re PR rtl-optimization/10955 ([SPARC] wrong code at -O3 for structure argument…

re PR rtl-optimization/10955 ([SPARC] wrong code at -O3 for structure argument in context of structure return)

	PR optimization/10955
	* unroll.c (unroll_loop): Fix off-by-one bug.

From-SVN: r67870

gcc/ChangeLog

+2003-06-13  Eric Botcazou  <ebotcazou@libertysurf.fr>
+
+	PR optimization/10955
+	* unroll.c (unroll_loop): Fix off-by-one bug.
+
 2003-06-12  Aldy Hernandez  <aldyh@redhat.com>
 
         * config/rs6000/rs6000.c (function_arg): Remove typo.

gcc/testsuite/ChangeLog

+2003-06-13  Eric Botcazou  <ebotcazou@libertysurf.fr>
+
+	* gcc.c-torture/execute/20030611-1.c: New test.
+
 2003-06-12  Roger Sayle  <roger@eyesopen.com>
 
 	PR middle-end/168

gcc/unroll.c

@@ -791,9 +791,9 @@ unroll_loop (loop, insn_count, strength_reduce_p)
       /* We must limit the generic test to max_reg_before_loop, because only
 	 these pseudo registers have valid regno_first_uid info.  */
       for (r = FIRST_PSEUDO_REGISTER; r < max_reg_before_loop; ++r)
-	if (REGNO_FIRST_UID (r) > 0 && REGNO_FIRST_UID (r) <= max_uid_for_loop
+	if (REGNO_FIRST_UID (r) > 0 && REGNO_FIRST_UID (r) < max_uid_for_loop
 	    && REGNO_FIRST_LUID (r) >= copy_start_luid
-	    && REGNO_LAST_UID (r) > 0 && REGNO_LAST_UID (r) <= max_uid_for_loop
+	    && REGNO_LAST_UID (r) > 0 && REGNO_LAST_UID (r) < max_uid_for_loop
 	    && REGNO_LAST_LUID (r) <= copy_end_luid)
 	  {
 	    /* However, we must also check for loop-carried dependencies.