[runtime] Use DCHECK_EQ instead of DCHECK for number of args.

src/runtime/runtime-compiler.cc

 // 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.
 
 #include "src/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/asmjs/asm-js.h"
 #include "src/compiler-dispatcher/optimizing-compile-dispatcher.h"
 #include "src/compiler.h"
@@ skipping 109 matching lines @@
   if (function->shared()->code() ==
       isolate->builtins()->builtin(Builtins::kInstantiateAsmJs)) {
     function->shared()->ReplaceCode(
         isolate->builtins()->builtin(Builtins::kCompileLazy));
   }
   return Smi::kZero;
 }
 
 RUNTIME_FUNCTION(Runtime_NotifyStubFailure) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 0);
+  DCHECK_EQ(0, args.length());
   Deoptimizer* deoptimizer = Deoptimizer::Grab(isolate);
   DCHECK(AllowHeapAllocation::IsAllowed());
   delete deoptimizer;
   return isolate->heap()->undefined_value();
 }
 
 class ActivationsFinder : public ThreadVisitor {
  public:
   Code* code_;
   bool has_code_activations_;
@@ skipping 10 matching lines @@
     for (; !it->done(); it->Advance()) {
       JavaScriptFrame* frame = it->frame();
       if (code_->contains(frame->pc())) has_code_activations_ = true;
     }
   }
 };
 
 
 RUNTIME_FUNCTION(Runtime_NotifyDeoptimized) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 1);
+  DCHECK_EQ(1, args.length());
   CONVERT_SMI_ARG_CHECKED(type_arg, 0);
   Deoptimizer::BailoutType type =
       static_cast<Deoptimizer::BailoutType>(type_arg);
   Deoptimizer* deoptimizer = Deoptimizer::Grab(isolate);
   DCHECK(AllowHeapAllocation::IsAllowed());
   TimerEventScope<TimerEventDeoptimizeCode> timer(isolate);
   TRACE_EVENT0("v8", "V8.DeoptimizeCode");
 
   Handle<JSFunction> function = deoptimizer->function();
   Handle<Code> optimized_code = deoptimizer->compiled_code();
@@ skipping 121 matching lines @@
   bytecode->set_osr_loop_nesting_level(0);
 
   // Return a BailoutId representing the bytecode offset of the back branch.
   return BailoutId(iframe->GetBytecodeOffset());
 }
 
 }  // namespace
 
 RUNTIME_FUNCTION(Runtime_CompileForOnStackReplacement) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 1);
+  DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
 
   // We're not prepared to handle a function with arguments object.
   DCHECK(!function->shared()->uses_arguments());
 
   // Only reachable when OST is enabled.
   CHECK(FLAG_use_osr);
 
   // Determine frame triggering OSR request.
   JavaScriptFrameIterator it(isolate);
@@ skipping 64 matching lines @@
 
   if (!function->IsOptimized()) {
     function->ReplaceCode(function->shared()->code());
   }
   return NULL;
 }
 
 
 RUNTIME_FUNCTION(Runtime_TryInstallOptimizedCode) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 1);
+  DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
 
   // First check if this is a real stack overflow.
   StackLimitCheck check(isolate);
   if (check.JsHasOverflowed()) {
     SealHandleScope shs(isolate);
     return isolate->StackOverflow();
   }
 
   isolate->optimizing_compile_dispatcher()->InstallOptimizedFunctions();
@@ skipping 46 matching lines @@
       isolate, compiled, Compiler::GetFunctionFromEval(
                              source, outer_info, context, language_mode,
                              restriction, eval_scope_position, eval_position),
       isolate->heap()->exception());
   return *compiled;
 }
 
 
 RUNTIME_FUNCTION(Runtime_ResolvePossiblyDirectEval) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 6);
+  DCHECK_EQ(6, args.length());
 
   Handle<Object> callee = args.at(0);
 
   // If "eval" didn't refer to the original GlobalEval, it's not a
   // direct call to eval.
   // (And even if it is, but the first argument isn't a string, just let
   // execution default to an indirect call to eval, which will also return
   // the first argument without doing anything).
   if (*callee != isolate->native_context()->global_eval_fun() ||
       !args[1]->IsString()) {
     return *callee;
   }
 
   DCHECK(args[3]->IsSmi());
   DCHECK(is_valid_language_mode(args.smi_at(3)));
   LanguageMode language_mode = static_cast<LanguageMode>(args.smi_at(3));
   DCHECK(args[4]->IsSmi());
   Handle<SharedFunctionInfo> outer_info(args.at<JSFunction>(2)->shared(),
                                         isolate);
   return CompileGlobalEval(isolate, args.at<String>(1), outer_info,
                            language_mode, args.smi_at(4), args.smi_at(5));
 }
 }  // namespace internal
 }  // namespace v8