[builtins] Introduce proper Float64Tan operator.

src/crankshaft/x64/lithium-x64.h

 // Copyright 2012 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_CRANKSHAFT_X64_LITHIUM_X64_H_
 #define V8_CRANKSHAFT_X64_LITHIUM_X64_H_
 
 #include "src/crankshaft/hydrogen.h"
 #include "src/crankshaft/lithium.h"
 #include "src/crankshaft/lithium-allocator.h"
@@ skipping 35 matching lines @@
   V(CompareNumericAndBranch)                 \
   V(CmpObjectEqAndBranch)                    \
   V(CmpHoleAndBranch)                        \
   V(CmpMapAndBranch)                         \
   V(CmpT)                                    \
   V(ConstantD)                               \
   V(ConstantE)                               \
   V(ConstantI)                               \
   V(ConstantS)                               \
   V(ConstantT)                               \
-  V(ConstructDouble)                         \
   V(Context)                                 \
   V(DebugBreak)                              \
   V(DeclareGlobals)                          \
   V(Deoptimize)                              \
   V(DivByConstI)                             \
   V(DivByPowerOf2I)                          \
   V(DivI)                                    \
   V(DoubleBits)                              \
   V(DoubleToI)                               \
   V(DoubleToSmi)                             \
@@ skipping 2276 matching lines @@
     inputs_[0] = value;
   }
 
   LOperand* value() { return inputs_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(DoubleBits, "double-bits")
   DECLARE_HYDROGEN_ACCESSOR(DoubleBits)
 };
 
 
-class LConstructDouble final : public LTemplateInstruction<1, 2, 0> {
- public:
-  LConstructDouble(LOperand* hi, LOperand* lo) {
-    inputs_[0] = hi;
-    inputs_[1] = lo;
-  }
-
-  LOperand* hi() { return inputs_[0]; }
-  LOperand* lo() { return inputs_[1]; }
-
-  DECLARE_CONCRETE_INSTRUCTION(ConstructDouble, "construct-double")
-};
-
-
 class LAllocate final : public LTemplateInstruction<1, 2, 1> {
  public:
   LAllocate(LOperand* context, LOperand* size, LOperand* temp) {
     inputs_[0] = context;
     inputs_[1] = size;
     temps_[0] = temp;
   }
 
   LOperand* context() { return inputs_[0]; }
   LOperand* size() { return inputs_[1]; }
@@ skipping 290 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_X64_LITHIUM_X64_H_