[llvm] r175576 - [ms-inline asm] Force the use of a base pointer if the MachineFunction includes

Chad Rosier chad.rosier at gmail.com
Thu Aug 8 07:39:34 PDT 2013


On Wed, Aug 7, 2013 at 8:38 PM, Jakob Stoklund Olesen <stoklund at 2pi.dk>wrote:

> On Aug 7, 2013, at 5:17 PM, Reid Kleckner <rnk at google.com> wrote:
>
> > Wouldn't it be much better to use ebp for the base pointer and put the
> pre-alignment SP into a local that could be spilled or register allocated
> as necessary?  Is that just a matter of work?
>
> I think stack unwinders would expect to find the frame pointer in %ebp.
>
> /jakob


Unfortunately, I can't think of a simple solution here.  How does gcc
handle this case?  IIRC, gcc was the original motivating factor for forcing
the use of the FP?

 Chad
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