Ensure consistent result of transcendental functions.

src/hydrogen.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5402 matching lines @@
 bool HGraphBuilder::TryInlineBuiltinFunctionCall(Call* expr, bool drop_extra) {
   if (!expr->target()->shared()->HasBuiltinFunctionId()) return false;
   BuiltinFunctionId id = expr->target()->shared()->builtin_function_id();
   switch (id) {
     case kMathRound:
     case kMathAbs:
     case kMathSqrt:
     case kMathLog:
     case kMathSin:
     case kMathCos:
+    case kMathTan:
       if (expr->arguments()->length() == 1) {
         HValue* argument = Pop();
         HValue* context = environment()->LookupContext();
         Drop(1);  // Receiver.
         HUnaryMathOperation* op =
             new(zone()) HUnaryMathOperation(context, argument, id);
         op->set_position(expr->position());
         if (drop_extra) Drop(1);  // Optionally drop the function.
         ast_context()->ReturnInstruction(op, expr->id());
         return true;
@@ skipping 40 matching lines @@
         return true;
       }
       break;
     case kMathRound:
     case kMathFloor:
     case kMathAbs:
     case kMathSqrt:
     case kMathLog:
     case kMathSin:
     case kMathCos:
+    case kMathTan:
       if (argument_count == 2 && check_type == RECEIVER_MAP_CHECK) {
         AddCheckConstantFunction(expr, receiver, receiver_map, true);
         HValue* argument = Pop();
         HValue* context = environment()->LookupContext();
         Drop(1);  // Receiver.
         HUnaryMathOperation* op =
             new(zone()) HUnaryMathOperation(context, argument, id);
         op->set_position(expr->position());
         ast_context()->ReturnInstruction(op, expr->id());
         return true;
@@ skipping 2552 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify(false);  // No full verify.
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal