[NFC] Replace `compare` with (in)equality operator where applicable.

Using compare is verbose, bug prone and potentially inefficient (because
of early termination). Replace relevant call sites with the (in)equality
operator.

llvm-svn: 349972

lldb/source/Core/IOHandler.cpp

@@ -1052,7 +1052,7 @@ public:
     Windows::iterator pos, end = m_subwindows.end();
     size_t i = 0;
     for (pos = m_subwindows.begin(); pos != end; ++pos, ++i) {
-      if ((*pos)->m_name.compare(name) == 0)
+      if ((*pos)->m_name == name)
         return *pos;
     }
     return WindowSP();

lldb/source/Core/Module.cpp

@@ -783,7 +783,7 @@ void Module::LookupInfo::Prune(SymbolContextList &sc_list,
               qualified_name = cpp_method.GetBasename().str();
             else
               qualified_name = cpp_method.GetScopeQualifiedName();
-            if (qualified_name.compare(m_name.GetCString()) != 0) {
+            if (qualified_name != m_name.GetCString()) {
               sc_list.RemoveContextAtIndex(i);
               continue;
             }

lldb/source/Host/common/XML.cpp

@@ -438,7 +438,7 @@ XMLNode ApplePropertyList::GetValueNode(const char *key) const {
         "key", [key, &value_node](const XMLNode &key_node) -> bool {
           std::string key_name;
           if (key_node.GetElementText(key_name)) {
-            if (key_name.compare(key) == 0) {
+            if (key_name == key) {
               value_node = key_node.GetSibling();
               while (value_node && !value_node.IsElement())
                 value_node = value_node.GetSibling();

lldb/source/Interpreter/CommandAlias.cpp

@@ -158,8 +158,7 @@ void CommandAlias::GetAliasExpansion(StreamString &help_string) const {
       help_string.Printf(" %s", value.c_str());
     } else {
       help_string.Printf(" %s", opt.c_str());
-      if ((value.compare("<no-argument>") != 0) &&
-          (value.compare("<need-argument") != 0)) {
+      if ((value != "<no-argument>") && (value != "<need-argument")) {
         help_string.Printf(" %s", value.c_str());
       }
     }

lldb/source/Interpreter/CommandInterpreter.cpp

@@ -1393,7 +1393,7 @@ CommandObject *CommandInterpreter::BuildAliasResult(
   alias_cmd_obj = desugared.first.get();
   std::string alias_name_str = alias_name;
   if ((cmd_args.GetArgumentCount() == 0) ||
-      (alias_name_str.compare(cmd_args.GetArgumentAtIndex(0)) != 0))
+      (alias_name_str != cmd_args.GetArgumentAtIndex(0)))
     cmd_args.Unshift(alias_name_str);
 
   result_str.Printf("%s", alias_cmd_obj->GetCommandName().str().c_str());
@@ -1937,7 +1937,7 @@ void CommandInterpreter::BuildAliasCommandArgs(CommandObject *alias_cmd_obj,
 
   // Make sure that the alias name is the 0th element in cmd_args
   std::string alias_name_str = alias_name;
-  if (alias_name_str.compare(cmd_args.GetArgumentAtIndex(0)) != 0)
+  if (alias_name_str != cmd_args.GetArgumentAtIndex(0))
     cmd_args.Unshift(alias_name_str);
 
   Args new_args(alias_cmd_obj->GetCommandName());

lldb/source/Plugins/Platform/MacOSX/PlatformDarwinKernel.cpp

@@ -710,8 +710,7 @@ Status PlatformDarwinKernel::GetSharedModule(
     }
   }
 
-  if (kext_bundle_id.compare("mach_kernel") == 0 &&
-      module_spec.GetUUID().IsValid()) {
+  if (kext_bundle_id == "mach_kernel" && module_spec.GetUUID().IsValid()) {
     // First try all kernel binaries that have a dSYM next to them
     for (auto possible_kernel : m_kernel_binaries_with_dsyms) {
       if (FileSystem::Instance().Exists(possible_kernel)) {

lldb/source/Plugins/Platform/MacOSX/PlatformMacOSX.cpp

@@ -256,7 +256,7 @@ PlatformMacOSX::GetFileWithUUID(const lldb_private::FileSpec &platform_file,
 #endif
     std::string remote_os_build;
     m_remote_platform_sp->GetOSBuildString(remote_os_build);
-    if (local_os_build.compare(remote_os_build) == 0) {
+    if (local_os_build == remote_os_build) {
       // same OS version: the local file is good enough
       local_file = platform_file;
       return Status();

lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp

@@ -1882,7 +1882,7 @@ ThreadSP ProcessGDBRemote::SetThreadStopInfo(
           bool handled = false;
           bool did_exec = false;
           if (!reason.empty()) {
-            if (reason.compare("trace") == 0) {
+            if (reason == "trace") {
               addr_t pc = thread_sp->GetRegisterContext()->GetPC();
               lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()
                                                       ->GetBreakpointSiteList()
@@ -1900,7 +1900,7 @@ ThreadSP ProcessGDBRemote::SetThreadStopInfo(
                 thread_sp->SetStopInfo(
                     StopInfo::CreateStopReasonToTrace(*thread_sp));
               handled = true;
-            } else if (reason.compare("breakpoint") == 0) {
+            } else if (reason == "breakpoint") {
               addr_t pc = thread_sp->GetRegisterContext()->GetPC();
               lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()
                                                       ->GetBreakpointSiteList()
@@ -1921,9 +1921,9 @@ ThreadSP ProcessGDBRemote::SetThreadStopInfo(
                   thread_sp->SetStopInfo(invalid_stop_info_sp);
                 }
               }
-            } else if (reason.compare("trap") == 0) {
+            } else if (reason == "trap") {
               // Let the trap just use the standard signal stop reason below...
-            } else if (reason.compare("watchpoint") == 0) {
+            } else if (reason == "watchpoint") {
               StringExtractor desc_extractor(description.c_str());
               addr_t wp_addr = desc_extractor.GetU64(LLDB_INVALID_ADDRESS);
               uint32_t wp_index = desc_extractor.GetU32(LLDB_INVALID_INDEX32);
@@ -1955,11 +1955,11 @@ ThreadSP ProcessGDBRemote::SetThreadStopInfo(
               thread_sp->SetStopInfo(StopInfo::CreateStopReasonWithWatchpointID(
                   *thread_sp, watch_id, wp_hit_addr));
               handled = true;
-            } else if (reason.compare("exception") == 0) {
+            } else if (reason == "exception") {
               thread_sp->SetStopInfo(StopInfo::CreateStopReasonWithException(
                   *thread_sp, description.c_str()));
               handled = true;
-            } else if (reason.compare("exec") == 0) {
+            } else if (reason == "exec") {
               did_exec = true;
               thread_sp->SetStopInfo(
                   StopInfo::CreateStopReasonWithExec(*thread_sp));

lldb/source/Symbol/ClangASTContext.cpp

@@ -7452,7 +7452,7 @@ ClangASTContext::GetIndexOfChildWithName(lldb::opaque_compiler_type_t type,
                                                base_class->getType());
             std::string base_class_type_name(
                 base_class_clang_type.GetTypeName().AsCString(""));
-            if (base_class_type_name.compare(name) == 0)
+            if (base_class_type_name == name)
               return child_idx;
             ++child_idx;
           }

lldb/source/Symbol/TypeList.cpp

@@ -180,8 +180,7 @@ void TypeList::RemoveMismatchedTypes(const std::string &type_scope,
       } else {
         // The type we are currently looking at doesn't exists in a namespace
         // or class, so it only matches if there is no type scope...
-        keep_match =
-            type_scope.empty() && type_basename.compare(match_type_name) == 0;
+        keep_match = type_scope.empty() && type_basename == match_type_name;
       }
     }
 

lldb/source/Symbol/TypeMap.cpp

@@ -223,8 +223,7 @@ void TypeMap::RemoveMismatchedTypes(const std::string &type_scope,
       } else {
         // The type we are currently looking at doesn't exists in a namespace
         // or class, so it only matches if there is no type scope...
-        keep_match =
-            type_scope.empty() && type_basename.compare(match_type_name) == 0;
+        keep_match = type_scope.empty() && type_basename == match_type_name;
       }
     }
 

lldb/tools/debugserver/source/RNBRemote.cpp

@@ -1825,18 +1825,18 @@ rnb_err_t RNBRemote::HandlePacket_qRcmd(const char *p) {
   }
   if (*c == '\0') {
     std::string command = get_identifier(line);
-    if (command.compare("set") == 0) {
+    if (command == "set") {
       std::string variable = get_identifier(line);
       std::string op = get_operator(line);
       std::string value = get_value(line);
-      if (variable.compare("logfile") == 0) {
+      if (variable == "logfile") {
         FILE *log_file = fopen(value.c_str(), "w");
         if (log_file) {
           DNBLogSetLogCallback(FileLogCallback, log_file);
           return SendPacket("OK");
         }
         return SendPacket("E71");
-      } else if (variable.compare("logmask") == 0) {
+      } else if (variable == "logmask") {
         char *end;
         errno = 0;
         uint32_t logmask =
@@ -4231,7 +4231,7 @@ rnb_err_t RNBRemote::HandlePacket_GetProfileData(const char *p) {
   std::string name;
   std::string value;
   while (packet.GetNameColonValue(name, value)) {
-    if (name.compare("scan_type") == 0) {
+    if (name == "scan_type") {
       std::istringstream iss(value);
       uint32_t int_value = 0;
       if (iss >> std::hex >> int_value) {
@@ -4261,11 +4261,11 @@ rnb_err_t RNBRemote::HandlePacket_SetEnableAsyncProfiling(const char *p) {
   std::string name;
   std::string value;
   while (packet.GetNameColonValue(name, value)) {
-    if (name.compare("enable") == 0) {
+    if (name == "enable") {
       enable = strtoul(value.c_str(), NULL, 10) > 0;
-    } else if (name.compare("interval_usec") == 0) {
+    } else if (name == "interval_usec") {
       interval_usec = strtoul(value.c_str(), NULL, 10);
-    } else if (name.compare("scan_type") == 0) {
+    } else if (name == "scan_type") {
       std::istringstream iss(value);
       uint32_t int_value = 0;
       if (iss >> std::hex >> int_value) {

lldb/tools/lldb-mi/MICmdArgValConsume.cpp

@@ -67,7 +67,7 @@ bool CMICmdArgValConsume::Validate(CMICmdArgContext &vwArgContext) {
   while (it != vecOptions.end()) {
     const CMIUtilString &rTxt(*it);
 
-    if (rTxt.compare("--") == 0) {
+    if (rTxt == "--") {
       m_bFound = true;
       m_bValid = true;
       if (!vwArgContext.RemoveArg(rTxt))

lldb/tools/lldb-mi/MIDriver.cpp

@@ -443,8 +443,7 @@ lldb::SBError CMIDriver::ParseArgs(const int argc, const char *argv[],
           CMICmdArgValString(true, false, true).IsStringArg(strArg)) {
         // Is this the command file for the '-s' or '--source' options?
         const CMIUtilString strPrevArg(argv[i - 1]);
-        if (strPrevArg.compare("-s") == 0 ||
-            strPrevArg.compare("--source") == 0) {
+        if (strPrevArg == "-s" || strPrevArg == "--source") {
           m_strCmdLineArgCommandFileNamePath = strArg;
           m_bHaveCommandFileNamePathOnCmdLine = true;
           i--; // skip '-s' on the next loop
@@ -457,7 +456,7 @@ lldb::SBError CMIDriver::ParseArgs(const int argc, const char *argv[],
       }
       // Report error if no command file was specified for the '-s' or
       // '--source' options
-      else if (strArg.compare("-s") == 0 || strArg.compare("--source") == 0) {
+      else if (strArg == "-s" || strArg == "--source") {
         vwbExiting = true;
         const CMIUtilString errMsg = CMIUtilString::Format(
             MIRSRC(IDS_CMD_ARGS_ERR_VALIDATION_MISSING_INF), strArg.c_str());
@@ -465,13 +464,13 @@ lldb::SBError CMIDriver::ParseArgs(const int argc, const char *argv[],
         break;
       }
       // This argument is also checked for in CMIDriverMgr::ParseArgs()
-      else if (strArg.compare("--executable") == 0) // Used to specify that
-                                                    // there is executable
-                                                    // argument also on the
-                                                    // command line
-      {                                             // See fn description.
+      else if (strArg == "--executable") // Used to specify that
+                                         // there is executable
+                                         // argument also on the
+                                         // command line
+      {                                  // See fn description.
         bHaveExecutableLongOption = true;
-      } else if (strArg.compare("--synchronous") == 0) {
+      } else if (strArg == "--synchronous") {
         CMICmnLLDBDebugSessionInfo::Instance().GetDebugger().SetAsync(false);
       }
     }

lldb/tools/lldb-mi/MIDriverMgr.cpp

@@ -516,29 +516,27 @@ bool CMIDriverMgr::ParseArgs(const int argc, const char *argv[],
       const CMIUtilString strArg(argv[i]);
 
       // Argument "--executable" is also check for in CMIDriver::ParseArgs()
-      if ((0 ==
-           strArg.compare(
-               "--interpreter")) || // Given by the client such as Eclipse
-          (0 == strArg.compare("--executable"))) // Used to specify that there
-                                                 // is executable argument also
-                                                 // on the command line
-      {                                          // See fn description.
+      if (("--interpreter" == strArg) || // Given by the client such as Eclipse
+          ("--executable" == strArg))    // Used to specify that there
+                                         // is executable argument also
+                                         // on the command line
+      {                                  // See fn description.
         bHaveArgInterpret = true;
       }
-      if (0 == strArg.compare("--version")) {
+      if ("--version" == strArg) {
         bHaveArgVersion = true;
       }
-      if (0 == strArg.compare("--versionLong")) {
+      if ("--versionLong" == strArg) {
         bHaveArgVersionLong = true;
       }
-      if (0 == strArg.compare("--log")) {
+      if ("--log" == strArg) {
         bHaveArgLog = true;
       }
       if (0 == strArg.compare(0, 10, "--log-dir=")) {
         strLogDir = strArg.substr(10, CMIUtilString::npos);
         bHaveArgLogDir = true;
       }
-      if ((0 == strArg.compare("--help")) || (0 == strArg.compare("-h"))) {
+      if (("--help" == strArg) || ("-h" == strArg)) {
         bHaveArgHelp = true;
       }
     }