[wasm] Int64Lowering of Int64Sub on ia32 and arm.

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 6e844135decf95bd847de1601704a1f2144a2f09..4c13fcc660b2dc07b0d19658609ae7411da97730 100644
--- a/src/compiler/mips/instruction-selector-mips.cc
+++ b/src/compiler/mips/instruction-selector-mips.cc
@@ -397,6 +397,8 @@ void InstructionSelector::VisitWord32Sar(Node* node) {
 
 void InstructionSelector::VisitInt32PairAdd(Node* node) { UNIMPLEMENTED(); }
 
+void InstructionSelector::VisitInt32PairSub(Node* node) { UNIMPLEMENTED(); }
+
 void InstructionSelector::VisitWord32PairShl(Node* node) { UNIMPLEMENTED(); }
 
 void InstructionSelector::VisitWord32PairShr(Node* node) { UNIMPLEMENTED(); }