* String type inference using compiler framework.

src/register-allocator.cc

 // Copyright 2009 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
@@ skipping 18 matching lines @@
 
 #include "codegen-inl.h"
 #include "register-allocator-inl.h"
 
 namespace v8 { namespace internal {
 
 // -------------------------------------------------------------------------
 // Result implementation.
 
 Result::Result(Register reg, CodeGenerator* cgen)
-  : type_(REGISTER),
-    cgen_(cgen) {
+    : static_type_(),
+      type_(REGISTER),
+      cgen_(cgen) {
   data_.reg_ = reg;
   ASSERT(reg.is_valid());
   cgen_->allocator()->Use(reg);
+}
+
+
+Result::Result(Register reg, CodeGenerator* cgen, StaticType static_type)
+    : static_type_(static_type),
+      type_(REGISTER),
+      cgen_(cgen) {
+  data_.reg_ = reg;
+  ASSERT(reg.is_valid());
+  cgen_->allocator()->Use(reg);
 }
 
 
 void Result::CopyTo(Result* destination) const {
+  destination->static_type_ = static_type_;
   destination->type_ = type();
   destination->cgen_ = cgen_;
 
   if (is_register()) {
     destination->data_.reg_ = reg();
     cgen_->allocator()->Use(reg());
   } else if (is_constant()) {
     destination->data_.handle_ = data_.handle_;
   } else {
     ASSERT(!is_valid());
@@ skipping 53 matching lines @@
     cgen_->frame()->Spill(target);
     ASSERT(!is_used(target));
     return Result(target, cgen_);
   }
   // Otherwise (if it's referenced outside the frame) we cannot allocate it.
   return Result(cgen_);
 }
 
 
 } }  // namespace v8::internal