[turbofan] Added the optional Float64RoundUp operator to turbofan.

src/compiler/mips/instruction-selector-mips.cc

Index: src/compiler/mips/instruction-selector-mips.cc
diff --git a/src/compiler/mips/instruction-selector-mips.cc b/src/compiler/mips/instruction-selector-mips.cc
index b43edb17cdf3601d8aca14eb9ad3646b1df3e12a..9903bdbbf265784af28561f4b5d86cdb007ff239 100644
--- a/src/compiler/mips/instruction-selector-mips.cc
+++ b/src/compiler/mips/instruction-selector-mips.cc
@@ -588,6 +588,9 @@ void InstructionSelector::VisitFloat64RoundDown(Node* node) {
 }
 
 
+void InstructionSelector::VisitFloat64RoundUp(Node* node) { UNREACHABLE(); }
+
+
 void InstructionSelector::VisitFloat64RoundTruncate(Node* node) {
   VisitRR(this, kMipsFloat64RoundTruncate, node);
 }