vendor/llvm/llvm-trunk-r300890

6 files changed, 55 insertions, 78 deletions

diff --git a/include/llvm/Analysis/BlockFrequencyInfoImpl.h b/include/llvm/Analysis/BlockFrequencyInfoImpl.h
index e3d81fea49ea..3e05e09900a5 100644
--- a/include/llvm/Analysis/BlockFrequencyInfoImpl.h
+++ b/include/llvm/Analysis/BlockFrequencyInfoImpl.h
@@ -1164,9 +1164,8 @@ template <class BT> struct BlockEdgesAdder {
   void operator()(IrreducibleGraph &G, IrreducibleGraph::IrrNode &Irr,
                   const LoopData *OuterLoop) {
     const BlockT *BB = BFI.RPOT[Irr.Node.Index];
-    for (auto I = Successor::child_begin(BB), E = Successor::child_end(BB);
-         I != E; ++I)
-      G.addEdge(Irr, BFI.getNode(*I), OuterLoop);
+    for (const auto Succ : children<const BlockT *>(BB))
+      G.addEdge(Irr, BFI.getNode(Succ), OuterLoop);
   }
 };
 }
@@ -1210,10 +1209,9 @@ BlockFrequencyInfoImpl<BT>::propagateMassToSuccessors(LoopData *OuterLoop,
       return false;
   } else {
     const BlockT *BB = getBlock(Node);
-    for (auto SI = Successor::child_begin(BB), SE = Successor::child_end(BB);
-         SI != SE; ++SI)
-      if (!addToDist(Dist, OuterLoop, Node, getNode(*SI),
-                     getWeightFromBranchProb(BPI->getEdgeProbability(BB, SI))))
+    for (const auto Succ : children<const BlockT *>(BB))
+      if (!addToDist(Dist, OuterLoop, Node, getNode(Succ),
+                     getWeightFromBranchProb(BPI->getEdgeProbability(BB, Succ))))
         // Irreducible backedge.
         return false;
   }
diff --git a/include/llvm/Analysis/DominanceFrontierImpl.h b/include/llvm/Analysis/DominanceFrontierImpl.h
index 629ae3809045..9f8cacc24f2c 100644
--- a/include/llvm/Analysis/DominanceFrontierImpl.h
+++ b/include/llvm/Analysis/DominanceFrontierImpl.h
@@ -174,12 +174,10 @@ ForwardDominanceFrontierBase<BlockT>::calculate(const DomTreeT &DT,
     // Visit each block only once.
     if (visited.insert(currentBB).second) {
       // Loop over CFG successors to calculate DFlocal[currentNode]
-      for (auto SI = BlockTraits::child_begin(currentBB),
-                SE = BlockTraits::child_end(currentBB);
-           SI != SE; ++SI) {
+      for (const auto Succ : children<BlockT *>(currentBB)) {
         // Does Node immediately dominate this successor?
-        if (DT[*SI]->getIDom() != currentNode)
-          S.insert(*SI);
+        if (DT[Succ]->getIDom() != currentNode)
+          S.insert(Succ);
       }
     }
 
diff --git a/include/llvm/Analysis/LoopInfo.h b/include/llvm/Analysis/LoopInfo.h
index 996794b660a9..2fad1737d1c0 100644
--- a/include/llvm/Analysis/LoopInfo.h
+++ b/include/llvm/Analysis/LoopInfo.h
@@ -158,11 +158,8 @@ public:
   /// True if terminator in the block can branch to another block that is
   /// outside of the current loop.
   bool isLoopExiting(const BlockT *BB) const {
-    typedef GraphTraits<const BlockT*> BlockTraits;
-    for (typename BlockTraits::ChildIteratorType SI =
-         BlockTraits::child_begin(BB),
-         SE = BlockTraits::child_end(BB); SI != SE; ++SI) {
-      if (!contains(*SI))
+    for (const auto Succ : children<const BlockT*>(BB)) {
+      if (!contains(Succ))
         return true;
     }
     return false;
@@ -186,11 +183,8 @@ public:
     unsigned NumBackEdges = 0;
     BlockT *H = getHeader();
 
-    typedef GraphTraits<Inverse<BlockT*> > InvBlockTraits;
-    for (typename InvBlockTraits::ChildIteratorType I =
-         InvBlockTraits::child_begin(H),
-         E = InvBlockTraits::child_end(H); I != E; ++I)
-      if (contains(*I))
+    for (const auto Pred : children<Inverse<BlockT*> >(H))
+      if (contains(Pred))
         ++NumBackEdges;
 
     return NumBackEdges;
@@ -249,12 +243,9 @@ public:
   /// contains a branch back to the header.
   void getLoopLatches(SmallVectorImpl<BlockT *> &LoopLatches) const {
     BlockT *H = getHeader();
-    typedef GraphTraits<Inverse<BlockT*> > InvBlockTraits;
-    for (typename InvBlockTraits::ChildIteratorType I =
-         InvBlockTraits::child_begin(H),
-         E = InvBlockTraits::child_end(H); I != E; ++I)
-      if (contains(*I))
-        LoopLatches.push_back(*I);
+    for (const auto Pred : children<Inverse<BlockT*>>(H))
+      if (contains(Pred))
+        LoopLatches.push_back(Pred);
   }
 
