[clang] e5c7c17 - [clang] Rename StringRef _lower() method calls to _insensitive()

David Blaikie via cfe-commits cfe-commits at lists.llvm.org
Mon Jun 28 11:38:11 PDT 2021


Was this design/code reviewed (there's no mention in the commit message of
a link to a phab review, for instance)? Probably worth some discussion - if
there was a review, could you link it here in a reply?

On Thu, Jun 24, 2021 at 2:23 PM Martin Storsjö via cfe-commits <
cfe-commits at lists.llvm.org> wrote:

>
> Author: Martin Storsjö
> Date: 2021-06-25T00:22:01+03:00
> New Revision: e5c7c171e5db6af1e3dca1059df4287b0d147eaf
>
> URL:
> https://github.com/llvm/llvm-project/commit/e5c7c171e5db6af1e3dca1059df4287b0d147eaf
> DIFF:
> https://github.com/llvm/llvm-project/commit/e5c7c171e5db6af1e3dca1059df4287b0d147eaf.diff
>
> LOG: [clang] Rename StringRef _lower() method calls to _insensitive()
>
> This is mostly a mechanical change, but a testcase that contains
> parts of the StringRef class (clang/test/Analysis/llvm-conventions.cpp)
> isn't touched.
>
> Added:
>
>
> Modified:
>     clang/lib/ASTMatchers/Dynamic/Marshallers.cpp
>     clang/lib/Analysis/CalledOnceCheck.cpp
>     clang/lib/Analysis/RetainSummaryManager.cpp
>     clang/lib/Basic/FileManager.cpp
>     clang/lib/CodeGen/TargetInfo.cpp
>     clang/lib/Driver/Driver.cpp
>     clang/lib/Driver/ToolChains/Arch/RISCV.cpp
>     clang/lib/Driver/ToolChains/Clang.cpp
>     clang/lib/Driver/ToolChains/Fuchsia.cpp
>     clang/lib/Driver/ToolChains/Gnu.cpp
>     clang/lib/Driver/ToolChains/Hexagon.cpp
>     clang/lib/Driver/ToolChains/MSVC.cpp
>     clang/lib/Driver/ToolChains/MinGW.cpp
>     clang/lib/Format/Format.cpp
>     clang/lib/Format/SortJavaScriptImports.cpp
>     clang/lib/Format/UsingDeclarationsSorter.cpp
>     clang/lib/Frontend/CompilerInvocation.cpp
>     clang/lib/Lex/HeaderMap.cpp
>     clang/lib/Lex/PPDirectives.cpp
>     clang/lib/Lex/PPMacroExpansion.cpp
>     clang/lib/Sema/CodeCompleteConsumer.cpp
>     clang/lib/Sema/SemaChecking.cpp
>     clang/lib/Sema/SemaCodeComplete.cpp
>     clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
>     clang/lib/StaticAnalyzer/Checkers/ContainerModeling.cpp
>     clang/lib/StaticAnalyzer/Checkers/GCDAntipatternChecker.cpp
>     clang/lib/StaticAnalyzer/Checkers/Iterator.cpp
>     clang/lib/StaticAnalyzer/Checkers/MallocChecker.cpp
>     clang/lib/Tooling/Inclusions/HeaderIncludes.cpp
>     clang/lib/Tooling/InterpolatingCompilationDatabase.cpp
>     clang/tools/clang-refactor/TestSupport.cpp
>     clang/tools/clang-scan-deps/ClangScanDeps.cpp
>     clang/tools/driver/driver.cpp
>     clang/tools/libclang/CIndexCodeCompletion.cpp
>     clang/unittests/Tooling/CompilationDatabaseTest.cpp
>
> Removed:
>
>
>
>
> ################################################################################
> diff  --git a/clang/lib/ASTMatchers/Dynamic/Marshallers.cpp
> b/clang/lib/ASTMatchers/Dynamic/Marshallers.cpp
> index f6fdbe868e2df..40db70e6f4a51 100644
> --- a/clang/lib/ASTMatchers/Dynamic/Marshallers.cpp
> +++ b/clang/lib/ASTMatchers/Dynamic/Marshallers.cpp
> @@ -20,7 +20,7 @@ getBestGuess(llvm::StringRef Search,
> llvm::ArrayRef<llvm::StringRef> Allowed,
>      ++MaxEditDistance;
>    llvm::StringRef Res;
>    for (const llvm::StringRef &Item : Allowed) {
> -    if (Item.equals_lower(Search)) {
> +    if (Item.equals_insensitive(Search)) {
>        assert(!Item.equals(Search) && "This should be handled earlier
> on.");
>        MaxEditDistance = 1;
>        Res = Item;
> @@ -40,7 +40,7 @@ getBestGuess(llvm::StringRef Search,
> llvm::ArrayRef<llvm::StringRef> Allowed,
>        auto NoPrefix = Item;
>        if (!NoPrefix.consume_front(DropPrefix))
>          continue;
> -      if (NoPrefix.equals_lower(Search)) {
> +      if (NoPrefix.equals_insensitive(Search)) {
>          if (NoPrefix.equals(Search))
>            return Item.str();
>          MaxEditDistance = 1;
>
> diff  --git a/clang/lib/Analysis/CalledOnceCheck.cpp
> b/clang/lib/Analysis/CalledOnceCheck.cpp
> index db094129a9608..661f7b999f2b9 100644
> --- a/clang/lib/Analysis/CalledOnceCheck.cpp
> +++ b/clang/lib/Analysis/CalledOnceCheck.cpp
> @@ -478,7 +478,7 @@ bool mentionsAnyOfConventionalNames(const Expr *E) {
>      return llvm::any_of(
>          CONVENTIONAL_CONDITIONS,
>          [ConditionName](const llvm::StringLiteral &Conventional) {
> -          return ConditionName.contains_lower(Conventional);
> +          return ConditionName.contains_insensitive(Conventional);
>          });
>    });
>  }
>
> diff  --git a/clang/lib/Analysis/RetainSummaryManager.cpp
> b/clang/lib/Analysis/RetainSummaryManager.cpp
> index 58ead1dfe3522..7ed1e40333f43 100644
> --- a/clang/lib/Analysis/RetainSummaryManager.cpp
> +++ b/clang/lib/Analysis/RetainSummaryManager.cpp
> @@ -189,20 +189,22 @@ static bool hasRCAnnotation(const Decl *D, StringRef
> rcAnnotation) {
>  }
>
>  static bool isRetain(const FunctionDecl *FD, StringRef FName) {
> -  return FName.startswith_lower("retain") ||
> FName.endswith_lower("retain");
> +  return FName.startswith_insensitive("retain") ||
> +         FName.endswith_insensitive("retain");
>  }
>
>  static bool isRelease(const FunctionDecl *FD, StringRef FName) {
> -  return FName.startswith_lower("release") ||
> FName.endswith_lower("release");
> +  return FName.startswith_insensitive("release") ||
> +         FName.endswith_insensitive("release");
>  }
>
>  static bool isAutorelease(const FunctionDecl *FD, StringRef FName) {
> -  return FName.startswith_lower("autorelease") ||
> -         FName.endswith_lower("autorelease");
> +  return FName.startswith_insensitive("autorelease") ||
> +         FName.endswith_insensitive("autorelease");
>  }
>
>  static bool isMakeCollectable(StringRef FName) {
> -  return FName.contains_lower("MakeCollectable");
> +  return FName.contains_insensitive("MakeCollectable");
>  }
>
>  /// A function is OSObject related if it is declared on a subclass
> @@ -1100,7 +1102,7 @@ RetainSummaryManager::getStandardMethodSummary(const
> ObjCMethodDecl *MD,
>    if (S.isKeywordSelector()) {
>      for (unsigned i = 0, e = S.getNumArgs(); i != e; ++i) {
>        StringRef Slot = S.getNameForSlot(i);
> -      if (Slot.substr(Slot.size() - 8).equals_lower("delegate")) {
