From e6da045ce17e2b259030f801642e1d0e370125ad Mon Sep 17 00:00:00 2001
From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Thu, 16 Apr 2015 12:43:33 +0000
Subject: [PATCH] [Mips] Use unique_ptr to manage ownership.

Required some tweaking of ValueMap to accommodate a move-only value
type. No functional change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235091 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/IR/ValueMap.h              | 15 ++++++++++-----
 lib/Target/Mips/MipsMachineFunction.cpp | 22 +++++++---------------
 lib/Target/Mips/MipsMachineFunction.h   |  5 +++--
 3 files changed, 20 insertions(+), 22 deletions(-)

diff --git a/include/llvm/IR/ValueMap.h b/include/llvm/IR/ValueMap.h
index df3d55a839d..4d00b637609 100644
--- a/include/llvm/IR/ValueMap.h
+++ b/include/llvm/IR/ValueMap.h
@@ -147,9 +147,14 @@ public:
   // If the key is already in the map, it returns false and doesn't update the
   // value.
   std::pair<iterator, bool> insert(const std::pair<KeyT, ValueT> &KV) {
-    std::pair<typename MapT::iterator, bool> map_result=
-      Map.insert(std::make_pair(Wrap(KV.first), KV.second));
-    return std::make_pair(iterator(map_result.first), map_result.second);
+    auto MapResult = Map.insert(std::make_pair(Wrap(KV.first), KV.second));
+    return std::make_pair(iterator(MapResult.first), MapResult.second);
+  }
+
+  std::pair<iterator, bool> insert(std::pair<KeyT, ValueT> &&KV) {
+    auto MapResult =
+        Map.insert(std::make_pair(Wrap(KV.first), std::move(KV.second)));
+    return std::make_pair(iterator(MapResult.first), MapResult.second);
   }
 
   /// insert - Range insertion of pairs.
@@ -256,9 +261,9 @@ public:
       // I could == Copy.Map->Map.end() if the onRAUW callback already
       // removed the old mapping.
       if (I != Copy.Map->Map.end()) {
-        ValueT Target(I->second);
+        ValueT Target(std::move(I->second));
         Copy.Map->Map.erase(I);  // Definitely destroys *this.
-        Copy.Map->insert(std::make_pair(typed_new_key, Target));
+        Copy.Map->insert(std::make_pair(typed_new_key, std::move(Target)));
       }
     }
   }
diff --git a/lib/Target/Mips/MipsMachineFunction.cpp b/lib/Target/Mips/MipsMachineFunction.cpp
index 09e722d331f..0d1ee046f0d 100644
--- a/lib/Target/Mips/MipsMachineFunction.cpp
+++ b/lib/Target/Mips/MipsMachineFunction.cpp
@@ -60,15 +60,7 @@ void MipsCallEntry::printCustom(raw_ostream &O) const {
 #endif
 }
 
-MipsFunctionInfo::~MipsFunctionInfo() {
-  for (StringMap<const MipsCallEntry *>::iterator
-       I = ExternalCallEntries.begin(), E = ExternalCallEntries.end(); I != E;
-       ++I)
-    delete I->getValue();
-
-  for (const auto &Entry : GlobalCallEntries)
-    delete Entry.second;
-}
+MipsFunctionInfo::~MipsFunctionInfo() {}
 
 bool MipsFunctionInfo::globalBaseRegSet() const {
   return GlobalBaseReg;
@@ -125,21 +117,21 @@ bool MipsFunctionInfo::isEhDataRegFI(int FI) const {
 }
 
 MachinePointerInfo MipsFunctionInfo::callPtrInfo(StringRef Name) {
-  const MipsCallEntry *&E = ExternalCallEntries[Name];
+  std::unique_ptr<const MipsCallEntry> &E = ExternalCallEntries[Name];
 
   if (!E)
-    E = new MipsCallEntry(Name);
+    E = llvm::make_unique<MipsCallEntry>(Name);
 
-  return MachinePointerInfo(E);
+  return MachinePointerInfo(E.get());
 }
 
 MachinePointerInfo MipsFunctionInfo::callPtrInfo(const GlobalValue *Val) {
-  const MipsCallEntry *&E = GlobalCallEntries[Val];
+  std::unique_ptr<const MipsCallEntry> &E = GlobalCallEntries[Val];
 
   if (!E)
-    E = new MipsCallEntry(Val);
+    E = llvm::make_unique<MipsCallEntry>(Val);
 
-  return MachinePointerInfo(E);
+  return MachinePointerInfo(E.get());
 }
 
 int MipsFunctionInfo::getMoveF64ViaSpillFI(const TargetRegisterClass *RC) {
diff --git a/lib/Target/Mips/MipsMachineFunction.h b/lib/Target/Mips/MipsMachineFunction.h
index 217f30734b2..32436efa2ed 100644
--- a/lib/Target/Mips/MipsMachineFunction.h
+++ b/lib/Target/Mips/MipsMachineFunction.h
@@ -144,8 +144,9 @@ private:
   int MoveF64ViaSpillFI;
 
   /// MipsCallEntry maps.
-  StringMap<const MipsCallEntry *> ExternalCallEntries;
-  ValueMap<const GlobalValue *, const MipsCallEntry *> GlobalCallEntries;
+  StringMap<std::unique_ptr<const MipsCallEntry>> ExternalCallEntries;
+  ValueMap<const GlobalValue *, std::unique_ptr<const MipsCallEntry>>
+      GlobalCallEntries;
 };
 
 } // end of namespace llvm