diff --git a/llvm/lib/Analysis/AssumptionCache.cpp b/llvm/lib/Analysis/AssumptionCache.cpp
--- a/llvm/lib/Analysis/AssumptionCache.cpp
+++ b/llvm/lib/Analysis/AssumptionCache.cpp
@@ -175,7 +175,7 @@
     return;
 
   for (auto &A : AVI->second)
-    if (std::find(NAVV.begin(), NAVV.end(), A) == NAVV.end())
+    if (!llvm::is_contained(NAVV, A))
       NAVV.push_back(A);
   AffectedValues.erase(OV);
 }
diff --git a/llvm/lib/CodeGen/GlobalISel/LegalityPredicates.cpp b/llvm/lib/CodeGen/GlobalISel/LegalityPredicates.cpp
--- a/llvm/lib/CodeGen/GlobalISel/LegalityPredicates.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalityPredicates.cpp
@@ -24,7 +24,7 @@
                               std::initializer_list<LLT> TypesInit) {
   SmallVector<LLT, 4> Types = TypesInit;
   return [=](const LegalityQuery &Query) {
-    return std::find(Types.begin(), Types.end(), Query.Types[TypeIdx]) != Types.end();
+    return llvm::is_contained(Types, Query.Types[TypeIdx]);
   };
 }
 
@@ -34,7 +34,7 @@
   SmallVector<std::pair<LLT, LLT>, 4> Types = TypesInit;
   return [=](const LegalityQuery &Query) {
     std::pair<LLT, LLT> Match = {Query.Types[TypeIdx0], Query.Types[TypeIdx1]};
-    return std::find(Types.begin(), Types.end(), Match) != Types.end();
+    return llvm::is_contained(Types, Match);
   };
 }
 
diff --git a/llvm/lib/Target/AMDGPU/AMDGPULibCalls.cpp b/llvm/lib/Target/AMDGPU/AMDGPULibCalls.cpp
--- a/llvm/lib/Target/AMDGPU/AMDGPULibCalls.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPULibCalls.cpp
@@ -495,8 +495,7 @@
 }
 
 bool AMDGPULibCalls::useNativeFunc(const StringRef F) const {
-  return AllNative ||
-         std::find(UseNative.begin(), UseNative.end(), F) != UseNative.end();
+  return AllNative || llvm::is_contained(UseNative, F);
 }
 
 void AMDGPULibCalls::initNativeFuncs() {
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUUnifyMetadata.cpp b/llvm/lib/Target/AMDGPU/AMDGPUUnifyMetadata.cpp
--- a/llvm/lib/Target/AMDGPU/AMDGPUUnifyMetadata.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUUnifyMetadata.cpp
@@ -96,7 +96,7 @@
     SmallVector<Metadata *, 4> All;
     for (auto MD : NamedMD->operands())
       for (const auto &Op : MD->operands())
-        if (std::find(All.begin(), All.end(), Op.get()) == All.end())
+        if (!llvm::is_contained(All, Op.get()))
           All.push_back(Op.get());
 
     NamedMD->eraseFromParent();
diff --git a/llvm/lib/Target/BPF/BPFMIChecking.cpp b/llvm/lib/Target/BPF/BPFMIChecking.cpp
--- a/llvm/lib/Target/BPF/BPFMIChecking.cpp
+++ b/llvm/lib/Target/BPF/BPFMIChecking.cpp
@@ -143,12 +143,10 @@
     return true;
 
   // Otherwise, return true if any aliased SuperReg of GPR32 is not dead.
-  std::vector<unsigned>::iterator search_begin = GPR64DeadDefs.begin();
-  std::vector<unsigned>::iterator search_end = GPR64DeadDefs.end();
   for (auto I : GPR32LiveDefs)
     for (MCSuperRegIterator SR(I, TRI); SR.isValid(); ++SR)
-       if (std::find(search_begin, search_end, *SR) == search_end)
-         return true;
+      if (!llvm::is_contained(GPR64DeadDefs, *SR))
+        return true;
 
   return false;
 }
diff --git a/llvm/lib/Transforms/IPO/GlobalOpt.cpp b/llvm/lib/Transforms/IPO/GlobalOpt.cpp
--- a/llvm/lib/Transforms/IPO/GlobalOpt.cpp
+++ b/llvm/lib/Transforms/IPO/GlobalOpt.cpp
@@ -2221,8 +2221,7 @@
     BlockFrequencyInfo &CallerBFI = GetBFI(*CallerFunc);
     if (!isColdCallSite(CB, CallerBFI))
       return false;
-    auto It = std::find(AllCallsCold.begin(), AllCallsCold.end(), CallerFunc);
-    if (It == AllCallsCold.end())
+    if (!llvm::is_contained(AllCallsCold, CallerFunc))
       return false;
   }
   return true;
diff --git a/llvm/lib/Transforms/IPO/PartialInlining.cpp b/llvm/lib/Transforms/IPO/PartialInlining.cpp
--- a/llvm/lib/Transforms/IPO/PartialInlining.cpp
+++ b/llvm/lib/Transforms/IPO/PartialInlining.cpp
@@ -1181,8 +1181,7 @@
   // (i.e. not to be extracted to the out of line function)
   auto ToBeInlined = [&, this](BasicBlock *BB) {
     return BB == ClonedOI->ReturnBlock ||
-           (std::find(ClonedOI->Entries.begin(), ClonedOI->Entries.end(), BB) !=
-            ClonedOI->Entries.end());
+           llvm::is_contained(ClonedOI->Entries, BB);
   };
 
