Add a basic-block autovectorization pass.

This is the initial checkin of the basic-block autovectorization pass along with some supporting vectorization infrastructure.
Special thanks to everyone who helped review this code over the last several months (especially Tobias Grosser).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149468 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Transforms/Vectorize.h

@@ -0,0 +1,30 @@
+//===-- Vectorize.h - Vectorization Transformations -------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This header file defines prototypes for accessor functions that expose passes
+// in the Vectorize transformations library.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TRANSFORMS_VECTORIZE_H
+#define LLVM_TRANSFORMS_VECTORIZE_H
+
+namespace llvm {
+
+class BasicBlockPass;
+
+//===----------------------------------------------------------------------===//
+//
+// BBVectorize - A basic-block vectorization pass.
+//
+BasicBlockPass *createBBVectorizePass();
+
+} // End llvm namespace
+
+#endif