[turbofan] Add TruncateFloat64ToInt32 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 140 matching lines @@
     case kArchDeoptimize: {
       int deoptimization_id = MiscField::decode(instr->opcode());
       BuildTranslation(instr, deoptimization_id);
 
       Address deopt_entry = Deoptimizer::GetDeoptimizationEntry(
           isolate(), deoptimization_id, Deoptimizer::LAZY);
       __ Call(deopt_entry, RelocInfo::RUNTIME_ENTRY);
       DCHECK_EQ(LeaveCC, i.OutputSBit());
       break;
     }
+    case kArchTruncateDoubleToI:
+      __ TruncateDoubleToI(i.OutputRegister(), i.InputDoubleRegister(0));
+      DCHECK_EQ(LeaveCC, i.OutputSBit());
+      break;
     case kArmAdd:
       __ add(i.OutputRegister(), i.InputRegister(0), i.InputOperand2(1),
              i.OutputSBit());
       break;
     case kArmAnd:
       __ and_(i.OutputRegister(), i.InputRegister(0), i.InputOperand2(1),
               i.OutputSBit());
       break;
     case kArmBic:
       __ bic(i.OutputRegister(), i.InputRegister(0), i.InputOperand2(1),
@@ skipping 655 matching lines @@
 
 void CodeGenerator::AddNopForSmiCodeInlining() {
   // On 32-bit ARM we do not insert nops for inlined Smi code.
   UNREACHABLE();
 }
 
 #undef __
 }
 }
 }  // namespace v8::internal::compiler