diff --git a/llvm/include/llvm/Demangle/ItaniumDemangle.h b/llvm/include/llvm/Demangle/ItaniumDemangle.h
--- a/llvm/include/llvm/Demangle/ItaniumDemangle.h
+++ b/llvm/include/llvm/Demangle/ItaniumDemangle.h
@@ -16,6 +16,7 @@
 #ifndef LLVM_DEMANGLE_ITANIUMDEMANGLE_H
 #define LLVM_DEMANGLE_ITANIUMDEMANGLE_H
 
+#include "../ADT/STLExtras.h"
 #include "DemangleConfig.h"
 #include "StringView.h"
 #include "Utility.h"
@@ -1262,17 +1263,13 @@
 public:
   ParameterPack(NodeArray Data_) : Node(KParameterPack), Data(Data_) {
     ArrayCache = FunctionCache = RHSComponentCache = Cache::Unknown;
-    if (std::all_of(Data.begin(), Data.end(), [](Node* P) {
-          return P->ArrayCache == Cache::No;
-        }))
+    if (llvm::all_of(Data, [](Node *P) { return P->ArrayCache == Cache::No; }))
       ArrayCache = Cache::No;
-    if (std::all_of(Data.begin(), Data.end(), [](Node* P) {
-          return P->FunctionCache == Cache::No;
-        }))
+    if (llvm::all_of(Data,
+                     [](Node *P) { return P->FunctionCache == Cache::No; }))
       FunctionCache = Cache::No;
-    if (std::all_of(Data.begin(), Data.end(), [](Node* P) {
-          return P->RHSComponentCache == Cache::No;
-        }))
+    if (llvm::all_of(Data,
+                     [](Node *P) { return P->RHSComponentCache == Cache::No; }))
       RHSComponentCache = Cache::No;
   }
 
diff --git a/llvm/lib/Analysis/TypeMetadataUtils.cpp b/llvm/lib/Analysis/TypeMetadataUtils.cpp
--- a/llvm/lib/Analysis/TypeMetadataUtils.cpp
+++ b/llvm/lib/Analysis/TypeMetadataUtils.cpp
@@ -61,7 +61,7 @@
     } else if (auto GEP = dyn_cast<GetElementPtrInst>(User)) {
       // Take into account the GEP offset.
       if (VPtr == GEP->getPointerOperand() && GEP->hasAllConstantIndices()) {
-        SmallVector<Value *, 8> Indices(GEP->op_begin() + 1, GEP->op_end());
+        SmallVector<Value *, 8> Indices(drop_begin(GEP->operands()));
         int64_t GEPOffset = M->getDataLayout().getIndexedOffsetInType(
             GEP->getSourceElementType(), Indices);
         findLoadCallsAtConstantOffset(M, DevirtCalls, User, Offset + GEPOffset,
diff --git a/llvm/lib/IR/Verifier.cpp b/llvm/lib/IR/Verifier.cpp
--- a/llvm/lib/IR/Verifier.cpp
+++ b/llvm/lib/IR/Verifier.cpp
@@ -4526,8 +4526,8 @@
     visitCallStackMetadata(StackMD);
 
     // Check that remaining operands are MDString.
-    Check(std::all_of(MIB->op_begin() + 1, MIB->op_end(),
-                      [](const MDOperand &Op) { return isa<MDString>(Op); }),
+    Check(llvm::all_of(llvm::drop_begin(MIB->operands()),
+                       [](const MDOperand &Op) { return isa<MDString>(Op); }),
           "Not all !memprof MemInfoBlock operands 1 to N are MDString", MIB);
   }
 }
diff --git a/llvm/lib/ProfileData/InstrProfReader.cpp b/llvm/lib/ProfileData/InstrProfReader.cpp
--- a/llvm/lib/ProfileData/InstrProfReader.cpp
+++ b/llvm/lib/ProfileData/InstrProfReader.cpp
@@ -14,6 +14,7 @@
 #include "llvm/ProfileData/InstrProfReader.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/IR/ProfileSummary.h"
@@ -161,8 +162,8 @@
   size_t count = std::min(Buffer.getBufferSize(), sizeof(uint64_t));
   StringRef buffer = Buffer.getBufferStart();
   return count == 0 ||
-         std::all_of(buffer.begin(), buffer.begin() + count,
-                     [](char c) { return isPrint(c) || isSpace(c); });
+         llvm::all_of(drop_end(buffer, buffer.size() - count),
+                      [](char c) { return isPrint(c) || isSpace(c); });
 }
 
 // Read the profile variant flag from the header: ":FE" means this is a FE
diff --git a/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.cpp b/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.cpp
--- a/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.cpp
@@ -20,6 +20,7 @@
 #include "SPIRVTargetMachine.h"
 #include "SPIRVUtils.h"
 #include "TargetInfo/SPIRVTargetInfo.h"
+#include "llvm/ADT/STLExtras.h"
 #include "llvm/CodeGen/MachineModuleInfo.h"
 #include "llvm/CodeGen/TargetPassConfig.h"
 
@@ -77,10 +78,9 @@
   // If there are no capabilities, or we can't satisfy the version or
   // capability requirements, use the list of extensions (if the subtarget
   // can handle them all).
-  if (std::all_of(ReqExts.begin(), ReqExts.end(),
-                  [&ST](const SPIRV::Extension::Extension &Ext) {
-                    return ST.canUseExtension(Ext);
-                  })) {
+  if (llvm::all_of(ReqExts, [&ST](const SPIRV::Extension::Extension &Ext) {
+        return ST.canUseExtension(Ext);
+      })) {
     return {true, {}, ReqExts, 0, 0}; // TODO: add versions to extensions.
   }
   return {false, {}, {}, 0, 0};