X87: Remove --pretenure-call-new

port b5588f48 (r30767).

original commit message:

    There isn't a plan to turn it on soon, so we'll take it out in favor of cleaner code.

BUG=

Review URL: https://codereview.chromium.org/1346043005

Cr-Commit-Position: refs/heads/master@{#30829}

src/full-codegen/x87/full-codegen-x87.cc

@@ -3071,12 +3071,6 @@ void FullCodeGenerator::VisitCallNew(CallNew* expr) {
   __ mov(edi, Operand(esp, arg_count * kPointerSize));
 
   // Record call targets in unoptimized code.
-  if (FLAG_pretenuring_call_new) {
-    EnsureSlotContainsAllocationSite(expr->AllocationSiteFeedbackSlot());
-    DCHECK(expr->AllocationSiteFeedbackSlot().ToInt() ==
-           expr->CallNewFeedbackSlot().ToInt() + 1);
-  }
-
   __ LoadHeapObject(ebx, FeedbackVector());
   __ mov(edx, Immediate(SmiFromSlot(expr->CallNewFeedbackSlot())));
 
@@ -3117,15 +3111,6 @@ void FullCodeGenerator::EmitSuperConstructorCall(Call* expr) {
   __ mov(edi, Operand(esp, arg_count * kPointerSize));
 
   // Record call targets in unoptimized code.
-  if (FLAG_pretenuring_call_new) {
-    UNREACHABLE();
-    /* TODO(dslomov): support pretenuring.
-    EnsureSlotContainsAllocationSite(expr->AllocationSiteFeedbackSlot());
-    DCHECK(expr->AllocationSiteFeedbackSlot().ToInt() ==
-           expr->CallNewFeedbackSlot().ToInt() + 1);
-    */
-  }
-
   __ LoadHeapObject(ebx, FeedbackVector());
   __ mov(edx, Immediate(SmiFromSlot(expr->CallFeedbackSlot())));
 

src/x87/builtins-x87.cc

@@ -100,8 +100,7 @@ void Builtins::Generate_InOptimizationQueue(MacroAssembler* masm) {
 
 
 static void Generate_JSConstructStubHelper(MacroAssembler* masm,
-                                           bool is_api_function,
-                                           bool create_memento) {
+                                           bool is_api_function) {
   // ----------- S t a t e -------------
   //  -- eax: number of arguments
   //  -- edi: constructor function
@@ -109,9 +108,6 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
   //  -- edx: original constructor
   // -----------------------------------
 
-  // Should never create mementos for api functions.
-  DCHECK(!is_api_function || !create_memento);
-
   // Enter a construct frame.
   {
     FrameScope scope(masm, StackFrame::CONSTRUCT);
@@ -192,9 +188,6 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
       // eax: initial map
       __ movzx_b(edi, FieldOperand(eax, Map::kInstanceSizeOffset));
       __ shl(edi, kPointerSizeLog2);
-      if (create_memento) {
-        __ add(edi, Immediate(AllocationMemento::kSize));
-      }
 
       __ Allocate(edi, ebx, edi, no_reg, &rt_call, NO_ALLOCATION_FLAGS);
 
@@ -203,7 +196,7 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
       // Allocated the JSObject, now initialize the fields.
       // eax: initial map
       // ebx: JSObject
-      // edi: start of next object (including memento if create_memento)
+      // edi: start of next object
       __ mov(Operand(ebx, JSObject::kMapOffset), eax);
       __ mov(ecx, factory->empty_fixed_array());
       __ mov(Operand(ebx, JSObject::kPropertiesOffset), ecx);
@@ -211,7 +204,7 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
       // Set extra fields in the newly allocated object.
       // eax: initial map
       // ebx: JSObject
-      // edi: start of next object (including memento if create_memento)
+      // edi: start of next object
       // esi: slack tracking counter (non-API function case)
       __ mov(edx, factory->undefined_value());
       __ lea(ecx, Operand(ebx, JSObject::kHeaderSize));
@@ -244,22 +237,7 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
         __ bind(&no_inobject_slack_tracking);
       }
 
