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Re: RA best is NO_REGS

From: "Paulo J. Matos" <paulo at matos-sorge dot com>
To: gcc at gcc dot gnu dot org
Date: Fri, 15 Jun 2012 15:03:56 +0100
Subject: Re: RA best is NO_REGS
References: <jrcmhe$mln$1@dough.gmane.org>

The output is still the same but the spill is fixed in 4.7.1.

On 14/06/12 13:47, Paulo J. Matos wrote:

Hi,

I found a problem with my port where IRA generates a spill error. After
looking at the logs I get this kind of output for the best class for the
pseudo regs:

Pass 0 for finding pseudo/allocno costs

a2 (r30,l0) best NO_REGS, allocno NO_REGS
a3 (r29,l0) best NO_REGS, allocno NO_REGS
a4 (r28,l0) best NO_REGS, allocno NO_REGS
a5 (r27,l0) best NO_REGS, allocno NO_REGS
a0 (r26,l0) best XL_REG, allocno XL_REG
a1 (r20,l0) best AL_REG, allocno AL_REG

This doesn't look good. Why NO_REGS?

Cheers,

--
PMatos

References:
- RA best is NO_REGS
  - From: Paulo J. Matos

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