[turbofan] Properly lower NumberTan to Float64Tan.

src/compiler/representation-change.cc

 // Copyright 2015 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.
 
 #include "src/compiler/representation-change.h"
 
 #include <sstream>
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 680 matching lines @@
     case IrOpcode::kNumberLog:
       return machine()->Float64Log();
     case IrOpcode::kNumberLog1p:
       return machine()->Float64Log1p();
     case IrOpcode::kNumberLog2:
       return machine()->Float64Log2();
     case IrOpcode::kNumberLog10:
       return machine()->Float64Log10();
     case IrOpcode::kNumberSin:
       return machine()->Float64Sin();
+    case IrOpcode::kNumberTan:
+      return machine()->Float64Tan();
     case IrOpcode::kNumberSqrt:
       return machine()->Float64Sqrt();
     case IrOpcode::kNumberCbrt:
       return machine()->Float64Cbrt();
     case IrOpcode::kNumberExpm1:
       return machine()->Float64Expm1();
     case IrOpcode::kNumberSilenceNaN:
       return machine()->Float64SilenceNaN();
     default:
       UNREACHABLE();
@@ skipping 44 matching lines @@
 }
 
 Node* RepresentationChanger::InsertChangeTaggedToFloat64(Node* node) {
   return jsgraph()->graph()->NewNode(simplified()->ChangeTaggedToFloat64(),
                                      node);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8