Implement dynamic function checks.

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

Index: dart/sdk/lib/_internal/compiler/implementation/ssa/nodes.dart
diff --git a/dart/sdk/lib/_internal/compiler/implementation/ssa/nodes.dart b/dart/sdk/lib/_internal/compiler/implementation/ssa/nodes.dart
index e13b16dc249f452ded8a400df2e156c97cc2f8f3..736ced4786c18ffb43ae58d182b3d758f36e8574 100644
--- a/dart/sdk/lib/_internal/compiler/implementation/ssa/nodes.dart
+++ b/dart/sdk/lib/_internal/compiler/implementation/ssa/nodes.dart
@@ -68,6 +68,11 @@ abstract class HVisitor<R> {
   R visitTry(HTry node);
   R visitTypeConversion(HTypeConversion node);
   R visitTypeKnown(HTypeKnown node);
+  R visitReadTypeVariable(HReadTypeVariable node);
+  R visitFunctionType(HFunctionType node);
+  R visitVoidType(HVoidType node);
+  R visitInterfaceType(HInterfaceType node);
+  R visitDynamicType(HDynamicType node);
 }
 
 abstract class HGraphVisitor {
@@ -330,6 +335,11 @@ class HBaseVisitor extends HGraphVisitor implements HVisitor {
   visitIs(HIs node) => visitInstruction(node);
   visitTypeConversion(HTypeConversion node) => visitCheck(node);
   visitTypeKnown(HTypeKnown node) => visitCheck(node);
+  visitReadTypeVariable(HReadTypeVariable node) => visitInstruction(node);
+  visitFunctionType(HFunctionType node) => visitInstruction(node);
+  visitVoidType(HVoidType node) => visitInstruction(node);
+  visitInterfaceType(HInterfaceType node) => visitInstruction(node);
+  visitDynamicType(HDynamicType node) => visitInstruction(node);
 }
 
 class SubGraph {
@@ -783,6 +793,11 @@ abstract class HInstruction implements Spannable {
   static const int IS_TYPECODE = 28;
   static const int INVOKE_DYNAMIC_TYPECODE = 29;
   static const int SHIFT_RIGHT_TYPECODE = 30;
+  static const int READ_TYPE_VARIABLE_TYPECODE = 31;
+  static const int FUNCTION_TYPE_TYPECODE = 32;
+  static const int VOID_TYPE_TYPECODE = 33;
+  static const int INTERFACE_TYPE_TYPECODE = 34;
+  static const int DYNAMIC_TYPE_TYPECODE = 35;
 
   HInstruction(this.inputs, this.instructionType)
       : id = idCounter++, usedBy = <HInstruction>[] {
@@ -966,7 +981,7 @@ abstract class HInstruction implements Spannable {
   }
 
   /**
-   * Type of the unstruction.
+   * Type of the instruction.
    */
   TypeMask instructionType;
 
@@ -2747,8 +2762,6 @@ class HTryBlockInformation implements HStatementInformation {
     visitor.visitTryInfo(this);
 }
 
-
-
 class HSwitchBlockInformation implements HStatementInformation {
   final HExpressionInformation expression;
   final List<HStatementInformation> statements;
@@ -2770,3 +2783,111 @@ class HSwitchBlockInformation implements HStatementInformation {
   bool accept(HStatementInformationVisitor visitor) =>
       visitor.visitSwitchInfo(this);
 }
+
+class HReadTypeVariable extends HInstruction {
+  /// The type variable being read.
+  final TypeVariableType dartType;
+
+  final bool hasReceiver;
+
+  HReadTypeVariable(this.dartType,
+                    HInstruction receiver,
+                    TypeMask instructionType)
+      : hasReceiver = true,
+        super(<HInstruction>[receiver], instructionType) {
+    setUseGvn();
+  }
+
+  HReadTypeVariable.noReceiver(this.dartType,
+                               HInstruction typeArgument,
+                               TypeMask instructionType)
+      : hasReceiver = false,
+        super(<HInstruction>[typeArgument], instructionType) {
+    setUseGvn();
+  }
+
+  accept(HVisitor visitor) => visitor.visitReadTypeVariable(this);
+
+  bool canThrow() => false;
+
+  int typeCode() => HInstruction.READ_TYPE_VARIABLE_TYPECODE;
+  bool typeEquals(HInstruction other) => other is HReadTypeVariable;
+
+  bool dataEquals(HReadTypeVariable other) {
+    return dartType.element == other.dartType.element
+        && hasReceiver == other.hasReceiver;
+  }
+}
+
+abstract class HRuntimeType extends HInstruction {
+  final DartType dartType;
+
+  HRuntimeType(List<HInstruction> inputs,
+               this.dartType,
+               TypeMask instructionType)
+      : super(inputs, instructionType) {
+    setUseGvn();
+  }
+
+  bool canThrow() => false;
+
+  int typeCode() {
+    throw 'abstract method';
+  }
+
+  bool typeEquals(HInstruction other) {
+    throw 'abstract method';
+  }
+
+  bool dataEquals(HRuntimeType other) {
+    return dartType == other.dartType;
+  }
+}
+
+class HFunctionType extends HRuntimeType {
+  HFunctionType(List<HInstruction> inputs,
+                FunctionType dartType,
+                TypeMask instructionType)
+      : super(inputs, dartType, instructionType);
+
+  accept(HVisitor visitor) => visitor.visitFunctionType(this);
+
+  int typeCode() => HInstruction.FUNCTION_TYPE_TYPECODE;
+
+  bool typeEquals(HInstruction other) => other is HFunctionType;
+}
+
+class HVoidType extends HRuntimeType {
+  HVoidType(VoidType dartType, TypeMask instructionType)
+      : super(const <HInstruction>[], dartType, instructionType);
+
+  accept(HVisitor visitor) => visitor.visitVoidType(this);
+
+  int typeCode() => HInstruction.VOID_TYPE_TYPECODE;
+
+  bool typeEquals(HInstruction other) => other is HVoidType;
+}
+
+class HInterfaceType extends HRuntimeType {
+  HInterfaceType(List<HInstruction> inputs,
+                 InterfaceType dartType,
+                 TypeMask instructionType)
+      : super(inputs, dartType, instructionType);
+
+  accept(HVisitor visitor) => visitor.visitInterfaceType(this);
+
+  int typeCode() => HInstruction.INTERFACE_TYPE_TYPECODE;
+
+  bool typeEquals(HInstruction other) => other is HInterfaceType;
+}
+
+class HDynamicType extends HRuntimeType {
+  HDynamicType(DynamicType dartType, TypeMask instructionType)
+      : super(const <HInstruction>[], dartType, instructionType);
+
+  accept(HVisitor visitor) => visitor.visitDynamicType(this);
+
+  int typeCode() => HInstruction.DYNAMIC_TYPE_TYPECODE;
+
+  bool typeEquals(HInstruction other) => other is HDynamicType;
+}