Revert "Load global object and builtins from activation."

This reverts commit r23205.

Setting string-type flags in unit tests is not a good idea.

TBR=titzer@chromium.org

Review URL: https://codereview.chromium.org/489543002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23208 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/compiler/ast-graph-builder.cc

@@ -6,7 +6,6 @@
 
 #include "src/compiler.h"
 #include "src/compiler/control-builders.h"
-#include "src/compiler/machine-operator.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/node-properties-inl.h"
 #include "src/full-codegen.h"
@@ -738,12 +737,13 @@ void AstGraphBuilder::VisitForInStatement(ForInStatement* stmt) {
           test_should_filter.If(should_filter_cond);
           test_should_filter.Then();
           value = environment()->Pop();
-          Node* builtins = BuildLoadBuiltinsObject();
-          Node* function = BuildLoadObjectField(
-              builtins,
-              JSBuiltinsObject::OffsetOfFunctionWithId(Builtins::FILTER_KEY));
+          // TODO(dcarney): Better load from function context.
+          // See comment in BuildLoadBuiltinsObject.
+          Handle<JSFunction> function(JSFunction::cast(
+              info()->context()->builtins()->javascript_builtin(
+                  Builtins::FILTER_KEY)));
           // Callee.
-          environment()->Push(function);
+          environment()->Push(jsgraph()->HeapConstant(function));
           // Receiver.
           environment()->Push(obj);
           // Args.
@@ -875,11 +875,10 @@ void AstGraphBuilder::VisitLiteral(Literal* expr) {
 
 
 void AstGraphBuilder::VisitRegExpLiteral(RegExpLiteral* expr) {
-  Node* closure = GetFunctionClosure();
+  Handle<JSFunction> closure = info()->closure();
 
   // Create node to materialize a regular expression literal.
-  Node* literals_array =
-      BuildLoadObjectField(closure, JSFunction::kLiteralsOffset);
+  Node* literals_array = jsgraph()->Constant(handle(closure->literals()));
   Node* literal_index = jsgraph()->Constant(expr->literal_index());
   Node* pattern = jsgraph()->Constant(expr->pattern());
   Node* flags = jsgraph()->Constant(expr->flags());
@@ -890,12 +889,11 @@ void AstGraphBuilder::VisitRegExpLiteral(RegExpLiteral* expr) {
 
 
 void AstGraphBuilder::VisitObjectLiteral(ObjectLiteral* expr) {
-  Node* closure = GetFunctionClosure();
+  Handle<JSFunction> closure = info()->closure();
 
   // Create node to deep-copy the literal boilerplate.
   expr->BuildConstantProperties(isolate());
-  Node* literals_array =
-      BuildLoadObjectField(closure, JSFunction::kLiteralsOffset);
+  Node* literals_array = jsgraph()->Constant(handle(closure->literals()));
   Node* literal_index = jsgraph()->Constant(expr->literal_index());
   Node* constants = jsgraph()->Constant(expr->constant_properties());
   Node* flags = jsgraph()->Constant(expr->ComputeFlags());
@@ -1000,12 +998,11 @@ void AstGraphBuilder::VisitObjectLiteral(ObjectLiteral* expr) {
 
 
 void AstGraphBuilder::VisitArrayLiteral(ArrayLiteral* expr) {
-  Node* closure = GetFunctionClosure();
+  Handle<JSFunction> closure = info()->closure();
 
   // Create node to deep-copy the literal boilerplate.
   expr->BuildConstantElements(isolate());
-  Node* literals_array =
-      BuildLoadObjectField(closure, JSFunction::kLiteralsOffset);
+  Node* literals_array = jsgraph()->Constant(handle(closure->literals()));
   Node* literal_index = jsgraph()->Constant(expr->literal_index());
   Node* constants = jsgraph()->Constant(expr->constant_elements());
   Node* flags = jsgraph()->Constant(expr->ComputeFlags());
@@ -1941,28 +1938,25 @@ Node* AstGraphBuilder::BuildVariableAssignment(Variable* variable, Node* value,
 }
 
 
-Node* AstGraphBuilder::BuildLoadObjectField(Node* object, int offset) {
-  // TODO(sigurds) Use simplified load here once it is ready.
-  MachineOperatorBuilder machine(zone());
-  Node* field_load = NewNode(machine.Load(kMachAnyTagged), object,
-                             jsgraph_->Int32Constant(offset - kHeapObjectTag));
-  return field_load;
-}
-
-
 Node* AstGraphBuilder::BuildLoadBuiltinsObject() {
-  Node* global = BuildLoadGlobalObject();
-  Node* builtins =
-      BuildLoadObjectField(global, JSGlobalObject::kBuiltinsOffset);
-  return builtins;
+  // TODO(mstarzinger): Better load from function context, otherwise optimized
+  // code cannot be shared across native contexts.
+  return jsgraph()->Constant(handle(info()->context()->builtins()));
 }
 
