Experimental: introduce a simple mechanism to allow jump targets with...

src/jump-target-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 112 matching lines @@
   cgen_->frame()->SpillAll();
   VirtualFrame* target_frame = new VirtualFrame(cgen_->frame());
   target_frame->Adjust(1);
   AddReachingFrame(target_frame);
   __ call(&merge_labels_.last());
 
   is_linked_ = !is_bound_;
 }
 
 
-void JumpTarget::Bind() {
+void JumpTarget::Bind(int mergable_elements) {
   ASSERT(cgen_ != NULL);
   ASSERT(!is_bound());
 
   // Live non-frame registers are not allowed at the start of a basic
   // block.
   ASSERT(!cgen_->has_valid_frame() || cgen_->HasValidEntryRegisters());
 
   // Compute the frame to use for entry to the block.
-  ComputeEntryFrame();
+  ComputeEntryFrame(mergable_elements);
 
   if (is_linked()) {
     // There were forward jumps.  All the reaching frames, beginning
     // with the current frame if any, are merged to the expected one.
     int start_index = 0;
     if (!cgen_->has_valid_frame()) {
       // Pick up the first reaching frame as the code generator's
       // current frame.
       RegisterFile reserved_registers = RegisterAllocator::Reserved();
       cgen_->SetFrame(reaching_frames_[0], &reserved_registers);
@@ skipping 31 matching lines @@
   }
 
   is_linked_ = false;
   is_bound_ = true;
 }
 
 #undef __
 
 
 } }  // namespace v8::internal