Add a pass for the fast compiler to label expression nodes....

src/data-flow.cc

Index: src/data-flow.cc
===================================================================
--- src/data-flow.cc	(revision 0)
+++ src/data-flow.cc	(revision 0)
@@ -0,0 +1,264 @@
+// Copyright 2010 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "v8.h"
+
+#include "data-flow.h"
+
+namespace v8 {
+namespace internal {
+
+
+void AstLabeler::Label(FunctionLiteral* fun) {
+  VisitStatements(fun->body());
+}
+
+
+void AstLabeler::VisitStatements(ZoneList<Statement*>* stmts) {
+  for (int i = 0, len = stmts->length(); i < len; i++) {
+    Visit(stmts->at(i));
+  }
+}
+
+
+void AstLabeler::VisitDeclarations(ZoneList<Declaration*>* decls) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitBlock(Block* stmt) {
+  VisitStatements(stmt->statements());
+}
+
+
+void AstLabeler::VisitExpressionStatement(
+    ExpressionStatement* stmt) {
+  Visit(stmt->expression());
+}
+
+
+void AstLabeler::VisitEmptyStatement(EmptyStatement* stmt) {
+  // Do nothing.
+}
+
+
+void AstLabeler::VisitIfStatement(IfStatement* stmt) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitContinueStatement(ContinueStatement* stmt) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitBreakStatement(BreakStatement* stmt) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitReturnStatement(ReturnStatement* stmt) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitWithEnterStatement(
+    WithEnterStatement* stmt) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitWithExitStatement(WithExitStatement* stmt) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitSwitchStatement(SwitchStatement* stmt) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitDoWhileStatement(DoWhileStatement* stmt) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitWhileStatement(WhileStatement* stmt) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitForStatement(ForStatement* stmt) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitForInStatement(ForInStatement* stmt) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitTryCatchStatement(TryCatchStatement* stmt) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitTryFinallyStatement(
+    TryFinallyStatement* stmt) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitDebuggerStatement(
+    DebuggerStatement* stmt) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitFunctionLiteral(FunctionLiteral* expr) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitFunctionBoilerplateLiteral(
+    FunctionBoilerplateLiteral* expr) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitConditional(Conditional* expr) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitSlot(Slot* expr) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitVariableProxy(VariableProxy* expr) {
+  expr->set_num(next_number_++);
+}
+
+
+void AstLabeler::VisitLiteral(Literal* expr) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitRegExpLiteral(RegExpLiteral* expr) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitObjectLiteral(ObjectLiteral* expr) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitArrayLiteral(ArrayLiteral* expr) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitCatchExtensionObject(
+    CatchExtensionObject* expr) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitAssignment(Assignment* expr) {
+  Property* prop = expr->target()->AsProperty();
+  ASSERT(prop != NULL);
+  if (prop != NULL) {
+    ASSERT(prop->key()->IsPropertyName());
+    if (prop->obj()->AsVariableProxy() == NULL ||
+        !prop->obj()->AsVariableProxy()->var()->is_this())
+      Visit(prop->obj());
+  }
+  Visit(expr->value());
+  expr->set_num(next_number_++);
+}
+
+
+void AstLabeler::VisitThrow(Throw* expr) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitProperty(Property* expr) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitCall(Call* expr) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitCallNew(CallNew* expr) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitCallRuntime(CallRuntime* expr) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitUnaryOperation(UnaryOperation* expr) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitCountOperation(CountOperation* expr) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitBinaryOperation(BinaryOperation* expr) {
+  Visit(expr->left());
+  Visit(expr->right());
+  expr->set_num(next_number_++);
+}
+
+
+void AstLabeler::VisitCompareOperation(CompareOperation* expr) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitThisFunction(ThisFunction* expr) {
+  UNREACHABLE();
+}
+
+
+void AstLabeler::VisitDeclaration(Declaration* decl) {
+  UNREACHABLE();
+}
+
+} }  // namespace v8::internal