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

src/register-allocator-ia32.cc

 // Copyright 2008 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 14 matching lines @@
 // (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 "codegen.h"
 #include "register-allocator.h"
 
 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);
   registers_.Use(ebp);
   registers_.Use(esi);
   registers_.Use(edi);
 }
 
 
 Register RegisterAllocator::AllocateWithoutSpilling() {
@@ skipping 18 matching lines @@
     if (!result.is(no_reg)) {
       ASSERT(!registers_.is_used(result.code()));
       registers_.Use(result);
     }
   }
   return result;
 }
 
 
 } }  // namespace v8::internal