[llvm-profdata] Accept --version argument

[michaelplatings]

Summary

The llvm-profdata --version output now looks like:

llvm-profdata
LLVM (http://llvm.org/):
  LLVM version 17.0.0git
  Optimized build with assertions.

This makes llvm-profdata more consistent with other tools.

[TWeaver]

Hello and good afternoon from the UK,

The test added via this change has caused the following buildbot to start failing:

https://lab.llvm.org/buildbot/#/builders/216/builds/21595

are you able to take a look?

many thanks,
Tom

[michaelplatings]

Hi Tom, yes https://reviews.llvm.org/rG1023d7e40dfc hopefully fixes this. Thanks.

[TWeaver]

@michaelplatings Ah, my apologies, hadn't seen that. Many thanks for the speedy fix! 👍

llvm/test/tools/llvm-profdata/version.test

+# RUN: llvm-profdata --version | FileCheck %s
+
+# CHECK: llvm-profdata{{$}}
+# CHECK: LLVM version {{.*}}

llvm/tools/llvm-profdata/llvm-profdata.cpp

if (strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "-help") == 0 ||
 
       errs() << "OVERVIEW: LLVM profile data tools\n\n"
              << "USAGE: " << ProgName << " <command> [args...]\n"
              << "USAGE: " << ProgName << " <command> -help\n\n"
              << "See each individual command --help for more details.\n"
              << "Available commands: merge, show, overlap\n";
       return 0;
     }
+
+    if (strcmp(argv[1], "--version") == 0) {
+      outs() << ProgName << '\n';
+      cl::PrintVersionMessage();
+      return 0;
+    }
   }
 
   if (argc < 2)
     errs() << ProgName << ": No command specified!\n";
   else
     errs() << ProgName << ": Unknown command!\n";
 
   errs() << "USAGE: " << ProgName << " <merge|show|overlap> [args...]\n";
   return 1;
 }