------- Comment #4 from rwgk at yahoo dot com 2008-12-07 07:44 -------
Testing with:
g++ (GCC) 4.4.0 20081206 (experimental)
svn revision 142514
pr37922repro1.cpp should always exit with status 0.
However, it fails this test when compiling with -O3 and -O2:
g++ -Wall -fPIC -O3 pr37922repro1.cpp
./a.out ; echo $status
2
g++ -Wall -fPIC -O2 pr37922repro1.cpp
./a.out ; echo $status
2
g++ -Wall -fPIC -O1 pr37922repro1.cpp
./a.out ; echo $status
0
g++ -Wall -fPIC -O0 pr37922repro1.cpp
./a.out ; echo $status
0
The -fPIC is critical.
The problem region in the reproducer is marked with comments:
// THE PROBLEM IS AROUND HERE
if (proper_order < 0) {
proper_order *= -1;
proper_r = -proper_r; // THIS FAILS ...
}
if (proper_order > 1) {
rot_mx rmi = proper_r.minus_unit_mx(); // ... THEREFORE WRONG HERE
Sorry it is still 556 lines long, but I already spent 2 1/2 hours
reducing it this far. At least, it is completely self-contained and
compiles in fractions of a second.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37922
