Don't MISS if you read the hole from certain FastHoley arrays.

src/mips64/lithium-codegen-mips64.cc

Index: src/mips64/lithium-codegen-mips64.cc
diff --git a/src/mips64/lithium-codegen-mips64.cc b/src/mips64/lithium-codegen-mips64.cc
index d6039f71126f28c82d2ccde87cb45664a6a228a2..c7dd637c24a4e708b9178a5bb85f5d54a5dd032b 100644
--- a/src/mips64/lithium-codegen-mips64.cc
+++ b/src/mips64/lithium-codegen-mips64.cc
@@ -3334,6 +3334,23 @@ void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
       __ LoadRoot(scratch, Heap::kTheHoleValueRootIndex);
       DeoptimizeIf(eq, instr, Deoptimizer::kHole, result, Operand(scratch));
     }
+  } else if (instr->hydrogen()->hole_mode() == CONVERT_HOLE_TO_UNDEFINED) {
+    DCHECK(instr->hydrogen()->elements_kind() == FAST_HOLEY_ELEMENTS);
+    Label done;
+    __ LoadRoot(scratch, Heap::kTheHoleValueRootIndex);
+    __ Branch(&done, ne, result, Operand(scratch));
+    if (info()->IsStub()) {
+      // A stub can safely convert the hole to undefined only if the array
+      // protector cell contains (Smi) Isolate::kArrayProtectorValid. Otherwise
+      // it needs to bail out.
+      __ LoadRoot(result, Heap::kArrayProtectorRootIndex);
+      // The comparison only needs LS bits of value, which is a smi.
+      __ ld(result, FieldMemOperand(result, Cell::kValueOffset));
+      DeoptimizeIf(ne, instr, Deoptimizer::kHole, result,
+                   Operand(Smi::FromInt(Isolate::kArrayProtectorValid)));
+    }
+    __ LoadRoot(result, Heap::kUndefinedValueRootIndex);
+    __ bind(&done);
   }
 }