Subject: Re: expr.c: large structure problems
To: Castor Fu <>
From: Herman ten Brugge <>
List: tech-toolchain
Date: 10/27/1998 20:24:28
Castor Fu wrote :
> The delta introduced in revision 1.76 of egcs/gcc/expr.c causes an
> internal compiler error in cc1 built with a target of mips-dec-netbsd
> and a host of i386-unknown-freebsd on the following code fragment:
> 	struct biggy {
> 		char	buf[32800];	/* len > 16 bit offset */
> 		char    len  [10 ];
> 	};
> 	static
> 	void f ( struct biggy * s, int v)
> 	{
> 		 s->len[v] = 13 ;
> 	}
> I haven't sorted out exactly why, and apparently this problem does not
> show up in native mips environments.  Since your name is listed in
> the ChangeLog file, I would appreciate it if you could look into this.
> It appears that the code is very localized, so it's easy to workaround,
> but I'm not familiar enough with GCC to sort out the fix quickly myself.
> 	Regards,
> 	Castor Fu


I debugged the code and found the problem in the mips.h file. If I compile
the program with '-mdebuga bug.c' it works fine. It seems the macro
GO_IF_LEGITIMATE_ADDRESS is not correct. I don't know how to fix this
because I don't know how the mips works. Compiling with -O, -O2, -O3 also
did fix this problem.


Herman ten Brugge			Email: