[LLVMdev] [PATCH] Support asm comment output

David Greene dag at cray.com
Tue Jul 14 15:10:02 PDT 2009

On Tuesday 14 July 2009 15:35, David Greene wrote:
> On Monday 13 July 2009 15:58, David Greene wrote:
> > Again, after answering the FI stack slot question, the IR-level
> > instruction information is the only thing we can't do through asmprinter.
> >  I'm open to other ways of capturing the information that don't require
> > comments in MachineInstrs.  But the information has to be stored
> > somewhere.
> Ugh.  I just found another case I don't think we can synthesize in
> asmprinter. We mark rematerialized instructions as well so our performance
> guys don't come and ask us why we didn't hoist saomething out of a loop. 
> :)

Here's another question.  If we mark StackObjects as spill slots, isn't it
possible that stack slot coloring could come along and assign non-spill/reload
memory objects to the same slot?  If so, it would appear we really do need
a flag on MachineInstr to notate all spills and reloads.


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