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Re: Share clobbers of hard registers...

From: Jim Wilson <wilson at specifixinc dot com>
To: Jan Hubicka <hubicka at ucw dot cz>
Cc: Josef Zlomek <zlomekj at suse dot cz>, Jan Hubicka <jh at suse dot cz>, gcc-patches at gcc dot gnu dot org
Date: Fri, 06 Feb 2004 00:56:27 -0800
Subject: Re: Share clobbers of hard registers...
References: <20040119204859.GX7878@kam.mff.cuni.cz> <20040205101811.GA2838@artax.karlin.mff.cuni.cz> <20040205103804.GF10714@atrey.karlin.mff.cuni.cz> <20040205105319.GB32482@artax.karlin.mff.cuni.cz> <20040205105613.GA806@artax.karlin.mff.cuni.cz> <20040205111345.GH10714@atrey.karlin.mff.cuni.cz> <20040205112643.GI10714@atrey.karlin.mff.cuni.cz>

Jan Hubicka wrote:

* reg-stack.c (subst_stack_regs): Unshare clobbers before substitution.

OK.

I see that copy_rtx_if_shared_1 in emit-rtl.c handles clobbers of a hard reg specially, it allows them to be shared. Thus if reg-stack wants to modify a clobber of a hard-reg, it must unshare it first. -- Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com

Follow-Ups:
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References:
- Re: Share clobbers of hard registers...
  - From: Josef Zlomek
- Re: Share clobbers of hard registers...
  - From: Jan Hubicka
- Re: Share clobbers of hard registers...
  - From: Josef Zlomek
- Re: Share clobbers of hard registers...
  - From: Josef Zlomek
- Re: Share clobbers of hard registers...
  - From: Jan Hubicka
- Re: Share clobbers of hard registers...
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