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.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@220010 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 8 insertions, 0 deletions

diff --git a/gcc/dse.c b/gcc/dse.c
index ea6f24585c5..2bb20d74625 100644
--- a/gcc/dse.c
+++ b/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);
     }