Revert r15265 due to checked mode failures.

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

Index: sdk/lib/_internal/compiler/implementation/ssa/optimize.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/ssa/optimize.dart	(revision 15268)
+++ sdk/lib/_internal/compiler/implementation/ssa/optimize.dart	(working copy)
@@ -211,22 +211,6 @@
         && node.selector.name == const SourceString('toString')) {
       return node.inputs[1];
     }
-    // Check if this call does not need to be intercepted.
-    HType type = types[input];
-    var interceptor = node.inputs[0];
-    if (node is HInvokeDynamicMethod
-        && interceptor is !HThis
-        && !type.canBePrimitive()) {
-      // If the type can be null, and the intercepted method can be in
-      // the object class, keep the interceptor.
-      if (type.canBeNull()
-          && interceptor.interceptedClasses.contains(compiler.objectClass)) {
-        return node;
-      }
-      // Change the call to a regular invoke dynamic call.
-      return new HInvokeDynamicMethod(
-          node.selector, node.inputs.getRange(1, node.inputs.length - 1));
-    }
     return node;
   }
 
@@ -266,8 +250,8 @@
     return node;
   }
 
-  HInstruction fromNativeToDynamicInvocation(HInvokeStatic node,
-                                             Selector selector) {
+  HInstruction fromInterceptorToDynamicInvocation(HInvokeStatic node,
+                                                  Selector selector) {
     HBoundedType type = types[node.inputs[1]];
     HInvokeDynamicMethod result = new HInvokeDynamicMethod(
         selector,
@@ -297,7 +281,7 @@
   HInstruction visitIndex(HIndex node) {
     if (!node.receiver.canBePrimitive(types)) {
       Selector selector = new Selector.index();
-      return fromNativeToDynamicInvocation(node, selector);
+      return fromInterceptorToDynamicInvocation(node, selector);
     }
     return node;
   }
@@ -305,7 +289,7 @@
   HInstruction visitIndexAssign(HIndexAssign node) {
     if (!node.receiver.canBePrimitive(types)) {
       Selector selector = new Selector.indexSet();
-      return fromNativeToDynamicInvocation(node, selector);
+      return fromInterceptorToDynamicInvocation(node, selector);
     }
     return node;
   }
@@ -326,7 +310,7 @@
         // The equals operation is being optimized in visitEquals.
         && node is! HEquals) {
       Selector selector = new Selector.binaryOperator(operation.name);
-      return fromNativeToDynamicInvocation(node, selector);
+      return fromInterceptorToDynamicInvocation(node, selector);
     }
     return node;
   }
@@ -672,38 +656,6 @@
     }
     return graph.addConstant(constantSystem.createString(folded, node.node));
   }
-
-  HInstruction visitInterceptor(HInterceptor node) {
-    if (node.isConstant()) return node;
-    HType type = types[node.inputs[0]];
-    Element constantInterceptor;
-    if (type.isInteger()) {
-      constantInterceptor = backend.intInterceptor;
-    } else if (type.isDouble()) {
-      constantInterceptor = backend.doubleInterceptor;
-    } else if (type.isBoolean()) {
-      constantInterceptor = backend.boolInterceptor;
-    } else if (type.isString()) {
-      constantInterceptor = backend.stringInterceptor;
-    } else if (type.isArray()) {
-      constantInterceptor = backend.arrayInterceptor;
-    } else if (type.isNull()) {
-      constantInterceptor = backend.nullInterceptor;
-    } else if (type.isNumber()) {
-      Set<ClassElement> intercepted = node.interceptedClasses;
-      // If the method being intercepted is not defined in [int] or
-      // [double] we can safely use the number interceptor.
-      if (!intercepted.contains(compiler.intClass)
-          && !intercepted.contains(compiler.doubleClass)) {
-        constantInterceptor = backend.numberInterceptor;
-      }
-    }
-
-    if (constantInterceptor == null) return node;
-
-    ConstantHandler handler = compiler.constantHandler;
-    return graph.addConstant(handler.compileVariable(constantInterceptor));
-  }
 }
 
 class SsaCheckInserter extends HBaseVisitor implements OptimizationPhase {