Merge Label and NearLabel

src/x64/full-codegen-x64.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 221 matching lines @@
       // For named function expressions, declare the function name as a
       // constant.
       if (scope()->is_function_scope() && scope()->function() != NULL) {
         EmitDeclaration(scope()->function(), Variable::CONST, NULL);
       }
       VisitDeclarations(scope()->declarations());
     }
 
     { Comment cmnt(masm_, "[ Stack check");
       PrepareForBailoutForId(AstNode::kFunctionEntryId, NO_REGISTERS);
-      NearLabel ok;
+      Label ok;
       __ CompareRoot(rsp, Heap::kStackLimitRootIndex);
-      __ j(above_equal, &ok);
+      __ j(above_equal, &ok, Label::kNear);
       StackCheckStub stub;
       __ CallStub(&stub);
       __ bind(&ok);
     }
 
     { Comment cmnt(masm_, "[ Body");
       ASSERT(loop_depth() == 0);
       VisitStatements(function()->body());
       ASSERT(loop_depth() == 0);
     }
   }
 
   // Always emit a 'return undefined' in case control fell off the end of
   // the body.
   { Comment cmnt(masm_, "[ return <undefined>;");
     __ LoadRoot(rax, Heap::kUndefinedValueRootIndex);
     EmitReturnSequence();
   }
 }
 
 
 void FullCodeGenerator::ClearAccumulator() {
   __ Set(rax, 0);
 }
 
 
 void FullCodeGenerator::EmitStackCheck(IterationStatement* stmt) {
   Comment cmnt(masm_, "[ Stack check");
-  NearLabel ok;
+  Label ok;
   __ CompareRoot(rsp, Heap::kStackLimitRootIndex);
-  __ j(above_equal, &ok);
+  __ j(above_equal, &ok, Label::kNear);
   StackCheckStub stub;
   __ CallStub(&stub);
   // Record a mapping of this PC offset to the OSR id.  This is used to find
   // the AST id from the unoptimized code in order to use it as a key into
   // the deoptimization input data found in the optimized code.
   RecordStackCheck(stmt->OsrEntryId());
 
   // Loop stack checks can be patched to perform on-stack replacement. In
   // order to decide whether or not to perform OSR we embed the loop depth
   // in a test instruction after the call so we can extract it from the OSR
@@ skipping 192 matching lines @@
 void FullCodeGenerator::EffectContext::Plug(Label* materialize_true,
                                             Label* materialize_false) const {
   ASSERT(materialize_true == materialize_false);
   __ bind(materialize_true);
 }
 
 
 void FullCodeGenerator::AccumulatorValueContext::Plug(
     Label* materialize_true,
     Label* materialize_false) const {
-  NearLabel done;
+  Label done;
   __ bind(materialize_true);
   __ Move(result_register(), isolate()->factory()->true_value());
-  __ jmp(&done);
+  __ jmp(&done, Label::kNear);
   __ bind(materialize_false);
   __ Move(result_register(), isolate()->factory()->false_value());
   __ bind(&done);
 }
 
 
 void FullCodeGenerator::StackValueContext::Plug(
     Label* materialize_true,
     Label* materialize_false) const {
-  NearLabel done;
+  Label done;
   __ bind(materialize_true);
   __ Push(isolate()->factory()->true_value());
-  __ jmp(&done);
+  __ jmp(&done, Label::kNear);
   __ bind(materialize_false);
   __ Push(isolate()->factory()->false_value());
   __ bind(&done);
 }
 
 
 void FullCodeGenerator::TestContext::Plug(Label* materialize_true,
                                           Label* materialize_false) const {
   ASSERT(materialize_true == true_label_);
   ASSERT(materialize_false == false_label_);
@@ skipping 116 matching lines @@
 
 void FullCodeGenerator::PrepareForBailoutBeforeSplit(State state,
                                                      bool should_normalize,
                                                      Label* if_true,
                                                      Label* if_false) {
   // Only prepare for bailouts before splits if we're in a test
   // context. Otherwise, we let the Visit function deal with the
   // preparation to avoid preparing with the same AST id twice.
   if (!context()->IsTest() || !info_->IsOptimizable()) return;
 