   assert(ClonedOI && "Expecting OutlineInfo for single region outline");
diff --git a/llvm/lib/Transforms/Scalar/GVNSink.cpp b/llvm/lib/Transforms/Scalar/GVNSink.cpp
--- a/llvm/lib/Transforms/Scalar/GVNSink.cpp
+++ b/llvm/lib/Transforms/Scalar/GVNSink.cpp
@@ -158,8 +158,7 @@
 
   void restrictToBlocks(SmallSetVector<BasicBlock *, 4> &Blocks) {
     for (auto II = Insts.begin(); II != Insts.end();) {
-      if (std::find(Blocks.begin(), Blocks.end(), (*II)->getParent()) ==
-          Blocks.end()) {
+      if (!llvm::is_contained(Blocks, (*II)->getParent())) {
         ActiveBlocks.remove((*II)->getParent());
         II = Insts.erase(II);
       } else {
@@ -277,8 +276,7 @@
     auto VI = Values.begin();
     while (BI != Blocks.end()) {
       assert(VI != Values.end());
-      if (std::find(NewBlocks.begin(), NewBlocks.end(), *BI) ==
-          NewBlocks.end()) {
+      if (!llvm::is_contained(NewBlocks, *BI)) {
         BI = Blocks.erase(BI);
         VI = Values.erase(VI);
       } else {
diff --git a/llvm/lib/Transforms/Vectorize/VPlanSLP.cpp b/llvm/lib/Transforms/Vectorize/VPlanSLP.cpp
--- a/llvm/lib/Transforms/Vectorize/VPlanSLP.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanSLP.cpp
@@ -124,7 +124,7 @@
     for (auto &I : *Parent) {
       auto *VPI = cast<VPInstruction>(&I);
       if (VPI->getOpcode() == Instruction::Load &&
-          std::find(Operands.begin(), Operands.end(), VPI) != Operands.end())
+          llvm::is_contained(Operands, VPI))
         LoadsSeen++;
 
       if (LoadsSeen == Operands.size())
diff --git a/llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp b/llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp
--- a/llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp
@@ -65,9 +65,7 @@
     for (const VPBlockBase *Succ : Successors) {
       // There must be a bi-directional link between block and successor.
       const auto &SuccPreds = Succ->getPredecessors();
-      assert(std::find(SuccPreds.begin(), SuccPreds.end(), VPB) !=
-                 SuccPreds.end() &&
-             "Missing predecessor link.");
+      assert(llvm::is_contained(SuccPreds, VPB) && "Missing predecessor link.");
       (void)SuccPreds;
     }
 
@@ -86,9 +84,7 @@
 
       // There must be a bi-directional link between block and predecessor.
       const auto &PredSuccs = Pred->getSuccessors();
-      assert(std::find(PredSuccs.begin(), PredSuccs.end(), VPB) !=
-                 PredSuccs.end() &&
-             "Missing successor link.");
+      assert(llvm::is_contained(PredSuccs, VPB) && "Missing successor link.");
       (void)PredSuccs;
     }
   }
diff --git a/llvm/tools/bugpoint/ExtractFunction.cpp b/llvm/tools/bugpoint/ExtractFunction.cpp
--- a/llvm/tools/bugpoint/ExtractFunction.cpp
+++ b/llvm/tools/bugpoint/ExtractFunction.cpp
@@ -386,7 +386,7 @@
   for (Function &F : *M)
     for (BasicBlock &BB : F)
       // Check if this block is going to be extracted.
-      if (std::find(BBs.begin(), BBs.end(), &BB) == BBs.end())
+      if (!llvm::is_contained(BBs, &BB))
         BlocksToExtract.push_back(&BB);
 
   raw_fd_ostream OS(Temp->FD, /*shouldClose*/ false);
diff --git a/llvm/tools/llvm-exegesis/lib/Analysis.cpp b/llvm/tools/llvm-exegesis/lib/Analysis.cpp
--- a/llvm/tools/llvm-exegesis/lib/Analysis.cpp
+++ b/llvm/tools/llvm-exegesis/lib/Analysis.cpp
@@ -28,7 +28,7 @@
 template <EscapeTag Tag> void writeEscaped(raw_ostream &OS, const StringRef S);
 
 template <> void writeEscaped<kEscapeCsv>(raw_ostream &OS, const StringRef S) {
-  if (std::find(S.begin(), S.end(), kCsvSep) == S.end()) {
+  if (!llvm::is_contained(S, kCsvSep)) {
     OS << S;
   } else {
     // Needs escaping.