> +      if (Slot.substr(Slot.size() - 8).equals_insensitive("delegate")) {
>          if (ResultEff == ObjCInitRetE)
>            ResultEff = RetEffect::MakeNoRetHard();
>          else
>
> diff  --git a/clang/lib/Basic/FileManager.cpp
> b/clang/lib/Basic/FileManager.cpp
> index d39d7ba22643b..df306bd83136e 100644
> --- a/clang/lib/Basic/FileManager.cpp
> +++ b/clang/lib/Basic/FileManager.cpp
> @@ -128,7 +128,7 @@ FileManager::getDirectoryRef(StringRef DirName, bool
> CacheFailure) {
>    // Stat("C:") does not recognize "C:" as a valid directory
>    std::string DirNameStr;
>    if (DirName.size() > 1 && DirName.back() == ':' &&
> -      DirName.equals_lower(llvm::sys::path::root_name(DirName))) {
> +      DirName.equals_insensitive(llvm::sys::path::root_name(DirName))) {
>      DirNameStr = DirName.str() + '.';
>      DirName = DirNameStr;
>    }
>
> diff  --git a/clang/lib/CodeGen/TargetInfo.cpp
> b/clang/lib/CodeGen/TargetInfo.cpp
> index 2b3c0e3492a05..e9565a5aef63d 100644
> --- a/clang/lib/CodeGen/TargetInfo.cpp
> +++ b/clang/lib/CodeGen/TargetInfo.cpp
> @@ -2610,7 +2610,7 @@ static std::string
> qualifyWindowsLibrary(llvm::StringRef Lib) {
>    bool Quote = (Lib.find(' ') != StringRef::npos);
>    std::string ArgStr = Quote ? "\"" : "";
>    ArgStr += Lib;
> -  if (!Lib.endswith_lower(".lib") && !Lib.endswith_lower(".a"))
> +  if (!Lib.endswith_insensitive(".lib") &&
> !Lib.endswith_insensitive(".a"))
>      ArgStr += ".lib";
>    ArgStr += Quote ? "\"" : "";
>    return ArgStr;
>
> diff  --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
> index 930941fe8558c..1afaaba79105b 100644
> --- a/clang/lib/Driver/Driver.cpp
> +++ b/clang/lib/Driver/Driver.cpp
> @@ -591,9 +591,9 @@ static llvm::Triple computeTargetTriple(const Driver
> &D,
>    A = Args.getLastArg(options::OPT_march_EQ);
>    if (A && Target.isRISCV()) {
>      StringRef ArchName = A->getValue();
> -    if (ArchName.startswith_lower("rv32"))
> +    if (ArchName.startswith_insensitive("rv32"))
>        Target.setArch(llvm::Triple::riscv32);
> -    else if (ArchName.startswith_lower("rv64"))
> +    else if (ArchName.startswith_insensitive("rv64"))
>        Target.setArch(llvm::Triple::riscv64);
>    }
>
> @@ -1755,7 +1755,7 @@ void Driver::HandleAutocompletions(StringRef
> PassedFlags) const {
>    // case-insensitive sorting for consistency with the -help option
>    // which prints out options in the case-insensitive alphabetical order.
>    llvm::sort(SuggestedCompletions, [](StringRef A, StringRef B) {
> -    if (int X = A.compare_lower(B))
> +    if (int X = A.compare_insensitive(B))
>        return X < 0;
>      return A.compare(B) > 0;
>    });
> @@ -3585,7 +3585,8 @@ void Driver::handleArguments(Compilation &C,
> DerivedArgList &Args,
>      if (Args.hasArg(options::OPT_emit_llvm))
>        Diag(clang::diag::err_drv_emit_llvm_link);
>      if (IsCLMode() && LTOMode != LTOK_None &&
> -
> !Args.getLastArgValue(options::OPT_fuse_ld_EQ).equals_lower("lld"))
> +        !Args.getLastArgValue(options::OPT_fuse_ld_EQ)
> +             .equals_insensitive("lld"))
>        Diag(clang::diag::err_drv_lto_without_lld);
>    }
>
> @@ -5346,7 +5347,7 @@ const ToolChain &Driver::getToolChain(const ArgList
> &Args,
>        case llvm::Triple::MSVC:
>        case llvm::Triple::UnknownEnvironment:
>          if (Args.getLastArgValue(options::OPT_fuse_ld_EQ)
> -                .startswith_lower("bfd"))
> +                .startswith_insensitive("bfd"))
>            TC = std::make_unique<toolchains::CrossWindowsToolChain>(
>                *this, Target, Args);
>          else
>
> diff  --git a/clang/lib/Driver/ToolChains/Arch/RISCV.cpp
> b/clang/lib/Driver/ToolChains/Arch/RISCV.cpp
> index c7f2a3ea5e023..f131d5321070c 100644
> --- a/clang/lib/Driver/ToolChains/Arch/RISCV.cpp
> +++ b/clang/lib/Driver/ToolChains/Arch/RISCV.cpp
> @@ -610,17 +610,19 @@ StringRef riscv::getRISCVABI(const ArgList &Args,
> const llvm::Triple &Triple) {
>    // rv64* -> lp64
>    StringRef MArch = getRISCVArch(Args, Triple);
>
> -  if (MArch.startswith_lower("rv32")) {
> +  if (MArch.startswith_insensitive("rv32")) {
>      // FIXME: parse `March` to find `D` extension properly
> -    if (MArch.substr(4).contains_lower("d") ||
> MArch.startswith_lower("rv32g"))
> +    if (MArch.substr(4).contains_insensitive("d") ||
> +        MArch.startswith_insensitive("rv32g"))
>        return "ilp32d";
> -    else if (MArch.startswith_lower("rv32e"))
> +    else if (MArch.startswith_insensitive("rv32e"))
>        return "ilp32e";
>      else
>        return "ilp32";
> -  } else if (MArch.startswith_lower("rv64")) {
> +  } else if (MArch.startswith_insensitive("rv64")) {
>      // FIXME: parse `March` to find `D` extension properly
> -    if (MArch.substr(4).contains_lower("d") ||
> MArch.startswith_lower("rv64g"))
> +    if (MArch.substr(4).contains_insensitive("d") ||
> +        MArch.startswith_insensitive("rv64g"))
>        return "lp64d";
>      else
>        return "lp64";
> @@ -696,11 +698,11 @@ StringRef riscv::getRISCVArch(const
> llvm::opt::ArgList &Args,
>    if (const Arg *A = Args.getLastArg(options::OPT_mabi_EQ)) {
>      StringRef MABI = A->getValue();
>
> -    if (MABI.equals_lower("ilp32e"))
> +    if (MABI.equals_insensitive("ilp32e"))
>        return "rv32e";
> -    else if (MABI.startswith_lower("ilp32"))
> +    else if (MABI.startswith_insensitive("ilp32"))
>        return "rv32imafdc";
> -    else if (MABI.startswith_lower("lp64"))
> +    else if (MABI.startswith_insensitive("lp64"))
>        return "rv64imafdc";
>    }
>
>
> diff  --git a/clang/lib/Driver/ToolChains/Clang.cpp
> b/clang/lib/Driver/ToolChains/Clang.cpp
> index 29b15b516b9e5..f1b5e25525979 100644
> --- a/clang/lib/Driver/ToolChains/Clang.cpp
> +++ b/clang/lib/Driver/ToolChains/Clang.cpp
> @@ -2063,7 +2063,7 @@ static void SetRISCVSmallDataLimit(const ToolChain
> &TC, const ArgList &Args,
>        D.Diag(diag::warn_drv_unsupported_sdata);
>      }
>    } else if (Args.getLastArgValue(options::OPT_mcmodel_EQ)
> -                 .equals_lower("large") &&
> +                 .equals_insensitive("large") &&
>               (Triple.getArch() == llvm::Triple::riscv64)) {
>      // Not support linker relaxation for RV64 with large code model.
