[NFC][clang] Replace raw new/delete with unique_ptr to store ABIInfo in TargetCodeGenInfo

[jasonliu]

Summary

Use unique_ptr to manage the lifetime of ABIInfo member inside TargetCodeGenInfo.

[hubert.reinterpretcast]

clang/lib/CodeGen/TargetInfo.h

51

I'm not sure removing a virtual destructor is a good idea. The use of delete in relation to TargetCodeGenInfo (and derived class) pointers would need to be checked.

[jasonliu]

Provide default virtual destructor.

[hubert.reinterpretcast]

Funny that it's the front-end code that this patch makes more C++11 after so many years. LGTM; thanks.

clang/lib/CodeGen/TargetInfo.h

 class CodeGenFunction;
 class CGBlockInfo;
 class CGFunctionInfo;
 
 /// TargetCodeGenInfo - This class organizes various target-specific
 /// codegeneration issues, like target-specific attributes, builtins and so
 /// on.
 class TargetCodeGenInfo {
-  ABIInfo *Info;
+  std::unique_ptr<ABIInfo> Info = nullptr;
 
 public:
-  // WARNING: Acquires the ownership of ABIInfo.
-  TargetCodeGenInfo(ABIInfo *info = nullptr) : Info(info) {}
+  TargetCodeGenInfo(std::unique_ptr<ABIInfo> Info) : Info(std::move(Info)) {}
   virtual ~TargetCodeGenInfo();
 
   /// getABIInfo() - Returns ABI info helper for the target.
   const ABIInfo &getABIInfo() const { return *Info; }
 
   /// setTargetAttributes - Provides a convenient hook to handle extra
   /// target-specific attributes for the given global.
   virtual void setTargetAttributes(const Decl *D, llvm::GlobalValue *GV,
                                    CodeGen::CodeGenModule &M) const {}

clang/lib/CodeGen/TargetInfo.cpp

static Address emitMergePHI(CodeGenFunction &CGF,
   assert(Addr1.getType() == Addr2.getType());
   llvm::PHINode *PHI = CGF.Builder.CreatePHI(Addr1.getType(), 2, Name);
   PHI->addIncoming(Addr1.getPointer(), Block1);
   PHI->addIncoming(Addr2.getPointer(), Block2);
   CharUnits Align = std::min(Addr1.getAlignment(), Addr2.getAlignment());
   return Address(PHI, Align);
 }
 
-TargetCodeGenInfo::~TargetCodeGenInfo() { delete Info; }
+TargetCodeGenInfo::~TargetCodeGenInfo() = default;
 
 // If someone can figure out a general rule for this, that would be great.
 // It's probably just doomed to be platform-dependent, though.
 unsigned TargetCodeGenInfo::getSizeOfUnwindException() const {
   // Verified for:
   //   x86-64     FreeBSD, Linux, Darwin
   //   x86-32     FreeBSD, Linux, Darwin
   //   PowerPC    Linux, Darwin
Address EmitVAArg(CodeGenFunction &CGF, Address VAListAddr,
                     QualType Ty) const override {
     return EmitVAArgInstr(CGF, VAListAddr, Ty, classifyArgumentType(Ty));
   }
 };
 
 class DefaultTargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   DefaultTargetCodeGenInfo(CodeGen::CodeGenTypes &CGT)
-    : TargetCodeGenInfo(new DefaultABIInfo(CGT)) {}
+      : TargetCodeGenInfo(std::make_unique<DefaultABIInfo>(CGT)) {}
 };
 
 ABIArgInfo DefaultABIInfo::classifyArgumentType(QualType Ty) const {
   Ty = useFirstFieldIfTransparentUnion(Ty);
 
   if (isAggregateTypeForABI(Ty)) {
     // Records with non-trivial destructors/copy-constructors should not be
     // passed by value.
bool isSwiftErrorInRegister() const override {
     return false;
   }
 };
 
 class WebAssemblyTargetCodeGenInfo final : public TargetCodeGenInfo {
 public:
   explicit WebAssemblyTargetCodeGenInfo(CodeGen::CodeGenTypes &CGT,
                                         WebAssemblyABIInfo::ABIKind K)
-      : TargetCodeGenInfo(new WebAssemblyABIInfo(CGT, K)) {}
+      : TargetCodeGenInfo(std::make_unique<WebAssemblyABIInfo>(CGT, K)) {}
 
   void setTargetAttributes(const Decl *D, llvm::GlobalValue *GV,
                            CodeGen::CodeGenModule &CGM) const override {
     TargetCodeGenInfo::setTargetAttributes(D, GV, CGM);
     if (const auto *FD = dyn_cast_or_null<FunctionDecl>(D)) {
       if (const auto *Attr = FD->getAttr<WebAssemblyImportModuleAttr>()) {
         llvm::Function *Fn = cast<llvm::Function>(GV);
         llvm::AttrBuilder B;
public:
 
   void computeInfo(CGFunctionInfo &FI) const override;
   Address EmitVAArg(CodeGenFunction &CGF,
                     Address VAListAddr, QualType Ty) const override;
 };
 