   //===--------------------------------------------------------------------===//
diff --git a/include/llvm/Analysis/LoopInfoImpl.h b/include/llvm/Analysis/LoopInfoImpl.h
index 761f8721b54f..6dc0422ce0e9 100644
--- a/include/llvm/Analysis/LoopInfoImpl.h
+++ b/include/llvm/Analysis/LoopInfoImpl.h
@@ -34,14 +34,11 @@ namespace llvm {
 template<class BlockT, class LoopT>
 void LoopBase<BlockT, LoopT>::
 getExitingBlocks(SmallVectorImpl<BlockT *> &ExitingBlocks) const {
-  typedef GraphTraits<BlockT*> BlockTraits;
-  for (block_iterator BI = block_begin(), BE = block_end(); BI != BE; ++BI)
-    for (typename BlockTraits::ChildIteratorType I =
-           BlockTraits::child_begin(*BI), E = BlockTraits::child_end(*BI);
-         I != E; ++I)
-      if (!contains(*I)) {
+  for (const auto BB : blocks())
+    for (const auto Succ : children<BlockT*>(BB))
+      if (!contains(Succ)) {
         // Not in current loop? It must be an exit block.
-        ExitingBlocks.push_back(*BI);
+        ExitingBlocks.push_back(BB);
         break;
       }
 }
@@ -63,14 +60,11 @@ BlockT *LoopBase<BlockT, LoopT>::getExitingBlock() const {
 template<class BlockT, class LoopT>
 void LoopBase<BlockT, LoopT>::
 getExitBlocks(SmallVectorImpl<BlockT*> &ExitBlocks) const {
-  typedef GraphTraits<BlockT*> BlockTraits;
-  for (block_iterator BI = block_begin(), BE = block_end(); BI != BE; ++BI)
-    for (typename BlockTraits::ChildIteratorType I =
-           BlockTraits::child_begin(*BI), E = BlockTraits::child_end(*BI);
-         I != E; ++I)
-      if (!contains(*I))
+  for (const auto BB : blocks())
+    for (const auto Succ : children<BlockT*>(BB))
+      if (!contains(Succ))
         // Not in current loop? It must be an exit block.
-        ExitBlocks.push_back(*I);
+        ExitBlocks.push_back(Succ);
 }
 
 /// getExitBlock - If getExitBlocks would return exactly one block,
@@ -88,14 +82,11 @@ BlockT *LoopBase<BlockT, LoopT>::getExitBlock() const {
 template<class BlockT, class LoopT>
 void LoopBase<BlockT, LoopT>::
 getExitEdges(SmallVectorImpl<Edge> &ExitEdges) const {
-  typedef GraphTraits<BlockT*> BlockTraits;
-  for (block_iterator BI = block_begin(), BE = block_end(); BI != BE; ++BI)
-    for (typename BlockTraits::ChildIteratorType I =
-           BlockTraits::child_begin(*BI), E = BlockTraits::child_end(*BI);
-         I != E; ++I)
-      if (!contains(*I))
+  for (const auto BB : blocks())
+    for (const auto Succ : children<BlockT*>(BB))
+      if (!contains(Succ))
         // Not in current loop? It must be an exit block.
-        ExitEdges.push_back(Edge(*BI, *I));
+        ExitEdges.emplace_back(BB, Succ);
 }
 
 /// getLoopPreheader - If there is a preheader for this loop, return it.  A
@@ -134,15 +125,11 @@ BlockT *LoopBase<BlockT, LoopT>::getLoopPredecessor() const {
 
   // Loop over the predecessors of the header node...
   BlockT *Header = getHeader();
-  typedef GraphTraits<Inverse<BlockT*> > InvBlockTraits;
-  for (typename InvBlockTraits::ChildIteratorType PI =
-         InvBlockTraits::child_begin(Header),
-         PE = InvBlockTraits::child_end(Header); PI != PE; ++PI) {
-    typename InvBlockTraits::NodeRef N = *PI;
-    if (!contains(N)) {     // If the block is not in the loop...
-      if (Out && Out != N)
+  for (const auto Pred : children<Inverse<BlockT*>>(Header)) {
+    if (!contains(Pred)) {     // If the block is not in the loop...
+      if (Out && Out != Pred)
         return nullptr;     // Multiple predecessors outside the loop
-      Out = N;
+      Out = Pred;
     }
   }
 
