[turbofan] support small immediates

test/cctest/compiler/test-jump-threading.cc

Index: test/cctest/compiler/test-jump-threading.cc
diff --git a/test/cctest/compiler/test-jump-threading.cc b/test/cctest/compiler/test-jump-threading.cc
index 1dc31bd94ddffe79117e5f374a5ddc0af7438e11..de34711534ebfd2a942d3dd80b2ebcf2af16367f 100644
--- a/test/cctest/compiler/test-jump-threading.cc
+++ b/test/cctest/compiler/test-jump-threading.cc
@@ -66,7 +66,7 @@ class TestCode : public HandleAndZoneScope {
     Start();
     sequence_.AddInstruction(Instruction::New(main_zone(), kArchNop));
     int index = static_cast<int>(sequence_.instructions().size()) - 1;
-    AddGapMove(index, ImmediateOperand::New(main_zone(), 11),
+    AddGapMove(index, ConstantOperand::New(main_zone(), 11),
                RegisterOperand::New(main_zone(), 11));
   }
   void Other() {
@@ -80,8 +80,7 @@ class TestCode : public HandleAndZoneScope {
     rpo_number_ = RpoNumber::FromInt(rpo_number_.ToInt() + 1);
   }
   InstructionOperand UseRpo(int num) {
-    int index = sequence_.AddImmediate(Constant(RpoNumber::FromInt(num)));
-    return ImmediateOperand(index);
+    return sequence_.AddImmediate(Constant(RpoNumber::FromInt(num)));
   }
   void Start(bool deferred = false) {
     if (current_ == NULL) {