-      if (create_memento) {
-        __ lea(esi, Operand(edi, -AllocationMemento::kSize));
-        __ InitializeFieldsWithFiller(ecx, esi, edx);
-
-        // Fill in memento fields if necessary.
-        // esi: points to the allocated but uninitialized memento.
-        __ mov(Operand(esi, AllocationMemento::kMapOffset),
-               factory->allocation_memento_map());
-        // Get the cell or undefined.
-        __ mov(edx, Operand(esp, 3 * kPointerSize));
-        __ AssertUndefinedOrAllocationSite(edx);
-        __ mov(Operand(esi, AllocationMemento::kAllocationSiteOffset),
-               edx);
-      } else {
-        __ InitializeFieldsWithFiller(ecx, edi, edx);
-      }
+      __ InitializeFieldsWithFiller(ecx, edi, edx);
 
       // Add the object tag to make the JSObject real, so that we can continue
       // and jump into the continuation code at any time from now on.
@@ -275,12 +253,6 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
     // edx: original constructor
     __ bind(&rt_call);
     int offset = kPointerSize;
-    if (create_memento) {
-      // Get the cell or allocation site.
-      __ mov(edi, Operand(esp, kPointerSize * 3));
-      __ push(edi);  // argument 1: allocation site
-      offset += kPointerSize;
-    }
 
     // Must restore esi (context) and edi (constructor) before calling
     // runtime.
@@ -288,35 +260,13 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
     __ mov(edi, Operand(esp, offset));
     __ push(edi);  // argument 2/1: constructor function
     __ push(edx);  // argument 3/2: original constructor
-    if (create_memento) {
-      __ CallRuntime(Runtime::kNewObjectWithAllocationSite, 3);
-    } else {
-      __ CallRuntime(Runtime::kNewObject, 2);
-    }
+    __ CallRuntime(Runtime::kNewObject, 2);
     __ mov(ebx, eax);  // store result in ebx
 
-    // Runtime_NewObjectWithAllocationSite increments allocation count.
-    // Skip the increment.
-    Label count_incremented;
-    if (create_memento) {
-      __ jmp(&count_incremented);
-    }
-
     // New object allocated.
     // ebx: newly allocated object
     __ bind(&allocated);
 
-    if (create_memento) {
-      __ mov(ecx, Operand(esp, 3 * kPointerSize));
-      __ cmp(ecx, masm->isolate()->factory()->undefined_value());
-      __ j(equal, &count_incremented);
-      // ecx is an AllocationSite. We are creating a memento from it, so we
-      // need to increment the memento create count.
-      __ add(FieldOperand(ecx, AllocationSite::kPretenureCreateCountOffset),
-             Immediate(Smi::FromInt(1)));
-      __ bind(&count_incremented);
-    }
-
     // Restore the parameters.
     __ pop(edx);  // new.target
     __ pop(edi);  // Constructor function.
@@ -405,12 +355,12 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
 
 
 void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
-  Generate_JSConstructStubHelper(masm, false, FLAG_pretenuring_call_new);
+  Generate_JSConstructStubHelper(masm, false);
 }
 
 
 void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) {
-  Generate_JSConstructStubHelper(masm, true, false);
+  Generate_JSConstructStubHelper(masm, true);
 }
 
 

src/x87/code-stubs-x87.cc

@@ -1667,27 +1667,25 @@ static void GenerateRecordCallTarget(MacroAssembler* masm, bool is_super) {
   __ j(equal, &done, Label::kFar);
   __ CompareRoot(FieldOperand(ecx, HeapObject::kMapOffset),
                  Heap::kWeakCellMapRootIndex);
-  __ j(not_equal, FLAG_pretenuring_call_new ? &miss : &check_allocation_site);
+  __ j(not_equal, &check_allocation_site);
 
   // If the weak cell is cleared, we have a new chance to become monomorphic.
   __ JumpIfSmi(FieldOperand(ecx, WeakCell::kValueOffset), &initialize);
   __ jmp(&megamorphic);
 
-  if (!FLAG_pretenuring_call_new) {
-    __ bind(&check_allocation_site);
-    // If we came here, we need to see if we are the array function.
-    // If we didn't have a matching function, and we didn't find the megamorph
-    // sentinel, then we have in the slot either some other function or an
-    // AllocationSite.
-    __ CompareRoot(FieldOperand(ecx, 0), Heap::kAllocationSiteMapRootIndex);
-    __ j(not_equal, &miss);
+  __ bind(&check_allocation_site);
+  // If we came here, we need to see if we are the array function.
+  // If we didn't have a matching function, and we didn't find the megamorph
+  // sentinel, then we have in the slot either some other function or an
+  // AllocationSite.
+  __ CompareRoot(FieldOperand(ecx, 0), Heap::kAllocationSiteMapRootIndex);
+  __ j(not_equal, &miss);
 
