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The following bug report relates to the following systems:

gcc 2.7.0 under Sun Sparc Solaris 2.4
gcc 2.7.2 under Sun Sparc Solaris 2.4
gcc 2.7.0 under Sun Sparc SunOS 4.1.4
gcc 2.7.0 under IBM PowerPC AIX 3.2.5

In all cases the only option given to gcc was "-O".

------------------------------------------------------------------------

With gcc 2.7.x, the optimizer considers the pointer dereference to
be a constant, and moves the dereference outside the loop.  This is
not the behaviour of 2.6.3.  The code below is reduced from a much
larger program.

Andy Fyfe
bandr@best.com

static void
set(char *x)
{
    *x = 'x';
}

main()
{
    int i;
    char x = '\0';

    for (i=0; i<10; ++i) {
	set(&x); 
	if (*(const char *)&x != 'x') {
	    printf("Error!\n");
	    exit(1);
	}
    }
    printf("OK!\n");
    exit(0);
}