re PR rtl-optimization/45834 (Redundant inter-loop edges in DDG)

2010-10-21  Bingfeng Mei  <bmei@broadcom.com>

	PR c/45834
        * alias.c (true_dependence_1): Remove obsolete check for QImode.
        (may_alias_p): Ditto.

From-SVN: r165781

gcc/ChangeLog

+2010-10-21  Bingfeng Mei  <bmei@broadcom.com>
+
+	PR c/45834
+        * alias.c (true_dependence_1): Remove obsolete check for QImode.
+        (may_alias_p): Ditto.
+        
 2010-10-21  Martin Jambor  <mjambor@suse.cz>
 
 	PR tree-optimization/45875

gcc/alias.c

@@ -2459,7 +2459,7 @@ true_dependence_1 (const_rtx mem, enum machine_mode mem_mode, rtx mem_addr,
 
   /* We cannot use aliases_everything_p to test MEM, since we must look
      at MEM_ADDR, rather than XEXP (mem, 0).  */
-  if (mem_mode == QImode || GET_CODE (mem_addr) == AND)
+  if (GET_CODE (mem_addr) == AND)
     return 1;
 
   /* ??? In true_dependence we also allow BLKmode to alias anything.  Why
@@ -2655,7 +2655,7 @@ may_alias_p (const_rtx mem, const_rtx x)
 
   /* We cannot use aliases_everything_p to test MEM, since we must look
      at MEM_ADDR, rather than XEXP (mem, 0).  */
-  if (GET_MODE (mem) == QImode || GET_CODE (mem_addr) == AND)
+  if (GET_CODE (mem_addr) == AND)
     return 1;
 
   if (fixed_scalar_and_varying_struct_p (mem, x, mem_addr, x_addr,