[llvm-branch-commits] [llvm] [llvm-profgen] Extend llvm-profgen to generate vtable profiles with data access events. (PR #148013)

[Mingming Liu via llvm-branch-commits]

================
@@ -370,6 +377,61 @@ PerfReaderBase::create(ProfiledBinary *Binary, 
PerfInputFile &PerfInput,
   return PerfReader;
 }
 
+void PerfReaderBase::parseDataAccessPerfTraces(
+    StringRef DataAccessPerfTraceFile, std::optional<int32_t> PIDFilter) {
+  std::regex logRegex(
+      
R"(^.*?PERF_RECORD_SAMPLE\(.*?\):\s*(\d+)\/(\d+):\s*(0x[0-9a-fA-F]+)\s+period:\s*\d+\s+addr:\s*(0x[0-9a-fA-F]+)$)");
+
+  auto BufferOrErr = MemoryBuffer::getFile(DataAccessPerfTraceFile);
+  std::error_code EC = BufferOrErr.getError();
+  if (EC)
----------------
mingmingl-llvm wrote:

done by returning error_code in this function.

https://github.com/llvm/llvm-project/pull/148013
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