From e3b557809604d036af6e00c60f012c2025b59a5e Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Sat, 11 Feb 2023 13:38:04 +0100
Subject: Vendor import of llvm-project main
 llvmorg-16-init-18548-gb0daacf58f41, the last commit before the upstream
 release/17.x branch was created.

---
 llvm/lib/IR/Module.cpp | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

(limited to 'llvm/lib/IR/Module.cpp')

diff --git a/llvm/lib/IR/Module.cpp b/llvm/lib/IR/Module.cpp
index b51ea45f651a..49fadc9ed7e6 100644
--- a/llvm/lib/IR/Module.cpp
+++ b/llvm/lib/IR/Module.cpp
@@ -12,7 +12,6 @@
 
 #include "llvm/IR/Module.h"
 #include "SymbolTableListTraitsImpl.h"
-#include "llvm/ADT/Optional.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringMap.h"
@@ -49,6 +48,7 @@
 #include <cassert>
 #include <cstdint>
 #include <memory>
+#include <optional>
 #include <utility>
 #include <vector>
 
@@ -596,7 +596,9 @@ PICLevel::Level Module::getPICLevel() const {
 }
 
 void Module::setPICLevel(PICLevel::Level PL) {
-  addModuleFlag(ModFlagBehavior::Max, "PIC Level", PL);
+  // The merge result of a non-PIC object and a PIC object can only be reliably
+  // used as a non-PIC object, so use the Min merge behavior.
+  addModuleFlag(ModFlagBehavior::Min, "PIC Level", PL);
 }
 
 PIELevel::Level Module::getPIELevel() const {
@@ -613,11 +615,11 @@ void Module::setPIELevel(PIELevel::Level PL) {
   addModuleFlag(ModFlagBehavior::Max, "PIE Level", PL);
 }
 
-Optional<CodeModel::Model> Module::getCodeModel() const {
+std::optional<CodeModel::Model> Module::getCodeModel() const {
   auto *Val = cast_or_null<ConstantAsMetadata>(getModuleFlag("Code Model"));
 
   if (!Val)
-    return None;
+    return std::nullopt;
 
   return static_cast<CodeModel::Model>(
       cast<ConstantInt>(Val->getValue())->getZExtValue());
@@ -773,9 +775,9 @@ static VersionTuple getSDKVersionMD(Metadata *MD) {
   auto *Arr = dyn_cast_or_null<ConstantDataArray>(CM->getValue());
   if (!Arr)
     return {};
-  auto getVersionComponent = [&](unsigned Index) -> Optional<unsigned> {
+  auto getVersionComponent = [&](unsigned Index) -> std::optional<unsigned> {
     if (Index >= Arr->getNumElements())
-      return None;
+      return std::nullopt;
     return (unsigned)Arr->getElementAsInteger(Index);
   };
   auto Major = getVersionComponent(0);
-- 
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