Added support for expression statements to the CFG builder and...

src/cfg.h

Index: src/cfg.h
===================================================================
--- src/cfg.h	(revision 2628)
+++ src/cfg.h	(working copy)
@@ -201,11 +201,13 @@
 // computation is not needed (though its side effects are).
 class Effect : public Location {
  public:
-  // We should not try to emit code to read or write to Effect.
+  // We should not try to emit code to read Effect.
   void Get(MacroAssembler* masm, Register reg) { UNREACHABLE(); }
-  void Set(MacroAssembler* masm, Register reg) { UNREACHABLE(); }
   void Push(MacroAssembler* masm) { UNREACHABLE(); }
 
+  // Setting Effect is ignored.
+  void Set(MacroAssembler* masm, Register reg) {}
+
 #ifdef DEBUG
   void Print();
 #endif
@@ -311,6 +313,7 @@
 
   // Accessors.
   Location* location() { return loc_; }
+  void set_location(Location* loc) { loc_ = loc; }
 
   // Support for fast-compilation mode: