llvm · jurahul · Jun 23, 2025 · Jun 21, 2025
diff --git a/clang/include/clang/AST/ASTContext.h b/clang/include/clang/AST/ASTContext.h
@@ -814,7 +814,7 @@ class ASTContext : public RefCountedBase<ASTContext> {
 
   llvm::StringRef backupStr(llvm::StringRef S) const {
     char *Buf = new (*this) char[S.size()];
-    std::copy(S.begin(), S.end(), Buf);
+    llvm::copy(S, Buf);
     return llvm::StringRef(Buf, S.size());
   }
 

diff --git a/clang/include/clang/AST/OpenMPClause.h b/clang/include/clang/AST/OpenMPClause.h
@@ -387,7 +387,7 @@ template <class T> class OMPDirectiveListClause : public OMPClause {
     assert(
         DK.size() == NumKinds &&
         "Number of directive kinds is not the same as the preallocated buffer");
-    std::copy(DK.begin(), DK.end(), getDirectiveKinds().begin());
+    llvm::copy(DK, getDirectiveKinds().begin());
   }
 
   SourceLocation getLParenLoc() { return LParenLoc; }
@@ -5917,7 +5917,7 @@ class OMPMappableExprListClause : public OMPVarListClause<T>,
   void setUniqueDecls(ArrayRef<ValueDecl *> UDs) {
     assert(UDs.size() == NumUniqueDeclarations &&
            "Unexpected amount of unique declarations.");
-    std::copy(UDs.begin(), UDs.end(), getUniqueDeclsRef().begin());
+    llvm::copy(UDs, getUniqueDeclsRef().begin());
   }
 
   /// Get the number of lists per declaration that are in the trailing
@@ -5939,7 +5939,7 @@ class OMPMappableExprListClause : public OMPVarListClause<T>,
   void setDeclNumLists(ArrayRef<unsigned> DNLs) {
     assert(DNLs.size() == NumUniqueDeclarations &&
            "Unexpected amount of list numbers.");
-    std::copy(DNLs.begin(), DNLs.end(), getDeclNumListsRef().begin());
+    llvm::copy(DNLs, getDeclNumListsRef().begin());
   }
 
   /// Get the cumulative component lists sizes that are in the trailing
@@ -5965,7 +5965,7 @@ class OMPMappableExprListClause : public OMPVarListClause<T>,
   void setComponentListSizes(ArrayRef<unsigned> CLSs) {
     assert(CLSs.size() == NumComponentLists &&
            "Unexpected amount of component lists.");
-    std::copy(CLSs.begin(), CLSs.end(), getComponentListSizesRef().begin());
+    llvm::copy(CLSs, getComponentListSizesRef().begin());
   }
 
   /// Get the components that are in the trailing objects of the class.
@@ -5989,7 +5989,7 @@ class OMPMappableExprListClause : public OMPVarListClause<T>,
            "Unexpected amount of component lists.");
     assert(CLSs.size() == NumComponentLists &&
            "Unexpected amount of list sizes.");
-    std::copy(Components.begin(), Components.end(), getComponentsRef().begin());
+    llvm::copy(Components, getComponentsRef().begin());
   }
 
   /// Fill the clause information from the list of declarations and
@@ -6063,7 +6063,7 @@ class OMPMappableExprListClause : public OMPVarListClause<T>,
         ++CLSI;
 
         // Append components after the current components iterator.
-        CI = std::copy(C.begin(), C.end(), CI);
+        CI = llvm::copy(C, CI);
       }
     }
   }
@@ -6107,7 +6107,7 @@ class OMPMappableExprListClause : public OMPVarListClause<T>,
            "Unexpected number of user-defined mappers.");
     assert(SupportsMapper &&
            "Must be a clause that is possible to have user-defined mappers");
-    std::copy(DMDs.begin(), DMDs.end(), getUDMapperRefs().begin());
+    llvm::copy(DMDs, getUDMapperRefs().begin());
   }
 
 public:

diff --git a/clang/include/clang/AST/Stmt.h b/clang/include/clang/AST/Stmt.h
@@ -2214,7 +2214,7 @@ class AttributedStmt final
       : ValueStmt(AttributedStmtClass), SubStmt(SubStmt) {
     AttributedStmtBits.NumAttrs = Attrs.size();
     AttributedStmtBits.AttrLoc = Loc;
-    std::copy(Attrs.begin(), Attrs.end(), getAttrArrayPtr());
+    llvm::copy(Attrs, getAttrArrayPtr());
   }
 
   explicit AttributedStmt(EmptyShell Empty, unsigned NumAttrs)

diff --git a/clang/lib/AST/ASTImporter.cpp b/clang/lib/AST/ASTImporter.cpp
@@ -4123,7 +4123,7 @@ ExpectedDecl ASTNodeImporter::VisitFunctionDecl(FunctionDecl *D) {
         return std::move(Err);
       auto **Memory =
           new (Importer.getToContext()) CXXCtorInitializer *[NumInitializers];
-      std::copy(CtorInitializers.begin(), CtorInitializers.end(), Memory);
+      llvm::copy(CtorInitializers, Memory);
       auto *ToCtor = cast<CXXConstructorDecl>(ToFunction);
       ToCtor->setCtorInitializers(Memory);
       ToCtor->setNumCtorInitializers(NumInitializers);

