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

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Message-ID: <20070627125958.GA16758@daikokuya.co.uk>
Date:	Wed, 27 Jun 2007 21:59:58 +0900
From:	Neil Booth <neil@...kokuya.co.uk>
To:	Al Viro <viro@....linux.org.uk>
Cc:	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

Al Viro wrote:-

> If you want to test ICE recognition, right now only the following places
> are checking for it:
> 	* bitfield width
> 	* __attribute__((aligned(<number>)))
> 	* __attribute__((address_space(<number>)))
> 	* [<index>] in designators within initializer list
> 	* [<index> ... <index>] - ditto, gccism
> 
> That's it.  We can use it elsewhere too, but that's a separate bunch of
> patches (trivial to do now).

Bah.  You don't escape that easily :)

extern int a;
struct b { unsigned int b1:(1,2); };
struct c { unsigned int c1: 1 ? 2: a++; };

are both invalid yet undiagnosed.

Neil.
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