Move stack check into AllocateStackSlots so the load delay can be...

src/arm/virtual-frame-arm.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 123 matching lines @@
 }
 
 
 void VirtualFrame::AllocateStackSlots() {
   int count = local_count();
   if (count > 0) {
     Comment cmnt(masm(), "[ Allocate space for locals");
     Adjust(count);
       // Initialize stack slots with 'undefined' value.
     __ LoadRoot(ip, Heap::kUndefinedValueRootIndex);
-    for (int i = 0; i < count; i++) {
-      __ push(ip);
-    }
+  }
+  if (FLAG_check_stack) {
+    __ LoadRoot(r2, Heap::kStackLimitRootIndex);
+  }
+  for (int i = 0; i < count; i++) {
+    __ push(ip);
+  }
+  if (FLAG_check_stack) {
+    masm()->add(lr, pc, Operand(4));
+    masm()->cmp(sp, Operand(r2));
+    StackCheckStub stub;
+    // Call the stub if lower.
+    masm()->mov(pc,
+                Operand(reinterpret_cast<intptr_t>(stub.GetCode().location()),
+                        RelocInfo::CODE_TARGET),
+                LeaveCC,
+                lo);
   }
 }
 
 
 void VirtualFrame::SaveContextRegister() {
   UNIMPLEMENTED();
 }
 
 
 void VirtualFrame::RestoreContextRegister() {
@@ skipping 210 matching lines @@
   ASSERT(stack_pointer_ == element_count() - 1);
   elements_.Add(FrameElement::MemoryElement());
   stack_pointer_++;
   __ push(reg);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal