MIPS: Use weak cell to embed known map in CompareIC

src/mips/code-stubs-mips.cc

Index: src/mips/code-stubs-mips.cc
diff --git a/src/mips/code-stubs-mips.cc b/src/mips/code-stubs-mips.cc
index 00d9c3c3f23234c9c0e6193f4d54a8a66e600969..b0b3272a19384499bf7287a1bf8c724ebe770e69 100644
--- a/src/mips/code-stubs-mips.cc
+++ b/src/mips/code-stubs-mips.cc
@@ -3856,12 +3856,14 @@ void CompareICStub::GenerateObjects(MacroAssembler* masm) {
 
 void CompareICStub::GenerateKnownObjects(MacroAssembler* masm) {
   Label miss;
+  Handle<WeakCell> cell = Map::WeakCellForMap(known_map_);
   __ And(a2, a1, a0);
   __ JumpIfSmi(a2, &miss);
+  __ GetWeakValue(t0, cell);
   __ lw(a2, FieldMemOperand(a0, HeapObject::kMapOffset));
   __ lw(a3, FieldMemOperand(a1, HeapObject::kMapOffset));
-  __ Branch(&miss, ne, a2, Operand(known_map_));
-  __ Branch(&miss, ne, a3, Operand(known_map_));
+  __ Branch(&miss, ne, a2, Operand(t0));
+  __ Branch(&miss, ne, a3, Operand(t0));
 
   __ Ret(USE_DELAY_SLOT);
   __ subu(v0, a0, a1);