MIPS: Followup 'Introduce BUILTIN_CALL_PAIR.'

src/mips/simulator-mips.cc

Index: src/mips/simulator-mips.cc
diff --git a/src/mips/simulator-mips.cc b/src/mips/simulator-mips.cc
index c81dcd1d00ad32bcf7a34986b00b22c6b1fdf8cc..f0d55d938f65552e69fa107f79a78c69f00eb4f5 100644
--- a/src/mips/simulator-mips.cc
+++ b/src/mips/simulator-mips.cc
@@ -2207,6 +2207,8 @@ void Simulator::SoftwareInterrupt(Instruction* instr) {
       *sim_result = result;
       set_register(v0, arg0);
     } else {
+      DCHECK(redirection->type() == ExternalReference::BUILTIN_CALL ||
+             redirection->type() == ExternalReference::BUILTIN_CALL_PAIR);
       SimulatorRuntimeCall target =
                   reinterpret_cast<SimulatorRuntimeCall>(external);
       if (::v8::internal::FLAG_trace_sim) {