Restore CodeGen/LowLevelType from Support

This is rework of;
  - D30046 (LLT)

Since I have introduced `llvm-min-tblgen` as D146352, `llvm-tblgen`
may depend on `CodeGen`.

`LowLevlType.h` originally belonged to `CodeGen`. Almost all userse are
still under `CodeGen` or `Target`. I think `CodeGen` is the right place
to put `LowLevelType.h`.

`MachineValueType.h` may be moved as well. (later, D149024)

I have made many modules depend on `CodeGen`. It is consistent but
inefficient. It will be split out later, D148769

Besides, I had to isolate MVT and LLT in modmap, since
`llvm::PredicateInfo` clashes between `TableGen/CodeGenSchedule.h`
and `Transforms/Utils/PredicateInfo.h`.
(I think better to introduce namespace llvm::TableGen)

Depends on D145937, D146352, and D148768.

Differential Revision: https://reviews.llvm.org/D148767

clang/lib/CodeGen/CMakeLists.txt

@@ -3,6 +3,7 @@ set(LLVM_LINK_COMPONENTS
   Analysis
   BitReader
   BitWriter
+  CodeGen
   Core
   Coroutines
   Coverage

llvm/include/llvm/CodeGen/GlobalISel/CallLowering.h

@@ -17,13 +17,13 @@
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/CodeGen/CallingConvLower.h"
+#include "llvm/CodeGen/LowLevelType.h"
 #include "llvm/CodeGen/MachineOperand.h"
 #include "llvm/CodeGen/TargetCallingConv.h"
 #include "llvm/IR/CallingConv.h"
 #include "llvm/IR/Type.h"
 #include "llvm/IR/Value.h"
 #include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/LowLevelTypeImpl.h"
 #include "llvm/Support/MachineValueType.h"
 #include <cstdint>
 #include <functional>

llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h

@@ -19,8 +19,8 @@
 
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SmallVector.h"
+#include "llvm/CodeGen/LowLevelType.h"
 #include "llvm/CodeGen/Register.h"
-#include "llvm/Support/LowLevelTypeImpl.h"
 #include "llvm/IR/InstrTypes.h"
 #include <functional>
 

llvm/include/llvm/CodeGen/GlobalISel/InstructionSelector.h

@@ -18,9 +18,9 @@
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/CodeGen/GlobalISel/Utils.h"
+#include "llvm/CodeGen/LowLevelType.h"
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/IR/Function.h"
-#include "llvm/Support/LowLevelTypeImpl.h"
 #include <bitset>
 #include <cstddef>
 #include <cstdint>

llvm/include/llvm/CodeGen/GlobalISel/LegacyLegalizerInfo.h

@@ -16,8 +16,8 @@
 #define LLVM_CODEGEN_GLOBALISEL_LEGACYLEGALIZERINFO_H
 
 #include "llvm/ADT/DenseMap.h"
+#include "llvm/CodeGen/LowLevelType.h"
 #include "llvm/CodeGen/TargetOpcodes.h"
-#include "llvm/Support/LowLevelTypeImpl.h"
 #include <unordered_map>
 
 namespace llvm {

llvm/include/llvm/CodeGen/GlobalISel/LegalizerInfo.h

@@ -17,12 +17,12 @@
 #include "llvm/ADT/SmallBitVector.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/CodeGen/GlobalISel/LegacyLegalizerInfo.h"
+#include "llvm/CodeGen/LowLevelType.h"
 #include "llvm/CodeGen/MachineMemOperand.h"
 #include "llvm/CodeGen/TargetOpcodes.h"
 #include "llvm/MC/MCInstrDesc.h"
 #include "llvm/Support/AtomicOrdering.h"
 #include "llvm/Support/CommandLine.h"
-#include "llvm/Support/LowLevelTypeImpl.h"
 #include <cassert>
 #include <cstdint>
 #include <tuple>

llvm/include/llvm/CodeGen/GlobalISel/Utils.h

@@ -17,11 +17,11 @@
 #include "GISelWorkList.h"
 #include "llvm/ADT/APFloat.h"
 #include "llvm/ADT/StringRef.h"
+#include "llvm/CodeGen/LowLevelType.h"
 #include "llvm/CodeGen/Register.h"
 #include "llvm/IR/DebugLoc.h"
 #include "llvm/Support/Alignment.h"
 #include "llvm/Support/Casting.h"
-#include "llvm/Support/LowLevelTypeImpl.h"
 #include <cstdint>
 
 namespace llvm {

llvm/include/llvm/Support/LowLevelTypeImpl.h → llvm/include/llvm/CodeGen/LowLevelType.h

@@ -1,4 +1,4 @@
-//== llvm/Support/LowLevelTypeImpl.h --------------------------- -*- C++ -*-==//
+//== llvm/CodeGen/LowLevelType.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.
@@ -23,8 +23,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_SUPPORT_LOWLEVELTYPEIMPL_H
-#define LLVM_SUPPORT_LOWLEVELTYPEIMPL_H
+#ifndef LLVM_CODEGEN_LOWLEVELTYPE_H
+#define LLVM_CODEGEN_LOWLEVELTYPE_H
 
 #include "llvm/ADT/DenseMapInfo.h"
 #include "llvm/Support/Debug.h"
@@ -428,4 +428,4 @@ template<> struct DenseMapInfo<LLT> {
 
 }
 
-#endif // LLVM_SUPPORT_LOWLEVELTYPEIMPL_H
+#endif // LLVM_CODEGEN_LOWLEVELTYPE_H

llvm/include/llvm/CodeGen/LowLevelTypeUtils.h

@@ -16,8 +16,8 @@
 #ifndef LLVM_CODEGEN_LOWLEVELTYPEUTILS_H
 #define LLVM_CODEGEN_LOWLEVELTYPEUTILS_H
 
+#include "llvm/CodeGen/LowLevelType.h"
 #include "llvm/CodeGen/ValueTypes.h"
-#include "llvm/Support/LowLevelTypeImpl.h"
 
 namespace llvm {
 

llvm/include/llvm/CodeGen/MachineMemOperand.h

@@ -17,12 +17,12 @@
 
 #include "llvm/ADT/BitmaskEnum.h"
 #include "llvm/ADT/PointerUnion.h"
+#include "llvm/CodeGen/LowLevelType.h"
 #include "llvm/CodeGen/PseudoSourceValue.h"
 #include "llvm/IR/DerivedTypes.h"
 #include "llvm/IR/Value.h" // PointerLikeTypeTraits<Value*>
 #include "llvm/Support/AtomicOrdering.h"
 #include "llvm/Support/DataTypes.h"
-#include "llvm/Support/LowLevelTypeImpl.h"
 
 namespace llvm {
 

llvm/include/llvm/CodeGen/RegisterBankInfo.h

@@ -18,9 +18,9 @@
 #include "llvm/ADT/Hashing.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/iterator_range.h"
+#include "llvm/CodeGen/LowLevelType.h"
 #include "llvm/CodeGen/Register.h"
 #include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/LowLevelTypeImpl.h"
 #include <cassert>
 #include <initializer_list>
 #include <memory>

llvm/include/llvm/module.modulemap

@@ -15,6 +15,14 @@ module LLVM_AsmParser {
   module * { export * }
 }
 
+module LLVM_CodeGenTypes {
+  requires cplusplus
+
+  module LLT {
+    header "CodeGen/LowLevelType.h" export *
+  }
+}
+
 // A module covering CodeGen/ and Target/. These are intertwined
 // and codependent, and thus notionally form a single module.
 module LLVM_Backend {

llvm/lib/CodeGen/CMakeLists.txt

@@ -99,6 +99,7 @@ add_llvm_component_library(LLVMCodeGen
   LLVMTargetMachine.cpp
   LocalStackSlotAllocation.cpp
   LoopTraversal.cpp
+  LowLevelType.cpp
   LowLevelTypeUtils.cpp
   LowerEmuTLS.cpp
   MachineBasicBlock.cpp

llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp

@@ -28,6 +28,7 @@
 #include "llvm/CodeGen/GlobalISel/GISelChangeObserver.h"
 #include "llvm/CodeGen/GlobalISel/InlineAsmLowering.h"
 #include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
+#include "llvm/CodeGen/LowLevelType.h"
 #include "llvm/CodeGen/LowLevelTypeUtils.h"
 #include "llvm/CodeGen/MachineBasicBlock.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
@@ -74,7 +75,6 @@
 #include "llvm/Support/CodeGen.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/LowLevelTypeImpl.h"
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Target/TargetIntrinsicInfo.h"

llvm/lib/CodeGen/GlobalISel/LegalizerInfo.cpp

@@ -13,6 +13,7 @@
 
 #include "llvm/CodeGen/GlobalISel/LegalizerInfo.h"
 #include "llvm/ADT/SmallBitVector.h"
+#include "llvm/CodeGen/LowLevelType.h"
 #include "llvm/CodeGen/MachineInstr.h"
 #include "llvm/CodeGen/MachineOperand.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
@@ -21,7 +22,6 @@
 #include "llvm/MC/MCInstrInfo.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/LowLevelTypeImpl.h"
 #include <algorithm>
 
 using namespace llvm;

llvm/lib/Support/LowLevelType.cpp → llvm/lib/CodeGen/LowLevelType.cpp

@@ -1,4 +1,4 @@
-//===-- llvm/Support/LowLevelType.cpp -------------------------------------===//
+//===-- llvm/CodeGen/LowLevelType.cpp -------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -11,7 +11,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/Support/LowLevelTypeImpl.h"
+#include "llvm/CodeGen/LowLevelType.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 

llvm/lib/CodeGen/MIRParser/MIParser.cpp

@@ -24,6 +24,7 @@
 #include "llvm/Analysis/MemoryLocation.h"
 #include "llvm/AsmParser/Parser.h"
 #include "llvm/AsmParser/SlotMapping.h"
+#include "llvm/CodeGen/LowLevelType.h"
 #include "llvm/CodeGen/MIRFormatter.h"
 #include "llvm/CodeGen/MIRPrinter.h"
 #include "llvm/CodeGen/MachineBasicBlock.h"
@@ -62,7 +63,6 @@
 #include "llvm/Support/BranchProbability.h"
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/LowLevelTypeImpl.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/SMLoc.h"
 #include "llvm/Support/SourceMgr.h"

llvm/lib/CodeGen/MIRPrinter.cpp

@@ -18,6 +18,7 @@
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
+#include "llvm/CodeGen/LowLevelType.h"
 #include "llvm/CodeGen/MIRYamlMapping.h"
 #include "llvm/CodeGen/MachineBasicBlock.h"
 #include "llvm/CodeGen/MachineConstantPool.h"
@@ -47,7 +48,6 @@
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/Format.h"
-#include "llvm/Support/LowLevelTypeImpl.h"
 #include "llvm/Support/YAMLTraits.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Target/TargetMachine.h"

llvm/lib/CodeGen/MachineInstr.cpp

@@ -18,6 +18,7 @@
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/Analysis/AliasAnalysis.h"
 #include "llvm/Analysis/MemoryLocation.h"
+#include "llvm/CodeGen/LowLevelType.h"
 #include "llvm/CodeGen/MachineBasicBlock.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/CodeGen/MachineFunction.h"
@@ -50,7 +51,6 @@
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/FormattedStream.h"
-#include "llvm/Support/LowLevelTypeImpl.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Target/TargetMachine.h"
 #include <algorithm>

llvm/lib/CodeGen/MachineVerifier.cpp

@@ -37,6 +37,7 @@
 #include "llvm/CodeGen/LiveRangeCalc.h"
 #include "llvm/CodeGen/LiveStacks.h"
 #include "llvm/CodeGen/LiveVariables.h"
+#include "llvm/CodeGen/LowLevelType.h"
 #include "llvm/CodeGen/MachineBasicBlock.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/CodeGen/MachineFunction.h"
@@ -71,7 +72,6 @@
 #include "llvm/Pass.h"
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/LowLevelTypeImpl.h"
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Support/ModRef.h"
 #include "llvm/Support/raw_ostream.h"

llvm/lib/Support/CMakeLists.txt

@@ -183,7 +183,6 @@ add_llvm_component_library(LLVMSupport
   LineIterator.cpp
   Locale.cpp
   LockFileManager.cpp
-  LowLevelType.cpp
   ManagedStatic.cpp
   MathExtras.cpp
   MemAlloc.cpp

llvm/lib/Target/AArch64/AsmParser/CMakeLists.txt

@@ -7,6 +7,7 @@ add_llvm_component_library(LLVMAArch64AsmParser
   AArch64Desc
   AArch64Info
   AArch64Utils
+  CodeGen
   MC
   MCParser
   Support

