[llvm] r226559 - [PM] Make the LoopInfoBase and LoopInfo objects movable so that they can

[Chandler Carruth]

Author: chandlerc
Date: Tue Jan 20 04:58:38 2015
New Revision: 226559

URL: http://llvm.org/viewvc/llvm-project?rev=226559&view=rev
Log:
[PM] Make the LoopInfoBase and LoopInfo objects movable so that they can
be used as results in the new pass manager.

Modified:
    llvm/trunk/include/llvm/Analysis/LoopInfo.h

Modified: llvm/trunk/include/llvm/Analysis/LoopInfo.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Analysis/LoopInfo.h?rev=226559&r1=226558&r2=226559&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Analysis/LoopInfo.h (original)
+++ llvm/trunk/include/llvm/Analysis/LoopInfo.h Tue Jan 20 04:58:38 2015
@@ -502,6 +502,24 @@ public:
   LoopInfoBase() { }
   ~LoopInfoBase() { releaseMemory(); }
 
+  LoopInfoBase(LoopInfoBase &&Arg)
+      : BBMap(std::move(Arg.BBMap)),
+        TopLevelLoops(std::move(Arg.TopLevelLoops)) {
+    // We have to clear the arguments top level loops as we've taken ownership.
+    Arg.TopLevelLoops.clear();
+  }
+  LoopInfoBase &operator=(LoopInfoBase &&RHS) {
+    if (&RHS != this) {
+      BBMap = std::move(RHS.BBMap);
+
+      for (auto *L : TopLevelLoops)
+        delete L;
+      TopLevelLoops = std::move(RHS.TopLevelLoops);
+      RHS.TopLevelLoops.clear();
+    }
+    return *this;
+  }
+
   void releaseMemory() {
     BBMap.clear();
 
@@ -635,6 +653,12 @@ class LoopInfo : public LoopInfoBase<Bas
 public:
   LoopInfo() {}
 
+  LoopInfo(LoopInfo &&Arg) : BaseT(std::move(static_cast<BaseT &>(Arg))) {}
+  LoopInfo &operator=(LoopInfo &&RHS) {
+    BaseT::operator=(std::move(static_cast<BaseT &>(RHS)));
+    return *this;
+  }
+
   // Most of the public interface is provided via LoopInfoBase.
 
   /// updateUnloop - Update LoopInfo after removing the last backedge from a