Use weak cell in monomorphic KeyedStore IC.

src/mips64/macro-assembler-mips64.cc

Index: src/mips64/macro-assembler-mips64.cc
diff --git a/src/mips64/macro-assembler-mips64.cc b/src/mips64/macro-assembler-mips64.cc
index f04331d0e2fb88559643ef3baf37f5926c9722a0..2de1c2a1a9edf33c66a4497c3b63759018a9d7e3 100644
--- a/src/mips64/macro-assembler-mips64.cc
+++ b/src/mips64/macro-assembler-mips64.cc
@@ -3965,17 +3965,17 @@ void MacroAssembler::CheckMap(Register obj,
 }
 
 
-void MacroAssembler::DispatchMap(Register obj,
-                                 Register scratch,
-                                 Handle<Map> map,
-                                 Handle<Code> success,
-                                 SmiCheckType smi_check_type) {
+void MacroAssembler::DispatchWeakMap(Register obj, Register scratch1,
+                                     Register scratch2, Handle<WeakCell> cell,
+                                     Handle<Code> success,
+                                     SmiCheckType smi_check_type) {
   Label fail;
   if (smi_check_type == DO_SMI_CHECK) {
     JumpIfSmi(obj, &fail);
   }
-  ld(scratch, FieldMemOperand(obj, HeapObject::kMapOffset));
-  Jump(success, RelocInfo::CODE_TARGET, eq, scratch, Operand(map));
+  ld(scratch1, FieldMemOperand(obj, HeapObject::kMapOffset));
+  GetWeakValue(scratch2, cell);
+  Jump(success, RelocInfo::CODE_TARGET, eq, scratch1, Operand(scratch2));
   bind(&fail);
 }