CallICStub with a "never patch" approach until customization.

src/x64/full-codegen-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "code-stubs.h"
 #include "codegen.h"
@@ skipping 2536 matching lines @@
 
 
 void FullCodeGenerator::CallIC(Handle<Code> code,
                                TypeFeedbackId ast_id) {
   ic_total_count_++;
   __ call(code, RelocInfo::CODE_TARGET, ast_id);
 }
 
 
 // Code common for calls using the IC.
-void FullCodeGenerator::EmitCallWithIC(Call* expr) {
+void FullCodeGenerator::EmitCallWithLoadIC(Call* expr) {
   Expression* callee = expr->expression();
-  ZoneList<Expression*>* args = expr->arguments();
-  int arg_count = args->length();
 
-  CallFunctionFlags flags;
-  // Get the target function;
-  if (callee->IsVariableProxy()) {
+  CallIC::CallType call_type = callee->IsVariableProxy()
+      ? CallIC::FUNCTION
+      : CallIC::METHOD;
+  // Get the target function.
+  if (call_type == CallIC::FUNCTION) {
     { StackValueContext context(this);
       EmitVariableLoad(callee->AsVariableProxy());
       PrepareForBailout(callee, NO_REGISTERS);
     }
     // Push undefined as receiver. This is patched in the method prologue if it
     // is a sloppy mode method.
     __ Push(isolate()->factory()->undefined_value());
-    flags = NO_CALL_FUNCTION_FLAGS;
   } else {
     // Load the function from the receiver.
     ASSERT(callee->IsProperty());
     __ movp(rax, Operand(rsp, 0));
     EmitNamedPropertyLoad(callee->AsProperty());
     PrepareForBailoutForId(callee->AsProperty()->LoadId(), TOS_REG);
     // Push the target function under the receiver.
     __ Push(Operand(rsp, 0));
     __ movp(Operand(rsp, kPointerSize), rax);
-    flags = CALL_AS_METHOD;
   }
 
-  // Load the arguments.
-  { 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());
-  CallFunctionStub stub(isolate(), arg_count, flags);
-  __ movp(rdi, Operand(rsp, (arg_count + 1) * kPointerSize));
-  __ CallStub(&stub);
-
-  RecordJSReturnSite(expr);
-
-  // Restore context register.
-  __ movp(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
-
-  context()->DropAndPlug(1, rax);
+  EmitCall(expr, call_type);
 }
 
 
 // Common code for calls using the IC.
-void FullCodeGenerator::EmitKeyedCallWithIC(Call* expr,
-                                            Expression* key) {
+void FullCodeGenerator::EmitKeyedCallWithLoadIC(Call* expr,
+                                                Expression* key) {
   // Load the key.
   VisitForAccumulatorValue(key);
 
   Expression* callee = expr->expression();
-  ZoneList<Expression*>* args = expr->arguments();
-  int arg_count = args->length();
 
   // Load the function from the receiver.
   ASSERT(callee->IsProperty());
   __ movp(rdx, Operand(rsp, 0));
   EmitKeyedPropertyLoad(callee->AsProperty());
   PrepareForBailoutForId(callee->AsProperty()->LoadId(), TOS_REG);
 
   // Push the target function under the receiver.
   __ Push(Operand(rsp, 0));
   __ movp(Operand(rsp, kPointerSize), rax);
 
-  // Load the arguments.
-  { 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());
-  CallFunctionStub stub(isolate(), arg_count, CALL_AS_METHOD);
-  __ movp(rdi, Operand(rsp, (arg_count + 1) * kPointerSize));
-  __ CallStub(&stub);
-
-  RecordJSReturnSite(expr);
-  // Restore context register.
-  __ movp(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
-
-  context()->DropAndPlug(1, rax);
+  EmitCall(expr, CallIC::METHOD);
 }
 
 
-void FullCodeGenerator::EmitCallWithStub(Call* expr) {
-  // Code common for calls using the call stub.
+void FullCodeGenerator::EmitCall(Call* expr, CallIC::CallType call_type) {
+  // Load the arguments.
   ZoneList<Expression*>* args = expr->arguments();
   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.
+
+  // Record source position of the IC call.
   SetSourcePosition(expr->position());
+  Handle<Code> ic = CallIC::initialize_stub(
+      isolate(), arg_count, call_type);
+  __ Move(rdx, Smi::FromInt(expr->CallFeedbackSlot()));
+  __ movp(rdi, Operand(rsp, (arg_count + 1) * kPointerSize));
+  // Don't assign a type feedback id to the IC, since type feedback is provided
+  // by the vector above.
+  CallIC(ic);
 
