diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f4302dc8b75..7d7e19180dc 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2010-12-02  Richard Guenther  <rguenther@suse.de>
+	    Ira Rosen  <irar@il.ibm.com>
+
+	PR tree-optimization/46663
+	* tree-vect-patterns.c (vect_recog_pow_pattern): Check that
+	FUNCTION_DECL exists and that it's a builtin.
+
 2010-12-02  Jie Zhang  <jie@codesourcery.com>
 
 	PR middle-end/46674
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index d70e0b19953..e0ca3527c1d 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2010-12-02  Richard Guenther  <rguenther@suse.de>
+            Ira Rosen  <irar@il.ibm.com>
+
+	PR tree-optimization/46663
+	* gcc.dg/vect/pr46663.c: New test.
+
 2010-12-02  Jie Zhang  <jie@codesourcery.com>
 
 	PR middle-end/46674
diff --git a/gcc/testsuite/gcc.dg/vect/pr46663.c b/gcc/testsuite/gcc.dg/vect/pr46663.c
new file mode 100644
index 00000000000..42a1ffbbc4b
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/pr46663.c
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-options "-O -ftree-vectorize -fdump-tree-vect-details -fexceptions" } */
+
+typedef __attribute__ ((const)) int (*bart) (void);
+
+int foo (bart bar, int m)
+{
+  int i, j = 0;
+  for (i = 0; i < m; i++)
+    j += bar();
+  return j;
+}
+
+/* { dg-final { cleanup-tree-dump "vect" } } */
diff --git a/gcc/tree-vect-patterns.c b/gcc/tree-vect-patterns.c
index b55bacb7ec7..d4053044de9 100644
--- a/gcc/tree-vect-patterns.c
+++ b/gcc/tree-vect-patterns.c
@@ -472,6 +472,9 @@ vect_recog_pow_pattern (gimple last_stmt, tree *type_in, tree *type_out)
     return NULL;
 
   fn = gimple_call_fndecl (last_stmt);
+  if (fn == NULL_TREE || DECL_BUILT_IN_CLASS (fn) != BUILT_IN_NORMAL)
+   return NULL;
+
   switch (DECL_FUNCTION_CODE (fn))
     {
     case BUILT_IN_POWIF: