kernel -> ssa: support static invocations and variable gets

pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart

 // Copyright (c) 2016, 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.
 
 import 'package:kernel/ast.dart' as ir;
 
 import '../constants/values.dart';
 import '../diagnostics/invariant.dart';
 import '../elements/elements.dart';
 import '../js_backend/js_backend.dart';
 import '../tree/tree.dart' as ast;
+import '../types/masks.dart';
+import '../universe/side_effects.dart';
+
+import 'types.dart';
 
 /// A helper class that abstracts all accesses of the AST from Kernel nodes.
 ///
 /// The goal is to remove all need for the AST from the Kernel SSA builder.
 class KernelAstAdapter {
-  final JavaScriptBackend backend;
-  final ResolvedAst resolvedAst;
-  final Map<ir.Node, ast.Node> nodeToAst;
+  final JavaScriptBackend _backend;
+  final ResolvedAst _resolvedAst;
+  final Map<ir.Node, ast.Node> _nodeToAst;
+  final Map<ir.Node, Element> _nodeToElement;
 
-  KernelAstAdapter(this.backend, this.resolvedAst, this.nodeToAst);
+  KernelAstAdapter(this._backend, this._resolvedAst, this._nodeToAst,
+      this._nodeToElement, Map<FunctionElement, ir.Member> functions) {
+    for (FunctionElement functionElement in functions.keys) {
+      _nodeToElement[functions[functionElement]] = functionElement;
+    }
+  }
 
-  ConstantValue getConstantFor(ir.Node node) {
-    ast.Node astNode = nodeToAst[node];
-    ConstantValue constantValue = backend.constants
-        .getConstantValueForNode(astNode, resolvedAst.elements);
+  ConstantValue getConstantForSymbol(ir.SymbolLiteral node) {
+    ast.Node astNode = _nodeToAst[node];
+    ConstantValue constantValue = _backend.constants
+        .getConstantValueForNode(astNode, _resolvedAst.elements);
     assert(invariant(astNode, constantValue != null,
         message: 'No constant computed for $node'));
     return constantValue;
   }
+
+  Element getElement(ir.Node node) {
+    Element result = _nodeToElement[node];
+    assert(result != null);
+    return result;
+  }
+
+  bool getCanThrow(ir.Procedure procedure) {
+    FunctionElement function = getElement(procedure);
+    return !_backend.compiler.world.getCannotThrow(function);
+  }
+
+  TypeMask returnTypeOf(ir.Procedure node) {
+    return TypeMaskFactory.inferredReturnTypeForElement(
+        getElement(node), _backend.compiler);
+  }
+
+  SideEffects getSideEffects(ir.Node node) {
+    return _backend.compiler.world.getSideEffectsOfElement(getElement(node));
+  }
 }