[SelectionDAG] Add empty implementation of SelectionDAGInfo to some targets (#119968)

#119969 adds a couple of new methods to this class, which will need to
be overridden by these targets.

Part of #119709.

Pull Request: #119968

Author: s-barannikov

llvm/lib/Target/AMDGPU/AMDGPUSelectionDAGInfo.cpp

@@ -0,0 +1,13 @@
+//===----------------------------------------------------------------------===//
+//
+// 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 "AMDGPUSelectionDAGInfo.h"
+
+using namespace llvm;
+
+AMDGPUSelectionDAGInfo::~AMDGPUSelectionDAGInfo() = default;

llvm/lib/Target/AMDGPU/AMDGPUSelectionDAGInfo.h

@@ -0,0 +1,23 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUSELECTIONDAGINFO_H
+#define LLVM_LIB_TARGET_AMDGPU_AMDGPUSELECTIONDAGINFO_H
+
+#include "llvm/CodeGen/SelectionDAGTargetInfo.h"
+
+namespace llvm {
+
+class AMDGPUSelectionDAGInfo : public SelectionDAGTargetInfo {
+public:
+  ~AMDGPUSelectionDAGInfo() override;
+};
+
+} // namespace llvm
+
+#endif // LLVM_LIB_TARGET_AMDGPU_AMDGPUSELECTIONDAGINFO_H

llvm/lib/Target/AMDGPU/CMakeLists.txt

@@ -100,6 +100,7 @@ add_llvm_target(AMDGPUCodeGen
   AMDGPUResourceUsageAnalysis.cpp
   AMDGPURewriteOutArguments.cpp
   AMDGPURewriteUndefForPHI.cpp
+  AMDGPUSelectionDAGInfo.cpp
   AMDGPUSetWavePriority.cpp
   AMDGPUSplitModule.cpp
   AMDGPUSubtarget.cpp

llvm/lib/Target/AMDGPU/GCNSubtarget.cpp

@@ -16,6 +16,7 @@
 #include "AMDGPUInstructionSelector.h"
 #include "AMDGPULegalizerInfo.h"
 #include "AMDGPURegisterBankInfo.h"
+#include "AMDGPUSelectionDAGInfo.h"
 #include "AMDGPUTargetMachine.h"
 #include "SIMachineFunctionInfo.h"
 #include "Utils/AMDGPUBaseInfo.h"
@@ -185,6 +186,9 @@ GCNSubtarget::GCNSubtarget(const Triple &TT, StringRef GPU, StringRef FS,
   // clang-format on
   MaxWavesPerEU = AMDGPU::IsaInfo::getMaxWavesPerEU(this);
   EUsPerCU = AMDGPU::IsaInfo::getEUsPerCU(this);
+
+  TSInfo = std::make_unique<AMDGPUSelectionDAGInfo>();
+
   CallLoweringInfo = std::make_unique<AMDGPUCallLowering>(*getTargetLowering());
   InlineAsmLoweringInfo =
       std::make_unique<InlineAsmLowering>(getTargetLowering());
@@ -194,6 +198,10 @@ GCNSubtarget::GCNSubtarget(const Triple &TT, StringRef GPU, StringRef FS,
       std::make_unique<AMDGPUInstructionSelector>(*this, *RegBankInfo, TM);
 }
 
+const SelectionDAGTargetInfo *GCNSubtarget::getSelectionDAGInfo() const {
+  return TSInfo.get();
+}
+
 unsigned GCNSubtarget::getConstantBusLimit(unsigned Opcode) const {
   if (getGeneration() < GFX10)
     return 1;

llvm/lib/Target/AMDGPU/GCNSubtarget.h

@@ -21,7 +21,6 @@
 #include "SIISelLowering.h"
 #include "SIInstrInfo.h"
 #include "Utils/AMDGPUBaseInfo.h"
-#include "llvm/CodeGen/SelectionDAGTargetInfo.h"
 #include "llvm/Support/ErrorHandling.h"
 
 #define GET_SUBTARGETINFO_HEADER
@@ -49,6 +48,9 @@ class GCNSubtarget final : public AMDGPUGenSubtargetInfo,
   };
 
 private:
+  /// SelectionDAGISel related APIs.
+  std::unique_ptr<const SelectionDAGTargetInfo> TSInfo;
+
   /// GlobalISel related APIs.
   std::unique_ptr<AMDGPUCallLowering> CallLoweringInfo;
   std::unique_ptr<InlineAsmLowering> InlineAsmLoweringInfo;
@@ -257,7 +259,6 @@ class GCNSubtarget final : public AMDGPUGenSubtargetInfo,
   // Dummy feature to use for assembler in tablegen.
   bool FeatureDisable = false;
 