@@ -156,17 +143,11 @@ BlockT *LoopBase<BlockT, LoopT>::getLoopPredecessor() const {
 template<class BlockT, class LoopT>
 BlockT *LoopBase<BlockT, LoopT>::getLoopLatch() const {
   BlockT *Header = getHeader();
-  typedef GraphTraits<Inverse<BlockT*> > InvBlockTraits;
-  typename InvBlockTraits::ChildIteratorType PI =
-    InvBlockTraits::child_begin(Header);
-  typename InvBlockTraits::ChildIteratorType PE =
-    InvBlockTraits::child_end(Header);
   BlockT *Latch = nullptr;
-  for (; PI != PE; ++PI) {
-    typename InvBlockTraits::NodeRef N = *PI;
-    if (contains(N)) {
+  for (const auto Pred : children<Inverse<BlockT*>>(Header)) {
+    if (contains(Pred)) {
       if (Latch) return nullptr;
-      Latch = N;
+      Latch = Pred;
     }
   }
 
@@ -394,11 +375,9 @@ static void discoverAndMapSubloop(LoopT *L, ArrayRef<BlockT*> Backedges,
       // within this subloop tree itself. Note that a predecessor may directly
       // reach another subloop that is not yet discovered to be a subloop of
       // this loop, which we must traverse.
-      for (typename InvBlockTraits::ChildIteratorType PI =
-             InvBlockTraits::child_begin(PredBB),
-             PE = InvBlockTraits::child_end(PredBB); PI != PE; ++PI) {
-        if (LI->getLoopFor(*PI) != Subloop)
-          ReverseCFGWorklist.push_back(*PI);
+      for (const auto Pred : children<Inverse<BlockT*>>(PredBB)) {
+        if (LI->getLoopFor(Pred) != Subloop)
+          ReverseCFGWorklist.push_back(Pred);
       }
     }
   }
@@ -482,13 +461,7 @@ analyze(const DominatorTreeBase<BlockT> &DomTree) {
     SmallVector<BlockT *, 4> Backedges;
 
     // Check each predecessor of the potential loop header.
-    typedef GraphTraits<Inverse<BlockT*> > InvBlockTraits;
-    for (typename InvBlockTraits::ChildIteratorType PI =
-           InvBlockTraits::child_begin(Header),
-           PE = InvBlockTraits::child_end(Header); PI != PE; ++PI) {
-
-      BlockT *Backedge = *PI;
-
+    for (const auto Backedge : children<Inverse<BlockT*>>(Header)) {
       // If Header dominates predBB, this is a new loop. Collect the backedges.
       if (DomTree.dominates(Header, Backedge)
           && DomTree.isReachableFromEntry(Backedge)) {
diff --git a/include/llvm/Analysis/MemoryBuiltins.h b/include/llvm/Analysis/MemoryBuiltins.h
index c5514316f75f..743faf2b67db 100644
--- a/include/llvm/Analysis/MemoryBuiltins.h
+++ b/include/llvm/Analysis/MemoryBuiltins.h
@@ -54,6 +54,11 @@ bool isCallocLikeFn(const Value *V, const TargetLibraryInfo *TLI,
                     bool LookThroughBitCast = false);
 
 /// \brief Tests if a value is a call or invoke to a library function that
+/// allocates memory similar to malloc or calloc.
+bool isMallocOrCallocLikeFn(const Value *V, const TargetLibraryInfo *TLI,
+                            bool LookThroughBitCast = false);
+
+/// \brief Tests if a value is a call or invoke to a library function that
 /// allocates memory (either malloc, calloc, or strdup like).
 bool isAllocLikeFn(const Value *V, const TargetLibraryInfo *TLI,
                    bool LookThroughBitCast = false);
diff --git a/include/llvm/Analysis/ScalarEvolution.h b/include/llvm/Analysis/ScalarEvolution.h
index 9a50de540f2b..91aeae0f728f 100644
--- a/include/llvm/Analysis/ScalarEvolution.h
+++ b/include/llvm/Analysis/ScalarEvolution.h
@@ -1159,8 +1159,20 @@ public:
   const SCEV *getConstant(const APInt &Val);
   const SCEV *getConstant(Type *Ty, uint64_t V, bool isSigned = false);
   const SCEV *getTruncateExpr(const SCEV *Op, Type *Ty);
+
+  typedef SmallDenseMap<std::pair<const SCEV *, Type *>, const SCEV *, 8>
+      ExtendCacheTy;
   const SCEV *getZeroExtendExpr(const SCEV *Op, Type *Ty);
+  const SCEV *getZeroExtendExprCached(const SCEV *Op, Type *Ty,
+                                      ExtendCacheTy &Cache);
+  const SCEV *getZeroExtendExprImpl(const SCEV *Op, Type *Ty,
+                                    ExtendCacheTy &Cache);
+
   const SCEV *getSignExtendExpr(const SCEV *Op, Type *Ty);
+  const SCEV *getSignExtendExprCached(const SCEV *Op, Type *Ty,
+                                      ExtendCacheTy &Cache);
+  const SCEV *getSignExtendExprImpl(const SCEV *Op, Type *Ty,
+                                    ExtendCacheTy &Cache);
   const SCEV *getAnyExtendExpr(const SCEV *Op, Type *Ty);
   const SCEV *getAddExpr(SmallVectorImpl<const SCEV *> &Ops,
                          SCEV::NoWrapFlags Flags = SCEV::FlagAnyWrap,