Pass key and receiver in registers for keyed load IC on ARM...

src/arm/virtual-frame-arm.cc

Index: src/arm/virtual-frame-arm.cc
===================================================================
--- src/arm/virtual-frame-arm.cc	(revision 4607)
+++ src/arm/virtual-frame-arm.cc	(working copy)
@@ -323,7 +323,8 @@
 
 void VirtualFrame::CallKeyedLoadIC() {
   Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize));
-  SpillAllButCopyTOSToR0();
+  PopToR1R0();
+  SpillAll();
   CallCodeObject(ic, RelocInfo::CODE_TARGET, 0);
 }
 
@@ -532,6 +533,47 @@
 }
 
 
+void VirtualFrame::Dup2() {
+  if (SpilledScope::is_spilled()) {
+    __ ldr(ip, MemOperand(sp, kPointerSize));
+    EmitPush(ip);
+    __ ldr(ip, MemOperand(sp, kPointerSize));
+    EmitPush(ip);
+  } else {
+    switch (top_of_stack_state_) {
+      case NO_TOS_REGISTERS:
+        __ ldr(r0, MemOperand(sp, 0));
+        __ ldr(r1, MemOperand(sp, kPointerSize));
+        top_of_stack_state_ = R0_R1_TOS;
+        break;
+      case R0_TOS:
+        __ push(r0);
+        __ ldr(r1, MemOperand(sp, kPointerSize));
+        top_of_stack_state_ = R0_R1_TOS;
+        break;
+      case R1_TOS:
+        __ push(r1);
+        __ ldr(r0, MemOperand(sp, kPointerSize));
+        top_of_stack_state_ = R1_R0_TOS;
+        break;
+      case R0_R1_TOS:
+        __ push(r1);
+        __ push(r0);
+        top_of_stack_state_ = R0_R1_TOS;
+        break;
+      case R1_R0_TOS:
+        __ push(r0);
+        __ push(r1);
+        top_of_stack_state_ = R1_R0_TOS;
+        break;
+      default:
+        UNREACHABLE();
+    }
+  }
+  element_count_ += 2;
+}
+
+
 Register VirtualFrame::PopToRegister(Register but_not_to_this_one) {
   ASSERT(but_not_to_this_one.is(r0) ||
          but_not_to_this_one.is(r1) ||