diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 06f8dcf68c5..a7736fdfe9b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2012-03-05  Richard Guenther  <rguenther@suse.de>
+
+	* tree.c (integer_zerop): Handle VECTOR_CSTs.
+	(integer_onep): Likewise.
+	(integer_all_onesp): Likewise.
+
 2012-03-05  Georg-Johann Lay  <avr@gjlay.de>
 
 	* config/avr/avr.md (*umaddqihi4.2): New insn-and-split.
diff --git a/gcc/tree.c b/gcc/tree.c
index fa01583a518..3b8f6785a12 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -1714,12 +1714,25 @@ integer_zerop (const_tree expr)
 {
   STRIP_NOPS (expr);
 
-  return ((TREE_CODE (expr) == INTEGER_CST
-	   && TREE_INT_CST_LOW (expr) == 0
-	   && TREE_INT_CST_HIGH (expr) == 0)
-	  || (TREE_CODE (expr) == COMPLEX_CST
-	      && integer_zerop (TREE_REALPART (expr))
-	      && integer_zerop (TREE_IMAGPART (expr))));
+  switch (TREE_CODE (expr))
+    {
+    case INTEGER_CST:
+      return (TREE_INT_CST_LOW (expr) == 0
+	      && TREE_INT_CST_HIGH (expr) == 0);
+    case COMPLEX_CST:
+      return (integer_zerop (TREE_REALPART (expr))
+	      && integer_zerop (TREE_IMAGPART (expr)));
+    case VECTOR_CST:
+      {
+	tree elt;
+	for (elt = TREE_VECTOR_CST_ELTS (expr); elt; elt = TREE_CHAIN (elt))
+	  if (!integer_zerop (TREE_VALUE (elt)))
+	    return false;
+	return true;
+      }
+    default:
+      return false;
+    }
 }
 
 /* Return 1 if EXPR is the integer constant one or the corresponding
@@ -1730,12 +1743,25 @@ integer_onep (const_tree expr)
 {
   STRIP_NOPS (expr);
 
-  return ((TREE_CODE (expr) == INTEGER_CST
-	   && TREE_INT_CST_LOW (expr) == 1
-	   && TREE_INT_CST_HIGH (expr) == 0)
-	  || (TREE_CODE (expr) == COMPLEX_CST
-	      && integer_onep (TREE_REALPART (expr))
-	      && integer_zerop (TREE_IMAGPART (expr))));
+  switch (TREE_CODE (expr))
+    {
+    case INTEGER_CST:
+      return (TREE_INT_CST_LOW (expr) == 1
+	      && TREE_INT_CST_HIGH (expr) == 0);
+    case COMPLEX_CST:
+      return (integer_onep (TREE_REALPART (expr))
+	      && integer_zerop (TREE_IMAGPART (expr)));
+    case VECTOR_CST:
+      {
+	tree elt;
+	for (elt = TREE_VECTOR_CST_ELTS (expr); elt; elt = TREE_CHAIN (elt))
+	  if (!integer_onep (TREE_VALUE (elt)))
+	    return false;
+	return true;
+      }
+    default:
+      return false;
+    }
 }
 
 /* Return 1 if EXPR is an integer containing all 1's in as much precision as
@@ -1754,6 +1780,15 @@ integer_all_onesp (const_tree expr)
       && integer_zerop (TREE_IMAGPART (expr)))
     return 1;
 
+  else if (TREE_CODE (expr) == VECTOR_CST)
+    {
+      tree elt;
+      for (elt = TREE_VECTOR_CST_ELTS (expr); elt; elt = TREE_CHAIN (elt))
+	if (!integer_all_onesp (TREE_VALUE (elt)))
+	  return 0;
+      return 1;
+    }
+
   else if (TREE_CODE (expr) != INTEGER_CST)
     return 0;