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Re: Supporting 'MAC' instruction on gcc v4.1.1

From: Paul Brook <paul at codesourcery dot com>
To: gcc at gcc dot gnu dot org
Cc: Rahul <rah dot v dot ragh at gmail dot com>
Date: Sat, 12 May 2007 01:11:58 +0100
Subject: Re: Supporting 'MAC' instruction on gcc v4.1.1
References: <cf15b2ee0705110526t7e38b910lda4e58d375c4a9e4@mail.gmail.com>

> But for the following example
>   int a = 1;
>   int b = 2;
>   int c = 3;
>   c = c + a * b;
> the MAC pattern is not getting recognized, instead it is still using
> PLUS and MULT patterns.

Your example is bogus. This is optimized to "c = 5" well before we get to RTL.

Paul

Follow-Ups:
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References:
- Supporting 'MAC' instruction on gcc v4.1.1
  - From: Rahul

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