Fix builds on Mac: icount_ is intptr_t.

runtime/vm/simulator_arm.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 <setjmp.h>
 #include <stdlib.h>
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM)
 
@@ skipping 3563 matching lines @@
       UnimplementedInstruction(instr);
     }
   }
 }
 
 
 // Executes the current instruction.
 void Simulator::InstructionDecode(Instr* instr) {
   pc_modified_ = false;
   if (IsTracingExecution()) {
-    OS::Print("%u ", icount_);
+    OS::Print("%" Pd " ", icount_);
     const uword start = reinterpret_cast<uword>(instr);
     const uword end = start + Instr::kInstrSize;
     Disassembler::Disassemble(start, end);
   }
   if (instr->ConditionField() == kSpecialCondition) {
     if (instr->InstructionBits() == static_cast<int32_t>(0xf57ff01f)) {
       // Format(instr, "clrex");
       ClearExclusive();
     } else {
       if (instr->IsSIMDDataProcessing()) {
@@ skipping 63 matching lines @@
         InstructionDecode(instr);
       }
       program_counter = get_pc();
     }
   } else {
     // FLAG_stop_sim_at is at the non-default value. Stop in the debugger when
     // we reach the particular instruction count or address.
     while (program_counter != kEndSimulatingPC) {
       Instr* instr = reinterpret_cast<Instr*>(program_counter);
       icount_++;
-      if (static_cast<intptr_t>(icount_) == FLAG_stop_sim_at) {
+      if (icount_ == FLAG_stop_sim_at) {
         SimulatorDebugger dbg(this);
         dbg.Stop(instr, "Instruction count reached");
       } else if (reinterpret_cast<intptr_t>(instr) == FLAG_stop_sim_at) {
         SimulatorDebugger dbg(this);
         dbg.Stop(instr, "Instruction address reached");
       } else if (IsIllegalAddress(program_counter)) {
         HandleIllegalAccess(program_counter, instr);
       } else {
         InstructionDecode(instr);
       }
@@ skipping 193 matching lines @@
   set_register(kExceptionObjectReg, bit_cast<int32_t>(raw_exception));
   set_register(kStackTraceObjectReg, bit_cast<int32_t>(raw_stacktrace));
   buf->Longjmp();
 }
 
 }  // namespace dart
 
 #endif  // !defined(HOST_ARCH_ARM)
 
 #endif  // defined TARGET_ARCH_ARM