Subzero: Randomly insert nops.

src/IceCfgNode.cpp

Index: src/IceCfgNode.cpp
diff --git a/src/IceCfgNode.cpp b/src/IceCfgNode.cpp
index 22915b2f37bbe9f72ca06d10bfba912302543a0a..61e53bedaad852daed4ab9ee18bb317af24f3000 100644
--- a/src/IceCfgNode.cpp
+++ b/src/IceCfgNode.cpp
@@ -191,6 +191,15 @@ void CfgNode::doAddressOpt() {
   }
 }
 
+void CfgNode::doNopInsertion() {
+  TargetLowering *Target = Func->getTarget();
+  LoweringContext &Context = Target->getContext();
+  Context.init(this);
+  while (!Context.atEnd()) {
+    Target->doNopInsertion();
+  }
+}
+
 // Drives the target lowering.  Passes the current instruction and the
 // next non-deleted instruction for target lowering.
 void CfgNode::genCode() {