Allow deferred handle dereference in EmitLoadRegister to retrieve number.

src/mips64/lithium-codegen-mips64.cc

 // Copyright 2012 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/v8.h"
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/cpu-profiler.h"
 #include "src/hydrogen-osr.h"
@@ skipping 389 matching lines @@
 
 Register LCodeGen::EmitLoadRegister(LOperand* op, Register scratch) {
   if (op->IsRegister()) {
     return ToRegister(op->index());
   } else if (op->IsConstantOperand()) {
     LConstantOperand* const_op = LConstantOperand::cast(op);
     HConstant* constant = chunk_->LookupConstant(const_op);
     Handle<Object> literal = constant->handle(isolate());
     Representation r = chunk_->LookupLiteralRepresentation(const_op);
     if (r.IsInteger32()) {
+      AllowDeferredHandleDereference get_number;
       DCHECK(literal->IsNumber());
       __ li(scratch, Operand(static_cast<int32_t>(literal->Number())));
     } else if (r.IsSmi()) {
       DCHECK(constant->HasSmiValue());
       __ li(scratch, Operand(Smi::FromInt(constant->Integer32Value())));
     } else if (r.IsDouble()) {
       Abort(kEmitLoadRegisterUnsupportedDoubleImmediate);
     } else {
       DCHECK(r.IsSmiOrTagged());
       __ li(scratch, literal);
@@ skipping 5790 matching lines @@
   __ Push(at, ToRegister(instr->function()));
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8