Extract interceptor calls from raw is-checks.

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

Index: sdk/lib/_internal/compiler/implementation/ssa/builder.dart
diff --git a/sdk/lib/_internal/compiler/implementation/ssa/builder.dart b/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
index df84dd6eb988818874c81c3ecc24831df0cbe913..7c7ff1752060dbe4924fa351b428590e23ca7366 100644
--- a/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
+++ b/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
@@ -31,52 +31,54 @@ class SsaBuilderTask extends CompilerTask {
   HGraph build(CodegenWorkItem work) {
     return measure(() {
       Element element = work.element.implementation;
-      HInstruction.idCounter = 0;
-      ConstantSystem constantSystem = compiler.backend.constantSystem;
-      SsaBuilder builder = new SsaBuilder(constantSystem, this, work);
-      HGraph graph;
-      ElementKind kind = element.kind;
-      if (kind == ElementKind.GENERATIVE_CONSTRUCTOR) {
-        graph = compileConstructor(builder, work);
-      } else if (kind == ElementKind.GENERATIVE_CONSTRUCTOR_BODY ||
-                 kind == ElementKind.FUNCTION ||
-                 kind == ElementKind.GETTER ||
-                 kind == ElementKind.SETTER) {
-        graph = builder.buildMethod(element);
-      } else if (kind == ElementKind.FIELD) {
-        assert(!element.isInstanceMember());
-        graph = builder.buildLazyInitializer(element);
-      } else {
-        compiler.internalErrorOnElement(element,
-                                        'unexpected element kind $kind');
-      }
-      assert(graph.isValid());
-      if (!identical(kind, ElementKind.FIELD)) {
-        FunctionElement function = element;
-        FunctionSignature signature = function.computeSignature(compiler);
-        signature.forEachOptionalParameter((Element parameter) {
-          // This ensures the default value will be computed.
-          builder.compileVariable(parameter);
-        });
-      }
+      return compiler.withCurrentElement(element, () {
+        HInstruction.idCounter = 0;
+        ConstantSystem constantSystem = compiler.backend.constantSystem;
+        SsaBuilder builder = new SsaBuilder(constantSystem, this, work);
+        HGraph graph;
+        ElementKind kind = element.kind;
+        if (kind == ElementKind.GENERATIVE_CONSTRUCTOR) {
+          graph = compileConstructor(builder, work);
+        } else if (kind == ElementKind.GENERATIVE_CONSTRUCTOR_BODY ||
+                   kind == ElementKind.FUNCTION ||
+                   kind == ElementKind.GETTER ||
+                   kind == ElementKind.SETTER) {
+          graph = builder.buildMethod(element);
+        } else if (kind == ElementKind.FIELD) {
+          assert(!element.isInstanceMember());
+          graph = builder.buildLazyInitializer(element);
+        } else {
+          compiler.internalErrorOnElement(element,
+                                          'unexpected element kind $kind');
+        }
+        assert(graph.isValid());
+        if (!identical(kind, ElementKind.FIELD)) {
+          FunctionElement function = element;
+          FunctionSignature signature = function.computeSignature(compiler);
+          signature.forEachOptionalParameter((Element parameter) {
+            // This ensures the default value will be computed.
+            builder.compileVariable(parameter);
+          });
+        }
 
-      if (compiler.tracer.enabled) {
-        String name;
-        if (element.isMember()) {
-          String className = element.getEnclosingClass().name.slowToString();
-          String memberName = element.name.slowToString();
-          name = "$className.$memberName";
-          if (element.isGenerativeConstructorBody()) {
-            name = "$name (body)";
+        if (compiler.tracer.enabled) {
+          String name;
+          if (element.isMember()) {
+            String className = element.getEnclosingClass().name.slowToString();
+            String memberName = element.name.slowToString();
+            name = "$className.$memberName";
+            if (element.isGenerativeConstructorBody()) {
+              name = "$name (body)";
+            }
+          } else {
+            name = "${element.name.slowToString()}";
           }
-        } else {
-          name = "${element.name.slowToString()}";
+          compiler.tracer.traceCompilation(
+              name, work.compilationContext, compiler);
+          compiler.tracer.traceGraph('builder', graph);
         }
-        compiler.tracer.traceCompilation(
-            name, work.compilationContext, compiler);
-        compiler.tracer.traceGraph('builder', graph);
-      }
-      return graph;
+        return graph;
+      });
     });
   }
 
