Allow deferred handle dereference in EmitLoadRegister to retrieve number.

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index 747730b3f5132e24e5b87ecb73a7d9e989b93b4d..c56206a9ea899a80dfec0fa8b0c66d2a0dd449b4 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -427,6 +427,7 @@ Register LCodeGen::EmitLoadRegister(LOperand* op, Register scratch) {
     Handle<Object> literal = constant->handle(isolate());
     Representation r = chunk_->LookupLiteralRepresentation(const_op);
     if (r.IsInteger32()) {
+      AllowDeferredHandleDereference get_number;
       DCHECK(literal->IsNumber());
       __ mov(scratch, Operand(static_cast<int32_t>(literal->Number())));
     } else if (r.IsDouble()) {