[NFC][TargetParser] Remove llvm/Support/AArch64TargetParser.h

[lenary]

Summary

Removes the forwarding header llvm/Support/AArch64TargetParser.h.

I am proposing to do this for all the forwarding headers left after
rGf09cf34d00625e57dea5317a3ac0412c07292148 - for each header:

• Update all relevant in-tree includes
• Remove the forwarding Header

[lenary]

Adding some relevant reviewers.

My plan is to land the other patches like this directly onto main, as they are NFC and a cleanup. I hope this is uncontroversial, but let me know if you think it wouldn't be.

[pratlucas]

LGTM.

[MaskRay]

I don't think it is necessary to deprecate the old header then delete it after 16.0.0 is branched.
llvm/Support/AArch64TargetParser.h has very few open-source out-of-tree uses. Perhaps only ldc driver/targetmachine.cpp uses the header. So it is not worth extra expedience.
Just deleting it in another change should be fine.

Changing the include to #include "llvm/TargetParser/AArch64TargetParser.h" is totally fine, though.

[lenary]

In D140999#4030131, @MaskRay wrote:

I don't think it is necessary to deprecate the old header then delete it after 16.0.0 is branched.
llvm/Support/AArch64TargetParser.h has very few open-source out-of-tree uses. Perhaps only ldc driver/targetmachine.cpp uses the header. So it is not worth extra expedience.
Just deleting it in another change should be fine.

Changing the include to #include "llvm/TargetParser/AArch64TargetParser.h" is totally fine, though.

Sorry, busy time on downstream work means I haven't got back to this.

My plan now is:

• Rebase this to not care about the modulemap patch it is based on, as that is getting no review at all, despite being pinged.
• Just start deleting the forwarding headers, as [NFC] commits, updating all the references to the new headers. We're after the 16 branch point, so I think that's been a long enough cut-over period.

At some point, people will need to fix the bazel/modulemap builds, but I've tried the latter and got no traction on patches to do so.

[lenary]

Most recent diff was to clang-format the patch, which has removed some duplicate includes.

clang/lib/Basic/Targets/AArch64.h

 //
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_CLANG_LIB_BASIC_TARGETS_AARCH64_H
 #define LLVM_CLANG_LIB_BASIC_TARGETS_AARCH64_H
 
 #include "OSTargets.h"
 #include "clang/Basic/TargetBuiltins.h"
-#include "llvm/Support/AArch64TargetParser.h"
+#include "llvm/TargetParser/AArch64TargetParser.h"
 #include <optional>
 
 namespace clang {
 namespace targets {
 
 class LLVM_LIBRARY_VISIBILITY AArch64TargetInfo : public TargetInfo {
   virtual void setDataLayout() = 0;
   static const TargetInfo::GCCRegAlias GCCRegAliases[];

clang/lib/Basic/Targets/AArch64.cpp

 
 #include "AArch64.h"
 #include "clang/Basic/LangOptions.h"
 #include "clang/Basic/TargetBuiltins.h"
 #include "clang/Basic/TargetInfo.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringSwitch.h"
-#include "llvm/Support/AArch64TargetParser.h"
 #include "llvm/Support/ARMTargetParserCommon.h"
 #include "llvm/TargetParser/AArch64TargetParser.h"
 #include <optional>
 
 using namespace clang;
 using namespace clang::targets;
 
 static constexpr Builtin::Info BuiltinInfo[] = {

clang/lib/CodeGen/CGBuiltin.cpp

 #include "llvm/IR/IntrinsicsR600.h"
 #include "llvm/IR/IntrinsicsRISCV.h"
 #include "llvm/IR/IntrinsicsS390.h"
 #include "llvm/IR/IntrinsicsVE.h"
 #include "llvm/IR/IntrinsicsWebAssembly.h"
 #include "llvm/IR/IntrinsicsX86.h"
 #include "llvm/IR/MDBuilder.h"
 #include "llvm/IR/MatrixBuilder.h"
-#include "llvm/Support/AArch64TargetParser.h"
 #include "llvm/Support/ConvertUTF.h"
 #include "llvm/Support/ScopedPrinter.h"
 #include "llvm/Support/X86TargetParser.h"
+#include "llvm/TargetParser/AArch64TargetParser.h"
 #include <optional>
 #include <sstream>
 
 using namespace clang;
 using namespace CodeGen;
 using namespace llvm;
 
