[turbofan] Add Int64(Add|Sub)WithOverflow support.

src/compiler/x64/instruction-selector-x64.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 <algorithm>
 
 #include "src/base/adapters.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
@@ skipping 633 matching lines @@
   // No leal pattern match, use addl
   VisitBinop(this, node, kX64Add32);
 }
 
 
 void InstructionSelector::VisitInt64Add(Node* node) {
   VisitBinop(this, node, kX64Add);
 }
 
 
+void InstructionSelector::VisitInt64AddWithOverflow(Node* node) {
+  if (Node* ovf = NodeProperties::FindProjection(node, 1)) {
+    FlagsContinuation cont(kOverflow, ovf);
+    VisitBinop(this, node, kX64Add, &cont);
+  }
+  FlagsContinuation cont;
+  VisitBinop(this, node, kX64Add, &cont);
+}
+
+
 void InstructionSelector::VisitInt32Sub(Node* node) {
   X64OperandGenerator g(this);
   Int32BinopMatcher m(node);
   if (m.left().Is(0)) {
     Emit(kX64Neg32, g.DefineSameAsFirst(node), g.UseRegister(m.right().node()));
   } else {
     if (m.right().HasValue() && g.CanBeImmediate(m.right().node())) {
       // Turn subtractions of constant values into immediate "leal" instructions
       // by negating the value.
       Emit(kX64Lea32 | AddressingModeField::encode(kMode_MRI),
@@ skipping 10 matching lines @@
   X64OperandGenerator g(this);
   Int64BinopMatcher m(node);
   if (m.left().Is(0)) {
     Emit(kX64Neg, g.DefineSameAsFirst(node), g.UseRegister(m.right().node()));
   } else {
     VisitBinop(this, node, kX64Sub);
   }
 }
 
 
+void InstructionSelector::VisitInt64SubWithOverflow(Node* node) {
+  if (Node* ovf = NodeProperties::FindProjection(node, 1)) {
+    FlagsContinuation cont(kOverflow, ovf);
+    return VisitBinop(this, node, kX64Sub, &cont);
+  }
+  FlagsContinuation cont;
+  VisitBinop(this, node, kX64Sub, &cont);
+}
+
+
 namespace {
 
 void VisitMul(InstructionSelector* selector, Node* node, ArchOpcode opcode) {
   X64OperandGenerator g(selector);
   Int32BinopMatcher m(node);
   Node* left = m.left().node();
   Node* right = m.right().node();
   if (g.CanBeImmediate(right)) {
     selector->Emit(opcode, g.DefineAsRegister(node), g.Use(left),
                    g.UseImmediate(right));
@@ skipping 792 matching lines @@
           Node* const node = value->InputAt(0);
           Node* const result = NodeProperties::FindProjection(node, 0);
           if (result == NULL || IsDefined(result)) {
             switch (node->opcode()) {
               case IrOpcode::kInt32AddWithOverflow:
                 cont.OverwriteAndNegateIfEqual(kOverflow);
                 return VisitBinop(this, node, kX64Add32, &cont);
               case IrOpcode::kInt32SubWithOverflow:
                 cont.OverwriteAndNegateIfEqual(kOverflow);
                 return VisitBinop(this, node, kX64Sub32, &cont);
+              case IrOpcode::kInt64AddWithOverflow:
+                cont.OverwriteAndNegateIfEqual(kOverflow);
+                return VisitBinop(this, node, kX64Add, &cont);
+              case IrOpcode::kInt64SubWithOverflow:
+                cont.OverwriteAndNegateIfEqual(kOverflow);
+                return VisitBinop(this, node, kX64Sub, &cont);
               default:
                 break;
             }
           }
         }
         break;
       case IrOpcode::kInt32Sub:
         return VisitWordCompare(this, value, kX64Cmp32, &cont);
       case IrOpcode::kInt64Sub:
         return VisitWord64Compare(this, value, &cont);
@@ skipping 264 matching lines @@
              MachineOperatorBuilder::kFloat64RoundTruncate |
              MachineOperatorBuilder::kFloat32RoundTiesEven |
              MachineOperatorBuilder::kFloat64RoundTiesEven;
   }
   return flags;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8