[Bug tree-optimization/36861] [4.3 Regression] boost's compressed avl confuses GCC

["lothar at tradescape dot biz" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #19 from lothar at tradescape dot biz  2008-07-28 18:55 -------
Created an attachment (id=15973)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15973&action=view)
oprofile logs

I compiled optimized executables with and without -fno-strict-aliasing and
generated an oprofile log for them:

/opt2/linux/ix86/bin/g++-4.3.1 -m64 -O3 -no-strict-aliasing -g
-I/opt2/linux/x86_64/include/boost-1_35 -DUSE_OPTIMIZATION=0 -o ./avltest-non
./avltest.cpp
/opt2/linux/ix86/bin/g++-4.3.1 -m64 -O3 -fno-strict-aliasing -g
-I/opt2/linux/x86_64/include/boost-1_35 -DUSE_OPTIMIZATION=0 -o ./avltest-non
./avltest.cpp
sudo opcontrol --reset; sudo opcontrol --start; ./avltest-no; ./avltest-non ;
sudo opcontrol --stop
opannotate --source --assembly --demangle=smart --threshold=1 ./avltest-no
>./avltest-no.oprofile.txt
opannotate --source --assembly --demangle=smart --threshold=1 ./avltest-non
>./avltest-non.oprofile.txt
diff -u ./avltest-no.oprofile.txt ./avltest-non.oprofile.txt
./avltest-diff.oprofile.txt

$ time ./avltest-non
sizeof(Node)=72
sizeof(NodeSet)=40
creating file ./avltest.img done
region.get_address()=0x7f4d43ed1000
region.get_size()=3600056
p_set=0x7f4d43ed1000
p_values=0x7f4d43ed1030
created/inserted 50000 entries
region.get_address()=0x7f4d43b62000
region.get_size()=3600056
p_set=0x7f4d43b62000
p_values=0x7f4d43b62030
checked 50000 entries, result=1249975000

real    0m0.614s
user    0m0.140s
sys     0m0.016s

$ time ./avltest-no
sizeof(Node)=72
sizeof(NodeSet)=40
creating file ./avltest.img done
region.get_address()=0x7f7fdce43000
region.get_size()=3600056
p_set=0x7f7fdce43000
p_values=0x7f7fdce43030
created/inserted 50000 entries
region.get_address()=0x7f7fdcad4000
region.get_size()=3600056
p_set=0x7f7fdcad4000
p_values=0x7f7fdcad4030
checked 50000 entries, result=1249975000

real    0m22.634s
user    0m22.277s
sys     0m0.120s

I hope these tests aid in finding the problem


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36861