Index: lib/DebugInfo/CodeView/DebugCrossImpSubsection.cpp
===================================================================
--- lib/DebugInfo/CodeView/DebugCrossImpSubsection.cpp
+++ lib/DebugInfo/CodeView/DebugCrossImpSubsection.cpp
@@ -79,7 +79,7 @@
   for (const auto &M : Mappings)
     Ids.push_back(&M);
 
-  std::sort(Ids.begin(), Ids.end(), [this](const T &L1, const T &L2) {
+  llvm::sort(Ids.begin(), Ids.end(), [this](const T &L1, const T &L2) {
     return Strings.getIdForString(L1->getKey()) <
            Strings.getIdForString(L2->getKey());
   });
Index: lib/DebugInfo/DWARF/DWARFContext.cpp
===================================================================
--- lib/DebugInfo/DWARF/DWARFContext.cpp
+++ lib/DebugInfo/DWARF/DWARFContext.cpp
@@ -108,12 +108,12 @@
   // Sort the contributions so that any invalid ones are placed at
   // the start of the contributions vector. This way they are reported
   // first.
-  std::sort(Contributions.begin(), Contributions.end(),
-            [](const Optional<StrOffsetsContributionDescriptor> &L,
-               const Optional<StrOffsetsContributionDescriptor> &R) {
-              if (L && R) return L->Base < R->Base;
-              return R.hasValue();
-            });
+  llvm::sort(Contributions.begin(), Contributions.end(),
+             [](const Optional<StrOffsetsContributionDescriptor> &L,
+                const Optional<StrOffsetsContributionDescriptor> &R) {
+               if (L && R) return L->Base < R->Base;
+               return R.hasValue();
+             });
 
   // Uniquify contributions, as it is possible that units (specifically
   // type units in dwo or dwp files) share contributions. We don't want
Index: lib/DebugInfo/DWARF/DWARFDebugAranges.cpp
===================================================================
--- lib/DebugInfo/DWARF/DWARFDebugAranges.cpp
+++ lib/DebugInfo/DWARF/DWARFDebugAranges.cpp
@@ -80,7 +80,7 @@
 void DWARFDebugAranges::construct() {
   std::multiset<uint32_t> ValidCUs;  // Maintain the set of CUs describing
                                      // a current address range.
-  std::sort(Endpoints.begin(), Endpoints.end());
+  llvm::sort(Endpoints.begin(), Endpoints.end());
   uint64_t PrevAddress = -1ULL;
   for (const auto &E : Endpoints) {
     if (PrevAddress < E.Address && !ValidCUs.empty()) {
Index: lib/DebugInfo/DWARF/DWARFDebugLine.cpp
===================================================================
--- lib/DebugInfo/DWARF/DWARFDebugLine.cpp
+++ lib/DebugInfo/DWARF/DWARFDebugLine.cpp
@@ -835,7 +835,7 @@
 
   // Sort all sequences so that address lookup will work faster.
   if (!Sequences.empty()) {
-    std::sort(Sequences.begin(), Sequences.end(), Sequence::orderByLowPC);
+    llvm::sort(Sequences.begin(), Sequences.end(), Sequence::orderByLowPC);
     // Note: actually, instruction address ranges of sequences should not
     // overlap (in shared objects and executables). If they do, the address
     // lookup would still work, though, but result would be ambiguous.