 
 Node* AstGraphBuilder::BuildLoadGlobalObject() {
+#if 0
   Node* context = GetFunctionContext();
-  Operator* load_op =
-      javascript()->LoadContext(0, Context::GLOBAL_OBJECT_INDEX, true);
-  return NewNode(load_op, context);
+  // TODO(mstarzinger): Use mid-level operator on FixedArray instead of the
+  // JS-level operator that targets JSObject.
+  Node* index = jsgraph()->Constant(Context::GLOBAL_OBJECT_INDEX);
+  return NewNode(javascript()->LoadProperty(), context, index);
+#else
+  // TODO(mstarzinger): Better load from function context, otherwise optimized
+  // code cannot be shared across native contexts. See unused code above.
+  return jsgraph()->Constant(handle(info()->context()->global_object()));
+#endif
 }
 
 

src/compiler/ast-graph-builder.h

@@ -88,7 +88,6 @@ class AstGraphBuilder : public StructuredGraphBuilder, public AstVisitor {
   Node* BuildLoadBuiltinsObject();
   Node* BuildLoadGlobalObject();
   Node* BuildLoadClosure();
-  Node* BuildLoadObjectField(Node* object, int offset);
 
   // Builders for automatic type conversion.
   Node* BuildToBoolean(Node* value);

test/cctest/compiler/test-run-jscalls.cc

@@ -245,88 +245,3 @@ TEST(CallEval) {
 
   T.CheckCall(T.Val(42), T.Val("x"), T.undefined());
 }
-
-#if V8_TURBOFAN_TARGET
-
-TEST(ContextLoadedFromActivation) {
-  i::FLAG_turbo_filter = "*";
-  i::FLAG_always_opt = true;
-  i::FLAG_context_specialization = false;
-
-  const char* script =
-      "var x = 42;"
-      "(function() {"
-      "  return function () { return x };"
-      "})()";
-
-  v8::Isolate* isolate = CcTest::isolate();
-  v8::HandleScope outer(isolate);
-  v8::Local<v8::Value> fun;
-  {
-    v8::Local<v8::Context> env = v8::Context::New(isolate);
-    env->Enter();
-    CompileRun("var x = 42;");
-    fun = CompileRun(script);
-    env->Global()->Set(v8_str("foo"), fun);
-    ExpectInt32("foo();", 42);
-    env->Exit();
-  }
-
-  {
-    v8::Local<v8::Context> env = v8::Context::New(isolate);
-    env->Enter();
-    v8::Local<v8::Value> fun2 = CompileRun(script);
-    i::Handle<i::Object> oifun = v8::Utils::OpenHandle(*fun);
-    i::Handle<i::JSFunction> ifun = Handle<JSFunction>::cast(oifun);
-    i::Handle<i::Object> oifun2 = v8::Utils::OpenHandle(*fun2);
-    i::Handle<i::JSFunction> ifun2 = Handle<JSFunction>::cast(oifun2);
-    ifun2->set_code(ifun->code());
-    env->Global()->Set(v8_str("foo"), fun2);
-    CompileRun("var x = 24;");
-    ExpectInt32("foo();", 24);
-    env->Exit();
-  }
-}
-
-
-TEST(BuiltinLoadedFromActivation) {
-  i::FLAG_turbo_filter = "*";
-  i::FLAG_always_opt = true;
-  i::FLAG_context_specialization = false;
-
-  const char* script =
-      "var x = 42;"
-      "(function() {"
-      "  return function () { return this; };"
-      "})()";
-
-  v8::Isolate* isolate = CcTest::isolate();
-  v8::HandleScope outer(isolate);
-  v8::Local<v8::Value> fun;
-  {
-    v8::Local<v8::Context> env = v8::Context::New(isolate);
-    env->Enter();
-    CompileRun("var x = 42;");
-    fun = CompileRun(script);
-    env->Global()->Set(v8_str("foo"), fun);
-    ExpectObject("foo()", env->Global());
-    env->Exit();
-  }
-
-  {
-    v8::Local<v8::Context> env = v8::Context::New(isolate);
-    env->Enter();
-    v8::Local<v8::Value> fun2 = CompileRun(script);
-    i::Handle<i::Object> oifun = v8::Utils::OpenHandle(*fun);
-    i::Handle<i::JSFunction> ifun = Handle<JSFunction>::cast(oifun);
-    i::Handle<i::Object> oifun2 = v8::Utils::OpenHandle(*fun2);
-    i::Handle<i::JSFunction> ifun2 = Handle<JSFunction>::cast(oifun2);
-    ifun2->set_code(ifun->code());
-    env->Global()->Set(v8_str("foo"), fun2);
-    CompileRun("var x = 24;");
-    ExpectObject("foo()", env->Global());
-    env->Exit();
-  }
-}
-
-#endif  // V8_TURBO_TARGET