Add a thumb2 pass to insert IT blocks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75218 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMTargetMachine.cpp b/lib/Target/ARM/ARMTargetMachine.cpp
index b3faada..a827784 100644
--- a/lib/Target/ARM/ARMTargetMachine.cpp
+++ b/lib/Target/ARM/ARMTargetMachine.cpp
@@ -173,6 +173,9 @@
       !DisableIfConversion && !Subtarget.isThumb())
     PM.add(createIfConverterPass());
 
+  if (Subtarget.isThumb2())
+    PM.add(createThumb2ITBlockPass());
+
   PM.add(createARMConstantIslandPass());
   return true;
 }