[X86] Move X86ShuffleDecode.cpp/h into MCTargetDesc and remove X86Utils library. NFC

[craig.topper]

Summary

The shuffle decoding is used by X86ISelLowering and
MCTargetDesc/X86InstComments. The latter used to be in a
separate InstPrinter library. The Utils library existed to allow
InstPrinter and CodeGen to share the shuffle decoding. Since
X86InstComments now lives in the MCTargetDesc, which CodeGen
already depends on, we can sink the shuffle decoding there as well.

[craig.topper]

Include the moved files properly.

[RKSimon]

LGTM

llvm/lib/Target/X86/CMakeLists.txt

set(sources
   )
 
 add_llvm_target(X86CodeGen ${sources})
 
 add_subdirectory(AsmParser)
 add_subdirectory(Disassembler)
 add_subdirectory(MCTargetDesc)
 add_subdirectory(TargetInfo)
-add_subdirectory(Utils)

llvm/lib/Target/X86/LLVMBuild.txt

 ;
 ; For more information on the LLVMBuild system, please see:
 ;
 ;   http://llvm.org/docs/LLVMBuild.html
 ;
 ;===------------------------------------------------------------------------===;
 
 [common]
-subdirectories = AsmParser Disassembler MCTargetDesc TargetInfo Utils
+subdirectories = AsmParser Disassembler MCTargetDesc TargetInfo
 
 [component_0]
 type = TargetGroup
 name = X86
 parent = Target
 has_asmparser = 1
 has_asmprinter = 1
 has_disassembler = 1
 has_jit = 1
 
 [component_1]
 type = Library
 name = X86CodeGen
 parent = X86
-required_libraries = Analysis AsmPrinter CodeGen Core MC SelectionDAG Support Target X86Desc X86Info X86Utils GlobalISel ProfileData CFGuard
+required_libraries = Analysis AsmPrinter CodeGen Core MC SelectionDAG Support Target X86Desc X86Info GlobalISel ProfileData CFGuard
 add_to_library_groups = X86

llvm/lib/Target/X86/MCTargetDesc/CMakeLists.txt

 add_llvm_component_library(LLVMX86Desc
   X86ATTInstPrinter.cpp
   X86IntelInstPrinter.cpp
   X86InstComments.cpp
   X86InstPrinterCommon.cpp
+  X86ShuffleDecode.cpp
   X86AsmBackend.cpp
   X86MCTargetDesc.cpp
   X86MCAsmInfo.cpp
   X86MCCodeEmitter.cpp
   X86MachObjectWriter.cpp
   X86ELFObjectWriter.cpp
   X86WinCOFFObjectWriter.cpp
   X86WinCOFFStreamer.cpp
   X86WinCOFFTargetStreamer.cpp
   )

llvm/lib/Target/X86/MCTargetDesc/LLVMBuild.txt

 ;   http://llvm.org/docs/LLVMBuild.html
 ;
 ;===------------------------------------------------------------------------===;
 
 [component_0]
 type = Library
 name = X86Desc
 parent = X86
-required_libraries = MC MCDisassembler Support X86Info X86Utils BinaryFormat
+required_libraries = MC MCDisassembler Support X86Info BinaryFormat
 add_to_library_groups = X86

llvm/lib/Target/X86/MCTargetDesc/X86InstComments.cpp

 // an output stream for -fverbose-asm.
 //
 //===----------------------------------------------------------------------===//
 
 #include "X86InstComments.h"
 #include "X86ATTInstPrinter.h"
 #include "X86BaseInfo.h"
 #include "X86MCTargetDesc.h"
-#include "Utils/X86ShuffleDecode.h"
+#include "X86ShuffleDecode.h"
 #include "llvm/MC/MCInst.h"
 #include "llvm/MC/MCInstrInfo.h"
 #include "llvm/Support/raw_ostream.h"
 
 using namespace llvm;
 
 #define CASE_SSE_INS_COMMON(Inst, src)            \
   case X86::Inst##src:

llvm/lib/Target/X86/Utils/CMakeLists.txt

-add_llvm_component_library(LLVMX86Utils
-  X86ShuffleDecode.cpp
-  )

llvm/lib/Target/X86/Utils/LLVMBuild.txt

-;===- ./lib/Target/X86/Utils/LLVMBuild.txt ---------------------*- Conf -*--===;
-;
-; 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
-;
-;===------------------------------------------------------------------------===;
-;
-; This is an LLVMBuild description file for the components in this subdirectory.
-;
-; For more information on the LLVMBuild system, please see:
-;
-;   http://llvm.org/docs/LLVMBuild.html
-;
-;===------------------------------------------------------------------------===;
-
-[component_0]
-type = Library
-name = X86Utils
-parent = X86
-required_libraries = Support
-add_to_library_groups = X86

llvm/lib/Target/X86/X86ISelLowering.cpp

 //===-- X86ISelLowering.cpp - X86 DAG Lowering Implementation -------------===//
 //
 // 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
 //
 //===----------------------------------------------------------------------===//
 //
 // This file defines the interfaces that X86 uses to lower LLVM code into a
 // selection DAG.
 //
 //===----------------------------------------------------------------------===//
 
 #include "X86ISelLowering.h"
-#include "Utils/X86ShuffleDecode.h"
+#include "MCTargetDesc/X86ShuffleDecode.h"
 #include "X86CallingConv.h"
 #include "X86FrameLowering.h"
 #include "X86InstrBuilder.h"
 #include "X86IntrinsicsInfo.h"
 #include "X86MachineFunctionInfo.h"
 #include "X86TargetMachine.h"
 #include "X86TargetObjectFile.h"
 #include "llvm/ADT/SmallBitVector.h"

llvm/lib/Target/X86/X86MCInstLower.cpp

 //===-- X86MCInstLower.cpp - Convert X86 MachineInstr to an MCInst --------===//
 //
 // 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
 //
 //===----------------------------------------------------------------------===//
 //
 // This file contains code to lower X86 MachineInstrs to their corresponding
 // MCInst records.
 //
 //===----------------------------------------------------------------------===//
 
 #include "MCTargetDesc/X86ATTInstPrinter.h"
 #include "MCTargetDesc/X86BaseInfo.h"
 #include "MCTargetDesc/X86InstComments.h"
+#include "MCTargetDesc/X86ShuffleDecode.h"
 #include "MCTargetDesc/X86TargetStreamer.h"
-#include "Utils/X86ShuffleDecode.h"
 #include "X86AsmPrinter.h"
 #include "X86RegisterInfo.h"
 #include "X86ShuffleDecodeConstantPool.h"
 #include "llvm/ADT/Optional.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/iterator_range.h"
 #include "llvm/CodeGen/MachineConstantPool.h"
 #include "llvm/CodeGen/MachineFunction.h"

llvm/lib/Target/X86/X86ShuffleDecodeConstantPool.cpp

 //===-- X86ShuffleDecodeConstantPool.cpp - X86 shuffle decode -------------===//
 //
 // 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
 //
 //===----------------------------------------------------------------------===//
 //
 // Define several functions to decode x86 specific shuffle semantics using
 // constants from the constant pool.
 //
 //===----------------------------------------------------------------------===//
 
 #include "X86ShuffleDecodeConstantPool.h"
-#include "Utils/X86ShuffleDecode.h"
+#include "MCTargetDesc/X86ShuffleDecode.h"
 #include "llvm/ADT/APInt.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/IR/Constants.h"
 
 //===----------------------------------------------------------------------===//
 //  Vector Mask Decoding
 //===----------------------------------------------------------------------===//