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
diff --git a/tools/lto/Makefile b/tools/lto/Makefile
index ef78f82..153fa03 100644
--- a/tools/lto/Makefile
+++ b/tools/lto/Makefile
@@ -10,7 +10,7 @@
 LEVEL := ../..
 LIBRARYNAME := LTO
 LINK_COMPONENTS := all-targets ipo scalaropts linker bitreader bitwriter \
-                   mcdisassembler
+                   mcdisassembler vectorize
 LINK_LIBS_IN_SHARED := 1
 SHARED_LIBRARY := 1