>      SmallDataLimit = "0";
> @@ -6331,7 +6331,7 @@ void Clang::ConstructJob(Compilation &C, const
> JobAction &JA,
>    // -finput_charset=UTF-8 is default. Reject others
>    if (Arg *inputCharset =
> Args.getLastArg(options::OPT_finput_charset_EQ)) {
>      StringRef value = inputCharset->getValue();
> -    if (!value.equals_lower("utf-8"))
> +    if (!value.equals_insensitive("utf-8"))
>        D.Diag(diag::err_drv_invalid_value) <<
> inputCharset->getAsString(Args)
>                                            << value;
>    }
> @@ -6339,7 +6339,7 @@ void Clang::ConstructJob(Compilation &C, const
> JobAction &JA,
>    // -fexec_charset=UTF-8 is default. Reject others
>    if (Arg *execCharset = Args.getLastArg(options::OPT_fexec_charset_EQ)) {
>      StringRef value = execCharset->getValue();
> -    if (!value.equals_lower("utf-8"))
> +    if (!value.equals_insensitive("utf-8"))
>        D.Diag(diag::err_drv_invalid_value) <<
> execCharset->getAsString(Args)
>                                            << value;
>    }
> @@ -7266,17 +7266,17 @@ void Clang::AddClangCLArgs(const ArgList &Args,
> types::ID InputType,
>      StringRef GuardArgs = A->getValue();
>      // The only valid options are "cf", "cf,nochecks", "cf-", "ehcont" and
>      // "ehcont-".
> -    if (GuardArgs.equals_lower("cf")) {
> +    if (GuardArgs.equals_insensitive("cf")) {
>        // Emit CFG instrumentation and the table of address-taken
> functions.
>        CmdArgs.push_back("-cfguard");
> -    } else if (GuardArgs.equals_lower("cf,nochecks")) {
> +    } else if (GuardArgs.equals_insensitive("cf,nochecks")) {
>        // Emit only the table of address-taken functions.
>        CmdArgs.push_back("-cfguard-no-checks");
> -    } else if (GuardArgs.equals_lower("ehcont")) {
> +    } else if (GuardArgs.equals_insensitive("ehcont")) {
>        // Emit EH continuation table.
>        CmdArgs.push_back("-ehcontguard");
> -    } else if (GuardArgs.equals_lower("cf-") ||
> -               GuardArgs.equals_lower("ehcont-")) {
> +    } else if (GuardArgs.equals_insensitive("cf-") ||
> +               GuardArgs.equals_insensitive("ehcont-")) {
>        // Do nothing, but we might want to emit a security warning in
> future.
>      } else {
>        D.Diag(diag::err_drv_invalid_value) << A->getSpelling() <<
> GuardArgs;
>
> diff  --git a/clang/lib/Driver/ToolChains/Fuchsia.cpp
> b/clang/lib/Driver/ToolChains/Fuchsia.cpp
> index 502afdc1e30c9..fd9804a7f3532 100644
> --- a/clang/lib/Driver/ToolChains/Fuchsia.cpp
> +++ b/clang/lib/Driver/ToolChains/Fuchsia.cpp
> @@ -54,8 +54,8 @@ void fuchsia::Linker::ConstructJob(Compilation &C, const
> JobAction &JA,
>    CmdArgs.push_back("now");
>
>    const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
> -  if (llvm::sys::path::filename(Exec).equals_lower("ld.lld") ||
> -      llvm::sys::path::stem(Exec).equals_lower("ld.lld")) {
> +  if (llvm::sys::path::filename(Exec).equals_insensitive("ld.lld") ||
> +      llvm::sys::path::stem(Exec).equals_insensitive("ld.lld")) {
>      CmdArgs.push_back("-z");
>      CmdArgs.push_back("rodynamic");
>      CmdArgs.push_back("-z");
>
> diff  --git a/clang/lib/Driver/ToolChains/Gnu.cpp
> b/clang/lib/Driver/ToolChains/Gnu.cpp
> index 517ba60e0b77c..bd5f9c744bba6 100644
> --- a/clang/lib/Driver/ToolChains/Gnu.cpp
> +++ b/clang/lib/Driver/ToolChains/Gnu.cpp
> @@ -51,9 +51,9 @@ static void normalizeCPUNamesForAssembler(const ArgList
> &Args,
>                                            ArgStringList &CmdArgs) {
>    if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
>      StringRef CPUArg(A->getValue());
> -    if (CPUArg.equals_lower("krait"))
> +    if (CPUArg.equals_insensitive("krait"))
>        CmdArgs.push_back("-mcpu=cortex-a15");
> -    else if(CPUArg.equals_lower("kryo"))
> +    else if (CPUArg.equals_insensitive("kryo"))
>        CmdArgs.push_back("-mcpu=cortex-a57");
>      else
>        Args.AddLastArg(CmdArgs, options::OPT_mcpu_EQ);
>
> diff  --git a/clang/lib/Driver/ToolChains/Hexagon.cpp
> b/clang/lib/Driver/ToolChains/Hexagon.cpp
> index e58b666dbfc00..df97da5a20d6d 100644
> --- a/clang/lib/Driver/ToolChains/Hexagon.cpp
> +++ b/clang/lib/Driver/ToolChains/Hexagon.cpp
> @@ -38,7 +38,7 @@ static void handleHVXWarnings(const Driver &D, const
> ArgList &Args) {
>    // Handle the unsupported values passed to mhvx-length.
