[llvm] [Bolt] Add a new hidden option to perf2bolt for testing purpose (PR #163785)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- bolt/include/bolt/Profile/DataAggregator.h bolt/lib/Profile/DataAggregator.cpp bolt/unittests/Profile/PerfSpeEvents.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/bolt/include/bolt/Profile/DataAggregator.h b/bolt/include/bolt/Profile/DataAggregator.h
index 1f34482ce..9f19f7e95 100644
--- a/bolt/include/bolt/Profile/DataAggregator.h
+++ b/bolt/include/bolt/Profile/DataAggregator.h
@@ -178,9 +178,9 @@ private:
   /// Process info for spawned processes
   PerfProcessInfo BuildIDProcessInfo = {PerfProcessType::BUILDIDS};
   PerfProcessInfo MainEventsPPI = {PerfProcessType::MAIN_EVENTS};
-  PerfProcessInfo MemEventsPPI  = {PerfProcessType::MEN_EVENTS};
+  PerfProcessInfo MemEventsPPI = {PerfProcessType::MEN_EVENTS};
   PerfProcessInfo MMapEventsPPI = {PerfProcessType::MMAP_EVENTS};
-  PerfProcessInfo TaskEventsPPI  = {PerfProcessType::TASK_EVENTS};
+  PerfProcessInfo TaskEventsPPI = {PerfProcessType::TASK_EVENTS};
 
   /// Kernel VM starts at fixed based address
   /// https://www.kernel.org/doc/Documentation/x86/x86_64/mm.txt
@@ -471,9 +471,9 @@ private:
   ///
   /// We process the special header of the pre-parsed profile first to
   /// determine an offset/length pairs for each events.
-  /// Later based on these information we open only a slice of the pre-parsed file
-  /// which belongs to the required event.
-  /// After the preparation parsePerfData function is invoked.
+  /// Later based on these information we open only a slice of the pre-parsed
+  /// file which belongs to the required event. After the preparation
+  /// parsePerfData function is invoked.
   void parsePerfTextData(BinaryContext &BC);
 
   /// Parse the header of the perf text file.
diff --git a/bolt/lib/Profile/DataAggregator.cpp b/bolt/lib/Profile/DataAggregator.cpp
index 91b8d0e33..c27de56f1 100644
--- a/bolt/lib/Profile/DataAggregator.cpp
+++ b/bolt/lib/Profile/DataAggregator.cpp
@@ -121,11 +121,11 @@ cl::opt<bool> ReadPreAggregated(
     "pa", cl::desc("skip perf and read data from a pre-aggregated file format"),
     cl::cat(AggregatorCategory));
 
-cl::opt<bool>
-    ReadPerfTextData("perf-text-data",
-                   cl::desc("skip perf event collection by reading a "
-                            "pre-parsed perf-script output in a textual format"),
-                   cl::Hidden, cl::cat(AggregatorCategory));
+cl::opt<bool> ReadPerfTextData(
+    "perf-text-data",
+    cl::desc("skip perf event collection by reading a "
+             "pre-parsed perf-script output in a textual format"),
+    cl::Hidden, cl::cat(AggregatorCategory));
 
 cl::opt<bool> GeneratePerfTextProfile(
     "generate-perf-text-data",
@@ -447,7 +447,7 @@ std::error_code DataAggregator::parsePerfTextFileHeader() {
       return make_error_code(llvm::errc::io_error);
     }
 
-   if (LengthStr.getAsInteger(10, Length)) {
+    if (LengthStr.getAsInteger(10, Length)) {
       reportError("corrupted decimal number");
       Diag << "Found: " << LengthStr << "in" << HeaderLine << "\n";
       return make_error_code(llvm::errc::io_error);
@@ -491,7 +491,6 @@ void DataAggregator::parsePerfTextData(BinaryContext &BC) {
   parsePerfData(BC);
 }
 
-
 void DataAggregator::generatePerfTextData() {
   std::error_code EC;
   raw_fd_ostream OutFile(opts::OutputFilename, EC, sys::fs::OpenFlags::OF_None);
@@ -573,7 +572,8 @@ int DataAggregator::prepareToParse(StringRef Name, PerfProcessInfo &Process,
       ErrorOr<std::unique_ptr<MemoryBuffer>> MB =
           MemoryBuffer::getFileSlice(Filename, Process.Length, Process.Offset);
       if (std::error_code EC = MB.getError()) {
-        errs() << "Cannot open " << Process.Type << ": " << EC.message() << "\n";
+        errs() << "Cannot open " << Process.Type << ": " << EC.message()
+               << "\n";
         exit(1);
       }
 
@@ -584,14 +584,12 @@ int DataAggregator::prepareToParse(StringRef Name, PerfProcessInfo &Process,
       return 0;
     }
 
-    errs() << "PERF2BOLT: missing pre-parsed data for " << Process.Type
-           << "\n";
+    errs() << "PERF2BOLT: missing pre-parsed data for " << Process.Type << "\n";
     errs() << "PERF2BOLT: please check whether your input file was generated "
-                "with --generate-perf-text-data option. \n";
+              "with --generate-perf-text-data option. \n";
     exit(1);
   }
 
-
   std::string Error;
   outs() << "PERF2BOLT: waiting for perf " << Name
          << " collection to finish...\n";

``````````

</details>


https://github.com/llvm/llvm-project/pull/163785