-  NearLabel skip;
-  if (should_normalize) __ jmp(&skip);
+  Label skip;
+  if (should_normalize) __ jmp(&skip, Label::kNear);
 
   ForwardBailoutStack* current = forward_bailout_stack_;
   while (current != NULL) {
     PrepareForBailout(current->expr(), state);
     current = current->parent();
   }
 
   if (should_normalize) {
     __ CompareRoot(rax, Heap::kTrueValueRootIndex);
     Split(equal, if_true, if_false, NULL);
@@ skipping 258 matching lines @@
   __ cmpq(rdx, empty_descriptor_array_value);
   __ j(equal, &call_runtime);
 
   // Check that there is an enum cache in the non-empty instance
   // descriptors (rdx).  This is the case if the next enumeration
   // index field does not contain a smi.
   __ movq(rdx, FieldOperand(rdx, DescriptorArray::kEnumerationIndexOffset));
   __ JumpIfSmi(rdx, &call_runtime);
 
   // For all objects but the receiver, check that the cache is empty.
-  NearLabel check_prototype;
+  Label check_prototype;
   __ cmpq(rcx, rax);
-  __ j(equal, &check_prototype);
+  __ j(equal, &check_prototype, Label::kNear);
   __ movq(rdx, FieldOperand(rdx, DescriptorArray::kEnumCacheBridgeCacheOffset));
   __ cmpq(rdx, empty_fixed_array_value);
   __ j(not_equal, &call_runtime);
 
   // Load the prototype from the map and loop if non-null.
   __ bind(&check_prototype);
   __ movq(rcx, FieldOperand(rbx, Map::kPrototypeOffset));
   __ cmpq(rcx, null_value);
   __ j(not_equal, &next);
 
   // The enum cache is valid.  Load the map of the object being
   // iterated over and use the cache for the iteration.
-  NearLabel use_cache;
+  Label use_cache;
   __ movq(rax, FieldOperand(rax, HeapObject::kMapOffset));
-  __ jmp(&use_cache);
+  __ jmp(&use_cache, Label::kNear);
 
   // Get the set of properties to enumerate.
   __ bind(&call_runtime);
   __ push(rax);  // Duplicate the enumerable object on the stack.
   __ CallRuntime(Runtime::kGetPropertyNamesFast, 1);
 
   // If we got a map from the runtime call, we can do a fast
   // modification check. Otherwise, we got a fixed array, and we have
   // to do a slow check.
-  NearLabel fixed_array;
+  Label fixed_array;
   __ CompareRoot(FieldOperand(rax, HeapObject::kMapOffset),
                  Heap::kMetaMapRootIndex);
-  __ j(not_equal, &fixed_array);
+  __ j(not_equal, &fixed_array, Label::kNear);
 
   // We got a map in register rax. Get the enumeration cache from it.
   __ bind(&use_cache);
   __ movq(rcx, FieldOperand(rax, Map::kInstanceDescriptorsOffset));
   __ movq(rcx, FieldOperand(rcx, DescriptorArray::kEnumerationIndexOffset));
   __ movq(rdx, FieldOperand(rcx, DescriptorArray::kEnumCacheBridgeCacheOffset));
 
   // Setup the four remaining stack slots.
   __ push(rax);  // Map.
   __ push(rdx);  // Enumeration cache.
@@ skipping 23 matching lines @@
                             index.reg,
                             index.scale,
                             FixedArray::kHeaderSize));
 
   // Get the expected map from the stack or a zero map in the
   // permanent slow case into register rdx.
   __ movq(rdx, Operand(rsp, 3 * kPointerSize));
 
   // Check if the expected map still matches that of the enumerable.
   // If not, we have to filter the key.
-  NearLabel update_each;
+  Label update_each;
   __ movq(rcx, Operand(rsp, 4 * kPointerSize));
   __ cmpq(rdx, FieldOperand(rcx, HeapObject::kMapOffset));
-  __ j(equal, &update_each);
+  __ j(equal, &update_each, Label::kNear);
 