diff --git a/clang/lib/AST/Decl.cpp b/clang/lib/AST/Decl.cpp
@@ -2110,7 +2110,7 @@ void QualifierInfo::setTemplateParameterListsInfo(
   if (!TPLists.empty()) {
     TemplParamLists = new (Context) TemplateParameterList *[TPLists.size()];
     NumTemplParamLists = TPLists.size();
-    std::copy(TPLists.begin(), TPLists.end(), TemplParamLists);
+    llvm::copy(TPLists, TemplParamLists);
   }
 }
 
@@ -3753,7 +3753,7 @@ void FunctionDecl::setParams(ASTContext &C,
   // Zero params -> null pointer.
   if (!NewParamInfo.empty()) {
     ParamInfo = new (C) ParmVarDecl*[NewParamInfo.size()];
-    std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo);
+    llvm::copy(NewParamInfo, ParamInfo);
   }
 }
 
@@ -5322,7 +5322,7 @@ void BlockDecl::setParams(ArrayRef<ParmVarDecl *> NewParamInfo) {
   if (!NewParamInfo.empty()) {
     NumParams = NewParamInfo.size();
     ParamInfo = new (getASTContext()) ParmVarDecl*[NewParamInfo.size()];
-    std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo);
+    llvm::copy(NewParamInfo, ParamInfo);
   }
 }
 
@@ -5379,7 +5379,7 @@ PragmaCommentDecl *PragmaCommentDecl::Create(const ASTContext &C,
   PragmaCommentDecl *PCD =
       new (C, DC, additionalSizeToAlloc<char>(Arg.size() + 1))
           PragmaCommentDecl(DC, CommentLoc, CommentKind);
-  memcpy(PCD->getTrailingObjects(), Arg.data(), Arg.size());
+  llvm::copy(Arg, PCD->getTrailingObjects());
   PCD->getTrailingObjects()[Arg.size()] = '\0';
   return PCD;
 }
@@ -5401,9 +5401,9 @@ PragmaDetectMismatchDecl::Create(const ASTContext &C, TranslationUnitDecl *DC,
   PragmaDetectMismatchDecl *PDMD =
       new (C, DC, additionalSizeToAlloc<char>(ValueStart + Value.size() + 1))
           PragmaDetectMismatchDecl(DC, Loc, ValueStart);
-  memcpy(PDMD->getTrailingObjects(), Name.data(), Name.size());
+  llvm::copy(Name, PDMD->getTrailingObjects());
   PDMD->getTrailingObjects()[Name.size()] = '\0';
-  memcpy(PDMD->getTrailingObjects() + ValueStart, Value.data(), Value.size());
+  llvm::copy(Value, PDMD->getTrailingObjects() + ValueStart);
   PDMD->getTrailingObjects()[ValueStart + Value.size()] = '\0';
   return PDMD;
 }
@@ -5443,9 +5443,9 @@ LabelDecl *LabelDecl::CreateDeserialized(ASTContext &C, GlobalDeclID ID) {
 
 void LabelDecl::setMSAsmLabel(StringRef Name) {
 char *Buffer = new (getASTContext(), 1) char[Name.size() + 1];
-  memcpy(Buffer, Name.data(), Name.size());
-  Buffer[Name.size()] = '\0';
-  MSAsmName = Buffer;
+llvm::copy(Name, Buffer);
+Buffer[Name.size()] = '\0';
+MSAsmName = Buffer;
 }
 
 void ValueDecl::anchor() {}
@@ -5828,7 +5828,7 @@ void HLSLBufferDecl::setDefaultBufferDecls(ArrayRef<Decl *> Decls) {
 
   // allocate array for default decls with ASTContext allocator
   Decl **DeclsArray = new (getASTContext()) Decl *[Decls.size()];
-  std::copy(Decls.begin(), Decls.end(), DeclsArray);
+  llvm::copy(Decls, DeclsArray);
   DefaultBufferDecls = ArrayRef<Decl *>(DeclsArray, Decls.size());
 }
 
@@ -5869,8 +5869,7 @@ HLSLRootSignatureDecl *HLSLRootSignatureDecl::Create(
                RootElements.size()))
           HLSLRootSignatureDecl(DC, Loc, ID, RootElements.size());
   auto *StoredElems = RSDecl->getElems();
-  std::uninitialized_copy(RootElements.begin(), RootElements.end(),
-                          StoredElems);
+  llvm::uninitialized_copy(RootElements, StoredElems);
   return RSDecl;
 }
 

diff --git a/clang/lib/AST/DeclObjC.cpp b/clang/lib/AST/DeclObjC.cpp
@@ -1512,7 +1512,7 @@ ObjCTypeParamList::ObjCTypeParamList(SourceLocation lAngleLoc,
                                      ArrayRef<ObjCTypeParamDecl *> typeParams,
                                      SourceLocation rAngleLoc)
     : Brackets(lAngleLoc, rAngleLoc), NumParams(typeParams.size()) {
-  std::copy(typeParams.begin(), typeParams.end(), begin());
+  llvm::copy(typeParams, begin());
 }
 
