diff --git a/gcc/tree-vect-patterns.c b/gcc/tree-vect-patterns.c
index f034635..948203d 100644
--- a/gcc/tree-vect-patterns.c
+++ b/gcc/tree-vect-patterns.c
@@ -76,6 +76,10 @@ static gimple vect_recog_vector_vector_shift_pattern (vec<gimple> *,
 						      tree *, tree *);
 static gimple vect_recog_divmod_pattern (vec<gimple> *,
 					 tree *, tree *);
+
+static gimple vect_recog_multconst_pattern (vec<gimple> *,
+                                         tree *, tree *);
+
 static gimple vect_recog_mixed_size_cond_pattern (vec<gimple> *,
 						  tree *, tree *);
 static gimple vect_recog_bool_pattern (vec<gimple> *, tree *, tree *);
@@ -90,6 +94,7 @@ static vect_recog_func_ptr vect_vect_recog_func_ptrs[NUM_PATTERNS] = {
 	vect_recog_rotate_pattern,
 	vect_recog_vector_vector_shift_pattern,
 	vect_recog_divmod_pattern,
+        vect_recog_multconst_pattern,
 	vect_recog_mixed_size_cond_pattern,
 	vect_recog_bool_pattern};
 
@@ -2147,6 +2152,87 @@ vect_recog_vector_vector_shift_pattern (vec<gimple> *stmts,
   return pattern_stmt;
 }
 
+static gimple
+vect_recog_multconst_pattern (vec<gimple> *stmts,
+                           tree *type_in, tree *type_out)
+{
+  gimple last_stmt = stmts->pop ();
+  tree oprnd0, oprnd1, vectype, itype;
+  gimple pattern_stmt;
+  enum tree_code rhs_code;
+  optab optab;
+  stmt_vec_info stmt_vinfo = vinfo_for_stmt (last_stmt);
+
+  if (!is_gimple_assign (last_stmt))
+    return NULL;
+
+  rhs_code = gimple_assign_rhs_code (last_stmt);
+  switch (rhs_code)
+    {
+    case MULT_EXPR:
+      break;
+    default:
+      return NULL;
+    }
+
+  if (STMT_VINFO_IN_PATTERN_P (stmt_vinfo))
+    return NULL;
+
+  oprnd0 = gimple_assign_rhs1 (last_stmt);
+  oprnd1 = gimple_assign_rhs2 (last_stmt);
+  itype = TREE_TYPE (oprnd0);
+
+  if (TREE_CODE (oprnd0) != SSA_NAME
+      || TREE_CODE (oprnd1) != INTEGER_CST
+      || TREE_CODE (itype) != INTEGER_TYPE
+      || TYPE_PRECISION (itype) != GET_MODE_PRECISION (TYPE_MODE (itype)))
+    return NULL;
+
+  vectype = get_vectype_for_scalar_type (itype);
+  if (vectype == NULL_TREE)
+    return NULL;
+
+  /* If the target can handle vectorized multiplication natively,
+     don't attempt to optimize this.  */
+  optab = optab_for_tree_code (rhs_code, vectype, optab_default);
+  if (optab != unknown_optab)
+    {
+      machine_mode vec_mode = TYPE_MODE (vectype);
+      int icode = (int) optab_handler (optab, vec_mode);
+      if (icode != CODE_FOR_nothing)
+        return NULL;
+    }
+
+  /* If target cannot handle vector left shift then we cannot 
+     optimize and bail out.  */ 
+  optab = optab_for_tree_code (LSHIFT_EXPR, vectype, optab_vector);
+  if (!optab
+      || optab_handler (optab, TYPE_MODE (vectype)) == CODE_FOR_nothing)
+        return NULL;
+
+  if (integer_pow2p (oprnd1))
+    {
+      /* Pattern detected.  */
+      if (dump_enabled_p ())
+	dump_printf_loc (MSG_NOTE, vect_location,
+			 "vect_recog_multconst_pattern: detected:\n");
+
+      tree shift;
+      shift = build_int_cst (itype, tree_log2 (oprnd1));
+      pattern_stmt = gimple_build_assign (vect_recog_temp_ssa_var (itype, NULL),
+					  LSHIFT_EXPR, oprnd0, shift);
+      if (dump_enabled_p ())
+	dump_gimple_stmt_loc (MSG_NOTE, vect_location, TDF_SLIM, pattern_stmt,
+                              0);
+      stmts->safe_push (last_stmt);
+      *type_in = vectype;
+      *type_out = vectype;
+      return pattern_stmt;
+    } 
+
+  return NULL;
+}
+
 /* Detect a signed division by a constant that wouldn't be
    otherwise vectorized:
 
diff --git a/gcc/tree-vectorizer.h b/gcc/tree-vectorizer.h
index 48c1f8d..833fe4b 100644
--- a/gcc/tree-vectorizer.h
+++ b/gcc/tree-vectorizer.h
@@ -1131,7 +1131,7 @@ extern void vect_slp_transform_bb (basic_block);
    Additional pattern recognition functions can (and will) be added
    in the future.  */
 typedef gimple (* vect_recog_func_ptr) (vec<gimple> *, tree *, tree *);
-#define NUM_PATTERNS 12
+#define NUM_PATTERNS 13
 void vect_pattern_recog (loop_vec_info, bb_vec_info);
 
 /* In tree-vectorizer.c.  */
