- Trust type annotations on fields of HTML classes.

sdk/lib/_internal/compiler/implementation/ssa/codegen.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of ssa;
 
 class SsaCodeGeneratorTask extends CompilerTask {
 
   final JavaScriptBackend backend;
 
@@ skipping 1510 matching lines @@
         } else if (target == backend.jsArrayRemoveLast) {
           methodName = 'pop';
         } else if (target == backend.jsStringSplit) {
           methodName = 'split';
           // Split returns a List, so we make sure the backend knows the
           // list class is instantiated.
           world.registerInstantiatedClass(compiler.listClass);
         } else if (target == backend.jsStringConcat) {
           push(new js.Binary('+', object, arguments[0]), node);
           return;
+        } else if (target.isNative() && !compiler.enableTypeAssertions) {
+          // Enable direct calls to a native method only if we don't
+          // run in checked mode, where the Dart version may have
+          // type annotations on parameters and return type that it
+          // should check.
+          // Also check that the parameters are not functions: it's
+          // the callee that will translate them to JS functions.
+          bool canInlineNativeCall = true;
+          target.computeSignature(compiler).forEachParameter((Element element) {
+            DartType type = element.computeType(compiler).unalias(compiler);
+            if (type is FunctionType) {
+              canInlineNativeCall = false;
+            }
+          });
+          if (canInlineNativeCall) {
+            methodName = target.fixedBackendName();
+          }
         }
       }
     }
 
     if (methodName == null) {
       methodName = backend.namer.invocationName(node.selector);
       registerMethodInvoke(node);
     }
     push(jsPropertyCall(object, methodName, arguments), node);
   }
@@ skipping 1448 matching lines @@
   if (leftType.canBeNull() && rightType.canBeNull()) {
     if (left.isConstantNull() || right.isConstantNull() ||
         (leftType.isPrimitive() && leftType == rightType)) {
       return '==';
     }
     return null;
   } else {
     return '===';
   }
 }