virtual memory exhausted for -O3 in gcc-4.1.0

[Brian Gough <bjg at gnu dot org>]

Hello, 

I have a 240k C source file which takes huge amounts of memory and
runtime during compilation with -O3 on gcc-4.1.0.

Peak memory usage is over 200MB and it requires 15 minutes cpu on a
2.6GHz Celeron.  

Memory consumption with -O2 is also pretty large, at about 90MB.

The C source is just a series of function calls.  The file is part of
the test suite for GSL (GNU Scientific Library).

-- 
best regards,

Brian Gough
(GSL Maintainer)
http://www.gnu.org/software/gsl/


----------------------------------------------------------------------
$ gcc -v -O3 test_trmm.i
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: /home/bjg/ftp/gcc-4.1.0/configure --enable-languages=c
Thread model: posix
gcc version 4.1.0
 /usr/local/libexec/gcc/i686-pc-linux-gnu/4.1.0/cc1 -fpreprocessed test_trmm.i -quiet -dumpbase test_trmm.i -mtune=pentiumpro -auxbase test_trmm -O3 -version -o /tmp/cchfvhDf.s
GNU C version 4.1.0 (i686-pc-linux-gnu)
	compiled by GNU C version 4.1.0.
GGC heuristics: --param ggc-min-expand=34 --param ggc-min-heapsize=34133
Compiler executable checksum: cfb1b2bd54706108adb6f3fd717f24e5
virtual memory exhausted: Cannot allocate memory

Attachment: test_trmm.i
Description: test_trmm.i