Initial implementation of top-level compilation of expressions in test...

src/fast-codegen.h

Index: src/fast-codegen.h
===================================================================
--- src/fast-codegen.h	(revision 3181)
+++ src/fast-codegen.h	(working copy)
@@ -39,7 +39,12 @@
 class FastCodeGenerator: public AstVisitor {
  public:
   FastCodeGenerator(MacroAssembler* masm, Handle<Script> script, bool is_eval)
-    : masm_(masm), function_(NULL), script_(script), is_eval_(is_eval) {
+      : masm_(masm),
+        function_(NULL),
+        script_(script),
+        is_eval_(is_eval),
+        true_label_(NULL),
+        false_label_(NULL) {
   }
 
   static Handle<Code> MakeCode(FunctionLiteral* fun,
@@ -59,6 +64,10 @@
   // If destination is TOS, just overwrite TOS with source.
   void DropAndMove(Expression::Context destination, Register source);
 
+  // Test the JavaScript value in source as if in a test context, compile
+  // control flow to a pair of labels.
+  void TestAndBranch(Register source, Label* true_label, Label* false_label);
+
   void VisitDeclarations(ZoneList<Declaration*>* declarations);
   Handle<JSFunction> BuildBoilerplate(FunctionLiteral* fun);
   void DeclareGlobals(Handle<FixedArray> pairs);
@@ -81,6 +90,9 @@
   Handle<Script> script_;
   bool is_eval_;
 
+  Label* true_label_;
+  Label* false_label_;
+
   DISALLOW_COPY_AND_ASSIGN(FastCodeGenerator);
 };