 ObjCTypeParamList *ObjCTypeParamList::create(

diff --git a/clang/lib/AST/ExprCXX.cpp b/clang/lib/AST/ExprCXX.cpp
@@ -261,9 +261,8 @@ CXXNewExpr::CXXNewExpr(bool IsGlobalNew, FunctionDecl *OperatorNew,
     getTrailingObjects<Stmt *>()[arraySizeOffset()] = *ArraySize;
   if (Initializer)
     getTrailingObjects<Stmt *>()[initExprOffset()] = Initializer;
-  for (unsigned I = 0; I != PlacementArgs.size(); ++I)
-    getTrailingObjects<Stmt *>()[placementNewArgsOffset() + I] =
-        PlacementArgs[I];
+  llvm::copy(PlacementArgs,
+             getTrailingObjects<Stmt *>() + placementNewArgsOffset());
   if (IsParenTypeId)
     getTrailingObjects<SourceRange>()[0] = TypeIdParens;
 
@@ -1208,10 +1207,8 @@ CXXConstructExpr::CXXConstructExpr(
   CXXConstructExprBits.Loc = Loc;
 
   Stmt **TrailingArgs = getTrailingArgs();
-  for (unsigned I = 0, N = Args.size(); I != N; ++I) {
-    assert(Args[I] && "NULL argument in CXXConstructExpr!");
-    TrailingArgs[I] = Args[I];
-  }
+  llvm::copy(Args, TrailingArgs);
+  assert(llvm::all_of(Args, [](const Stmt *Arg) { return Arg != nullptr; }));
 
   // CXXTemporaryObjectExpr does this itself after setting its TypeSourceInfo.
   if (SC == CXXConstructExprClass)
@@ -1472,8 +1469,7 @@ CXXUnresolvedConstructExpr::CXXUnresolvedConstructExpr(
       RParenLoc(RParenLoc) {
   CXXUnresolvedConstructExprBits.NumArgs = Args.size();
   auto **StoredArgs = getTrailingObjects();
-  for (unsigned I = 0; I != Args.size(); ++I)
-    StoredArgs[I] = Args[I];
+  llvm::copy(Args, StoredArgs);
   setDependence(computeDependence(this));
 }
 
@@ -1885,8 +1881,7 @@ TypeTraitExpr::TypeTraitExpr(QualType T, SourceLocation Loc, TypeTrait Kind,
   assert(Args.size() == TypeTraitExprBits.NumArgs &&
          "TypeTraitExprBits.NumArgs overflow!");
   auto **ToArgs = getTrailingObjects<TypeSourceInfo *>();
-  for (unsigned I = 0, N = Args.size(); I != N; ++I)
-    ToArgs[I] = Args[I];
+  llvm::copy(Args, ToArgs);
 
   setDependence(computeDependence(this));
 

diff --git a/clang/lib/AST/ExprConcepts.cpp b/clang/lib/AST/ExprConcepts.cpp
@@ -144,10 +144,8 @@ RequiresExpr::RequiresExpr(ASTContext &C, SourceLocation RequiresKWLoc,
     if (RequirementContainsError(R))
       setDependence(getDependence() | ExprDependence::Error);
   }
-  std::copy(LocalParameters.begin(), LocalParameters.end(),
-            getTrailingObjects<ParmVarDecl *>());
-  std::copy(Requirements.begin(), Requirements.end(),
-            getTrailingObjects<concepts::Requirement *>());
+  llvm::copy(LocalParameters, getTrailingObjects<ParmVarDecl *>());
+  llvm::copy(Requirements, getTrailingObjects<concepts::Requirement *>());
   RequiresExprBits.IsSatisfied |= Dependent;
   // FIXME: move the computing dependency logic to ComputeDependence.h
   if (ContainsUnexpandedParameterPack)

diff --git a/clang/lib/AST/ExprObjC.cpp b/clang/lib/AST/ExprObjC.cpp
@@ -163,10 +163,8 @@ void ObjCMessageExpr::initArgsAndSelLocs(ArrayRef<Expr *> Args,
     MyArgs[I] = Args[I];
 
   SelLocsKind = SelLocsK;
-  if (!isImplicit()) {
-    if (SelLocsK == SelLoc_NonStandard)
-      std::copy(SelLocs.begin(), SelLocs.end(), getStoredSelLocs());
-  }
+  if (!isImplicit() && SelLocsK == SelLoc_NonStandard)
+    llvm::copy(SelLocs, getStoredSelLocs());
 }
 
 ObjCMessageExpr *