[turbofan] CheckBounds cannot be used within asm.js.

src/compiler/node-matchers.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_COMPILER_NODE_MATCHERS_H_
 #define V8_COMPILER_NODE_MATCHERS_H_
 
 #include <cmath>
 
 // TODO(turbofan): Move ExternalReference out of assembler.h
@@ skipping 149 matching lines @@
   }
   bool IsMinusZero() const {
     return this->Is(0.0) && std::signbit(this->Value());
   }
   bool IsNegative() const { return this->HasValue() && this->Value() < 0.0; }
   bool IsNaN() const { return this->HasValue() && std::isnan(this->Value()); }
   bool IsZero() const { return this->Is(0.0) && !std::signbit(this->Value()); }
   bool IsNormal() const {
     return this->HasValue() && std::isnormal(this->Value());
   }
+  bool IsInteger() const {
+    return this->HasValue() && std::nearbyint(this->Value()) == this->Value();
+  }
   bool IsPositiveOrNegativePowerOf2() const {
     if (!this->HasValue() || (this->Value() == 0.0)) {
       return false;
     }
     Double value = Double(this->Value());
     return !value.IsInfinite() &&
            base::bits::IsPowerOfTwo64(value.Significand());
   }
 };
 
@@ skipping 519 matching lines @@
   Node* branch_;
   Node* if_true_;
   Node* if_false_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_NODE_MATCHERS_H_