re PR rtl-optimization/64557 (get_addr in true_dependence_1 cannot handle VALUE inside an expr)

2015-01-22  Wei Mi  <wmi@google.com>

        PR rtl-optimization/64557
        * dse.c (record_store): Call get_addr for mem_addr.
        (check_mem_read_rtx): Likewise.

From-SVN: r220010

gcc/ChangeLog

+2015-01-22  Wei Mi  <wmi@google.com>
+
+	PR rtl-optimization/64557
+	* dse.c (record_store): Call get_addr for mem_addr.
+	(check_mem_read_rtx): Likewise.
+
 2015-01-22  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* fold-const.c (const_binop): Add early return for non-tcc_binary.

gcc/dse.c

@@ -1575,6 +1575,10 @@ record_store (rtx body, bb_info_t bb_info)
 	    = rtx_group_vec[group_id];
 	  mem_addr = group->canon_base_addr;
 	}
+      /* get_addr can only handle VALUE but cannot handle expr like:
+	 VALUE + OFFSET, so call get_addr to get original addr for
+	 mem_addr before plus_constant.  */
+      mem_addr = get_addr (mem_addr);
       if (offset)
 	mem_addr = plus_constant (get_address_mode (mem), mem_addr, offset);
     }
@@ -2188,6 +2192,10 @@ check_mem_read_rtx (rtx *loc, bb_info_t bb_info)
 	    = rtx_group_vec[group_id];
 	  mem_addr = group->canon_base_addr;
 	}
+      /* get_addr can only handle VALUE but cannot handle expr like:
+	 VALUE + OFFSET, so call get_addr to get original addr for
+	 mem_addr before plus_constant.  */
+      mem_addr = get_addr (mem_addr);
       if (offset)
 	mem_addr = plus_constant (get_address_mode (mem), mem_addr, offset);
     }