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Re: SIMPLE NOT expressions

From: Paul Brook <paul at nowt dot org>
To: Steven Bosscher <s dot bosscher at student dot tudelft dot nl>,Daniel Berlin <dberlin at dberlin dot org>
Cc: Diego Novillo <dnovillo at redhat dot com>,gcc at gcc dot gnu dot org
Date: Fri, 19 Jul 2002 00:53:00 +0100
Subject: Re: SIMPLE NOT expressions
References: <Pine.LNX.4.44.0207181635040.24156-100000@dberlin.org> <1027025148.737.71.camel@steven>

> > This code should always replace a TRUTH_NOT_EXPR with an EQ_EXPR.
> >
> > So why do you still end up with them?
>
> My mistake. Before I wrote this code, I looked at tree-simple.c:
>
>       unop
>
>               : '+'
>               :
>               | '-'
>               | '!'
>               | '~'
>
> But these are bitwise unops, so we're actually generating non-SIMPLE
> code. Oops!

I dodn't think '!' was a bitwise op.  I thought it was just shorthand for '0 
!='. Maybe we should remove it from the grammar.  If not, how is '!' 
represented?

> I'll fix it, thanks!
>
> Greetz
> Steven

References:
- Re: SIMPLE NOT expressions
  - From: Daniel Berlin
- Re: SIMPLE NOT expressions
  - From: Steven Bosscher

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