Experimental: a quick hack to allow different live values to flow down...

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 85 matching lines @@
     ASSERT(cgen_->has_valid_frame());
     cgen_->frame()->Spill(target);
     ASSERT(cgen_->allocator()->count(target) == 1);
   }
   ASSERT(is_register());
   ASSERT(reg().is(target));
 }
 
 
 // -------------------------------------------------------------------------
+// RegisterFile implementation.
+
+
+void RegisterFile::CopyTo(RegisterFile* other) {
+  for (int i = 0; i < kNumRegisters; i++) {
+    other->ref_counts_[i] = ref_counts_[i];
+  }
+}
+
+
+// -------------------------------------------------------------------------
 // RegisterAllocator implementation.
 
 void RegisterAllocator::Initialize() {
+  Reset();
+  Use(edi);
+}
+
+
+void RegisterAllocator::Reset() {
   registers_.Reset();
   Use(esp);
   Use(ebp);
   Use(esi);
-  Use(edi);
 }
 
 
 Result RegisterAllocator::AllocateWithoutSpilling() {
   // Return the first free register, if any.
   for (int i = 0; i < num_registers(); i++) {
     if (!is_used(i)) {
       Register free_reg = { i };
       return Result(free_reg, cgen_);
     }
@@ skipping 29 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