Move dart2js from sdk/lib/_internal/compiler to pkg/compiler

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

-// Copyright (c) 2014, 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 native;
-
-final RegExp nativeRedirectionRegExp = new RegExp(r'^[a-zA-Z][a-zA-Z_$0-9]*$');
-
-void handleSsaNative(SsaBuilder builder, Expression nativeBody) {
-  Compiler compiler = builder.compiler;
-  FunctionElement element = builder.work.element;
-  NativeEmitter nativeEmitter = builder.nativeEmitter;
-  JavaScriptBackend backend = builder.backend;
-
-  HInstruction convertDartClosure(ParameterElement  parameter,
-                                  FunctionType type) {
-    HInstruction local = builder.localsHandler.readLocal(parameter);
-    ConstantValue arityConstant =
-        builder.constantSystem.createInt(type.computeArity());
-    HInstruction arity = builder.graph.addConstant(arityConstant, compiler);
-    // TODO(ngeoffray): For static methods, we could pass a method with a
-    // defined arity.
-    Element helper = backend.getClosureConverter();
-    builder.pushInvokeStatic(nativeBody, helper, [local, arity]);
-    HInstruction closure = builder.pop();
-    return closure;
-  }
-
-  // Check which pattern this native method follows:
-  // 1) foo() native;
-  //      hasBody = false
-  // 2) foo() native "bar";
-  //      No longer supported, this is now done with @JSName('foo') and case 1.
-  // 3) foo() native "return 42";
-  //      hasBody = true
-  bool hasBody = false;
-  assert(element.isNative);
-  String nativeMethodName = element.fixedBackendName;
-  if (nativeBody != null) {
-    LiteralString jsCode = nativeBody.asLiteralString();
-    String str = jsCode.dartString.slowToString();
-    if (nativeRedirectionRegExp.hasMatch(str)) {
-      compiler.internalError(
-          nativeBody, "Deprecated syntax, use @JSName('name') instead.");
-    }
-    hasBody = true;
-  }
-
-  if (!hasBody) {
-    nativeEmitter.nativeMethods.add(element);
-  }
-
-  FunctionSignature parameters = element.functionSignature;
-  if (!hasBody) {
-    List<String> arguments = <String>[];
-    List<HInstruction> inputs = <HInstruction>[];
-    String receiver = '';
-    if (element.isInstanceMember) {
-      receiver = '#.';
-      inputs.add(builder.localsHandler.readThis());
-    }
-    parameters.forEachParameter((ParameterElement parameter) {
-      DartType type = parameter.type.unalias(compiler);
-      HInstruction input = builder.localsHandler.readLocal(parameter);
-      if (type is FunctionType) {
-        // The parameter type is a function type either directly or through
-        // typedef(s).
-        input = convertDartClosure(parameter, type);
-      }
-      inputs.add(input);
-      arguments.add('#');
-    });
-
-    String foreignParameters = arguments.join(',');
-    String nativeMethodCall;
-    if (element.kind == ElementKind.FUNCTION) {
-      nativeMethodCall = '$receiver$nativeMethodName($foreignParameters)';
-    } else if (element.kind == ElementKind.GETTER) {
-      nativeMethodCall = '$receiver$nativeMethodName';
-    } else if (element.kind == ElementKind.SETTER) {
-      nativeMethodCall = '$receiver$nativeMethodName = $foreignParameters';
-    } else {
-      builder.compiler.internalError(element,
-                                     'Unexpected kind: "${element.kind}".');
-    }
-
-    builder.push(
-        new HForeign(
-            // TODO(sra): This could be cached.  The number of templates should
-            // be proportional to the number of native methods, which is bounded
-            // by the dart: libraries.
-            js.js.uncachedExpressionTemplate(nativeMethodCall),
-            backend.dynamicType,
-            inputs, effects: new SideEffects()));
-    builder.close(new HReturn(builder.pop())).addSuccessor(builder.graph.exit);
-  } else {
-    if (parameters.parameterCount != 0) {
-      compiler.internalError(nativeBody,
-          'native "..." syntax is restricted to '
-          'functions with zero parameters.');
-    }
-    LiteralString jsCode = nativeBody.asLiteralString();
-    builder.push(new HForeign.statement(
-        js.js.statementTemplateYielding(
-            new js.LiteralStatement(jsCode.dartString.slowToString())),
-        <HInstruction>[],
-        new SideEffects(),
-        null,
-        backend.dynamicType));
-  }
-}