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Re: [testcase] ia64 retaddr elimination failure
- From: Richard Henderson <rth at redhat dot com>
- To: Geoff Keating <geoffk at redhat dot com>
- Cc: gcc at gcc dot gnu dot org, jakub at redhat dot com, wilson at cygnus dot com
- Date: Tue, 22 Jan 2002 13:30:50 -0800
- Subject: Re: [testcase] ia64 retaddr elimination failure
- References: <200201222122.g0MLMfV04281@desire.geoffk.org>
On Tue, Jan 22, 2002 at 01:22:41PM -0800, Geoff Keating wrote:
> Actually, what I expected is that if the routine has no frame pointer,
> then __builtin_frame_pointer(0) should either (a) fail, or (b) return
> the stack pointer which is what the frame pointer got eliminated to,
> and which is what we're actually accessing the frame with. I think
> (b) is nicer.
I see no reason why __builtin_frame_pointer(0) doesn't just
return frame_pointer_rtx rather than the hard frame pointer.
Personally I think any mention of the hard frame pointer
before reload is dodgy at best, since we don't know if it
really exists or not.
r~