[turbofan] Introduce initial support for TypedArrays.

src/compiler/instruction-selector.cc

 // Copyright 2014 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 "src/compiler/instruction-selector.h"
 
 #include <limits>
 
 #include "src/base/adapters.h"
 #include "src/compiler/instruction-selector-impl.h"
@@ skipping 281 matching lines @@
 void InstructionSelector::MarkAsDefined(Node* node) {
   DCHECK_NOT_NULL(node);
   size_t const id = node->id();
   DCHECK_LT(id, defined_.size());
   defined_[id] = true;
 }
 
 
 bool InstructionSelector::IsUsed(Node* node) const {
   DCHECK_NOT_NULL(node);
+  // TODO(bmeurer): This is a terrible monster hack, but we have to make sure
+  // that the Retain is actually emitted, otherwise the GC will mess up.
+  if (node->opcode() == IrOpcode::kRetain) return true;
   if (!node->op()->HasProperty(Operator::kEliminatable)) return true;
   size_t const id = node->id();
   DCHECK_LT(id, used_.size());
   return used_[id];
 }
 
 
 void InstructionSelector::MarkAsUsed(Node* node) {
   DCHECK_NOT_NULL(node);
   size_t const id = node->id();
@@ skipping 610 matching lines @@
     case IrOpcode::kFrameState:
     case IrOpcode::kStateValues:
     case IrOpcode::kObjectState:
       return;
     case IrOpcode::kDebugBreak:
       VisitDebugBreak(node);
       return;
     case IrOpcode::kComment:
       VisitComment(node);
       return;
+    case IrOpcode::kRetain:
+      VisitRetain(node);
+      return;
     case IrOpcode::kLoad: {
       LoadRepresentation type = LoadRepresentationOf(node->op());
       MarkAsRepresentation(type.representation(), node);
       return VisitLoad(node);
     }
     case IrOpcode::kStore:
       return VisitStore(node);
     case IrOpcode::kWord32And:
       return MarkAsWord32(node), VisitWord32And(node);
     case IrOpcode::kWord32Or:
@@ skipping 348 matching lines @@
       MarkAsWord32(NodeProperties::FindProjection(node, 0));
       MarkAsWord32(NodeProperties::FindProjection(node, 1));
       return VisitWord32PairSar(node);
     case IrOpcode::kAtomicLoad: {
       LoadRepresentation type = LoadRepresentationOf(node->op());
       MarkAsRepresentation(type.representation(), node);
       return VisitAtomicLoad(node);
     }
     case IrOpcode::kAtomicStore:
       return VisitAtomicStore(node);
+    case IrOpcode::kUnsafePointerAdd:
+      MarkAsRepresentation(MachineType::PointerRepresentation(), node);
+      return VisitUnsafePointerAdd(node);
     default:
       V8_Fatal(__FILE__, __LINE__, "Unexpected operator #%d:%s @ node #%d",
                node->opcode(), node->op()->mnemonic(), node->id());
       break;
   }
 }
 
 void InstructionSelector::VisitImpossibleToWord32(Node* node) {
   OperandGenerator g(this);
   Emit(kArchImpossible, g.DefineAsConstant(node, Constant(0)));
@@ skipping 699 matching lines @@
   OperandGenerator g(this);
   Emit(kArchDebugBreak, g.NoOutput());
 }
 
 void InstructionSelector::VisitComment(Node* node) {
   OperandGenerator g(this);
   InstructionOperand operand(g.UseImmediate(node));
   Emit(kArchComment, 0, nullptr, 1, &operand);
 }
 
+void InstructionSelector::VisitUnsafePointerAdd(Node* node) {
+#if V8_TARGET_ARCH_64_BIT
+  VisitInt64Add(node);
+#else   // V8_TARGET_ARCH_64_BIT
+  VisitInt32Add(node);
+#endif  // V8_TARGET_ARCH_64_BIT
+}
+
+void InstructionSelector::VisitRetain(Node* node) {
+  OperandGenerator g(this);
+  Emit(kArchNop, g.NoOutput(), g.UseAny(node->InputAt(0)));
+}
+
 bool InstructionSelector::CanProduceSignalingNaN(Node* node) {
   // TODO(jarin) Improve the heuristic here.
   if (node->opcode() == IrOpcode::kFloat64Add ||
       node->opcode() == IrOpcode::kFloat64Sub ||
       node->opcode() == IrOpcode::kFloat64Mul) {
     return false;
   }
   return true;
 }
 
@@ skipping 22 matching lines @@
   return new (instruction_zone()) FrameStateDescriptor(
       instruction_zone(), state_info.type(), state_info.bailout_id(),
       state_info.state_combine(), parameters, locals, stack,
       state_info.shared_info(), outer_state);
 }
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8