Typo

llvm-svn: 26997
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index e7e8c4f..2a4c57d 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -1385,7 +1385,7 @@
   // Check if the value doesn't reference the second vector.
   SDOperand Elt = N->getOperand(0);
   assert(isa<ConstantSDNode>(Elt) && "Invalid VECTOR_SHUFFLE mask!");
-  for (unsigned i = 1, e = N->getNumOperands(); i != e; ++i) {
+  for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
     assert(isa<ConstantSDNode>(N->getOperand(i)) &&
            "Invalid VECTOR_SHUFFLE mask!");
     if (cast<ConstantSDNode>(N->getOperand(i))->getValue() >= 4) return false;