Fast path for strict closure creation.

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index c539ff564626c4f7b4499487c96a8e6d37593521..fd340f7f8378d9da7ae3e0ad778348b7fba0f0fd 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -69,11 +69,15 @@ void FastNewClosureStub::Generate(MacroAssembler* masm) {
   // Get the function info from the stack.
   __ mov(edx, Operand(esp, 1 * kPointerSize));
 
+  int map_index = strict_mode_ == kStrictMode
+      ? Context::FUNCTION_MAP_STRICT_INDEX

[Mads Ager (chromium), 2011/03/15 08:49:54]

This is part of another change but I think I would prefer the name
STRICT_FUNCTION_MAP_INDEX or even (but that is very long)
STRICT_MODE_FUNCTION_MAP_INDEX. Similarly for the other strict mode variants of
maps.

+      : Context::FUNCTION_MAP_INDEX;
+
   // Compute the function map in the current global context and set that
   // as the map of the allocated object.
   __ mov(ecx, Operand(esi, Context::SlotOffset(Context::GLOBAL_INDEX)));
   __ mov(ecx, FieldOperand(ecx, GlobalObject::kGlobalContextOffset));
-  __ mov(ecx, Operand(ecx, Context::SlotOffset(Context::FUNCTION_MAP_INDEX)));
+  __ mov(ecx, Operand(ecx, Context::SlotOffset(map_index)));
   __ mov(FieldOperand(eax, JSObject::kMapOffset), ecx);
 
   // Initialize the rest of the function. We don't have to update the