>    if (Arg *A = Args.getLastArg(options::OPT_mhexagon_hvx_length_EQ)) {
>      StringRef Val = A->getValue();
> -    if (!Val.equals_lower("64b") && !Val.equals_lower("128b"))
> +    if (!Val.equals_insensitive("64b") && !Val.equals_insensitive("128b"))
>        D.Diag(diag::err_drv_unsupported_option_argument)
>            << A->getOption().getName() << Val;
>    }
> @@ -218,8 +218,8 @@ constructHexagonLinkArgs(Compilation &C, const
> JobAction &JA,
>    bool IncDefLibs = !Args.hasArg(options::OPT_nodefaultlibs);
>    bool UseG0 = false;
>    const char *Exec = Args.MakeArgString(HTC.GetLinkerPath());
> -  bool UseLLD = (llvm::sys::path::filename(Exec).equals_lower("ld.lld") ||
> -                 llvm::sys::path::stem(Exec).equals_lower("ld.lld"));
> +  bool UseLLD =
> (llvm::sys::path::filename(Exec).equals_insensitive("ld.lld") ||
> +
>  llvm::sys::path::stem(Exec).equals_insensitive("ld.lld"));
>    bool UseShared = IsShared && !IsStatic;
>    StringRef CpuVer =
> toolchains::HexagonToolChain::GetTargetCPUVersion(Args);
>
>
> diff  --git a/clang/lib/Driver/ToolChains/MSVC.cpp
> b/clang/lib/Driver/ToolChains/MSVC.cpp
> index 98cf0fff49b2a..0dc94a4c6c7dc 100644
> --- a/clang/lib/Driver/ToolChains/MSVC.cpp
> +++ b/clang/lib/Driver/ToolChains/MSVC.cpp
> @@ -181,24 +181,25 @@ findVCToolChainViaEnvironment(llvm::vfs::FileSystem
> &VFS, std::string &Path,
>
>        // whatever/VC/bin --> old toolchain, VC dir is toolchain dir.
>        llvm::StringRef TestPath = PathEntry;
> -      bool IsBin =
> llvm::sys::path::filename(TestPath).equals_lower("bin");
> +      bool IsBin =
> +          llvm::sys::path::filename(TestPath).equals_insensitive("bin");
>        if (!IsBin) {
>          // Strip any architecture subdir like "amd64".
>          TestPath = llvm::sys::path::parent_path(TestPath);
> -        IsBin = llvm::sys::path::filename(TestPath).equals_lower("bin");
> +        IsBin =
> llvm::sys::path::filename(TestPath).equals_insensitive("bin");
>        }
>        if (IsBin) {
>          llvm::StringRef ParentPath =
> llvm::sys::path::parent_path(TestPath);
>          llvm::StringRef ParentFilename =
> llvm::sys::path::filename(ParentPath);
> -        if (ParentFilename.equals_lower("VC")) {
> +        if (ParentFilename.equals_insensitive("VC")) {
>            Path = std::string(ParentPath);
>            VSLayout = MSVCToolChain::ToolsetLayout::OlderVS;
>            return true;
>          }
> -        if (ParentFilename.equals_lower("x86ret") ||
> -            ParentFilename.equals_lower("x86chk") ||
> -            ParentFilename.equals_lower("amd64ret") ||
> -            ParentFilename.equals_lower("amd64chk")) {
> +        if (ParentFilename.equals_insensitive("x86ret") ||
> +            ParentFilename.equals_insensitive("x86chk") ||
> +            ParentFilename.equals_insensitive("amd64ret") ||
> +            ParentFilename.equals_insensitive("amd64chk")) {
>            Path = std::string(ParentPath);
>            VSLayout = MSVCToolChain::ToolsetLayout::DevDivInternal;
>            return true;
> @@ -217,7 +218,7 @@ findVCToolChainViaEnvironment(llvm::vfs::FileSystem
> &VFS, std::string &Path,
>          for (llvm::StringRef Prefix : ExpectedPrefixes) {
>            if (It == End)
>              goto NotAToolChain;
> -          if (!It->startswith_lower(Prefix))
> +          if (!It->startswith_insensitive(Prefix))
>              goto NotAToolChain;
>            ++It;
>          }
> @@ -507,14 +508,15 @@ void visualstudio::Linker::ConstructJob(Compilation
> &C, const JobAction &JA,
>    // Control Flow Guard checks
>    if (Arg *A = Args.getLastArg(options::OPT__SLASH_guard)) {
>      StringRef GuardArgs = A->getValue();
> -    if (GuardArgs.equals_lower("cf") ||
> GuardArgs.equals_lower("cf,nochecks")) {
> +    if (GuardArgs.equals_insensitive("cf") ||
> +        GuardArgs.equals_insensitive("cf,nochecks")) {
>        // MSVC doesn't yet support the "nochecks" modifier.
>        CmdArgs.push_back("-guard:cf");
> -    } else if (GuardArgs.equals_lower("cf-")) {
> +    } else if (GuardArgs.equals_insensitive("cf-")) {
>        CmdArgs.push_back("-guard:cf-");
> -    } else if (GuardArgs.equals_lower("ehcont")) {
> +    } else if (GuardArgs.equals_insensitive("ehcont")) {
>        CmdArgs.push_back("-guard:ehcont");
> -    } else if (GuardArgs.equals_lower("ehcont-")) {
> +    } else if (GuardArgs.equals_insensitive("ehcont-")) {
>        CmdArgs.push_back("-guard:ehcont-");
>      }
>    }
> @@ -584,10 +586,10 @@ void visualstudio::Linker::ConstructJob(Compilation
> &C, const JobAction &JA,
>      = Args.getLastArgValue(options::OPT_fuse_ld_EQ, CLANG_DEFAULT_LINKER);
>    if (Linker.empty())
>      Linker = "link";
> -  if (Linker.equals_lower("lld"))
> +  if (Linker.equals_insensitive("lld"))
>      Linker = "lld-link";
>
> -  if (Linker.equals_lower("link")) {
> +  if (Linker.equals_insensitive("link")) {
>      // If we're using the MSVC linker, it's not sufficient to just use
> link
>      // from the program PATH, because other environments like GnuWin32
> install
>      // their own link.exe which may come first.
> @@ -646,7 +648,7 @@ void visualstudio::Linker::ConstructJob(Compilation
> &C, const JobAction &JA,
>        // find it.