-    // Make sure the function is the Array() function
-    __ LoadGlobalFunction(Context::ARRAY_FUNCTION_INDEX, ecx);
-    __ cmp(edi, ecx);
-    __ j(not_equal, &megamorphic);
-    __ jmp(&done, Label::kFar);
-  }
+  // Make sure the function is the Array() function
+  __ LoadGlobalFunction(Context::ARRAY_FUNCTION_INDEX, ecx);
+  __ cmp(edi, ecx);
+  __ j(not_equal, &megamorphic);
+  __ jmp(&done, Label::kFar);
 
   __ bind(&miss);
 
@@ -1706,24 +1704,21 @@ static void GenerateRecordCallTarget(MacroAssembler* masm, bool is_super) {
   // An uninitialized cache is patched with the function or sentinel to
   // indicate the ElementsKind if function is the Array constructor.
   __ bind(&initialize);
-  if (!FLAG_pretenuring_call_new) {
-    // Make sure the function is the Array() function
-    __ LoadGlobalFunction(Context::ARRAY_FUNCTION_INDEX, ecx);
-    __ cmp(edi, ecx);
-    __ j(not_equal, &not_array_function);
-
-    // The target function is the Array constructor,
-    // Create an AllocationSite if we don't already have it, store it in the
-    // slot.
-    CreateAllocationSiteStub create_stub(isolate);
-    CallStubInRecordCallTarget(masm, &create_stub, is_super);
-    __ jmp(&done);
-
-    __ bind(&not_array_function);
-  }
+  // Make sure the function is the Array() function
+  __ LoadGlobalFunction(Context::ARRAY_FUNCTION_INDEX, ecx);
+  __ cmp(edi, ecx);
+  __ j(not_equal, &not_array_function);
 
-  CreateWeakCellStub create_stub(isolate);
+  // The target function is the Array constructor,
+  // Create an AllocationSite if we don't already have it, store it in the
+  // slot.
+  CreateAllocationSiteStub create_stub(isolate);
   CallStubInRecordCallTarget(masm, &create_stub, is_super);
+  __ jmp(&done);
+
+  __ bind(&not_array_function);
+  CreateWeakCellStub weak_cell_stub(isolate);
+  CallStubInRecordCallTarget(masm, &weak_cell_stub, is_super);
   __ bind(&done);
 }
 
@@ -1840,24 +1835,16 @@ void CallConstructStub::Generate(MacroAssembler* masm) {
   if (RecordCallTarget()) {
     GenerateRecordCallTarget(masm, IsSuperConstructorCall());
 
-    if (FLAG_pretenuring_call_new) {
-      // Put the AllocationSite from the feedback vector into ebx.
-      // By adding kPointerSize we encode that we know the AllocationSite
-      // entry is at the feedback vector slot given by edx + 1.
-      __ mov(ebx, FieldOperand(ebx, edx, times_half_pointer_size,
-                               FixedArray::kHeaderSize + kPointerSize));
-    } else {
-      Label feedback_register_initialized;
-      // Put the AllocationSite from the feedback vector into ebx, or undefined.
-      __ mov(ebx, FieldOperand(ebx, edx, times_half_pointer_size,
-                               FixedArray::kHeaderSize));
-      Handle<Map> allocation_site_map =
-          isolate()->factory()->allocation_site_map();
-      __ cmp(FieldOperand(ebx, 0), Immediate(allocation_site_map));
-      __ j(equal, &feedback_register_initialized);
-      __ mov(ebx, isolate()->factory()->undefined_value());
-      __ bind(&feedback_register_initialized);
-    }
+    Label feedback_register_initialized;
+    // Put the AllocationSite from the feedback vector into ebx, or undefined.
+    __ mov(ebx, FieldOperand(ebx, edx, times_half_pointer_size,
+                             FixedArray::kHeaderSize));
+    Handle<Map> allocation_site_map =
+        isolate()->factory()->allocation_site_map();
+    __ cmp(FieldOperand(ebx, 0), Immediate(allocation_site_map));
+    __ j(equal, &feedback_register_initialized);
+    __ mov(ebx, isolate()->factory()->undefined_value());
+    __ bind(&feedback_register_initialized);
 
     __ AssertUndefinedOrAllocationSite(ebx);
   }