From e9e64f7c9e8af778faa62d1b412f190bb3e85f3c Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu@google.com>
Date: Fri, 2 Dec 2022 20:36:04 -0800
Subject: [Bitcode] 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
---
 llvm/lib/Bitcode/Writer/BitcodeWriter.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'llvm/lib/Bitcode/Writer/BitcodeWriter.cpp')

diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
index bed9d6d..ff64435 100644
--- a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -528,7 +528,7 @@ private:
   Optional<unsigned> getValueId(GlobalValue::GUID ValGUID) {
     auto VMI = GUIDToValueIdMap.find(ValGUID);
     if (VMI == GUIDToValueIdMap.end())
-      return None;
+      return std::nullopt;
     return VMI->second;
   }
 
@@ -4431,7 +4431,7 @@ void IndexBitcodeWriter::writeCombinedGlobalValueSummary() {
 
     auto GetValueId = [&](const ValueInfo &VI) -> Optional<unsigned> {
       if (!VI)
-        return None;
+        return std::nullopt;
       return getValueId(VI.getGUID());
     };
 
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