>        for (const char *Cursor = EnvBlock.data(); *Cursor != '\0';) {
>          llvm::StringRef EnvVar(Cursor);
> -        if (EnvVar.startswith_lower("path=")) {
> +        if (EnvVar.startswith_insensitive("path=")) {
>            using SubDirectoryType =
> toolchains::MSVCToolChain::SubDirectoryType;
>            constexpr size_t PrefixLen = 5; // strlen("path=")
>            Environment.push_back(Args.MakeArgString(
>
> diff  --git a/clang/lib/Driver/ToolChains/MinGW.cpp
> b/clang/lib/Driver/ToolChains/MinGW.cpp
> index 4ebcdf6a94455..467a5479bfb74 100644
> --- a/clang/lib/Driver/ToolChains/MinGW.cpp
> +++ b/clang/lib/Driver/ToolChains/MinGW.cpp
> @@ -427,7 +427,7 @@ toolchains::MinGW::MinGW(const Driver &D, const
> llvm::Triple &Triple,
>
>    NativeLLVMSupport =
>        Args.getLastArgValue(options::OPT_fuse_ld_EQ, CLANG_DEFAULT_LINKER)
> -          .equals_lower("lld");
> +          .equals_insensitive("lld");
>  }
>
>  bool toolchains::MinGW::IsIntegratedAssemblerDefault() const { return
> true; }
>
> diff  --git a/clang/lib/Format/Format.cpp b/clang/lib/Format/Format.cpp
> index 71b7820c2b1c6..e95ec55d0805d 100644
> --- a/clang/lib/Format/Format.cpp
> +++ b/clang/lib/Format/Format.cpp
> @@ -1441,23 +1441,23 @@ FormatStyle getNoStyle() {
>
>  bool getPredefinedStyle(StringRef Name, FormatStyle::LanguageKind
> Language,
>                          FormatStyle *Style) {
> -  if (Name.equals_lower("llvm")) {
> +  if (Name.equals_insensitive("llvm")) {
>      *Style = getLLVMStyle(Language);
> -  } else if (Name.equals_lower("chromium")) {
> +  } else if (Name.equals_insensitive("chromium")) {
>      *Style = getChromiumStyle(Language);
> -  } else if (Name.equals_lower("mozilla")) {
> +  } else if (Name.equals_insensitive("mozilla")) {
>      *Style = getMozillaStyle();
> -  } else if (Name.equals_lower("google")) {
> +  } else if (Name.equals_insensitive("google")) {
>      *Style = getGoogleStyle(Language);
> -  } else if (Name.equals_lower("webkit")) {
> +  } else if (Name.equals_insensitive("webkit")) {
>      *Style = getWebKitStyle();
> -  } else if (Name.equals_lower("gnu")) {
> +  } else if (Name.equals_insensitive("gnu")) {
>      *Style = getGNUStyle();
> -  } else if (Name.equals_lower("microsoft")) {
> +  } else if (Name.equals_insensitive("microsoft")) {
>      *Style = getMicrosoftStyle(Language);
> -  } else if (Name.equals_lower("none")) {
> +  } else if (Name.equals_insensitive("none")) {
>      *Style = getNoStyle();
> -  } else if (Name.equals_lower("inheritparentconfig")) {
> +  } else if (Name.equals_insensitive("inheritparentconfig")) {
>      Style->InheritsParentConfig = true;
>    } else {
>      return false;
> @@ -2973,22 +2973,23 @@ const char *StyleOptionHelpDescription =
>  static FormatStyle::LanguageKind getLanguageByFileName(StringRef
> FileName) {
>    if (FileName.endswith(".java"))
>      return FormatStyle::LK_Java;
> -  if (FileName.endswith_lower(".js") || FileName.endswith_lower(".mjs") ||
> -      FileName.endswith_lower(".ts"))
> +  if (FileName.endswith_insensitive(".js") ||
> +      FileName.endswith_insensitive(".mjs") ||
> +      FileName.endswith_insensitive(".ts"))
>      return FormatStyle::LK_JavaScript; // (module) JavaScript or
> TypeScript.
>    if (FileName.endswith(".m") || FileName.endswith(".mm"))
>      return FormatStyle::LK_ObjC;
> -  if (FileName.endswith_lower(".proto") ||
> -      FileName.endswith_lower(".protodevel"))
> +  if (FileName.endswith_insensitive(".proto") ||
> +      FileName.endswith_insensitive(".protodevel"))
>      return FormatStyle::LK_Proto;
> -  if (FileName.endswith_lower(".textpb") ||
> -      FileName.endswith_lower(".pb.txt") ||
> -      FileName.endswith_lower(".textproto") ||
> -      FileName.endswith_lower(".asciipb"))
> +  if (FileName.endswith_insensitive(".textpb") ||
> +      FileName.endswith_insensitive(".pb.txt") ||
> +      FileName.endswith_insensitive(".textproto") ||
> +      FileName.endswith_insensitive(".asciipb"))
>      return FormatStyle::LK_TextProto;
> -  if (FileName.endswith_lower(".td"))
> +  if (FileName.endswith_insensitive(".td"))
>      return FormatStyle::LK_TableGen;
> -  if (FileName.endswith_lower(".cs"))
> +  if (FileName.endswith_insensitive(".cs"))
>      return FormatStyle::LK_CSharp;
>    return FormatStyle::LK_Cpp;
>  }
> @@ -3048,7 +3049,7 @@ llvm::Expected<FormatStyle> getStyle(StringRef
> StyleName, StringRef FileName,
>    // If the style inherits the parent configuration it is a command line
>    // configuration, which wants to inherit, so we have to skip the check
> of the
>    // StyleName.
> -  if (!Style.InheritsParentConfig && !StyleName.equals_lower("file")) {
> +  if (!Style.InheritsParentConfig &&
> !StyleName.equals_insensitive("file")) {
>      if (!getPredefinedStyle(StyleName, Style.Language, &Style))
>        return make_string_error("Invalid value for -style");
>      if (!Style.InheritsParentConfig)
>
> diff  --git a/clang/lib/Format/SortJavaScriptImports.cpp
> b/clang/lib/Format/SortJavaScriptImports.cpp
> index 901204c297f9d..a5e3ce69207bd 100644
> --- a/clang/lib/Format/SortJavaScriptImports.cpp
> +++ b/clang/lib/Format/SortJavaScriptImports.cpp
> @@ -113,7 +113,7 @@ bool operator<(const JsModuleReference &LHS, const
> JsModuleReference &RHS) {
>    // Empty URLs sort *last* (for export {...};).
>    if (LHS.URL.empty() != RHS.URL.empty())
>      return LHS.URL.empty() < RHS.URL.empty();
> -  if (int Res = LHS.URL.compare_lower(RHS.URL))
> +  if (int Res = LHS.URL.compare_insensitive(RHS.URL))
>      return Res < 0;
>    // '*' imports (with prefix) sort before {a, b, ...} imports.
>    if (LHS.Prefix.empty() != RHS.Prefix.empty())
> @@ -327,7 +327,7 @@ class JavaScriptImportSorter : public TokenAnalyzer {
>      SmallVector<JsImportedSymbol, 1> Symbols = Reference.Symbols;
>      llvm::stable_sort(
>          Symbols, [&](const JsImportedSymbol &LHS, const JsImportedSymbol
> &RHS) {
> -          return LHS.Symbol.compare_lower(RHS.Symbol) < 0;
> +          return LHS.Symbol.compare_insensitive(RHS.Symbol) < 0;
>          });
>      if (!Reference.SymbolsMerged && Symbols == Reference.Symbols) {
>        // Symbols didn't change, just emit the entire module reference.
>
> diff  --git a/clang/lib/Format/UsingDeclarationsSorter.cpp
> b/clang/lib/Format/UsingDeclarationsSorter.cpp
> index b6559db61d0cb..5608a5a759537 100644
> --- a/clang/lib/Format/UsingDeclarationsSorter.cpp
> +++ b/clang/lib/Format/UsingDeclarationsSorter.cpp
> @@ -48,7 +48,7 @@ int compareLabels(StringRef A, StringRef B) {
>          return -1;
>
>        // Two names within a group compare case-insensitively.
