Get rid of AllocationFlags::TAG_OBJECT

src/x64/macro-assembler-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.
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 4895 matching lines @@
     movp(top_reg, result);
   }
   addp(top_reg, Immediate(object_size));
   Operand limit_operand = ExternalOperand(allocation_limit);
   cmpp(top_reg, limit_operand);
   j(above, gc_required);
 
   // Update allocation top.
   UpdateAllocationTopHelper(top_reg, scratch, flags);
 
-  bool tag_result = (flags & TAG_OBJECT) != 0;
   if (top_reg.is(result)) {
-    if (tag_result) {
-      subp(result, Immediate(object_size - kHeapObjectTag));
-    } else {
-      subp(result, Immediate(object_size));
-    }
-  } else if (tag_result) {
-    // Tag the result if requested.
+    subp(result, Immediate(object_size - kHeapObjectTag));
+  } else {
+    // Tag the result.
     DCHECK(kHeapObjectTag == 1);
     incp(result);
   }
 }
 
 
 void MacroAssembler::Allocate(int header_size,
                               ScaleFactor element_size,
                               Register element_count,
                               Register result,
@@ skipping 44 matching lines @@
   }
   addp(result_end, result);
   j(carry, gc_required);
   Operand limit_operand = ExternalOperand(allocation_limit);
   cmpp(result_end, limit_operand);
   j(above, gc_required);
 
   // Update allocation top.
   UpdateAllocationTopHelper(result_end, scratch, flags);
 
-  // Tag the result if requested.
-  if ((flags & TAG_OBJECT) != 0) {
-    addp(result, Immediate(kHeapObjectTag));
-  }
+  // Tag the result.
+  addp(result, Immediate(kHeapObjectTag));
 }
 
 
 void MacroAssembler::AllocateHeapNumber(Register result,
                                         Register scratch,
                                         Label* gc_required,
                                         MutableMode mode) {
   // Allocate heap number in new space.
-  Allocate(HeapNumber::kSize, result, scratch, no_reg, gc_required, TAG_OBJECT);
+  Allocate(HeapNumber::kSize, result, scratch, no_reg, gc_required,
+           NO_ALLOCATION_FLAGS);
 
   Heap::RootListIndex map_index = mode == MUTABLE
       ? Heap::kMutableHeapNumberMapRootIndex
       : Heap::kHeapNumberMapRootIndex;
 
   // Set the map.
   LoadRoot(kScratchRegister, map_index);
   movp(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister);
 }
 
@@ skipping 11 matching lines @@
   DCHECK(kShortSize == 2);
   // scratch1 = length * 2 + kObjectAlignmentMask.
   leap(scratch1, Operand(length, length, times_1, kObjectAlignmentMask +
                 kHeaderAlignment));
   andp(scratch1, Immediate(~kObjectAlignmentMask));
   if (kHeaderAlignment > 0) {
     subp(scratch1, Immediate(kHeaderAlignment));
   }
 
   // Allocate two byte string in new space.
-  Allocate(SeqTwoByteString::kHeaderSize,
-           times_1,
-           scratch1,
-           result,
-           scratch2,
-           scratch3,
-           gc_required,
-           TAG_OBJECT);
+  Allocate(SeqTwoByteString::kHeaderSize, times_1, scratch1, result, scratch2,
+           scratch3, gc_required, NO_ALLOCATION_FLAGS);
 
   // Set the map, length and hash field.
   LoadRoot(kScratchRegister, Heap::kStringMapRootIndex);
   movp(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister);
   Integer32ToSmi(scratch1, length);
   movp(FieldOperand(result, String::kLengthOffset), scratch1);
   movp(FieldOperand(result, String::kHashFieldOffset),
        Immediate(String::kEmptyHashField));
 }
 
 
 void MacroAssembler::AllocateOneByteString(Register result, Register length,
                                            Register scratch1, Register scratch2,
                                            Register scratch3,
                                            Label* gc_required) {
   // Calculate the number of bytes needed for the characters in the string while
   // observing object alignment.
   const int kHeaderAlignment = SeqOneByteString::kHeaderSize &
                                kObjectAlignmentMask;
   movl(scratch1, length);
   DCHECK(kCharSize == 1);
   addp(scratch1, Immediate(kObjectAlignmentMask + kHeaderAlignment));
   andp(scratch1, Immediate(~kObjectAlignmentMask));
   if (kHeaderAlignment > 0) {
     subp(scratch1, Immediate(kHeaderAlignment));
   }
 
