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Re: Split edge fails when performed on a doloop jump on x86 port

From: Jim Wilson <wilson at specifixinc dot com>
To: Dale Johannesen <dalej at apple dot com>
Cc: gcc at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org,Mostafa Hagog <MUSTAFA at il dot ibm dot com>
Date: 19 Feb 2004 13:24:59 -0800
Subject: Re: Split edge fails when performed on a doloop jump on x86 port
References: <OF341AA08C.160E5341-ONC2256E3D.005F4916-C2256E3D.00615BF8@il.ibm.com><4033C3EB.9090204@specifixinc.com> <27F81D52-6319-11D8-8240-000A95D7CD40@apple.com>

On Thu, 2004-02-19 at 12:21, Dale Johannesen wrote:
> I've hit instances of this on ppc as well.  Would it possible to check 
> for this
> during bootstrap?  I bet there are more of these bugs lurking.

validate_pattern in genrecog.c does some checks.  It could do more.

Fully general checking would get complicated, because of target
dependent predicates and target dependent constraints.  Some simple
cases like a 'm' constraint and a register_operand predicate would be
easy to check for though.
-- 
Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com

References:
- Split edge fails when performed on a doloop jump on x86 port
  - From: Mostafa Hagog
- Re: Split edge fails when performed on a doloop jump on x86 port
  - From: Jim Wilson
- Re: Split edge fails when performed on a doloop jump on x86 port
  - From: Dale Johannesen

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