   // Convert the entry to a string or null if it isn't a property
   // anymore. If the property has been removed while iterating, we
   // just skip it.
   __ push(rcx);  // Enumerable.
   __ push(rbx);  // Current entry.
   __ InvokeBuiltin(Builtins::FILTER_KEY, CALL_FUNCTION);
   __ Cmp(rax, Smi::FromInt(0));
   __ j(equal, loop_statement.continue_target());
   __ movq(rbx, rax);
@@ skipping 87 matching lines @@
     // If no outer scope calls eval, we do not need to check more
     // context extensions.  If we have reached an eval scope, we check
     // all extensions from this point.
     if (!s->outer_scope_calls_eval() || s->is_eval_scope()) break;
     s = s->outer_scope();
   }
 
   if (s != NULL && s->is_eval_scope()) {
     // Loop up the context chain.  There is no frame effect so it is
     // safe to use raw labels here.
-    NearLabel next, fast;
+    Label next, fast;
     if (!context.is(temp)) {
       __ movq(temp, context);
     }
     // Load map for comparison into register, outside loop.
     __ LoadRoot(kScratchRegister, Heap::kGlobalContextMapRootIndex);
     __ bind(&next);
     // Terminate at global context.
     __ cmpq(kScratchRegister, FieldOperand(temp, HeapObject::kMapOffset));
-    __ j(equal, &fast);
+    __ j(equal, &fast, Label::kNear);
     // Check that extension is NULL.
     __ cmpq(ContextOperand(temp, Context::EXTENSION_INDEX), Immediate(0));
     __ j(not_equal, slow);
     // Load next context in chain.
     __ movq(temp, ContextOperand(temp, Context::CLOSURE_INDEX));
     __ movq(temp, FieldOperand(temp, JSFunction::kContextOffset));
     __ jmp(&next);
     __ bind(&fast);
   }
 
@@ skipping 128 matching lines @@
 
     context()->Plug(rax);
 
   } else if (slot != NULL) {
     Comment cmnt(masm_, (slot->type() == Slot::CONTEXT)
                             ? "Context slot"
                             : "Stack slot");
     if (var->mode() == Variable::CONST) {
       // Constants may be the hole value if they have not been initialized.
       // Unhole them.
-      NearLabel done;
+      Label done;
       MemOperand slot_operand = EmitSlotSearch(slot, rax);
       __ movq(rax, slot_operand);
       __ CompareRoot(rax, Heap::kTheHoleValueRootIndex);
-      __ j(not_equal, &done);
+      __ j(not_equal, &done, Label::kNear);
       __ LoadRoot(rax, Heap::kUndefinedValueRootIndex);
       __ bind(&done);
       context()->Plug(rax);
     } else {
       context()->Plug(slot);
     }
 
   } else {
     Comment cmnt(masm_, "Rewritten parameter");
     ASSERT_NOT_NULL(property);
@@ skipping 385 matching lines @@
 
 
 void FullCodeGenerator::EmitInlineSmiBinaryOp(BinaryOperation* expr,
                                               Token::Value op,
                                               OverwriteMode mode,
                                               Expression* left,
                                               Expression* right) {
   // Do combined smi check of the operands. Left operand is on the
   // stack (popped into rdx). Right operand is in rax but moved into
   // rcx to make the shifts easier.
-  NearLabel done, stub_call, smi_case;
+  NearLabel stub_call, smi_case;
+  Label done;
   __ pop(rdx);
   __ movq(rcx, rax);
   __ or_(rax, rdx);
   JumpPatchSite patch_site(masm_);
   patch_site.EmitJumpIfSmi(rax, &smi_case);
 
   __ bind(&stub_call);
   __ movq(rax, rcx);
   TypeRecordingBinaryOpStub stub(op, mode);
   EmitCallIC(stub.GetCode(), &patch_site, expr->id());
-  __ jmp(&done);
+  __ jmp(&done, Label::kNear);
 
   __ bind(&smi_case);
   switch (op) {
     case Token::SAR:
       __ SmiShiftArithmeticRight(rax, rdx, rcx);
       break;
     case Token::SHL:
       __ SmiShiftLeft(rax, rdx, rcx);
       break;
     case Token::SHR:
@@ skipping 494 matching lines @@
     __ push(context_register());
     __ Push(var->name());
     __ CallRuntime(Runtime::kLoadContextSlot, 2);
     __ push(rax);  // Function.
     __ push(rdx);  // Receiver.
 
