compiler internal error for the large automatic array. AMD64

compiler internal error for the large automatic array. AMD64

[Murakami Hiroshi]

Dear, GCC bugs,

This shows a sample off C source code 
that produces the gcc compiler internal error.
gcc 3.3.1 on AMD-x64 system on Mandrake Linux for AMD64.

Hiroshi Murakami <dm@tmca.ac.jp>

-----
Script started on Sun 11 Jan 2004 07:59:24 PM EST
$
$ cc -v
Reading specs from /usr/lib64/gcc-lib/amd64-mandrake-linux-gnu/3.3.1/specs
Configured with: ../configure --prefix=/usr --libdir=/usr/lib64 
--with-slibdir=/lib64 --mandir=/usr/share/man --infodir=/usr/share/info 
--enable-shared --enable-threads=posix --disable-checking --enable-long-long 
--enable-__cxa_atexit --enable-languages=c,c++,ada,f77,objc,java,pascal 
--host=amd64-mandrake-linux-gnu --with-system-zlib
Thread model: posix
gcc version 3.3.1 (Mandrake Linux 9.2 3.3.1-4mdk)
$
$
$ cc a.c
a.c: In function `main':
a.c:27: error: unrecognizable insn:
(insn/f 230 229 231 (nil) (parallel [
            (set (reg/f:DI 7 rsp)
                (plus:DI (reg/f:DI 7 rsp)
                    (const_int -2147483696 [0xffffffff7fffffd0])))
            (clobber (reg:CC 17 flags))
            (clobber (mem:BLK (scratch) [0 A8]))
        ]) -1 (nil)
    (nil))
a.c:27: internal compiler error: in insn_default_length, at insn-attrtab.c:493
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:https://qa.mandrakesoft.com/> for instructions.
$
$
$ cat a.c
//===============================================
#include <stdio.h>
#include <stdlib.h>

#define MEGA (1024UL*1024/8)
#define N 2048UL  
// if the value of N is less than 2048, no compiler internal error.
// This compiler error can be avoided if the array double a[N][MEGA] 
// is declared as static.

int main()
{
double a[N][MEGA];
long int i,j;
long int s;
	for(i=0;i<N;i++)
		for(j=0;j<MEGA;j++)
			a[i][j]=i^j;
	s=0;
	for(i=0;i<N;i++)
		for(j=0;j<MEGA;j++)
		{
			if(a[i][j]!=(i^j)) {
				fprintf(stderr,"Error a[i][j]!=i^j.\n");
				exit(2);
			}
			s+=a[i][j];
		}
	return 0;
}
//===============================================
$ exit
exit

Script done on Sun 11 Jan 2004 07:59:41 PM EST

Re: compiler internal error for the large automatic array. AMD64

[Jim Wilson]

Murakami Hiroshi wrote:
> This shows a sample off C source code 
> that produces the gcc compiler internal error.
> gcc 3.3.1 on AMD-x64 system on Mandrake Linux for AMD64.

Bug reports should be filed into our bugzilla bug database, rather than 
mailed to the gcc-bugs mailing list.  We don't track bug reports that 
are mailed to us, so they may be forgotten if not immediately answered. 
  We do track bug reports filed into bugzilla.  See
	http://gcc.gnu.org/bugs.html
-- 
Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com