Implement target cache for constructor calls.

src/ia32/full-codegen-ia32.cc

 // Copyright 2011 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 2112 matching lines @@
   int arg_count = args->length();
   { PreservePositionScope scope(masm()->positions_recorder());
     for (int i = 0; i < arg_count; i++) {
       VisitForStackValue(args->at(i));
     }
   }
   // Record source position for debugger.
   SetSourcePosition(expr->position());
 
   // Record call targets in unoptimized code, but not in the snapshot.
-  bool record_call_target = !Serializer::enabled();
-  if (record_call_target) {
+  if (!Serializer::enabled()) {
     flags = static_cast<CallFunctionFlags>(flags | RECORD_CALL_TARGET);
+    Handle<Object> uninitialized = CacheCells::UninitializedSentinel(isolate());
+    Handle<JSGlobalPropertyCell> cell =
+        isolate()->factory()->NewJSGlobalPropertyCell(uninitialized);
+    RecordCacheCell(expr->id(), cell);
+    __ mov(ebx, cell);
   }
+
   CallFunctionStub stub(arg_count, flags);
   __ mov(edi, Operand(esp, (arg_count + 1) * kPointerSize));
   __ CallStub(&stub, expr->id());
-  if (record_call_target) {
-    // There is a one element cache in the instruction stream.
-#ifdef DEBUG
-    int return_site_offset = masm()->pc_offset();
-#endif
-    Handle<Object> uninitialized =
-        CallFunctionStub::UninitializedSentinel(isolate());
-    Handle<JSGlobalPropertyCell> cell =
-        isolate()->factory()->NewJSGlobalPropertyCell(uninitialized);
-    __ test(eax, Immediate(cell));
-    // Patching code in the stub assumes the opcode is 1 byte and there is
-    // word for a pointer in the operand.
-    ASSERT(masm()->pc_offset() - return_site_offset >= 1 + kPointerSize);
-  }
 
   RecordJSReturnSite(expr);
   // Restore context register.
   __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
   context()->DropAndPlug(1, eax);
 }
 
 
 void FullCodeGenerator::EmitResolvePossiblyDirectEval(int arg_count) {
   // Push copy of the first argument or undefined if it doesn't exist.
@@ skipping 154 matching lines @@
   }
 
   // Call the construct call builtin that handles allocation and
   // constructor invocation.
   SetSourcePosition(expr->position());
 
   // Load function and argument count into edi and eax.
   __ SafeSet(eax, Immediate(arg_count));
   __ mov(edi, Operand(esp, arg_count * kPointerSize));
 
-  Handle<Code> construct_builtin =
-      isolate()->builtins()->JSConstructCall();
-  __ call(construct_builtin, RelocInfo::CONSTRUCT_CALL);
+  // Record call targets in unoptimized code, but not in the snapshot.
+  CallFunctionFlags flags;
+  if (!Serializer::enabled()) {
+    flags = RECORD_CALL_TARGET;
+    Handle<Object> uninitialized = CacheCells::UninitializedSentinel(isolate());
+    Handle<JSGlobalPropertyCell> cell =
+        isolate()->factory()->NewJSGlobalPropertyCell(uninitialized);
+    RecordCacheCell(expr->id(), cell);
+    __ mov(ebx, cell);
+  } else {
+    flags = NO_CALL_FUNCTION_FLAGS;
+  }
+
+  CallConstructStub stub(flags);
+  __ call(stub.GetCode(), RelocInfo::CONSTRUCT_CALL);
   context()->Plug(eax);
 }
 
 
 void FullCodeGenerator::EmitIsSmi(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   ASSERT(args->length() == 1);
 
   VisitForAccumulatorValue(args->at(0));
 
@@ skipping 2039 matching lines @@
   *context_length = 0;
   return previous_;
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32