     // If fast case code has been generated, emit code to push the
     // function and receiver and have the slow path jump around this
     // code.
     if (done.is_linked()) {
-      NearLabel call;
-      __ jmp(&call);
+      Label call;
+      __ jmp(&call, Label::kNear);
       __ bind(&done);
       // Push function.
       __ push(rax);
       // Push global receiver.
       __ movq(rbx, GlobalObjectOperand());
       __ push(FieldOperand(rbx, GlobalObject::kGlobalReceiverOffset));
       __ bind(&call);
     }
 
     // The receiver is either the global receiver or a JSObject found by
@@ skipping 420 matching lines @@
   __ Move(rax, Smi::FromInt(scope()->num_parameters()));
   ArgumentsAccessStub stub(ArgumentsAccessStub::READ_ELEMENT);
   __ CallStub(&stub);
   context()->Plug(rax);
 }
 
 
 void FullCodeGenerator::EmitArgumentsLength(ZoneList<Expression*>* args) {
   ASSERT(args->length() == 0);
 
-  NearLabel exit;
+  Label exit;
   // Get the number of formal parameters.
   __ Move(rax, Smi::FromInt(scope()->num_parameters()));
 
   // Check if the calling frame is an arguments adaptor frame.
   __ movq(rbx, Operand(rbp, StandardFrameConstants::kCallerFPOffset));
   __ Cmp(Operand(rbx, StandardFrameConstants::kContextOffset),
          Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR));
-  __ j(not_equal, &exit);
+  __ j(not_equal, &exit, Label::kNear);
 
   // Arguments adaptor case: Read the arguments length from the
   // adaptor frame.
   __ movq(rax, Operand(rbx, ArgumentsAdaptorFrameConstants::kLengthOffset));
 
   __ bind(&exit);
   if (FLAG_debug_code) __ AbortIfNotSmi(rax);
   context()->Plug(rax);
 }
 
@@ skipping 515 matching lines @@
   Register cache = rbx;
   Register tmp = rcx;
   __ movq(cache, ContextOperand(rsi, Context::GLOBAL_INDEX));
   __ movq(cache,
           FieldOperand(cache, GlobalObject::kGlobalContextOffset));
   __ movq(cache,
           ContextOperand(cache, Context::JSFUNCTION_RESULT_CACHES_INDEX));
   __ movq(cache,
           FieldOperand(cache, FixedArray::OffsetOfElementAt(cache_id)));
 
-  NearLabel done, not_found;
+  Label done, not_found;
   // tmp now holds finger offset as a smi.
   ASSERT(kSmiTag == 0 && kSmiTagSize == 1);
   __ movq(tmp, FieldOperand(cache, JSFunctionResultCache::kFingerOffset));
   SmiIndex index =
       __ SmiToIndex(kScratchRegister, tmp, kPointerSizeLog2);
   __ cmpq(key, FieldOperand(cache,
                             index.reg,
                             index.scale,
                             FixedArray::kHeaderSize));
-  __ j(not_equal, &not_found);
+  __ j(not_equal, &not_found, Label::kNear);
   __ movq(rax, FieldOperand(cache,
                             index.reg,
                             index.scale,
                             FixedArray::kHeaderSize + kPointerSize));
-  __ jmp(&done);
+  __ jmp(&done, Label::kNear);
 
   __ bind(&not_found);
   // Call runtime to perform the lookup.
   __ push(cache);
   __ push(key);
   __ CallRuntime(Runtime::kGetFromCache, 2);
 
   __ bind(&done);
   context()->Plug(rax);
 }
 
 
 void FullCodeGenerator::EmitIsRegExpEquivalent(ZoneList<Expression*>* args) {
   ASSERT_EQ(2, args->length());
 
   Register right = rax;
   Register left = rbx;
   Register tmp = rcx;
 
   VisitForStackValue(args->at(0));
   VisitForAccumulatorValue(args->at(1));
   __ pop(left);
 
