[llvm] Add initial support for SPE brstack format (PR #129231)

[Amir Ayupov via llvm-commits]

================
@@ -1527,9 +1551,11 @@ void DataAggregator::printBranchStacksDiagnostics(
 }
 
 std::error_code DataAggregator::parseBranchEvents() {
-  outs() << "PERF2BOLT: parse branch events...\n";
-  NamedRegionTimer T("parseBranch", "Parsing branch events", TimerGroupName,
-                     TimerGroupDesc, opts::TimeAggregator);
+  std::string BranchEventTypeStr =
+      opts::ArmSPE ? "SPE branch events in LBR-format" : "branch events";
+  outs() << "PERF2BOLT: parse " << BranchEventTypeStr << "...\n";
+  NamedRegionTimer T("parseBranch", "Parsing " + BranchEventTypeStr,
----------------
aaupov wrote:

Let's keep the name of the timer as is. 

https://github.com/llvm/llvm-project/pull/129231