ()* @realfunc
> >
> > define void @realfunc() {
> > entry:
> >   ret void
> > }
> >
> > define i32 @main() {
> > entry:
> >   call void @alias()
> >   ret i32 0
> > }
> >
> > ******* Output of the CallGraph *******
> >
> > Call graph node <<null function>><<0xbe64c0>>  #uses=0
> >   CS<0x0> calls function 'realfunc'
> >   CS<0x0> calls function 'realfunc'
> >   CS<0x0> calls function 'main'
> >
> > Call graph node for function: 'realfunc'<<0xbe6880>>  #uses=2
> >
> > Call graph node for function: 'main'<<0xbe6d80>>  #uses=1
> >   CS<0xbdfe7c> calls external node
> >
> > Is there a reason the CallGraph doesn't try to see through aliases?  I
> would
> > like this capability, but was wondering if it is generally safe to do.
>
> CallGraph is designed to be as simple as possible.  GlobalOpt will
> perform the optimization in question.
>
> -Eli
>
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