[turbofan] support small immediates

test/unittests/compiler/instruction-selector-unittest.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_UNITTESTS_COMPILER_INSTRUCTION_SELECTOR_UNITTEST_H_
 #define V8_UNITTESTS_COMPILER_INSTRUCTION_SELECTOR_UNITTEST_H_
 
 #include <deque>
 #include <set>
 
@@ skipping 191 matching lines @@
     }
 
     Constant ToConstant(const InstructionOperand* operand) const {
       ConstantMap::const_iterator i;
       if (operand->IsConstant()) {
         i = constants_.find(ConstantOperand::cast(operand)->virtual_register());
         EXPECT_EQ(ConstantOperand::cast(operand)->virtual_register(), i->first);
         EXPECT_FALSE(constants_.end() == i);
       } else {
         EXPECT_EQ(InstructionOperand::IMMEDIATE, operand->kind());
-        i = immediates_.find(ImmediateOperand::cast(operand)->index());
-        EXPECT_EQ(ImmediateOperand::cast(operand)->index(), i->first);
+        auto imm = ImmediateOperand::cast(operand);
+        if (imm->type() == ImmediateOperand::INLINE) {
+          return Constant(imm->inline_value());
+        }
+        i = immediates_.find(imm->indexed_value());
+        EXPECT_EQ(imm->indexed_value(), i->first);
         EXPECT_FALSE(immediates_.end() == i);
       }
       return i->second;
     }
 
     friend class StreamBuilder;
 
     typedef std::map<int, Constant> ConstantMap;
     typedef std::map<NodeId, int> VirtualRegisters;
 
@@ skipping 13 matching lines @@
 template <typename T>
 class InstructionSelectorTestWithParam
     : public InstructionSelectorTest,
       public ::testing::WithParamInterface<T> {};
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_UNITTESTS_COMPILER_INSTRUCTION_SELECTOR_UNITTEST_H_