Do not add values to HGraph in Lithium.

src/arm/lithium-arm.h

Index: src/arm/lithium-arm.h
diff --git a/src/arm/lithium-arm.h b/src/arm/lithium-arm.h
index 7574e15329ce0302ea5f3fcb1945232e4535f36e..559f26e5da886f9e2c61bdff1a2ffc515431d453 100644
--- a/src/arm/lithium-arm.h
+++ b/src/arm/lithium-arm.h
@@ -91,6 +91,7 @@ class LCodeGen;
   V(DoubleToI)                                  \
   V(DoubleToSmi)                                \
   V(Drop)                                       \
+  V(Dummy)                                      \
   V(DummyUse)                                   \
   V(ElementsKind)                               \
   V(ForInCacheArray)                            \
@@ -424,6 +425,13 @@ class LLazyBailout V8_FINAL : public LTemplateInstruction<0, 0, 0> {
 };
 
 
+class LDummy V8_FINAL : public LTemplateInstruction<1, 0, 0> {
+ public:
+  explicit LDummy() { }
+  DECLARE_CONCRETE_INSTRUCTION(Dummy, "dummy")
+};
+
+
 class LDummyUse V8_FINAL : public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LDummyUse(LOperand* value) {