@@ -2798,7 +2800,7 @@ class SsaBuilder extends ResolvedVisitor implements Visitor {
     type = type.unalias(compiler);
     if (type.kind == TypeKind.FUNCTION) {
       if (backend.rti.isSimpleFunctionType(type)) {
-        return new HIs(type, <HInstruction>[expression], HIs.RAW_CHECK);
+        return new HIs.raw(type, expression, invokeInterceptor(expression));
       }
       Element checkFunctionSubtype = backend.getCheckFunctionSubtype();
 
@@ -2835,16 +2837,14 @@ class SsaBuilder extends ResolvedVisitor implements Visitor {
                                                  typeArguments];
       pushInvokeStatic(node, checkFunctionSubtype, inputs, HType.BOOLEAN);
       HInstruction call = pop();
-      return new HIs(type, <HInstruction>[expression, call],
-          HIs.COMPOUND_CHECK);
+      return new HIs.compound(type, expression, call);
     } else if (type.kind == TypeKind.TYPE_VARIABLE) {
       HInstruction runtimeType = addTypeVariableReference(type);
       Element helper = backend.getCheckSubtypeOfRuntimeType();
       List<HInstruction> inputs = <HInstruction>[expression, runtimeType];
       pushInvokeStatic(null, helper, inputs, HType.BOOLEAN);
       HInstruction call = pop();
-      return new HIs(type, <HInstruction>[expression, call],
-                     HIs.VARIABLE_CHECK);
+      return new HIs.variable(type, expression, call);
     } else if (RuntimeTypes.hasTypeArguments(type)) {
       ClassElement element = type.element;
       Element helper = backend.getCheckSubtype();
@@ -2863,10 +2863,12 @@ class SsaBuilder extends ResolvedVisitor implements Visitor {
                                                  asFieldName];
       pushInvokeStatic(node, helper, inputs, HType.BOOLEAN);
       HInstruction call = pop();
-      return
-          new HIs(type, <HInstruction>[expression, call], HIs.COMPOUND_CHECK);
+      return new HIs.compound(type, expression, call);
     } else {
-      return new HIs(type, <HInstruction>[expression], HIs.RAW_CHECK);
+      if (backend.hasDirectCheckFor(type)) {
+        return new HIs.direct(type, expression);
+      }
+      return new HIs.raw(type, expression, invokeInterceptor(expression));
     }
   }
 
@@ -4902,10 +4904,8 @@ class SsaBuilder extends ResolvedVisitor implements Visitor {
           if (type == null) {
             compiler.internalError('On with no type', node: catchBlock.type);
           }
-          // TODO(karlkose): support type arguments here.
-          HInstruction condition = new HIs(type,
-                                           <HInstruction>[unwrappedException],
-                                           HIs.RAW_CHECK);
+          HInstruction condition =
+              buildIsNode(catchBlock.type, type, unwrappedException);
           push(condition);
         } else {
           VariableDefinitions declaration = catchBlock.formals.nodes.head;
@@ -4922,9 +4922,7 @@ class SsaBuilder extends ResolvedVisitor implements Visitor {
             if (type == null) {
               compiler.cancel('Catch with unresolved type', node: catchBlock);
             }
-            // TODO(karlkose): support type arguments here.
-            condition = new HIs(type, <HInstruction>[unwrappedException],
-                                HIs.RAW_CHECK);
+            condition = buildIsNode(declaration.type, type, unwrappedException);
             push(condition);
           }
         }