DBC: CheckClassInstr

runtime/vm/simulator_dbc.cc

Index: runtime/vm/simulator_dbc.cc
diff --git a/runtime/vm/simulator_dbc.cc b/runtime/vm/simulator_dbc.cc
index 1938950cebf21817fa52746ec83d614fc136e32f..e3a25ed774bc1b2dd59e0b28d0a7966d5a341446 100644
--- a/runtime/vm/simulator_dbc.cc
+++ b/runtime/vm/simulator_dbc.cc
@@ -21,6 +21,7 @@
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
 #include "vm/disassembler.h"
+#include "vm/flow_graph_compiler.h"
 #include "vm/lockers.h"
 #include "vm/native_arguments.h"
 #include "vm/native_entry.h"
@@ -1978,6 +1979,86 @@ RawObject* Simulator::Call(const Code& code,
   }
 
   {
+    BYTECODE(CheckNull, A_D);
+    RawObject* obj = FP[rA];
+    if (((rD == 1) && (obj != null_value)) ||
+        ((rD == 0) && (obj == null_value))) {
+      pc++;
+    }
+    DISPATCH();
+  }
+
+  {
+    BYTECODE(CheckDenseSwitchTOS, A_D);
+    const intptr_t cid_mask = Smi::Value(RAW_CAST(Smi, *SP--));
+    const intptr_t cid_min = Smi::Value(RAW_CAST(Smi, *SP--));
+    const ICData& ic_data =
+        ICData::Handle(RAW_CAST(ICData, LOAD_CONSTANT(rD)));
+    const intptr_t value = reinterpret_cast<intptr_t>(FP[rA]);
+    const bool is_smi = ((value & kSmiTagMask) == kSmiTag);
+    if (is_smi) {
+      //OS::PrintErr("CheckDenseSwitchTOS: Smi\n");
+      if (ic_data.GetReceiverClassIdAt(0) == kSmiCid) {
+        //OS::PrintErr("\tCheckDenseSwitchTOS: receiver is smi\n");
+        pc++;
+      } else {
+        //OS::PrintErr("\tCheckDenseSwitchTOS: receiver is NOT smi\n");
+      }
+    } else {
+      const intptr_t cid_max = Utils::HighestBit(cid_mask) + cid_min;
+      const intptr_t cid = SimulatorHelpers::GetClassId(FP[rA]);
+      //OS::PrintErr("\tCheckDenseSwitchTOS: cid_min = %ld, cid_max = %ld, cid = %ld\n",
+          //cid_min, cid_max, cid);
+      // The cid is in-bounds, and the bit is set in the mask.
+      if ((cid >= cid_min) && (cid <= cid_max) &&
+          ((cid_mask & (1 << (cid - cid_min))) != 0)) {
+        //OS::PrintErr("\tCheckDenseSwitchTOS: Good\n");
+        pc++;
+      } else {
+        //OS::PrintErr("\tCheckDenseSwitchTOS: Not Good\n");
+      }
+    }
+    DISPATCH();
+  }
+
+  {
+    BYTECODE(CheckForCid, A_D);
+    const ICData& ic_data =
+        ICData::Handle(RAW_CAST(ICData, LOAD_CONSTANT(rD)));
+    const intptr_t value = reinterpret_cast<intptr_t>(FP[rA]);
+    const bool is_smi = ((value & kSmiTagMask) == kSmiTag);
+    if (is_smi) {
+      //OS::PrintErr("CheckForCid: Smi\n");
+      if (ic_data.GetReceiverClassIdAt(0) == kSmiCid) {
+        //OS::PrintErr("\tCheckForCid: receiver is smi\n");
+        pc++;
+      } else {
+        //OS::PrintErr("\tCheckForCid: receiver is not smi\n");
+      }
+    } else {
+      const intptr_t cid = SimulatorHelpers::GetClassId(FP[rA]);
+      GrowableArray<CidTarget> sorted_ic_data;
+      FlowGraphCompiler::SortICDataByCount(ic_data,
+                                           &sorted_ic_data,
+                                           /* drop_smi = */ true);
+      const intptr_t num_checks = sorted_ic_data.length();
+      //OS::PrintErr("CheckForCid: cid = %ld, num_checks = %ld\n",
+          //cid, num_checks);
+      for (intptr_t i = 0; i < num_checks; i++) {
+        const intptr_t data_cid = sorted_ic_data[i].cid;
+        //OS::PrintErr("\tCheckForCid: looking at %ld\n", data_cid);
+        ASSERT(cid != kSmiCid);
+        if (cid == data_cid) {
+          //OS::PrintErr("\tCheckForCid: Found\n");
+          pc++;
+          break;
+        }
+      }
+    }
+    DISPATCH();
+  }
+
+  {
     BYTECODE(IfEqStrictTOS, 0);
     SP -= 2;
     if (SP[1] != SP[2]) {
@@ -2116,6 +2197,8 @@ RawObject* Simulator::Call(const Code& code,
     BYTECODE(Deopt, A_D);
     const bool is_lazy = rD == 0;
 
+    //OS::PrintErr("Deopt instr pc = %p\n", pc - 1);
+
     // Preserve result of the previous call.
     // TODO(vegorov) we could have actually included result into the
     // deoptimization environment because it is passed through the stack.