-  __ Move(rbx, FeedbackVector());
-  __ Move(rdx, Smi::FromInt(expr->CallFeedbackSlot()));
+  RecordJSReturnSite(expr);
 
-  // Record call targets in unoptimized code.
-  CallFunctionStub stub(isolate(), arg_count, RECORD_CALL_TARGET);
-  __ movp(rdi, Operand(rsp, (arg_count + 1) * kPointerSize));
-  __ CallStub(&stub);
-  RecordJSReturnSite(expr);
   // Restore context register.
   __ movp(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
   // Discard the function left on TOS.
   context()->DropAndPlug(1, rax);
 }
 
 
 void FullCodeGenerator::EmitResolvePossiblyDirectEval(int arg_count) {
   // Push copy of the first argument or undefined if it doesn't exist.
   if (arg_count > 0) {
@@ skipping 56 matching lines @@
     // Record source position for debugger.
     SetSourcePosition(expr->position());
     CallFunctionStub stub(isolate(), arg_count, NO_CALL_FUNCTION_FLAGS);
     __ movp(rdi, Operand(rsp, (arg_count + 1) * kPointerSize));
     __ CallStub(&stub);
     RecordJSReturnSite(expr);
     // Restore context register.
     __ movp(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
     context()->DropAndPlug(1, rax);
   } else if (call_type == Call::GLOBAL_CALL) {
-    EmitCallWithIC(expr);
+    EmitCallWithLoadIC(expr);
 
   } else if (call_type == Call::LOOKUP_SLOT_CALL) {
     // Call to a lookup slot (dynamically introduced variable).
     VariableProxy* proxy = callee->AsVariableProxy();
     Label slow, done;
 
     { PreservePositionScope scope(masm()->positions_recorder());
       // Generate code for loading from variables potentially shadowed by
       // eval-introduced variables.
       EmitDynamicLookupFastCase(proxy->var(), NOT_INSIDE_TYPEOF, &slow, &done);
@@ skipping 16 matching lines @@
       // Push function.
       __ Push(rax);
       // The receiver is implicitly the global receiver. Indicate this by
       // passing the hole to the call function stub.
       __ PushRoot(Heap::kUndefinedValueRootIndex);
       __ bind(&call);
     }
 
     // The receiver is either the global receiver or an object found by
     // LoadContextSlot.
-    EmitCallWithStub(expr);
+    EmitCall(expr);
   } else if (call_type == Call::PROPERTY_CALL) {
     Property* property = callee->AsProperty();
     { PreservePositionScope scope(masm()->positions_recorder());
       VisitForStackValue(property->obj());
     }
     if (property->key()->IsPropertyName()) {
-      EmitCallWithIC(expr);
+      EmitCallWithLoadIC(expr);
     } else {
-      EmitKeyedCallWithIC(expr, property->key());
+      EmitKeyedCallWithLoadIC(expr, property->key());
     }
   } else {
     ASSERT(call_type == Call::OTHER_CALL);
     // Call to an arbitrary expression not handled specially above.
     { PreservePositionScope scope(masm()->positions_recorder());
       VisitForStackValue(callee);
     }
     __ PushRoot(Heap::kUndefinedValueRootIndex);
     // Emit function call.
-    EmitCallWithStub(expr);
+    EmitCall(expr);
   }
 
 #ifdef DEBUG
   // RecordJSReturnSite should have been called.
   ASSERT(expr->return_is_recorded_);
 #endif
 }
 
 
 void FullCodeGenerator::VisitCallNew(CallNew* expr) {
@@ skipping 25 matching lines @@
   // Record call targets in unoptimized code, but not in the snapshot.
   if (FLAG_pretenuring_call_new) {
     EnsureSlotContainsAllocationSite(expr->AllocationSiteFeedbackSlot());
     ASSERT(expr->AllocationSiteFeedbackSlot() ==
            expr->CallNewFeedbackSlot() + 1);
   }
 
   __ Move(rbx, FeedbackVector());
   __ Move(rdx, Smi::FromInt(expr->CallNewFeedbackSlot()));
 
-  CallConstructStub stub(isolate(), RECORD_CALL_TARGET);
+  CallConstructStub stub(isolate(), RECORD_CONSTRUCTOR_TARGET);
   __ Call(stub.GetCode(), RelocInfo::CONSTRUCT_CALL);
   PrepareForBailoutForId(expr->ReturnId(), TOS_REG);
   context()->Plug(rax);
 }
 
 
 void FullCodeGenerator::EmitIsSmi(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   ASSERT(args->length() == 1);
 
@@ skipping 2034 matching lines @@
   ASSERT_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(),
             Assembler::target_address_at(call_target_address,
                                          unoptimized_code));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64