gcc -O2 works on this file:
gcc whetstone.cbe.c -lm -O2 -fno-strict-aliasing -fno-inline -m64
-fomit-frame-pointer
gcc -O3 exhausts memory:
gcc whetstone.cbe.c -lm -O3 -fno-strict-aliasing -fno-inline -m64
-fomit-frame-pointer
virtual memory exhausted: Cannot allocate memory
$ gcc -v
Using built-in specs.
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 4.4.3-3'
--with-bugurl=file:///usr/share/doc/gcc-4.4/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared
--enable-multiarch --enable-linker-build-id --with-system-zlib
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--with-gxx-include-dir=/usr/include/c++/4.4 --program-suffix=-4.4 --enable-nls
--enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc
--with-arch-32=i486 --with-tune=generic --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.4.3 (Debian 4.4.3-3)
$ uname -a
Linux debian 2.6.33-00175-g2d1299a0 #10 SMP PREEMPT Mon Mar 15 15:42:54 EET
2010 x86_64 GNU/Linux
The system has plenty of memory (4G of RAM + even more swap)
$ free
total used free shared buffers cached
Mem: 3980032 1392288 2587744 0 20492 569508
-/+ buffers/cache: 802288 3177744
Swap: 5863704 777788 5085916
--
Summary: gcc -O3: exhausts memory on whetstone.cbe.
Product: gcc
Version: 4.4.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: edwintorok at gmail dot com
GCC build triplet: x86_64-linux-gnu
GCC host triplet: x86_64-linux-gnu
GCC target triplet: x86_64-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43472