> -      return NamesA[I].compare_lower(NamesB[I]);
> +      return NamesA[I].compare_insensitive(NamesB[I]);
>      }
>
>      // I is the last index of NamesB and NamesB[I] is a non-namespace
> name.
> @@ -57,7 +57,7 @@ int compareLabels(StringRef A, StringRef B) {
>        return 1;
>
>      // Two namespaces names within a group compare case-insensitively.
> -    int C = NamesA[I].compare_lower(NamesB[I]);
> +    int C = NamesA[I].compare_insensitive(NamesB[I]);
>      if (C != 0)
>        return C;
>    }
>
> diff  --git a/clang/lib/Frontend/CompilerInvocation.cpp
> b/clang/lib/Frontend/CompilerInvocation.cpp
> index c1b7b027b3b4d..126e9c7a9cd5e 100644
> --- a/clang/lib/Frontend/CompilerInvocation.cpp
> +++ b/clang/lib/Frontend/CompilerInvocation.cpp
> @@ -3986,13 +3986,13 @@ bool CompilerInvocation::ParseLangArgs(LangOptions
> &Opts, ArgList &Args,
>    if (Arg *A = Args.getLastArg(OPT_msign_return_address_EQ)) {
>      StringRef SignScope = A->getValue();
>
> -    if (SignScope.equals_lower("none"))
> +    if (SignScope.equals_insensitive("none"))
>        Opts.setSignReturnAddressScope(
>            LangOptions::SignReturnAddressScopeKind::None);
> -    else if (SignScope.equals_lower("all"))
> +    else if (SignScope.equals_insensitive("all"))
>        Opts.setSignReturnAddressScope(
>            LangOptions::SignReturnAddressScopeKind::All);
> -    else if (SignScope.equals_lower("non-leaf"))
> +    else if (SignScope.equals_insensitive("non-leaf"))
>        Opts.setSignReturnAddressScope(
>            LangOptions::SignReturnAddressScopeKind::NonLeaf);
>      else
> @@ -4002,10 +4002,10 @@ bool CompilerInvocation::ParseLangArgs(LangOptions
> &Opts, ArgList &Args,
>      if (Arg *A = Args.getLastArg(OPT_msign_return_address_key_EQ)) {
>        StringRef SignKey = A->getValue();
>        if (!SignScope.empty() && !SignKey.empty()) {
> -        if (SignKey.equals_lower("a_key"))
> +        if (SignKey.equals_insensitive("a_key"))
>            Opts.setSignReturnAddressKey(
>                LangOptions::SignReturnAddressKeyKind::AKey);
> -        else if (SignKey.equals_lower("b_key"))
> +        else if (SignKey.equals_insensitive("b_key"))
>            Opts.setSignReturnAddressKey(
>                LangOptions::SignReturnAddressKeyKind::BKey);
>          else
>
> diff  --git a/clang/lib/Lex/HeaderMap.cpp b/clang/lib/Lex/HeaderMap.cpp
> index 4b60cfa7b52dd..ae5e6b221953f 100644
> --- a/clang/lib/Lex/HeaderMap.cpp
> +++ b/clang/lib/Lex/HeaderMap.cpp
> @@ -224,7 +224,7 @@ StringRef HeaderMapImpl::lookupFilename(StringRef
> Filename,
>      Optional<StringRef> Key = getString(B.Key);
>      if (LLVM_UNLIKELY(!Key))
>        continue;
> -    if (!Filename.equals_lower(*Key))
> +    if (!Filename.equals_insensitive(*Key))
>        continue;
>
>      // If so, we have a match in the hash table.  Construct the
> destination
>
> diff  --git a/clang/lib/Lex/PPDirectives.cpp
> b/clang/lib/Lex/PPDirectives.cpp
> index 87741b0a024a2..d0e4962a37479 100644
> --- a/clang/lib/Lex/PPDirectives.cpp
> +++ b/clang/lib/Lex/PPDirectives.cpp
> @@ -196,7 +196,7 @@ static MacroDiag shouldWarnOnMacroUndef(Preprocessor
> &PP, IdentifierInfo *II) {
>  static bool warnByDefaultOnWrongCase(StringRef Include) {
>    // If the first component of the path is "boost", treat this like a
> standard header
>    // for the purposes of diagnostics.
> -  if (::llvm::sys::path::begin(Include)->equals_lower("boost"))
> +  if (::llvm::sys::path::begin(Include)->equals_insensitive("boost"))
>      return true;
>
>    // "condition_variable" is the longest standard header name at 18
> characters.
> @@ -1723,7 +1723,8 @@ static bool
> trySimplifyPath(SmallVectorImpl<StringRef> &Components,
>          // If these path components
> diff er by more than just case, then we
>          // may be looking at symlinked paths. Bail on this diagnostic to
> avoid
>          // noisy false positives.
> -        SuggestReplacement =
> RealPathComponentIter->equals_lower(Component);
> +        SuggestReplacement =
> +            RealPathComponentIter->equals_insensitive(Component);
>          if (!SuggestReplacement)
>            break;
>          Component = *RealPathComponentIter;
>
> diff  --git a/clang/lib/Lex/PPMacroExpansion.cpp
> b/clang/lib/Lex/PPMacroExpansion.cpp
> index 74ef9df592dbe..8728ac9e2166e 100644
> --- a/clang/lib/Lex/PPMacroExpansion.cpp
> +++ b/clang/lib/Lex/PPMacroExpansion.cpp
> @@ -1430,7 +1430,7 @@ static bool isTargetVendor(const TargetInfo &TI,
> const IdentifierInfo *II) {
>    StringRef VendorName = TI.getTriple().getVendorName();
>    if (VendorName.empty())
>      VendorName = "unknown";
> -  return VendorName.equals_lower(II->getName());
> +  return VendorName.equals_insensitive(II->getName());
>  }
>
>  /// Implements the __is_target_os builtin macro.
