Use GPRs for mints

runtime/vm/flow_graph_compiler.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_XXX.
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/cha.h"
 #include "vm/dart_entry.h"
@@ skipping 543 matching lines @@
               bitmap->Set(bitmap->Length(), false);
             }
           }
         }
       }
       // General purpose registers have the lowest register number at the
       // highest address (i.e., first in the stackmap).
       for (intptr_t i = 0; i < kNumberOfCpuRegisters; ++i) {
         Register reg = static_cast<Register>(i);
         if (locs->live_registers()->ContainsRegister(reg)) {
-          bitmap->Set(bitmap->Length(), true);
+          bitmap->Set(bitmap->Length(), locs->live_registers()->IsTagged(reg));
         }
       }
     }
 
     intptr_t register_bit_count = bitmap->Length() - StackSize();
     stackmap_table_builder_->AddEntry(assembler()->CodeSize(),
                                       bitmap,
                                       register_bit_count);
   }
 }
@@ skipping 50 matching lines @@
     if (loc.IsRegister()) {
       intptr_t index = cpu_reg_slots[loc.reg()];
       ASSERT(index >= 0);
       it.SetCurrentLocation(Location::StackSlot(index));
     } else if (loc.IsFpuRegister()) {
       intptr_t index = fpu_reg_slots[loc.fpu_reg()];
       ASSERT(index >= 0);
       Value* value = it.CurrentValue();
       switch (value->definition()->representation()) {
         case kUnboxedDouble:
-        case kUnboxedMint:
           it.SetCurrentLocation(Location::DoubleStackSlot(index));
           break;
         case kUnboxedFloat32x4:
         case kUnboxedInt32x4:
         case kUnboxedFloat64x2:
           it.SetCurrentLocation(Location::QuadStackSlot(index));
           break;
         default:
           UNREACHABLE();
       }
+    } else if (loc.IsPairLocation()) {
+      intptr_t representation =
+          it.CurrentValue()->definition()->representation();
+      ASSERT(representation == kUnboxedMint);
+      PairLocation* value_pair = loc.AsPairLocation();
+      intptr_t index_lo;
+      intptr_t index_hi;
+      if (value_pair->At(0).IsRegister()) {
+        index_lo = cpu_reg_slots[value_pair->At(0).reg()];
+      } else {
+        ASSERT(value_pair->At(0).IsStackSlot());
+        index_lo = value_pair->At(0).stack_index();
+      }
+      if (value_pair->At(1).IsRegister()) {
+        index_hi = cpu_reg_slots[value_pair->At(1).reg()];
+      } else {
+        ASSERT(value_pair->At(1).IsStackSlot());
+        index_hi = value_pair->At(1).stack_index();
+      }
+      it.SetCurrentLocation(Location::Pair(Location::StackSlot(index_lo),
+                                           Location::StackSlot(index_hi)));
     } else if (loc.IsInvalid()) {
       Definition* def =
           it.CurrentValue()->definition();
       ASSERT(def != NULL);
       if (def->IsMaterializeObject()) {
         def->AsMaterializeObject()->RemapRegisters(fpu_reg_slots,
                                                    cpu_reg_slots);
       }
     }
   }
@@ skipping 669 matching lines @@
 
   for (int i = 0; i < len; i++) {
     sorted->Add(CidTarget(ic_data.GetReceiverClassIdAt(i),
                           &Function::ZoneHandle(ic_data.GetTargetAt(i)),
                           ic_data.GetCountAt(i)));
   }
   sorted->Sort(HighestCountFirst);
 }
 
 }  // namespace dart