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

src/compiler/node-matchers.h

Index: src/compiler/node-matchers.h
diff --git a/src/compiler/node-matchers.h b/src/compiler/node-matchers.h
index 2d8ec0005d596d5f8506c7c5ed71a7b0423f3522..c317fdd5e7b5edd17f0fc0be056062034d47f6e1 100644
--- a/src/compiler/node-matchers.h
+++ b/src/compiler/node-matchers.h
@@ -167,6 +167,9 @@ struct FloatMatcher final : public ValueMatcher<T, kOpcode> {
   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;