[Target] 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, 3 insertions, 3 deletions

diff --git a/llvm/lib/Target/WebAssembly/Disassembler/WebAssemblyDisassembler.cpp b/llvm/lib/Target/WebAssembly/Disassembler/WebAssemblyDisassembler.cpp
index ae65a9d..87dfeba 100644
--- a/llvm/lib/Target/WebAssembly/Disassembler/WebAssemblyDisassembler.cpp
+++ b/llvm/lib/Target/WebAssembly/Disassembler/WebAssemblyDisassembler.cpp
@@ -129,21 +129,21 @@ Optional<MCDisassembler::DecodeStatus> WebAssemblyDisassembler::onSymbolStart(
     // Start of a code section: we're parsing only the function count.
     int64_t FunctionCount;
     if (!nextLEB(FunctionCount, Bytes, Size, false))
-      return None;
+      return std::nullopt;
     outs() << "        # " << FunctionCount << " functions in section.";
   } else {
     // Parse the start of a single function.
     int64_t BodySize, LocalEntryCount;
     if (!nextLEB(BodySize, Bytes, Size, false) ||
         !nextLEB(LocalEntryCount, Bytes, Size, false))
-      return None;
+      return std::nullopt;
     if (LocalEntryCount) {
       outs() << "        .local ";
       for (int64_t I = 0; I < LocalEntryCount; I++) {
         int64_t Count, Type;
         if (!nextLEB(Count, Bytes, Size, false) ||
             !nextLEB(Type, Bytes, Size, false))
-          return None;
+          return std::nullopt;
         for (int64_t J = 0; J < Count; J++) {
           if (I || J)
             outs() << ", ";