[Bug c/47825] New: SSE bitwise operations on floats work -g, fail -O3

["cck0011 at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47825

           Summary: SSE bitwise operations on floats work -g, fail -O3
           Product: gcc
           Version: 4.3.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: cck0011@yahoo.com


Created attachment 23413
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23413
.i file

Hi folks,

  I'm trying the vec_sel() example using SSE (bitwise and, or, andnot) to
select bits from two vectors to build a third. It works under -g, but fails
under -O3.
What am I missing?

thanks.


gcc -v
Using built-in specs.
Target: i386-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla
--enable-bootstrap --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk
--disable-dssi --enable-plugin
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre
--enable-libgcj-multifile --enable-java-maintainer-mode
--with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib
--with-cpu=generic --build=i386-redhat-linux
Thread model: posix
gcc version 4.3.2 20081105 (Red Hat 4.3.2-7) (GCC)

works under:
  cc -g -o setel setel.c  -msse -mmmx -pedantic -Wall

fails under:
  cc -O3 -o setel setel.c  -msse -mmmx -pedantic -Wall


.i file attached