linux-kernel - Re: [PATCH 16/16] fix handling of integer constant expressions

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Message-ID: <20070627145910.GU21478@ftp.linux.org.uk>
Date:	Wed, 27 Jun 2007 15:59:10 +0100
From:	Al Viro <viro@....linux.org.uk>
To:	Josh Triplett <josht@...ux.vnet.ibm.com>
Cc:	Neil Booth <neil@...kokuya.co.uk>,
	Josh Triplett <josh@...edesktop.org>,
	Segher Boessenkool <segher@...nel.crashing.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-sparse@...r.kernel.org
Subject: Re: [PATCH 16/16] fix handling of integer constant expressions

On Wed, Jun 27, 2007 at 07:50:18AM -0700, Josh Triplett wrote:
> On Wed, 2007-06-27 at 14:18 +0100, Al Viro wrote:
> > --- a/expand.c
> > +++ b/expand.c
> [...]
> > @@ -488,12 +490,15 @@ static int expand_conditional(struct expression *expr)
> > 
> >  	cond_cost = expand_expression(cond);
> >  	if (cond->type == EXPR_VALUE) {
> > +		unsigned flags = expr->flags;
> >  		if (!cond->value)
> >  			true = false;
> >  		if (!true)
> >  			true = cond;
> > +		cost = expand_expression(*true);
> >  		*expr = *true;
> > -		return expand_expression(expr);
> > +		expr->flags = flags;
> > +		return cost;
> 
> This passes an incorrect type to expand_expression; it wants a struct
> expression *, but *true has type struct expression; did you want to pass
> true rather than *true?

Gah...  Yes, of course.  Sorry about that...
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