This is the mail archive of the
gcc-help@gcc.gnu.org
mailing list for the GCC project.
Re: array size limitation problem
- From: Toon Moene <toon at moene dot indiv dot nluug dot nl>
- To: ignat <ignat at lasia dot chemistry dot mu dot edu>
- Cc: GNU project <gcc-help at gcc dot gnu dot org>
- Date: Wed, 05 Dec 2001 00:19:51 +0100
- Subject: Re: array size limitation problem
- Organization: Moene Computational Physics, Maartensdijk, The Netherlands
- References: <3C0BF302.DBB72138@lasia.chemistry.mu.edu>
ignat wrote:
> Using g77 (GNU project Fortran Compiler, v0.5.24) I have encountered a
> problem of array size limitation.
> I found out that size of an array is limited to 2^27 -1 = 134 217 728,
> while integer itself can be 2^31 -1 = 2 147 483 647.
> I actually need an array with 600 000 000 numbers. What can I do?
I fixed this for the 3.1 release, basically by removing a check that I
proved unnecessarily strict.
So you could try out a recent snapshot of gcc/g77 (see our home page at
http://gcc.gnu.org, entry "Snapshots" in the left column). However, one
shouldn't use snapshot compilers for production work.
Another option is to apply the following patch to a recent release (see
entry "Releases" in the left column) and build that compiler.
Hope this helps,
--
Toon Moene - mailto:toon@moene.indiv.nluug.nl - phoneto: +31 346 214290
Saturnushof 14, 3738 XG Maartensdijk, The Netherlands
Maintainer, GNU Fortran 77: http://gcc.gnu.org/onlinedocs/g77_news.html
Join GNU Fortran 95: http://g95.sourceforge.net/ (under construction)
2001-10-22 Toon Moene <toon@moene.indiv.nluug.nl>
* com.c (ffecom_check_size_overflow_): Only check for TREE_OVERFLOW.
*** com.c.orig Fri Oct 19 14:59:44 2001
--- com.c Sun Oct 21 14:17:15 2001
*************** ffecom_check_size_overflow_ (ffesymbol s
*** 2267,2272 ****
if ((tree_int_cst_sgn (TYPE_SIZE (type)) < 0)
! || (!dummy && (((TREE_INT_CST_HIGH (TYPE_SIZE (type)) != 0))
! || TREE_OVERFLOW (TYPE_SIZE (type)))))
{
ffebad_start (FFEBAD_ARRAY_LARGE);
--- 2267,2271 ----
if ((tree_int_cst_sgn (TYPE_SIZE (type)) < 0)
! || (!dummy && TREE_OVERFLOW (TYPE_SIZE (type))))
{
ffebad_start (FFEBAD_ARRAY_LARGE);