   // Allocate one-byte string in new space.
-  Allocate(SeqOneByteString::kHeaderSize,
-           times_1,
-           scratch1,
-           result,
-           scratch2,
-           scratch3,
-           gc_required,
-           TAG_OBJECT);
+  Allocate(SeqOneByteString::kHeaderSize, times_1, scratch1, result, scratch2,
+           scratch3, gc_required, NO_ALLOCATION_FLAGS);
 
   // Set the map, length and hash field.
   LoadRoot(kScratchRegister, Heap::kOneByteStringMapRootIndex);
   movp(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister);
   Integer32ToSmi(scratch1, length);
   movp(FieldOperand(result, String::kLengthOffset), scratch1);
   movp(FieldOperand(result, String::kHashFieldOffset),
        Immediate(String::kEmptyHashField));
 }
 
 
 void MacroAssembler::AllocateTwoByteConsString(Register result,
                                         Register scratch1,
                                         Register scratch2,
                                         Label* gc_required) {
   // Allocate heap number in new space.
   Allocate(ConsString::kSize, result, scratch1, scratch2, gc_required,
-           TAG_OBJECT);
+           NO_ALLOCATION_FLAGS);
 
   // Set the map. The other fields are left uninitialized.
   LoadRoot(kScratchRegister, Heap::kConsStringMapRootIndex);
   movp(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister);
 }
 
 
 void MacroAssembler::AllocateOneByteConsString(Register result,
                                                Register scratch1,
                                                Register scratch2,
                                                Label* gc_required) {
-  Allocate(ConsString::kSize,
-           result,
-           scratch1,
-           scratch2,
-           gc_required,
-           TAG_OBJECT);
+  Allocate(ConsString::kSize, result, scratch1, scratch2, gc_required,
+           NO_ALLOCATION_FLAGS);
 
   // Set the map. The other fields are left uninitialized.
   LoadRoot(kScratchRegister, Heap::kConsOneByteStringMapRootIndex);
   movp(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister);
 }
 
 
 void MacroAssembler::AllocateTwoByteSlicedString(Register result,
                                           Register scratch1,
                                           Register scratch2,
                                           Label* gc_required) {
   // Allocate heap number in new space.
   Allocate(SlicedString::kSize, result, scratch1, scratch2, gc_required,
-           TAG_OBJECT);
+           NO_ALLOCATION_FLAGS);
 
   // Set the map. The other fields are left uninitialized.
   LoadRoot(kScratchRegister, Heap::kSlicedStringMapRootIndex);
   movp(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister);
 }
 
 
 void MacroAssembler::AllocateOneByteSlicedString(Register result,
                                                  Register scratch1,
                                                  Register scratch2,
                                                  Label* gc_required) {
   // Allocate heap number in new space.
   Allocate(SlicedString::kSize, result, scratch1, scratch2, gc_required,
-           TAG_OBJECT);
+           NO_ALLOCATION_FLAGS);
 
   // Set the map. The other fields are left uninitialized.
   LoadRoot(kScratchRegister, Heap::kSlicedOneByteStringMapRootIndex);
   movp(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister);
 }
 
 
 void MacroAssembler::AllocateJSValue(Register result, Register constructor,
                                      Register value, Register scratch,
                                      Label* gc_required) {
   DCHECK(!result.is(constructor));
   DCHECK(!result.is(scratch));
   DCHECK(!result.is(value));
 
   // Allocate JSValue in new space.
-  Allocate(JSValue::kSize, result, scratch, no_reg, gc_required, TAG_OBJECT);
+  Allocate(JSValue::kSize, result, scratch, no_reg, gc_required,
+           NO_ALLOCATION_FLAGS);
 
   // Initialize the JSValue.
   LoadGlobalFunctionInitialMap(constructor, scratch);
   movp(FieldOperand(result, HeapObject::kMapOffset), scratch);
   LoadRoot(scratch, Heap::kEmptyFixedArrayRootIndex);
   movp(FieldOperand(result, JSObject::kPropertiesOffset), scratch);
   movp(FieldOperand(result, JSObject::kElementsOffset), scratch);
   movp(FieldOperand(result, JSValue::kValueOffset), value);
   STATIC_ASSERT(JSValue::kSize == 4 * kPointerSize);
 }
@@ skipping 537 matching lines @@
   movl(rax, dividend);
   shrl(rax, Immediate(31));
   addl(rdx, rax);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64