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Re: testcase for hppa64 gcc bug
- To: law at redhat dot com
- Subject: Re: testcase for hppa64 gcc bug
- From: "John David Anglin" <dave at hiauly1 dot hia dot nrc dot ca>
- Date: Tue, 5 Dec 2000 23:14:59 -0500 (EST)
- Cc: alan at linuxcare dot com dot au, gcc-bugs at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org, parisc-linux at thepuffingroup dot com
> > 2000-11-07 John David Anglin <dave@hiauly1.hia.nrc.ca>
> >
> > * pa-linux64.h (ARG_POINTER_INVARIANT): Define even when the
> > arg_pointer is being eliminated.
> > (ELIMINABLE_REGS): Enable elimination of the arg_pointer.
> > (INITIAL_ELIMINATION_OFFSET): Revise offsets for arg_pointer.
> > * pa.md (mulsi3, divsi3, udivsi3, modsi3, umodsi3 and
> > canonicalize_funcptr_for_compare): Put "(reg:SI 26)" inside
> > unspec to prevent elimination.
> > (call, call_value): Always USE the arg_pointer for TARGET_64BIT.
> > Use the new addmovdi3 insn to load the arg_pointer register.
> > (addmovdi3 and mov_from_r29_si): New insn and expand which prevent
> > r29 from being eliminated in call setups and millicode returns.
> I haven't followed this discussion too closely. Is this patch still needed
> after some of the recent changes in how we compute liveness for the argument
> pointer?
I think this needs to be reexamined. Allan's ARG_POINTER_INVARIANT patch
might not be needed now.
Dave
--
J. David Anglin dave.anglin@nrc.ca
National Research Council of Canada (613) 990-0752 (FAX: 952-6605)