MIPS: Lattice-based representation inference, powered by left/right specific type feedback for Bina…

src/mips/ic-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1677 matching lines @@
       return le;
     case Token::GTE:
       return ge;
     default:
       UNREACHABLE();
       return kNoCondition;
   }
 }
 
 
-void CompareIC::UpdateCaches(Handle<Object> x, Handle<Object> y) {
-  HandleScope scope;
-  Handle<Code> rewritten;
-  State previous_state = GetState();
-  State state = TargetState(previous_state, false, x, y);
-  if (state == GENERIC) {
-    CompareStub stub(GetCondition(), strict(), NO_COMPARE_FLAGS, a1, a0);
-    rewritten = stub.GetCode();
-  } else {
-    ICCompareStub stub(op_, state);
-    if (state == KNOWN_OBJECTS) {
-      stub.set_known_map(Handle<Map>(Handle<JSObject>::cast(x)->map()));
-    }
-    rewritten = stub.GetCode();
-  }
-  set_target(*rewritten);
+bool CompareIC::HasInlinedSmiCode(Address address) {
+  // The address of the instruction following the call.
+  Address andi_instruction_address =
+      address + Assembler::kCallTargetAddressOffset;
 
-#ifdef DEBUG
-  if (FLAG_trace_ic) {
-    PrintF("[CompareIC (%s->%s)#%s]\n",
-           GetStateName(previous_state),
-           GetStateName(state),
-           Token::Name(op_));
-  }
-#endif
-
-  // Activate inlined smi code.
-  if (previous_state == UNINITIALIZED) {
-    PatchInlinedSmiCode(address(), ENABLE_INLINED_SMI_CHECK);
-  }
+  // If the instruction following the call is not a andi at, rx, #yyy, nothing
+  // was inlined.
+  Instr instr = Assembler::instr_at(andi_instruction_address);
+  return Assembler::IsAndImmediate(instr) &&
+      Assembler::GetRt(instr) == (uint32_t)zero_reg.code();
 }
 
 
 void PatchInlinedSmiCode(Address address, InlinedSmiCheck check) {
   Address andi_instruction_address =
       address + Assembler::kCallTargetAddressOffset;
 
   // If the instruction following the call is not a andi at, rx, #yyy, nothing
   // was inlined.
   Instr instr = Assembler::instr_at(andi_instruction_address);
@@ skipping 49 matching lines @@
   } else {
     ASSERT(Assembler::IsBne(branch_instr));
     patcher.ChangeBranchCondition(eq);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS