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      1 //===- llvm-xray.cpp: XRay Tool Main Program ------------------------------===//
      2 //
      3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
      4 // See https://llvm.org/LICENSE.txt for license information.
      5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
      6 //
      7 //===----------------------------------------------------------------------===//
      8 //
      9 // This file implements the main entry point for the suite of XRay tools. All
     10 // additional functionality are implemented as subcommands.
     11 //
     12 //===----------------------------------------------------------------------===//
     13 //
     14 // Basic usage:
     15 //
     16 //   llvm-xray [options] <subcommand> [subcommand-specific options]
     17 //
     18 #include "xray-registry.h"
     19 #include "llvm/Support/CommandLine.h"
     20 #include "llvm/Support/raw_ostream.h"
     21 
     22 using namespace llvm;
     23 using namespace llvm::xray;
     24 
     25 int main(int argc, char *argv[]) {
     26   cl::ParseCommandLineOptions(argc, argv,
     27                               "XRay Tools\n\n"
     28                               "  This program consolidates multiple XRay trace "
     29                               "processing tools for convenient access.\n");
     30   for (auto *SC : cl::getRegisteredSubcommands()) {
     31     if (*SC) {
     32       // If no subcommand was provided, we need to explicitly check if this is
     33       // the top-level subcommand.
     34       if (SC == &*cl::TopLevelSubCommand) {
     35         cl::PrintHelpMessage(false, true);
     36         return 0;
     37       }
     38       if (auto C = dispatch(SC)) {
     39         ExitOnError("llvm-xray: ")(C());
     40         return 0;
     41       }
     42     }
     43   }
     44 
     45   // If all else fails, we still print the usage message.
     46   cl::PrintHelpMessage(false, true);
     47   return 0;
     48 }
     49