-  NearLabel done, fail, ok;
+  Label done, fail, ok;
   __ cmpq(left, right);
-  __ j(equal, &ok);
+  __ j(equal, &ok, Label::kNear);
   // Fail if either is a non-HeapObject.
   Condition either_smi = masm()->CheckEitherSmi(left, right, tmp);
-  __ j(either_smi, &fail);
-  __ j(zero, &fail);
+  __ j(either_smi, &fail, Label::kNear);
+  __ j(zero, &fail, Label::kNear);
   __ movq(tmp, FieldOperand(left, HeapObject::kMapOffset));
   __ cmpb(FieldOperand(tmp, Map::kInstanceTypeOffset),
           Immediate(JS_REGEXP_TYPE));
-  __ j(not_equal, &fail);
+  __ j(not_equal, &fail, Label::kNear);
   __ cmpq(tmp, FieldOperand(right, HeapObject::kMapOffset));
-  __ j(not_equal, &fail);
+  __ j(not_equal, &fail, Label::kNear);
   __ movq(tmp, FieldOperand(left, JSRegExp::kDataOffset));
   __ cmpq(tmp, FieldOperand(right, JSRegExp::kDataOffset));
-  __ j(equal, &ok);
+  __ j(equal, &ok, Label::kNear);
   __ bind(&fail);
   __ Move(rax, isolate()->factory()->false_value());
-  __ jmp(&done);
+  __ jmp(&done, Label::kNear);
   __ bind(&ok);
   __ Move(rax, isolate()->factory()->true_value());
   __ bind(&done);
 
   context()->Plug(rax);
 }
 
 
 void FullCodeGenerator::EmitHasCachedArrayIndex(ZoneList<Expression*>* args) {
   ASSERT(args->length() == 1);
@@ skipping 547 matching lines @@
 
   // We need a second deoptimization point after loading the value
   // in case evaluating the property load my have a side effect.
   if (assign_type == VARIABLE) {
     PrepareForBailout(expr->expression(), TOS_REG);
   } else {
     PrepareForBailoutForId(expr->CountId(), TOS_REG);
   }
 
   // Call ToNumber only if operand is not a smi.
-  NearLabel no_conversion;
+  Label no_conversion;
   Condition is_smi;
   is_smi = masm_->CheckSmi(rax);
-  __ j(is_smi, &no_conversion);
+  __ j(is_smi, &no_conversion, Label::kNear);
   ToNumberStub convert_stub;
   __ CallStub(&convert_stub);
   __ bind(&no_conversion);
 
   // Save result for postfix expressions.
   if (expr->is_postfix()) {
     if (!context()->IsEffect()) {
       // Save the result on the stack. If we have a named or keyed property
       // we store the result under the receiver that is currently on top
       // of the stack.
       switch (assign_type) {
         case VARIABLE:
           __ push(rax);
           break;
         case NAMED_PROPERTY:
           __ movq(Operand(rsp, kPointerSize), rax);
           break;
         case KEYED_PROPERTY:
           __ movq(Operand(rsp, 2 * kPointerSize), rax);
           break;
       }
     }
   }
 
   // Inline smi case if we are in a loop.
-  NearLabel stub_call, done;
+  NearLabel done;
+  Label stub_call;
   JumpPatchSite patch_site(masm_);
 
   if (ShouldInlineSmiCase(expr->op())) {
     if (expr->op() == Token::INC) {
       __ SmiAddConstant(rax, rax, Smi::FromInt(1));
     } else {
       __ SmiSubConstant(rax, rax, Smi::FromInt(1));
     }
-    __ j(overflow, &stub_call);
+    __ j(overflow, &stub_call, Label::kNear);
     // We could eliminate this smi check if we split the code at
     // the first smi check before calling ToNumber.
     patch_site.EmitJumpIfSmi(rax, &done);
 
     __ bind(&stub_call);
     // Call stub. Undo operation first.
     if (expr->op() == Token::INC) {
       __ SmiSubConstant(rax, rax, Smi::FromInt(1));
     } else {
       __ SmiAddConstant(rax, rax, Smi::FromInt(1));
@@ skipping 443 matching lines @@
   __ ret(0);
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64