diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 40522695b5837c25b00fd5b84f056a1dd82f9171..365a719ed81d1a039376f6ac4689da8047e2c141 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2010-07-02  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/44748
+	* tree-ssa-ccp.c (fold_const_aggregate_ref): Properly handle
+	the embedded conversion in MEM_REFs.
+
 2010-07-01  López-Ibáñez  <manu@gcc.gnu.org>
 
 	* reload.c: Include toplev.h.
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 8d84acde18070f0c6d20c9b872cc968498bcb48c..d9c0a99a7bd09f29b9a276e952915233a739c7f0 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2010-07-02  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/44748
+	* gcc.dg/tree-ssa/ssa-ccp-29.c: New testcase.
+
 2010-07-02  Iain Sandoe  <iains@gcc.gnu.org>
 
 	* objc-obj-c++-shared/next-abi.h: Remove dependency on system
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-ccp-29.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-ccp-29.c
new file mode 100644
index 0000000000000000000000000000000000000000..44d2945a311f938f1d0f9fe54b1e7d5c4d325a5f
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-ccp-29.c
@@ -0,0 +1,11 @@
+/* { dg-do compile } */
+/* { dg-options "-O -fdump-tree-ccp2" } */
+
+static double num;
+int foo (void)
+{
+  return *(unsigned *)&num;
+}
+
+/* { dg-final { scan-tree-dump "return 0;" "ccp2" } } */
+/* { dg-final { cleanup-tree-dump "ccp2" } } */
diff --git a/gcc/tree-ssa-ccp.c b/gcc/tree-ssa-ccp.c
index 912c5059363aa9d287dda98bc4b0ecbf20a5179d..1e2309acb167d0821c076062d9665b647280ec37 100644
--- a/gcc/tree-ssa-ccp.c
+++ b/gcc/tree-ssa-ccp.c
@@ -1317,7 +1317,14 @@ fold_const_aggregate_ref (tree t)
 	  if (DECL_P (base)
 	      && !AGGREGATE_TYPE_P (TREE_TYPE (base))
 	      && integer_zerop (TREE_OPERAND (t, 1)))
-	    return get_symbol_constant_value (base);
+	    {
+	      tree res = get_symbol_constant_value (base);
+	      if (res
+		  && !useless_type_conversion_p
+		        (TREE_TYPE (t), TREE_TYPE (res)))
+		res = fold_unary (VIEW_CONVERT_EXPR, TREE_TYPE (t), res);
+	      return res;
+	    }
 
 	  if (!TREE_READONLY (base)
 	      || TREE_CODE (TREE_TYPE (base)) != ARRAY_TYPE