Replace intptr_t with TokenDescriptor

runtime/vm/simulator_mips.cc

Index: runtime/vm/simulator_mips.cc
diff --git a/runtime/vm/simulator_mips.cc b/runtime/vm/simulator_mips.cc
index f8007edac85e76716fbc1527e34c168b907030ba..d7cdc1555adf663508e596ff3c378df3535d0c27 100644
--- a/runtime/vm/simulator_mips.cc
+++ b/runtime/vm/simulator_mips.cc
@@ -94,11 +94,11 @@ class SimulatorDebugger {
   bool GetFValue(char* desc, double* value);
   bool GetDValue(char* desc, double* value);
 
-  static intptr_t GetApproximateTokenIndex(const Code& code, uword pc);
+  static TokenDescriptor GetApproximateTokenIndex(const Code& code, uword pc);
 
   static void PrintDartFrame(uword pc, uword fp, uword sp,
                              const Function& function,
-                             intptr_t token_pos,
+                             TokenDescriptor token_pos,
                              bool is_optimized,
                              bool is_inlined);
   void PrintBacktrace();
@@ -256,9 +256,9 @@ bool SimulatorDebugger::GetDValue(char* desc, double* value) {
 }
 
 
-intptr_t SimulatorDebugger::GetApproximateTokenIndex(const Code& code,
+TokenDescriptor SimulatorDebugger::GetApproximateTokenIndex(const Code& code,
                                                      uword pc) {
-  intptr_t token_pos = -1;
+  TokenDescriptor token_pos = TokenDescriptor::kNoSource;
   uword pc_offset = pc - code.EntryPoint();
   const PcDescriptors& descriptors =
       PcDescriptors::Handle(code.pc_descriptors());
@@ -266,7 +266,7 @@ intptr_t SimulatorDebugger::GetApproximateTokenIndex(const Code& code,
   while (iter.MoveNext()) {
     if (iter.PcOffset() == pc_offset) {
       return iter.TokenPos();
-    } else if ((token_pos <= 0) && (iter.PcOffset() > pc_offset)) {
+    } else if (!token_pos.IsReal() && (iter.PcOffset() > pc_offset)) {
       token_pos = iter.TokenPos();
     }
   }
@@ -276,7 +276,7 @@ intptr_t SimulatorDebugger::GetApproximateTokenIndex(const Code& code,
 
 void SimulatorDebugger::PrintDartFrame(uword pc, uword fp, uword sp,
                                        const Function& function,
-                                       intptr_t token_pos,
+                                       TokenDescriptor token_pos,
                                        bool is_optimized,
                                        bool is_inlined) {
   const Script& script = Script::Handle(function.script());
@@ -284,7 +284,7 @@ void SimulatorDebugger::PrintDartFrame(uword pc, uword fp, uword sp,
   const String& url = String::Handle(script.url());
   intptr_t line = -1;
   intptr_t column = -1;
-  if (token_pos >= 0) {
+  if (token_pos.IsReal()) {
     script.GetTokenLocation(token_pos, &line, &column);
   }
   OS::Print("pc=0x%" Px " fp=0x%" Px " sp=0x%" Px " %s%s (%s:%" Pd