Experimental: thread live register references to deferred code....

src/register-allocator-ia32.cc

Index: src/register-allocator-ia32.cc
===================================================================
--- src/register-allocator-ia32.cc	(revision 969)
+++ src/register-allocator-ia32.cc	(working copy)
@@ -32,6 +32,25 @@
 
 namespace v8 { namespace internal {
 
+void RegisterFile::CopyTo(RegisterFile* other) {
+  for (int i = 0; i < kNumRegisters; i++) {
+    other->ref_counts_[i] = ref_counts_[i];
+  }
+}
+
+
+#ifdef DEBUG
+bool RegisterFile::Equals(RegisterFile* other) {
+  for (int i = 0; i < kNumRegisters; i++) {
+    if (ref_counts_[i] != other->ref_counts_[i]) {
+      return false;
+    }
+  }
+  return true;
+}
+#endif
+
+
 void RegisterAllocator::Initialize() {
   registers_.Reset();
   registers_.Use(esp);