[LLVMdev] getScalarMap

Ganesh Bikshandi bikshand at students.uiuc.edu
Wed Nov 20 11:34:01 PST 2002


Chris,

We tried that too...but still it returns an empty map.

We also saw that Scalar Type has been removed from the DSNode types. Why
is that?

Thanks,
Ganesh
On Wed, 20 Nov 2002, Chris Lattner wrote:

> > 	......
> > 	DSGraph* DSG = getAnalysis<BUDataStructures>().getDSGraph( F );
> > 	std::map< Value*, DSNodeHandle> scalarmap = DSG->getScalarMap();
> > 	......
> >
> > The scalarmap is always empty. I printed the size of the map which came
> > out to be zero always. But the getNodeForValue works correctly for the
> > same DSG, which means that the scalarmap cannot be empty. But we always
> > have an empty scalarmap being returned.
>
> Try capturing a reference to the map instead of copying it:
>
> std::map<Value*, DSNodeHandle> &scalarmap = DSG->getScalarMap();
>
> -Chris
>
>
> > On Wed, 20 Nov 2002, Chris Lattner wrote:
> >
> > > > I tried to used the getScalarMap function of the DSGraph to get the nodes
> > > > that the scalars point to in a function. But the getScalarMap returns a
> > > > null map always. Is there any problem in the getScalarMap function or is
> > > > there any "protocol" to be followed while using the function?
> > >
> > > DSGraph::getScalarMap returns a reference to the map, so this cannot be
> > > null.  Do you mean that all of the "entries" in the map are null?  If so,
> > > remember that DSGraphs are built in the context of some function (as
> > > indicated by hasFunction/getFunction), so only scalars in that context
> > > will be in the map...
> > >
> > > -Chris
> > >
> > > --
> > > http://llvm.cs.uiuc.edu/
> > > http://www.nondot.org/~sabre/Projects/
> > >
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> > >
> >
>
> -Chris
>
> --
> http://llvm.cs.uiuc.edu/
> http://www.nondot.org/~sabre/Projects/
>
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