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Re: PATCH: optimization/5844: Bad code generated for -O2 -mcpu=i586

From: Richard Henderson <rth at redhat dot com>
To: "H . J . Lu" <hjl at lucon dot org>
Cc: gcc-bugs at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org
Date: Wed, 6 Mar 2002 13:45:07 -0800
Subject: Re: PATCH: optimization/5844: Bad code generated for -O2 -mcpu=i586
References: <20020305182642.A6139@lucon.org> <20020306000218.A11157@lucon.org> <20020306095302.A19867@lucon.org>

On Wed, Mar 06, 2002 at 09:53:02AM -0800, H . J . Lu wrote:
> How about this patch?

Your line of attack is incorrect.  The problem is not with
copyprop_hardreg_forward_1 at all.  The problem is shared rtl.

The mem in insn 83 is shared with the mem in insn 85.  This
is the bug.


r~

Follow-Ups:
- Re: PATCH: optimization/5844: Bad code generated for -O2 -mcpu=i586
  - From: Richard Henderson

References:
- Re: optimization/5844: Bad code generated for -O2 -mcpu=i586
  - From: H . J . Lu
- Re: optimization/5844: Bad code generated for -O2 -mcpu=i586
  - From: H . J . Lu
- PATCH: optimization/5844: Bad code generated for -O2 -mcpu=i586
  - From: H . J . Lu

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