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Re: Sharing hard registers
> From: Jan Hubicka <jh@suse.cz>
> Date: Fri, 14 Jun 2002 11:59:16 +0200
>
> Pseudo registers are always shared.
>
> I thought reload rewrites individual pseudo REG rtx expressions as it
> performs spills/reloads, and therefore each pseudo instance must be
> unique and not shared.
Hmm, it does not.. It is even documented in gccint.texi:
* Each pseudo-register has only a single `reg' object to represent
it, and therefore only a single machine mode.
Many parts of compiler rely on this fact.
Honza