[Bug middle-end/37096] conditional evaluation incorrect with -O3

[erik dot moller at cycos dot com]

------- Comment #5 from erik dot moller at cycos dot com  2008-08-18 16:22 
-------

the printf("shouldn't happen: %d\n", pAR[0]) happens when debug flags -O2 or
-O3 and -msse2 are set.
the printf("nz: %d\n", nZ); seems to do something awful...

void fun(short *pAR)
{
        const short tmp = Transform4x4(pAR);
        pAR[0] = 0;

        int nZ = 0;
        for( int i=0; i<4 ; ++i )
                if ( pAR[i] ) {
                        ++nZ;
                }

        printf("nz: %d\n", nZ);
        if ( pAR[0] )
                printf("shouldn't happen: %d\n", pAR[0]);
        pAR[0] = tmp;
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37096