This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

Re: [PATCH] ARM: exclude fixed_regs for stack-alignment save/restore

From: Roland McGrath <mcgrathr at google dot com>
To: Mike Stump <mikestump at comcast dot net>
Cc: gcc-patches at gcc dot gnu dot org
Date: Thu, 14 Jun 2012 13:21:44 -0700
Subject: Re: [PATCH] ARM: exclude fixed_regs for stack-alignment save/restore
References: <x57jboklg6f9.fsf@frobland.mtv.corp.google.com> <AC3806B1-20EB-4444-A7BC-D74EBF470D57@comcast.net>

On Thu, Jun 14, 2012 at 1:13 PM, Mike Stump <mikestump@comcast.net> wrote:
> On Jun 14, 2012, at 10:16 AM, Roland McGrath wrote:
>> But if e.g. I use -ffixed-r9 then I think it's a reasonable expectation
>> that no code is generated that touches r9 in any way, shape, or form.
>
> Also, I can't help but wonder if global_regs is respected.

It's clearly not.  Making the added condition !fixed_regs[i] && !global_regs[i]
seems sensible to me.


Thanks,
Roland

Follow-Ups:
- Re: [PATCH] ARM: exclude fixed_regs for stack-alignment save/restore
  - From: Roland McGrath
- Re: [PATCH] ARM: exclude fixed_regs for stack-alignment save/restore
  - From: Richard Sandiford

References:
- [PATCH] ARM: exclude fixed_regs for stack-alignment save/restore
  - From: Roland McGrath
- Re: [PATCH] ARM: exclude fixed_regs for stack-alignment save/restore
  - From: Mike Stump

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]