src/v8/src/compiler/raw-machine-assembler.cc

   1 // Copyright 2014 the V8 project authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "src/code-factory.h"
   6 #include "src/compiler/pipeline.h"
   7 #include "src/compiler/raw-machine-assembler.h"
   8 #include "src/compiler/scheduler.h"
   9
  10 namespace v8 {
  11 namespace internal {
  12 namespace compiler {
  13
  14 RawMachineAssembler::RawMachineAssembler(Graph* graph,
  15                                          MachineSignature* machine_sig,
  16                                          MachineType word,
  17                                          MachineOperatorBuilder::Flags flags)
  18     : GraphBuilder(graph),
  19       schedule_(new (zone()) Schedule(zone())),
  20       machine_(word, flags),
  21       common_(zone()),
  22       machine_sig_(machine_sig),
  23       call_descriptor_(
  24           Linkage::GetSimplifiedCDescriptor(graph->zone(), machine_sig)),
  25       parameters_(NULL),
  26       exit_label_(schedule()->end()),
  27       current_block_(schedule()->start()) {
  28   int param_count = static_cast<int>(parameter_count());
  29   Node* s = graph->NewNode(common_.Start(param_count));
  30   graph->SetStart(s);
  31   if (parameter_count() == 0) return;
  32   parameters_ = zone()->NewArray<Node*>(param_count);
  33   for (size_t i = 0; i < parameter_count(); ++i) {
  34     parameters_[i] =
  35         NewNode(common()->Parameter(static_cast<int>(i)), graph->start());
  36   }
  37 }
  38
  39
  40 Schedule* RawMachineAssembler::Export() {
  41   // Compute the correct codegen order.
  42   DCHECK(schedule_->rpo_order()->empty());
  43   ZonePool zone_pool(isolate());
  44   Scheduler::ComputeSpecialRPO(&zone_pool, schedule_);
  45   // Invalidate MachineAssembler.
  46   Schedule* schedule = schedule_;
  47   schedule_ = NULL;
  48   return schedule;
  49 }
  50
  51
  52 Node* RawMachineAssembler::Parameter(size_t index) {
  53   DCHECK(index < parameter_count());
  54   return parameters_[index];
  55 }
  56
  57
  58 RawMachineAssembler::Label* RawMachineAssembler::Exit() {
  59   exit_label_.used_ = true;
  60   return &exit_label_;
  61 }
  62
  63
  64 void RawMachineAssembler::Goto(Label* label) {
  65   DCHECK(current_block_ != schedule()->end());
  66   schedule()->AddGoto(CurrentBlock(), Use(label));
  67   current_block_ = NULL;
  68 }
  69
  70
  71 void RawMachineAssembler::Branch(Node* condition, Label* true_val,
  72                                  Label* false_val) {
  73   DCHECK(current_block_ != schedule()->end());
  74   Node* branch = NewNode(common()->Branch(), condition);
  75   schedule()->AddBranch(CurrentBlock(), branch, Use(true_val), Use(false_val));
  76   current_block_ = NULL;
  77 }
  78
  79
  80 void RawMachineAssembler::Return(Node* value) {
  81   schedule()->AddReturn(CurrentBlock(), value);
  82   current_block_ = NULL;
  83 }
  84
  85
  86 Node* RawMachineAssembler::CallFunctionStub0(Node* function, Node* receiver,
  87                                              Node* context, Node* frame_state,
  88                                              CallFunctionFlags flags) {
  89   Callable callable = CodeFactory::CallFunction(isolate(), 0, flags);
  90   CallDescriptor* desc = Linkage::GetStubCallDescriptor(
  91       callable.descriptor(), 1, CallDescriptor::kNeedsFrameState, zone());
  92   Node* stub_code = HeapConstant(callable.code());
  93   Node* call = graph()->NewNode(common()->Call(desc), stub_code, function,
  94                                 receiver, context, frame_state);
  95   schedule()->AddNode(CurrentBlock(), call);
  96   return call;
  97 }
  98
  99
 100 Node* RawMachineAssembler::CallJS0(Node* function, Node* receiver,
 101                                    Node* context, Node* frame_state) {
 102   CallDescriptor* descriptor =
 103       Linkage::GetJSCallDescriptor(1, zone(), CallDescriptor::kNeedsFrameState);
 104   Node* call = graph()->NewNode(common()->Call(descriptor), function, receiver,
 105                                 context, frame_state);
 106   schedule()->AddNode(CurrentBlock(), call);
 107   return call;
 108 }
 109
 110
 111 Node* RawMachineAssembler::CallRuntime1(Runtime::FunctionId function,
 112                                         Node* arg0, Node* context,
 113                                         Node* frame_state) {
 114   CallDescriptor* descriptor = Linkage::GetRuntimeCallDescriptor(
 115       function, 1, Operator::kNoProperties, zone());
 116
 117   Node* centry = HeapConstant(CEntryStub(isolate(), 1).GetCode());
 118   Node* ref = NewNode(
 119       common()->ExternalConstant(ExternalReference(function, isolate())));
 120   Node* arity = Int32Constant(1);
 121
 122   Node* call = graph()->NewNode(common()->Call(descriptor), centry, arg0, ref,
 123                                 arity, context, frame_state);
 124   schedule()->AddNode(CurrentBlock(), call);
 125   return call;
 126 }
 127
 128
 129 void RawMachineAssembler::Bind(Label* label) {
 130   DCHECK(current_block_ == NULL);
 131   DCHECK(!label->bound_);
 132   label->bound_ = true;
 133   current_block_ = EnsureBlock(label);
 134 }
 135
 136
 137 BasicBlock* RawMachineAssembler::Use(Label* label) {
 138   label->used_ = true;
 139   return EnsureBlock(label);
 140 }
 141
 142
 143 BasicBlock* RawMachineAssembler::EnsureBlock(Label* label) {
 144   if (label->block_ == NULL) label->block_ = schedule()->NewBasicBlock();
 145   return label->block_;
 146 }
 147
 148
 149 BasicBlock* RawMachineAssembler::CurrentBlock() {
 150   DCHECK(current_block_);
 151   return current_block_;
 152 }
 153
 154
 155 Node* RawMachineAssembler::MakeNode(const Operator* op, int input_count,
 156                                     Node** inputs, bool incomplete) {
 157   DCHECK(ScheduleValid());
 158   DCHECK(current_block_ != NULL);
 159   Node* node = graph()->NewNode(op, input_count, inputs, incomplete);
 160   BasicBlock* block = op->opcode() == IrOpcode::kParameter ? schedule()->start()
 161                                                            : CurrentBlock();
 162   schedule()->AddNode(block, node);
 163   return node;
 164 }
 165
 166 }  // namespace compiler
 167 }  // namespace internal
 168 }  // namespace v8