Change KeyedLoadIC interface on ia32 to take receiver and name in registers.

src/ia32/virtual-frame-ia32.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 906 matching lines @@
     receiver.ToRegister(eax);
     name.ToRegister(ecx);
   }
   name.Unuse();
   receiver.Unuse();
   return RawCallCodeObject(ic, mode);
 }
 
 
 Result VirtualFrame::CallKeyedLoadIC(RelocInfo::Mode mode) {
-  // Key and receiver are on top of the frame.  The IC expects them on
-  // the stack.  It does not drop them.
+  // Key and receiver are on top of the frame. Put them in eax and edx.
+  Result key = Pop();
+  Result receiver = Pop();
+  PrepareForCall(0, 0);
+
+  if (!key.is_register() || !key.reg().is(edx)) {
+    // Register edx is available for receiver.
+    receiver.ToRegister(edx);
+    key.ToRegister(eax);
+  } else if (!receiver.is_register() || !receiver.reg().is(eax)) {
+    // Register eax is available for key.
+    key.ToRegister(eax);
+    receiver.ToRegister(edx);
+  } else {
+    __ xchg(edx, eax);
+  }
+  key.Unuse();
+  receiver.Unuse();
+
   Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize));
-  PrepareForCall(2, 0);  // Two stack args, neither callee-dropped.
   return RawCallCodeObject(ic, mode);
 }
 
 
 Result VirtualFrame::CallStoreIC() {
   // Name, value, and receiver are on top of the frame.  The IC
   // expects name in ecx, value in eax, and receiver in edx.
   Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize));
   Result name = Pop();
   Result value = Pop();
@@ skipping 214 matching lines @@
   ASSERT(stack_pointer_ == element_count() - 1);
   elements_.Add(FrameElement::MemoryElement(info));
   stack_pointer_++;
   __ push(immediate);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal