iterator_range accessor for CodeGenTarget instruction list.

llvm-svn: 206551
diff --git a/llvm/utils/TableGen/CodeGenTarget.h b/llvm/utils/TableGen/CodeGenTarget.h
index d6458f4..5414310 100644
--- a/llvm/utils/TableGen/CodeGenTarget.h
+++ b/llvm/utils/TableGen/CodeGenTarget.h
@@ -171,6 +171,9 @@
   typedef std::vector<const CodeGenInstruction*>::const_iterator inst_iterator;
   inst_iterator inst_begin() const{return getInstructionsByEnumValue().begin();}
   inst_iterator inst_end() const { return getInstructionsByEnumValue().end(); }
+  iterator_range<inst_iterator> instructions() const {
+    return iterator_range<inst_iterator>(inst_begin(), inst_end());
+  }
 
 
   /// isLittleEndianEncoding - are instruction bit patterns defined as  [0..n]?