Index: include/llvm/Analysis/LoopInfoImpl.h
===================================================================
--- include/llvm/Analysis/LoopInfoImpl.h
+++ include/llvm/Analysis/LoopInfoImpl.h
@@ -572,8 +572,8 @@
 
 template <typename T>
 bool compareVectors(std::vector<T> &BB1, std::vector<T> &BB2) {
-  std::sort(BB1.begin(), BB1.end());
-  std::sort(BB2.begin(), BB2.end());
+  llvm::sort(BB1.begin(), BB1.end());
+  llvm::sort(BB2.begin(), BB2.end());
   return BB1 == BB2;
 }
 
Index: include/llvm/CodeGen/SlotIndexes.h
===================================================================
--- include/llvm/CodeGen/SlotIndexes.h
+++ include/llvm/CodeGen/SlotIndexes.h
@@ -674,7 +674,7 @@
       idx2MBBMap.push_back(IdxMBBPair(startIdx, mbb));
 
       renumberIndexes(newItr);
-      std::sort(idx2MBBMap.begin(), idx2MBBMap.end(), Idx2MBBCompare());
+      llvm::sort(idx2MBBMap.begin(), idx2MBBMap.end(), Idx2MBBCompare());
     }
 
     /// \brief Free the resources that were required to maintain a SlotIndex.
Index: include/llvm/ProfileData/InstrProf.h
===================================================================
--- include/llvm/ProfileData/InstrProf.h
+++ include/llvm/ProfileData/InstrProf.h
@@ -544,9 +544,9 @@
 void InstrProfSymtab::finalizeSymtab() {
   if (Sorted)
     return;
-  std::sort(MD5NameMap.begin(), MD5NameMap.end(), less_first());
-  std::sort(MD5FuncMap.begin(), MD5FuncMap.end(), less_first());
-  std::sort(AddrToMD5Map.begin(), AddrToMD5Map.end(), less_first());
+  llvm::sort(MD5NameMap.begin(), MD5NameMap.end(), less_first());
+  llvm::sort(MD5FuncMap.begin(), MD5FuncMap.end(), less_first());
+  llvm::sort(AddrToMD5Map.begin(), AddrToMD5Map.end(), less_first());
   AddrToMD5Map.erase(std::unique(AddrToMD5Map.begin(), AddrToMD5Map.end()),
                      AddrToMD5Map.end());
   Sorted = true;
Index: include/llvm/Support/GenericDomTreeConstruction.h
===================================================================
--- include/llvm/Support/GenericDomTreeConstruction.h
+++ include/llvm/Support/GenericDomTreeConstruction.h
@@ -1241,11 +1241,11 @@
         Operations[{U.getTo(), U.getFrom()}] = int(i);
     }
 
-    std::sort(Result.begin(), Result.end(),
-              [&Operations](const UpdateT &A, const UpdateT &B) {
-                return Operations[{A.getFrom(), A.getTo()}] >
-                       Operations[{B.getFrom(), B.getTo()}];
-              });
+    llvm::sort(Result.begin(), Result.end(),
+               [&Operations](const UpdateT &A, const UpdateT &B) {
+                 return Operations[{A.getFrom(), A.getTo()}] >
+                        Operations[{B.getFrom(), B.getTo()}];
+               });
   }
 
   static void ApplyNextUpdate(DomTreeT &DT, BatchUpdateInfo &BUI) {
@@ -1430,10 +1430,10 @@
       // Make a copy and sort it such that it is possible to check if there are
       // no gaps between DFS numbers of adjacent children.
       SmallVector<TreeNodePtr, 8> Children(Node->begin(), Node->end());
-      std::sort(Children.begin(), Children.end(),
-                [](const TreeNodePtr Ch1, const TreeNodePtr Ch2) {
-                  return Ch1->getDFSNumIn() < Ch2->getDFSNumIn();
-                });
+      llvm::sort(Children.begin(), Children.end(),
+                 [](const TreeNodePtr Ch1, const TreeNodePtr Ch2) {
+                   return Ch1->getDFSNumIn() < Ch2->getDFSNumIn();
+                 });
 
       auto PrintChildrenError = [Node, &Children, PrintNodeAndDFSNums](
           const TreeNodePtr FirstCh, const TreeNodePtr SecondCh) {
Index: include/llvm/Support/Parallel.h
===================================================================
--- include/llvm/Support/Parallel.h
+++ include/llvm/Support/Parallel.h
@@ -118,7 +118,7 @@
                          const Comparator &Comp, TaskGroup &TG, size_t Depth) {
   // Do a sequential sort for small inputs.
   if (std::distance(Start, End) < detail::MinParallelSize || Depth == 0) {
-    std::sort(Start, End, Comp);
+    llvm::sort(Start, End, Comp);
     return;
   }
 
@@ -200,7 +200,7 @@
           const Comparator &Comp = Comparator()) {
   static_assert(is_execution_policy<Policy>::value,
                 "Invalid execution policy!");
-  std::sort(Start, End, Comp);
+  llvm::sort(Start, End, Comp);
 }
 
 template <class Policy, class IterTy, class FuncTy>
Index: include/llvm/Support/ScopedPrinter.h
===================================================================
--- include/llvm/Support/ScopedPrinter.h
+++ include/llvm/Support/ScopedPrinter.h
@@ -138,7 +138,7 @@
       }
     }
 
-    std::sort(SetFlags.begin(), SetFlags.end(), &flagName<TFlag>);
+    llvm::sort(SetFlags.begin(), SetFlags.end(), &flagName<TFlag>);
 
     startLine() << Label << " [ (" << hex(Value) << ")\n";
     for (const auto &Flag : SetFlags) {