[turbofan] Add Int32AddWithOverflow machine operator.

src/compiler/arm/code-generator-arm.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/code-generator.h"
 
 #include "src/arm/macro-assembler-arm.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 483 matching lines @@
     // Fall through.
     case kUnsignedLessThanOrEqual:
       __ b(ls, tlabel);
       break;
     case kUnorderedGreaterThan:
       __ b(vs, tlabel);
     // Fall through.
     case kUnsignedGreaterThan:
       __ b(hi, tlabel);
       break;
+    case kOverflow:
+      __ b(vs, tlabel);
+      break;
+    case kNotOverflow:
+      __ b(vc, tlabel);
+      break;
   }
   if (!fallthru) __ b(flabel);  // no fallthru to flabel.
   __ bind(&done);
 }
 
 
 // Assembles boolean materializations after an instruction.
 void CodeGenerator::AssembleArchBoolean(Instruction* instr,
                                         FlagsCondition condition) {
   ArmOperandConverter i(this, instr);
   Label done;
 
-  // Materialize a full 32-bit 1 or 0 value.
+  // Materialize a full 32-bit 1 or 0 value. The result register is always the
+  // last output of the instruction.
   Label check;
-  Register reg = i.OutputRegister();
+  ASSERT_NE(0, instr->OutputCount());
+  Register reg = i.OutputRegister(instr->OutputCount() - 1);
   Condition cc = kNoCondition;
   switch (condition) {
     case kUnorderedEqual:
       __ b(vc, &check);
       __ mov(reg, Operand(0));
       __ b(&done);
     // Fall through.
     case kEqual:
       cc = eq;
       break;
@@ skipping 42 matching lines @@
       cc = ls;
       break;
     case kUnorderedGreaterThan:
       __ b(vc, &check);
       __ mov(reg, Operand(1));
       __ b(&done);
     // Fall through.
     case kUnsignedGreaterThan:
       cc = hi;
       break;
+    case kOverflow:
+      cc = vs;
+      break;
+    case kNotOverflow:
+      cc = vc;
+      break;
   }
   __ bind(&check);
   __ mov(reg, Operand(0));
   __ mov(reg, Operand(1), LeaveCC, cc);
   __ bind(&done);
 }
 
 
 void CodeGenerator::AssemblePrologue() {
   CallDescriptor* descriptor = linkage()->GetIncomingDescriptor();
@@ skipping 234 matching lines @@
                                             int end_pc) {
   return false;
 }
 
 #endif  // DEBUG
 
 #undef __
 }
 }
 }  // namespace v8::internal::compiler