>
> diff  --git a/clang/lib/Sema/CodeCompleteConsumer.cpp
> b/clang/lib/Sema/CodeCompleteConsumer.cpp
> index 678a09ba10034..3ab2a18f5e8d5 100644
> --- a/clang/lib/Sema/CodeCompleteConsumer.cpp
> +++ b/clang/lib/Sema/CodeCompleteConsumer.cpp
> @@ -755,7 +755,7 @@ bool clang::operator<(const CodeCompletionResult &X,
>    std::string XSaved, YSaved;
>    StringRef XStr = X.getOrderedName(XSaved);
>    StringRef YStr = Y.getOrderedName(YSaved);
> -  int cmp = XStr.compare_lower(YStr);
> +  int cmp = XStr.compare_insensitive(YStr);
>    if (cmp)
>      return cmp < 0;
>
>
> diff  --git a/clang/lib/Sema/SemaChecking.cpp
> b/clang/lib/Sema/SemaChecking.cpp
> index 3b95a1344075a..561c83eddce2f 100644
> --- a/clang/lib/Sema/SemaChecking.cpp
> +++ b/clang/lib/Sema/SemaChecking.cpp
> @@ -6971,18 +6971,18 @@ bool Sema::SemaBuiltinARMSpecialReg(unsigned
> BuiltinID, CallExpr *TheCall,
>
>      bool ValidString = true;
>      if (IsARMBuiltin) {
> -      ValidString &= Fields[0].startswith_lower("cp") ||
> -                     Fields[0].startswith_lower("p");
> +      ValidString &= Fields[0].startswith_insensitive("cp") ||
> +                     Fields[0].startswith_insensitive("p");
>        if (ValidString)
> -        Fields[0] =
> -          Fields[0].drop_front(Fields[0].startswith_lower("cp") ? 2 : 1);
> +        Fields[0] = Fields[0].drop_front(
> +            Fields[0].startswith_insensitive("cp") ? 2 : 1);
>
> -      ValidString &= Fields[2].startswith_lower("c");
> +      ValidString &= Fields[2].startswith_insensitive("c");
>        if (ValidString)
>          Fields[2] = Fields[2].drop_front(1);
>
>        if (FiveFields) {
> -        ValidString &= Fields[3].startswith_lower("c");
> +        ValidString &= Fields[3].startswith_insensitive("c");
>          if (ValidString)
>            Fields[3] = Fields[3].drop_front(1);
>        }
>
> diff  --git a/clang/lib/Sema/SemaCodeComplete.cpp
> b/clang/lib/Sema/SemaCodeComplete.cpp
> index 1ab9c50709a9d..e03b671ae61e7 100644
> --- a/clang/lib/Sema/SemaCodeComplete.cpp
> +++ b/clang/lib/Sema/SemaCodeComplete.cpp
> @@ -9491,10 +9491,10 @@ void
> Sema::CodeCompleteIncludedFile(llvm::StringRef Dir, bool Angled) {
>          // Only files that really look like headers. (Except in system
> dirs).
>          if (!IsSystem) {
>            // Header extensions from Types.def, which we can't depend on
> here.
> -          if (!(Filename.endswith_lower(".h") ||
> -                Filename.endswith_lower(".hh") ||
> -                Filename.endswith_lower(".hpp") ||
> -                Filename.endswith_lower(".inc")))
> +          if (!(Filename.endswith_insensitive(".h") ||
> +                Filename.endswith_insensitive(".hh") ||
> +                Filename.endswith_insensitive(".hpp") ||
> +                Filename.endswith_insensitive(".inc")))
>              break;
>          }
>          AddCompletion(Filename, /*IsDirectory=*/false);
>
> diff  --git a/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
> b/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
> index 4e49dbc2facce..69b90be9aa7e6 100644
> --- a/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
> +++ b/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
> @@ -2039,7 +2039,7 @@ void CStringChecker::evalStrcmpCommon(CheckerContext
> &C, const CallExpr *CE,
>          RightStrRef = RightStrRef.substr(0, s2Term);
>
>        // Use StringRef's comparison methods to compute the actual result.
> -      int compareRes = IgnoreCase ? LeftStrRef.compare_lower(RightStrRef)
> +      int compareRes = IgnoreCase ?
> LeftStrRef.compare_insensitive(RightStrRef)
>                                    : LeftStrRef.compare(RightStrRef);
>
>        // The strcmp function returns an integer greater than, equal to,
> or less
>
> diff  --git a/clang/lib/StaticAnalyzer/Checkers/ContainerModeling.cpp
> b/clang/lib/StaticAnalyzer/Checkers/ContainerModeling.cpp
> index 73c6517fd0ebf..1a7f0d5ab74c2 100644
> --- a/clang/lib/StaticAnalyzer/Checkers/ContainerModeling.cpp
> +++ b/clang/lib/StaticAnalyzer/Checkers/ContainerModeling.cpp
> @@ -763,14 +763,14 @@ bool isBeginCall(const FunctionDecl *Func) {
>    const auto *IdInfo = Func->getIdentifier();
>    if (!IdInfo)
>      return false;
> -  return IdInfo->getName().endswith_lower("begin");
> +  return IdInfo->getName().endswith_insensitive("begin");
>  }
>
>  bool isEndCall(const FunctionDecl *Func) {
>    const auto *IdInfo = Func->getIdentifier();
>    if (!IdInfo)
>      return false;
> -  return IdInfo->getName().endswith_lower("end");
> +  return IdInfo->getName().endswith_insensitive("end");
>  }
>
>  const CXXRecordDecl *getCXXRecordDecl(ProgramStateRef State,
>
> diff  --git a/clang/lib/StaticAnalyzer/Checkers/GCDAntipatternChecker.cpp
> b/clang/lib/StaticAnalyzer/Checkers/GCDAntipatternChecker.cpp
> index 63fbe75fd4983..8e02ef74c6686 100644
> --- a/clang/lib/StaticAnalyzer/Checkers/GCDAntipatternChecker.cpp
> +++ b/clang/lib/StaticAnalyzer/Checkers/GCDAntipatternChecker.cpp
> @@ -80,7 +80,7 @@ static bool isTest(const Decl *D) {
>      if (const auto *CD = dyn_cast<ObjCContainerDecl>(OD->getParent())) {
>        std::string ContainerName = CD->getNameAsString();
>        StringRef CN(ContainerName);
> -      if (CN.contains_lower("test") || CN.contains_lower("mock"))
> +      if (CN.contains_insensitive("test") ||
> CN.contains_insensitive("mock"))
>          return true;
>      }
>    }
>
> diff  --git a/clang/lib/StaticAnalyzer/Checkers/Iterator.cpp
> b/clang/lib/StaticAnalyzer/Checkers/Iterator.cpp
> index ac0f24603dd90..4961901499914 100644
> --- a/clang/lib/StaticAnalyzer/Checkers/Iterator.cpp
> +++ b/clang/lib/StaticAnalyzer/Checkers/Iterator.cpp
> @@ -29,8 +29,8 @@ bool isIterator(const CXXRecordDecl *CRD) {
>      return false;
>
>    const auto Name = CRD->getName();
> -  if (!(Name.endswith_lower("iterator") || Name.endswith_lower("iter") ||
> -        Name.endswith_lower("it")))
> +  if (!(Name.endswith_insensitive("iterator") ||
> +        Name.endswith_insensitive("iter") ||
> Name.endswith_insensitive("it")))
>      return false;
>
>    bool HasCopyCtor = false, HasCopyAssign = true, HasDtor = false,
>
> diff  --git a/clang/lib/StaticAnalyzer/Checkers/MallocChecker.cpp
