configured with: /usr/local/src/add-on/gcc-3.0.2/configure 
 --prefix=/usr/add-on/gcc-3.0.2
 Description:	The values of the two occurrences of (tmpvar->num = tmpnum)
 		are not computed correctly; I think the compiler loses track
 		of which registers contain each value.  I also see the same
 		error in the IBM S390 version of the compiler.  The test
 		program should exit with status = 0 if the compilation is
 		valid, status = 1 if invalid.  The Sun WorkShop Compiler 5.0
 		compiles this code correctly.
 How-To-Repeat:	gcc -o gccerr gccerr.c; ./gccerr; echo $?
 Fix:		Simplify expression
 
 
 --==_Exmh_-1288580240
 Content-Type: text/plain ; name="gccerr.c"; charset=us-ascii
 Content-Description: gccerr.c
 Content-Disposition: attachment; filename="gccerr.c"
 
 typedef struct {
 	char	*str;		/* the actual str 		    */
 	int	len;		/* len of malloc'ed space 	    */
 	int	refcnt;		/* number of times this string in use */
 } STR, *STRP;
 
 typedef struct {
 	STRP	string;
 	double	num;	    	/* num if pss and used      	    */
 	char	cur;        	/* indication of current type	    */
 } VAR, *VARP;
 
 extern double atof();
 extern int strlen();
 extern void exit();
 
 STR	s_temp = { "asdf", 5, 1 };
 VAR	s_Au_temp = { &s_temp, 0.0, 1 };
 STR	s_zero = { "0.0", 4, 3 };
 VAR	s_Au_subs = { &s_zero, 0.0, 1 };
 VAR	s_Au_send = { &s_zero, 0.0, 1 };
 VAR	s_Au_slen = { &s_zero, 0.0, 1 };
 VARP    tmpvar;
 double  tmpnum;
 
 VARP	Au_temp = &s_Au_temp;
 VARP	Au_subs = &s_Au_subs;
 VARP	Au_send = &s_Au_send;
 VARP	Au_slen = &s_Au_slen;
 
 main()
 {
 	if (  (   (  Au_subs->cur & (1<<1) )
 	       || (  Au_subs->cur |= (1<<1)
 		   , Au_subs->num = atof(( Au_subs->string->str ) ) ) )
 	    , (  (  (  (tmpnum = ( (Au_subs->num + 255)  ))
 		     , (tmpvar = (  Au_send  ))
 		     , (tmpvar->cur = ((1<<1) | (1<<2) | (1<<3) ) ) )
 		  , (tmpvar->num = tmpnum) )
 	       > (  (  (tmpnum = (  ((double)strlen(( Au_temp->string->str ))) ))
 		     , (tmpvar = (  Au_slen  ))
 		     , (tmpvar->cur = ((1<<1) | (1<<2) | (1<<3)) ) )
 		  , (tmpvar->num = tmpnum)) ) )
 	{
 	    exit(0);	/* correct */
 	}
 	else
 	{
 	    exit(1);	/* invalid */
 	}
 }

Release:
unknown