[tools] Use std::nullopt instead of None (NFC)

This patch mechanically replaces None with std::nullopt where the
compiler would warn if None were deprecated.  The intent is to reduce
the amount of manual work required in migrating from Optional to
std::optional.

This is part of an effort to migrate from llvm::Optional to
std::optional:

https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/tools/llvm-profgen/PerfReader.cpp b/llvm/tools/llvm-profgen/PerfReader.cpp
index 0f27429..14bc04b 100644
--- a/llvm/tools/llvm-profgen/PerfReader.cpp
+++ b/llvm/tools/llvm-profgen/PerfReader.cpp
@@ -396,7 +396,7 @@ PerfInputFile PerfScriptReader::convertPerfDataToTrace(
   StringRef ScriptSampleArgs[] = {PerfPath, "script",     "--show-mmap-events",
                                   "-F",     "ip,brstack", "--pid",
                                   PIDs,     "-i",         PerfData};
-  sys::ExecuteAndWait(PerfPath, ScriptSampleArgs, llvm::None, Redirects);
+  sys::ExecuteAndWait(PerfPath, ScriptSampleArgs, std::nullopt, Redirects);
 
   return {PerfTraceFile, PerfFormat::PerfScript, PerfContent::UnknownContent};
 }