[turbofan] Add TruncateFloat64ToInt32 machine operator.

src/compiler/ia32/code-generator-ia32.cc

 // Copyright 2013 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/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
@@ skipping 111 matching lines @@
       break;
     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);
       break;
     }
+    case kArchTruncateDoubleToI:
+      __ TruncateDoubleToI(i.OutputRegister(), i.InputDoubleRegister(0));
+      break;
     case kIA32Add:
       if (HasImmediateInput(instr, 1)) {
         __ add(i.InputOperand(0), i.InputImmediate(1));
       } else {
         __ add(i.InputRegister(0), i.InputOperand(1));
       }
       break;
     case kIA32And:
       if (HasImmediateInput(instr, 1)) {
         __ and_(i.InputOperand(0), i.InputImmediate(1));
@@ skipping 799 matching lines @@
 }
 
 
 void CodeGenerator::AddNopForSmiCodeInlining() { __ nop(); }
 
 #undef __
 
 }
 }
 }  // namespace v8::internal::compiler