Port inlining of type checks in call ICs for API functions to x64 and arm (is...

src/arm/macro-assembler-arm.cc

Index: src/arm/macro-assembler-arm.cc
===================================================================
--- src/arm/macro-assembler-arm.cc	(revision 4439)
+++ src/arm/macro-assembler-arm.cc	(working copy)
@@ -721,6 +721,7 @@
 Register MacroAssembler::CheckMaps(JSObject* object, Register object_reg,
                                    JSObject* holder, Register holder_reg,
                                    Register scratch,
+                                   int save_at_depth,
                                    Label* miss) {
   // Make sure there's no overlap between scratch and the other
   // registers.
@@ -728,8 +729,12 @@
 
   // Keep track of the current object in register reg.
   Register reg = object_reg;
-  int depth = 1;
+  int depth = 0;
 
+  if (save_at_depth == depth) {
+    str(reg, MemOperand(sp));
+  }
+
   // Check the maps in the prototype chain.
   // Traverse the prototype chain from the object and do map checks.
   while (object != holder) {
@@ -768,6 +773,10 @@
       mov(reg, Operand(Handle<JSObject>(prototype)));
     }
 
+    if (save_at_depth == depth) {
+      str(reg, MemOperand(sp));
+    }
+
     // Go to the next object in the prototype chain.
     object = prototype;
   }
@@ -778,7 +787,7 @@
   b(ne, miss);
 
   // Log the check depth.
-  LOG(IntEvent("check-maps-depth", depth));
+  LOG(IntEvent("check-maps-depth", depth + 1));
 
   // Perform security check for access to the global object and return
   // the holder register.