[Bug tree-optimization/43692] small loop not vectorized

["wbrana at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #4 from wbrana at gmail dot com  2010-04-08 17:50 -------
I have got same code with -O2 and O3 on Gentoo

Using built-in specs.
Target: x86_64-pc-linux-gnu
Configured with:
/mnt/md3/cache/portage/sys-devel/gcc-4.4.3/work/gcc-4.4.3/configure
--prefix=/usr --bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/4.4.3
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.4.3
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.4.3/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.4.3/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/include/g++-v4
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --disable-altivec
--disable-fixed-point --with-ppl --with-cloog --disable-nls --with-system-zlib
--disable-checking --disable-werror --enable-secureplt --enable-multilib
--enable-libmudflap --disable-libssp --enable-libgomp --enable-cld
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/4.4.3/python
--enable-java-awt=gtk --enable-languages=c,c++,java,fortran --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu
--with-arch=core2 --with-tune=core2 --with-bugurl=http://bugs.gentoo.org/
--with-pkgversion='Gentoo 4.4.3 p1.0'
Thread model: posix
gcc version 4.4.3 (Gentoo 4.4.3 p1.0) 
COLLECT_GCC_OPTIONS='-v' '-O3' '-march=core2' '-save-temps'
'-fno-vect-cost-model' '-o' '4'
 /usr/libexec/gcc/x86_64-pc-linux-gnu/4.4.3/cc1 -E -quiet -v 4.c
-D_FORTIFY_SOURCE=2 -march=core2 -fno-vect-cost-model -O3 -fpch-preprocess -o
4.i
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/../../../../x86_64-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include
 /usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/include
 /usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/include-fixed
 /usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-O3' '-march=core2' '-save-temps'
'-fno-vect-cost-model' '-o' '4'
 /usr/libexec/gcc/x86_64-pc-linux-gnu/4.4.3/cc1 -fpreprocessed 4.i -quiet
-dumpbase 4.c -march=core2 -auxbase 4 -O3 -version -fno-vect-cost-model -o 4.s
GNU C (Gentoo 4.4.3 p1.0) version 4.4.3 (x86_64-pc-linux-gnu)
        compiled by GNU C version 4.4.3, GMP version 4.3.2, MPFR version
2.4.2-p3.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 35a36241d2e1e2c51694dabe4a5786db
COLLECT_GCC_OPTIONS='-v' '-O3' '-march=core2' '-save-temps'
'-fno-vect-cost-model' '-o' '4'
 /usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/../../../../x86_64-pc-linux-gnu/bin/as
-V -Qy -o 4.o 4.s
GNU assembler version 2.20.1 (x86_64-pc-linux-gnu) using BFD version (GNU
Binutils) 2.20.1.20100303
COMPILER_PATH=/usr/libexec/gcc/x86_64-pc-linux-gnu/4.4.3/:/usr/libexec/gcc/x86_64-pc-linux-gnu/4.4.3/:/usr/libexec/gcc/x86_64-pc-linux-gnu/:/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/:/usr/lib/gcc/x86_64-pc-linux-gnu/:/usr/libexec/gcc/x86_64-pc-linux-gnu/4.4.3/:/usr/libexec/gcc/x86_64-pc-linux-gnu/:/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/:/usr/lib/gcc/x86_64-pc-linux-gnu/:/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/../../../../x86_64-pc-linux-gnu/bin/
LIBRARY_PATH=/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/:/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/:/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/../../../../x86_64-pc-linux-gnu/lib/:/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-O3' '-march=core2' '-save-temps'
'-fno-vect-cost-model' '-o' '4'
 /usr/libexec/gcc/x86_64-pc-linux-gnu/4.4.3/collect2 --eh-frame-hdr -m
elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o 4
/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/../../../../lib64/crt1.o
/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/../../../../lib64/crti.o
/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/crtbegin.o
-L/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3
-L/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3
-L/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/../../../../lib64 -L/lib/../lib64
-L/usr/lib/../lib64
-L/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/../../../../x86_64-pc-linux-gnu/lib
-L/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/../../.. 4.o -lgcc --as-needed -lgcc_s
--no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed
/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/crtend.o
/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/../../../../lib64/crtn.o


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43692