1 files changed, 10 insertions, 0 deletions
diff --git a/js/src/jit/Lowering.cpp b/js/src/jit/Lowering.cpp
index 034715467..f143ff9e0 100644
--- a/js/src/jit/Lowering.cpp
+++ b/js/src/jit/Lowering.cpp
@@ -4163,6 +4163,16 @@ LIRGenerator::visitIsObject(MIsObject* ins)
 }
 
 void
+LIRGenerator::visitIsNullOrUndefined(MIsNullOrUndefined* ins)
+{
+    MDefinition* opd = ins->input();
+    MOZ_ASSERT(opd->type() == MIRType::Value);
+    LIsNullOrUndefined* lir =
+        new(alloc()) LIsNullOrUndefined(useBoxAtStart(opd));
+    define(lir, ins);
+}
+
+void
 LIRGenerator::visitHasClass(MHasClass* ins)
 {
     MOZ_ASSERT(ins->object()->type() == MIRType::Object);