> b/clang/lib/StaticAnalyzer/Checkers/MallocChecker.cpp
> index e0f0dc35e7a71..a6470da09c458 100644
> --- a/clang/lib/StaticAnalyzer/Checkers/MallocChecker.cpp
> +++ b/clang/lib/StaticAnalyzer/Checkers/MallocChecker.cpp
> @@ -3145,9 +3145,10 @@ static SymbolRef
> findFailedReallocSymbol(ProgramStateRef currState,
>  static bool isReferenceCountingPointerDestructor(const CXXDestructorDecl
> *DD) {
>    if (const IdentifierInfo *II = DD->getParent()->getIdentifier()) {
>      StringRef N = II->getName();
> -    if (N.contains_lower("ptr") || N.contains_lower("pointer")) {
> -      if (N.contains_lower("ref") || N.contains_lower("cnt") ||
> -          N.contains_lower("intrusive") || N.contains_lower("shared")) {
> +    if (N.contains_insensitive("ptr") ||
> N.contains_insensitive("pointer")) {
> +      if (N.contains_insensitive("ref") || N.contains_insensitive("cnt")
> ||
> +          N.contains_insensitive("intrusive") ||
> +          N.contains_insensitive("shared")) {
>          return true;
>        }
>      }
>
> diff  --git a/clang/lib/Tooling/Inclusions/HeaderIncludes.cpp
> b/clang/lib/Tooling/Inclusions/HeaderIncludes.cpp
> index d1f984632660f..fbceb26c39c7c 100644
> --- a/clang/lib/Tooling/Inclusions/HeaderIncludes.cpp
> +++ b/clang/lib/Tooling/Inclusions/HeaderIncludes.cpp
> @@ -252,9 +252,9 @@ bool IncludeCategoryManager::isMainHeader(StringRef
> IncludeName) const {
>    //  1) foo.h => bar.cc
>    //  2) foo.proto.h => foo.cc
>    StringRef Matching;
> -  if (MatchingFileStem.startswith_lower(HeaderStem))
> +  if (MatchingFileStem.startswith_insensitive(HeaderStem))
>      Matching = MatchingFileStem; // example 1), 2)
> -  else if (FileStem.equals_lower(HeaderStem))
> +  else if (FileStem.equals_insensitive(HeaderStem))
>      Matching = FileStem; // example 3)
>    if (!Matching.empty()) {
>      llvm::Regex MainIncludeRegex(HeaderStem.str() +
> Style.IncludeIsMainRegex,
>
> diff  --git a/clang/lib/Tooling/InterpolatingCompilationDatabase.cpp
> b/clang/lib/Tooling/InterpolatingCompilationDatabase.cpp
> index 3b65504b98ea3..650e510fb68ff 100644
> --- a/clang/lib/Tooling/InterpolatingCompilationDatabase.cpp
> +++ b/clang/lib/Tooling/InterpolatingCompilationDatabase.cpp
> @@ -256,7 +256,7 @@ struct TransferableCommand {
>
>      // Otherwise just check the clang executable file name.
>      return !CmdLine.empty() &&
> -           llvm::sys::path::stem(CmdLine.front()).endswith_lower("cl");
> +
>  llvm::sys::path::stem(CmdLine.front()).endswith_insensitive("cl");
>    }
>
>    // Map the language from the --std flag to that of the -x flag.
>
> diff  --git a/clang/tools/clang-refactor/TestSupport.cpp
> b/clang/tools/clang-refactor/TestSupport.cpp
> index 34499b93c97ea..eb880889749f5 100644
> --- a/clang/tools/clang-refactor/TestSupport.cpp
> +++ b/clang/tools/clang-refactor/TestSupport.cpp
> @@ -328,8 +328,8 @@ findTestSelectionRanges(StringRef Filename) {
>      // Try to detect mistyped 'range:' comments to ensure tests don't miss
>      // anything.
>      auto DetectMistypedCommand = [&]() -> bool {
> -      if (Comment.contains_lower("range") && Comment.contains("=") &&
> -          !Comment.contains_lower("run") && !Comment.contains("CHECK")) {
> +      if (Comment.contains_insensitive("range") && Comment.contains("=")
> &&
> +          !Comment.contains_insensitive("run") &&
> !Comment.contains("CHECK")) {
>          llvm::errs() << "error: suspicious comment '" << Comment
>                       << "' that "
>                          "resembles the range command found\n";
>
> diff  --git a/clang/tools/clang-scan-deps/ClangScanDeps.cpp
> b/clang/tools/clang-scan-deps/ClangScanDeps.cpp
> index 49c4757686623..b6533361c5296 100644
> --- a/clang/tools/clang-scan-deps/ClangScanDeps.cpp
> +++ b/clang/tools/clang-scan-deps/ClangScanDeps.cpp
> @@ -465,7 +465,7 @@ int main(int argc, const char **argv) {
>          auto FlagsEnd = llvm::find(Args, "--");
>          if (FlagsEnd != Args.begin()) {
>            ClangCLMode =
> -              llvm::sys::path::stem(Args[0]).contains_lower("clang-cl") ||
> +
> llvm::sys::path::stem(Args[0]).contains_insensitive("clang-cl") ||
>                llvm::is_contained(Args, "--driver-mode=cl");
>
>            // Reverse scan, starting at the end or at the element before
> "--".
>
> diff  --git a/clang/tools/driver/driver.cpp b/clang/tools/driver/driver.cpp
> index ee3ffe3012d1e..9e3f51db21a9d 100644
> --- a/clang/tools/driver/driver.cpp
> +++ b/clang/tools/driver/driver.cpp
> @@ -273,7 +273,7 @@ static void
> FixupDiagPrefixExeName(TextDiagnosticPrinter *DiagClient,
>    // If the clang binary happens to be named cl.exe for compatibility
> reasons,
>    // use clang-cl.exe as the prefix to avoid confusion between clang and
> MSVC.
>    StringRef ExeBasename(llvm::sys::path::stem(Path));
> -  if (ExeBasename.equals_lower("cl"))
> +  if (ExeBasename.equals_insensitive("cl"))
>      ExeBasename = "clang-cl";
>    DiagClient->setPrefix(std::string(ExeBasename));
>  }
>
> diff  --git a/clang/tools/libclang/CIndexCodeCompletion.cpp
> b/clang/tools/libclang/CIndexCodeCompletion.cpp
> index 6685c892749ea..68f35c41efd74 100644
> --- a/clang/tools/libclang/CIndexCodeCompletion.cpp
> +++ b/clang/tools/libclang/CIndexCodeCompletion.cpp
> @@ -1026,7 +1026,7 @@ namespace {
>        if (XText.empty() || YText.empty())
>          return !XText.empty();
>
> -      int result = XText.compare_lower(YText);
> +      int result = XText.compare_insensitive(YText);
>        if (result < 0)
>          return true;
>        if (result > 0)
>
> diff  --git a/clang/unittests/Tooling/CompilationDatabaseTest.cpp
> b/clang/unittests/Tooling/CompilationDatabaseTest.cpp
> index 8ff3387d3c185..9a04de32c852d 100644
> --- a/clang/unittests/Tooling/CompilationDatabaseTest.cpp
> +++ b/clang/unittests/Tooling/CompilationDatabaseTest.cpp
> @@ -210,7 +210,7 @@ TEST(JSONCompilationDatabase,
> ArgumentsPreferredOverCommand) {
>  struct FakeComparator : public PathComparator {
>    ~FakeComparator() override {}
>    bool equivalent(StringRef FileA, StringRef FileB) const override {
> -    return FileA.equals_lower(FileB);
> +    return FileA.equals_insensitive(FileB);
>    }
>  };
>
>
>
>
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