-  SelectionDAGTargetInfo TSInfo;
 private:
   SIInstrInfo InstrInfo;
   SITargetLowering TLInfo;
@@ -291,6 +292,8 @@ class GCNSubtarget final : public AMDGPUGenSubtargetInfo,
     return &InstrInfo.getRegisterInfo();
   }
 
+  const SelectionDAGTargetInfo *getSelectionDAGInfo() const override;
+
   const CallLowering *getCallLowering() const override {
     return CallLoweringInfo.get();
   }
@@ -315,11 +318,6 @@ class GCNSubtarget final : public AMDGPUGenSubtargetInfo,
     return TargetID;
   }
 
-  // Nothing implemented, just prevent crashes on use.
-  const SelectionDAGTargetInfo *getSelectionDAGInfo() const override {
-    return &TSInfo;
-  }
-
   const InstrItineraryData *getInstrItineraryData() const override {
     return &InstrItins;
   }

llvm/lib/Target/AMDGPU/R600Subtarget.cpp

@@ -12,6 +12,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "R600Subtarget.h"
+#include "AMDGPUSelectionDAGInfo.h"
 #include "MCTargetDesc/R600MCTargetDesc.h"
 
 using namespace llvm;
@@ -30,6 +31,13 @@ R600Subtarget::R600Subtarget(const Triple &TT, StringRef GPU, StringRef FS,
       TLInfo(TM, initializeSubtargetDependencies(TT, GPU, FS)),
       InstrItins(getInstrItineraryForCPU(GPU)) {
   LocalMemorySize = AddressableLocalMemorySize;
+  TSInfo = std::make_unique<AMDGPUSelectionDAGInfo>();
+}
+
+R600Subtarget::~R600Subtarget() = default;
+
+const SelectionDAGTargetInfo *R600Subtarget::getSelectionDAGInfo() const {
+  return TSInfo.get();
 }
 
 R600Subtarget &R600Subtarget::initializeSubtargetDependencies(const Triple &TT,

llvm/lib/Target/AMDGPU/R600Subtarget.h

@@ -19,7 +19,6 @@
 #include "R600ISelLowering.h"
 #include "R600InstrInfo.h"
 #include "Utils/AMDGPUBaseInfo.h"
-#include "llvm/CodeGen/SelectionDAGTargetInfo.h"
 
 #define GET_SUBTARGETINFO_HEADER
 #include "R600GenSubtargetInfo.inc"
@@ -41,12 +40,14 @@ class R600Subtarget final : public R600GenSubtargetInfo,
   Generation Gen = R600;
   R600TargetLowering TLInfo;
   InstrItineraryData InstrItins;
-  SelectionDAGTargetInfo TSInfo;
+  std::unique_ptr<const SelectionDAGTargetInfo> TSInfo;
 
 public:
   R600Subtarget(const Triple &TT, StringRef CPU, StringRef FS,
                 const TargetMachine &TM);
 
+  ~R600Subtarget() override;
+
   const R600InstrInfo *getInstrInfo() const override { return &InstrInfo; }
 
   const R600FrameLowering *getFrameLowering() const override {
@@ -65,10 +66,7 @@ class R600Subtarget final : public R600GenSubtargetInfo,
     return &InstrItins;
   }
 
-  // Nothing implemented, just prevent crashes on use.
-  const SelectionDAGTargetInfo *getSelectionDAGInfo() const override {
-    return &TSInfo;
-  }
+  const SelectionDAGTargetInfo *getSelectionDAGInfo() const override;
 
   void ParseSubtargetFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS);
 

llvm/lib/Target/Mips/CMakeLists.txt

@@ -58,6 +58,7 @@ add_llvm_target(MipsCodeGen
   MipsSEISelDAGToDAG.cpp
   MipsSEISelLowering.cpp
   MipsSERegisterInfo.cpp
+  MipsSelectionDAGInfo.cpp
   MipsSubtarget.cpp
   MipsTargetMachine.cpp
   MipsTargetObjectFile.cpp

llvm/lib/Target/Mips/MipsSelectionDAGInfo.cpp

@@ -0,0 +1,13 @@
+//===----------------------------------------------------------------------===//
+//
+// 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 "MipsSelectionDAGInfo.h"
+
+using namespace llvm;
+
+MipsSelectionDAGInfo::~MipsSelectionDAGInfo() = default;

llvm/lib/Target/Mips/MipsSelectionDAGInfo.h

@@ -0,0 +1,23 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_MIPS_MIPSSELECTIONDAGINFO_H
+#define LLVM_LIB_TARGET_MIPS_MIPSSELECTIONDAGINFO_H
+
+#include "llvm/CodeGen/SelectionDAGTargetInfo.h"
+
+namespace llvm {
+
+class MipsSelectionDAGInfo : public SelectionDAGTargetInfo {
+public:
+  ~MipsSelectionDAGInfo() override;
+};
+
+} // namespace llvm
+
+#endif // LLVM_LIB_TARGET_MIPS_MIPSSELECTIONDAGINFO_H