llvm/lib/Target/AArch64/MCTargetDesc/CMakeLists.txt

@@ -16,6 +16,7 @@ add_llvm_component_library(LLVMAArch64Desc
   AArch64Info
   AArch64Utils
   BinaryFormat
+  CodeGen
   MC
   Support
   TargetParser

llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.cpp

@@ -10,8 +10,8 @@
 #include "GCNSubtarget.h"
 #include "llvm/CodeGen/GlobalISel/GISelKnownBits.h"
 #include "llvm/CodeGen/GlobalISel/MIPatternMatch.h"
+#include "llvm/CodeGen/LowLevelType.h"
 #include "llvm/IR/Constants.h"
-#include "llvm/Support/LowLevelTypeImpl.h"
 
 using namespace llvm;
 using namespace MIPatternMatch;

llvm/lib/Target/AMDGPU/AsmParser/CMakeLists.txt

@@ -5,6 +5,7 @@ add_llvm_component_library(LLVMAMDGPUAsmParser
   AMDGPUDesc
   AMDGPUInfo
   AMDGPUUtils
+  CodeGen
   MC
   MCParser
   Support

llvm/lib/Target/AMDGPU/Disassembler/CMakeLists.txt

@@ -7,6 +7,7 @@ add_llvm_component_library(LLVMAMDGPUDisassembler
   AMDGPUDesc
   AMDGPUInfo
   AMDGPUUtils
+  CodeGen
   MC
   MCDisassembler
   Support

llvm/lib/Target/AMDGPU/MCA/CMakeLists.txt

@@ -5,6 +5,7 @@ add_llvm_component_library(LLVMAMDGPUTargetMCA
   AMDGPUDesc
   AMDGPUInfo
   AMDGPUUtils
+  CodeGen
   MC
   MCA
   MCParser

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

@@ -16,6 +16,7 @@ add_llvm_component_library(LLVMAMDGPUDesc
   AMDGPUInfo
   AMDGPUUtils
   BinaryFormat
+  CodeGen
   Core
   MC
   Support

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

@@ -8,6 +8,7 @@ add_llvm_component_library(LLVMAMDGPUUtils
   LINK_COMPONENTS
   Analysis
   BinaryFormat
+  CodeGen
   Core
   MC
   Support

llvm/lib/Target/ARC/Disassembler/CMakeLists.txt

@@ -3,6 +3,7 @@ add_llvm_component_library(LLVMARCDisassembler
 
   LINK_COMPONENTS
   ARCInfo
+  CodeGen
   MCDisassembler
   Support
 

llvm/lib/Target/ARM/ARMCallLowering.cpp

@@ -22,6 +22,7 @@
 #include "llvm/CodeGen/CallingConvLower.h"
 #include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
 #include "llvm/CodeGen/GlobalISel/Utils.h"
+#include "llvm/CodeGen/LowLevelType.h"
 #include "llvm/CodeGen/LowLevelTypeUtils.h"
 #include "llvm/CodeGen/MachineBasicBlock.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
@@ -40,7 +41,6 @@
 #include "llvm/IR/Type.h"
 #include "llvm/IR/Value.h"
 #include "llvm/Support/Casting.h"
-#include "llvm/Support/LowLevelTypeImpl.h"
 #include "llvm/Support/MachineValueType.h"
 #include <algorithm>
 #include <cassert>

llvm/lib/Target/ARM/AsmParser/CMakeLists.txt

@@ -5,6 +5,7 @@ add_llvm_component_library(LLVMARMAsmParser
   ARMDesc
   ARMInfo
   ARMUtils
+  CodeGen
   MC
   MCParser
   Support

llvm/lib/Target/ARM/Disassembler/CMakeLists.txt

@@ -5,6 +5,7 @@ add_llvm_component_library(LLVMARMDisassembler
   ARMDesc
   ARMInfo
   ARMUtils
+  CodeGen
   MC
   MCDisassembler
   Support

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

@@ -18,6 +18,7 @@ add_llvm_component_library(LLVMARMDesc
   ARMInfo
   ARMUtils
   BinaryFormat
+  CodeGen
   MC
   MCDisassembler
   Support