Enable full type-checks in checked mode.

sdk/lib/_internal/compiler/implementation/ssa/nodes.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;
 
 abstract class HVisitor<R> {
   R visitAdd(HAdd node);
   R visitBailoutTarget(HBailoutTarget node);
   R visitBitAnd(HBitAnd node);
@@ skipping 2159 matching lines @@
     setChangesIndex();
   }
   String toString() => 'index assign operator';
   accept(HVisitor visitor) => visitor.visitIndexAssign(this);
 
   HInstruction get receiver => inputs[0];
   HInstruction get index => inputs[1];
   HInstruction get value => inputs[2];
 }
 
-// TODO(karlklose): use this class to represent type conversions as well.
 class HIs extends HInstruction {
   /// A check against a raw type: 'o is int', 'o is A'.
   static const int RAW_CHECK = 0;
   /// A check against a type with type arguments: 'o is List<int>', 'o is C<T>'.
   static const int COMPOUND_CHECK = 1;
   /// A check against a single type variable: 'o is T'.
   static const int VARIABLE_CHECK = 2;
+  /// A checked-mode check against a raw type.
+  static const int RAW_ASSERT = 3;
 
   final DartType typeExpression;
   final bool nullOk;
   final int kind;
+  final bool isCheckedModeTest;
 
   HIs(this.typeExpression, List<HInstruction> inputs, this.kind,
-      {this.nullOk: false}) : super(inputs) {
-    assert(kind >= RAW_CHECK && kind <= VARIABLE_CHECK);
-    setUseGvn();
-    instructionType = HType.BOOLEAN;
+      this.isCheckedModeTest, HType instructionType, {this.nullOk: false})
+      : super(inputs) {
+    assert(kind >= RAW_CHECK && kind <= RAW_ASSERT);
+    assert(isCheckedModeTest || instructionType == HType.BOOLEAN);
+    assert(isCheckedModeTest || instructionType != RAW_ASSERT);
+    if (isCheckedModeTest) {
+      setAllSideEffects();
+    } else {
+      setUseGvn();
+    }
+    this.instructionType = instructionType;
   }
 
   HInstruction get expression => inputs[0];
 
   HInstruction get checkCall {
     assert(kind == VARIABLE_CHECK || kind == COMPOUND_CHECK);
     return inputs[1];
   }
 
+  bool canThrow() => isCheckedModeTest;
   bool get isRawCheck => kind == RAW_CHECK;
   bool get isVariableCheck => kind == VARIABLE_CHECK;
   bool get isCompoundCheck => kind == COMPOUND_CHECK;
 
   accept(HVisitor visitor) => visitor.visitIs(this);
 
   toString() => "$expression is $typeExpression";
 
   int typeCode() => HInstruction.IS_TYPECODE;
 
@@ skipping 421 matching lines @@
   HBasicBlock get start => expression.start;
   HBasicBlock get end {
     // We don't create a switch block if there are no cases.
     assert(!statements.isEmpty);
     return statements.last.end;
   }
 
   bool accept(HStatementInformationVisitor visitor) =>
       visitor.visitSwitchInfo(this);
 }