 static void initializeAlloca(CodeGenFunction &CGF, AllocaInst *AI, Value *Size,

clang/lib/Driver/SanitizerArgs.cpp

 //===--- SanitizerArgs.cpp - Arguments for sanitizer tools  ---------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 #include "clang/Driver/SanitizerArgs.h"
 #include "ToolChains/CommonArgs.h"
 #include "clang/Basic/Sanitizers.h"
 #include "clang/Driver/Driver.h"
 #include "clang/Driver/DriverDiagnostic.h"
 #include "clang/Driver/Options.h"
 #include "clang/Driver/ToolChain.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringSwitch.h"
-#include "llvm/Support/AArch64TargetParser.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/SpecialCaseList.h"
 #include "llvm/Support/TargetParser.h"
 #include "llvm/Support/VirtualFileSystem.h"
+#include "llvm/TargetParser/AArch64TargetParser.h"
 #include "llvm/Transforms/Instrumentation/AddressSanitizerOptions.h"
 #include <memory>
 
 using namespace clang;
 using namespace clang::driver;
 using namespace llvm::opt;
 
 static const SanitizerMask NeedsUbsanRt =

clang/lib/Driver/ToolChains/Arch/AArch64.cpp

 //===--- AArch64.cpp - AArch64 (not ARM) Helpers for Tools ------*- C++ -*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
 #include "AArch64.h"
 #include "../CommonArgs.h"
 #include "clang/Driver/Driver.h"
 #include "clang/Driver/DriverDiagnostic.h"
 #include "clang/Driver/Options.h"
 #include "llvm/Option/ArgList.h"
-#include "llvm/Support/AArch64TargetParser.h"
-#include "llvm/Support/TargetParser.h"
 #include "llvm/Support/Host.h"
+#include "llvm/Support/TargetParser.h"
+#include "llvm/TargetParser/AArch64TargetParser.h"
 
 using namespace clang::driver;
 using namespace clang::driver::tools;
 using namespace clang;
 using namespace llvm::opt;
 
 /// \returns true if the given triple can determine the default CPU type even
 /// if -arch is not specified.

lldb/source/Plugins/Disassembler/LLVMC/DisassemblerLLVMC.cpp

 #include "llvm/MC/MCDisassembler/MCRelocationInfo.h"
 #include "llvm/MC/MCInst.h"
 #include "llvm/MC/MCInstPrinter.h"
 #include "llvm/MC/MCInstrInfo.h"
 #include "llvm/MC/MCRegisterInfo.h"
 #include "llvm/MC/MCSubtargetInfo.h"
 #include "llvm/MC/MCTargetOptions.h"
 #include "llvm/MC/TargetRegistry.h"
-#include "llvm/Support/AArch64TargetParser.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/ScopedPrinter.h"
 #include "llvm/Support/TargetSelect.h"
+#include "llvm/TargetParser/AArch64TargetParser.h"
 
 #include "lldb/Core/Address.h"
 #include "lldb/Core/Module.h"
 #include "lldb/Symbol/SymbolContext.h"
 #include "lldb/Target/ExecutionContext.h"
 #include "lldb/Target/Process.h"
 #include "lldb/Target/RegisterContext.h"
 #include "lldb/Target/SectionLoadList.h"

llvm/include/llvm/Support/AArch64TargetParser.h

-//===-- llvm/Support/AArch64TargetParser.h ----------------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-///
-/// \file
-/// This header is deprecated in favour of
-/// `llvm/TargetParser/AArch64TargetParser.h`.
-///
-//===----------------------------------------------------------------------===//
-
-#include "llvm/TargetParser/AArch64TargetParser.h"

llvm/lib/Target/AArch64/AArch64Subtarget.cpp

 #include "GISel/AArch64CallLowering.h"
 #include "GISel/AArch64LegalizerInfo.h"
 #include "GISel/AArch64RegisterBankInfo.h"
 #include "MCTargetDesc/AArch64AddressingModes.h"
 #include "llvm/CodeGen/GlobalISel/InstructionSelect.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/CodeGen/MachineScheduler.h"
 #include "llvm/IR/GlobalValue.h"
-#include "llvm/Support/AArch64TargetParser.h"
 #include "llvm/Support/TargetParser.h"
+#include "llvm/TargetParser/AArch64TargetParser.h"
 
 using namespace llvm;
 
 #define DEBUG_TYPE "aarch64-subtarget"
 
 #define GET_SUBTARGETINFO_CTOR
 #define GET_SUBTARGETINFO_TARGET_DESC
 #include "AArch64GenSubtargetInfo.inc"

llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp

 #include "llvm/MC/MCValue.h"
 #include "llvm/MC/SubtargetFeature.h"
 #include "llvm/MC/TargetRegistry.h"
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Support/SMLoc.h"
-#include "llvm/Support/AArch64TargetParser.h"
 #include "llvm/Support/TargetParser.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/TargetParser/AArch64TargetParser.h"
 #include <cassert>
 #include <cctype>
 #include <cstdint>
 #include <cstdio>
 #include <optional>