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Re: [PATCH] Missing simplifications in simplify_plus_minus

From: Paolo Bonzini <paolo dot bonzini at lu dot unisi dot ch>
To: GCC Patches <gcc-patches at gcc dot gnu dot org>, Andreas Krebbel <krebbel1 at de dot ibm dot com>, Roger Sayle <roger at eyesopen dot com>
Date: Sat, 11 Feb 2006 08:52:56 +0100
Subject: Re: [PATCH] Missing simplifications in simplify_plus_minus
References: <20060210113908.GA3439@de.ibm.com> <Pine.LNX.4.44.0602100653330.28186-100000@www.eyesopen.com>

It's early, and I haven't given the mechanics much thought, so I
can't immediately see a solution/implementation, but the above
comments should explain what the underlying problem is.

I'm thinking about using insertion sort in the initial loop. This would allow more canonicalization and ultimately should reenable the lost optimization.

Paolo

Follow-Ups:
- Re: [PATCH] Missing simplifications in simplify_plus_minus
  - From: Roger Sayle

References:
- [PATCH] Missing simplifications in simplify_plus_minus
  - From: Andreas Krebbel
- Re: [PATCH] Missing simplifications in simplify_plus_minus
  - From: Roger Sayle

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