 class PNaClTargetCodeGenInfo : public TargetCodeGenInfo {
  public:
    PNaClTargetCodeGenInfo(CodeGen::CodeGenTypes &CGT)
-    : TargetCodeGenInfo(new PNaClABIInfo(CGT)) {}
+       : TargetCodeGenInfo(std::make_unique<PNaClABIInfo>(CGT)) {}
 };
 
 void PNaClABIInfo::computeInfo(CGFunctionInfo &FI) const {
   if (!getCXXABI().classifyReturnType(FI))
     FI.getReturnInfo() = classifyReturnType(FI.getReturnType());
 
   for (auto &I : FI.arguments())
     I.info = classifyArgumentType(I.type);
public:
   }
 };
 
 class X86_32TargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   X86_32TargetCodeGenInfo(CodeGen::CodeGenTypes &CGT, bool DarwinVectorABI,
                           bool RetSmallStructInRegABI, bool Win32StructABI,
                           unsigned NumRegisterParameters, bool SoftFloatABI)
-      : TargetCodeGenInfo(new X86_32ABIInfo(
+      : TargetCodeGenInfo(std::make_unique<X86_32ABIInfo>(
             CGT, DarwinVectorABI, RetSmallStructInRegABI, Win32StructABI,
             NumRegisterParameters, SoftFloatABI)) {}
 
   static bool isStructReturnInRegABI(
       const llvm::Triple &Triple, const CodeGenOptions &Opts);
 
   void setTargetAttributes(const Decl *D, llvm::GlobalValue *GV,
                            CodeGen::CodeGenModule &CGM) const override;
private:
   X86AVXABILevel AVXLevel;
 
   bool IsMingw64;
 };
 
 class X86_64TargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   X86_64TargetCodeGenInfo(CodeGen::CodeGenTypes &CGT, X86AVXABILevel AVXLevel)
-      : TargetCodeGenInfo(new X86_64ABIInfo(CGT, AVXLevel)) {}
+      : TargetCodeGenInfo(std::make_unique<X86_64ABIInfo>(CGT, AVXLevel)) {}
 
   const X86_64ABIInfo &getABIInfo() const {
     return static_cast<const X86_64ABIInfo&>(TargetCodeGenInfo::getABIInfo());
   }
 
   /// Disable tail call on x86-64. The epilogue code before the tail jump blocks
   /// the autoreleaseRV/retainRV optimization.
   bool shouldSuppressTailCallsOfRetainAutoreleasedReturnValue() const override {
if (GV->isDeclaration())
     return;
   addStackProbeTargetAttributes(D, GV, CGM);
 }
 
 class WinX86_64TargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   WinX86_64TargetCodeGenInfo(CodeGen::CodeGenTypes &CGT,
                              X86AVXABILevel AVXLevel)
-      : TargetCodeGenInfo(new WinX86_64ABIInfo(CGT, AVXLevel)) {}
+      : TargetCodeGenInfo(std::make_unique<WinX86_64ABIInfo>(CGT, AVXLevel)) {}
 
   void setTargetAttributes(const Decl *D, llvm::GlobalValue *GV,
                            CodeGen::CodeGenModule &CGM) const override;
 
   int getDwarfEHStackPointer(CodeGen::CodeGenModule &CGM) const override {
     return 7;
   }
 
public:
   Address EmitVAArg(CodeGenFunction &CGF, Address VAListAddr,
                     QualType Ty) const override;
 };
 
 class PPC32TargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   PPC32TargetCodeGenInfo(CodeGenTypes &CGT, bool SoftFloatABI,
                          bool RetSmallStructInRegABI)
-      : TargetCodeGenInfo(new PPC32_SVR4_ABIInfo(CGT, SoftFloatABI,
-                                                 RetSmallStructInRegABI)) {}
+      : TargetCodeGenInfo(std::make_unique<PPC32_SVR4_ABIInfo>(
+            CGT, SoftFloatABI, RetSmallStructInRegABI)) {}
 
   static bool isStructReturnInRegABI(const llvm::Triple &Triple,
                                      const CodeGenOptions &Opts);
 
   int getDwarfEHStackPointer(CodeGen::CodeGenModule &M) const override {
     // This is recovered from gcc output.
     return 1; // r1 is the dedicated stack pointer
   }

 };
 
 class PPC64_SVR4_TargetCodeGenInfo : public TargetCodeGenInfo {
 
 public:
   PPC64_SVR4_TargetCodeGenInfo(CodeGenTypes &CGT,
                                PPC64_SVR4_ABIInfo::ABIKind Kind, bool HasQPX,
                                bool SoftFloatABI)
-      : TargetCodeGenInfo(new PPC64_SVR4_ABIInfo(CGT, Kind, HasQPX,
-                                                 SoftFloatABI)) {}
+      : TargetCodeGenInfo(std::make_unique<PPC64_SVR4_ABIInfo>(
+            CGT, Kind, HasQPX, SoftFloatABI)) {}
 
   int getDwarfEHStackPointer(CodeGen::CodeGenModule &M) const override {
     // This is recovered from gcc output.
     return 1; // r1 is the dedicated stack pointer
   }
 
   bool initDwarfEHRegSizeTable(CodeGen::CodeGenFunction &CGF,
                                llvm::Value *Address) const override;
private:
 
   bool isLegalVectorTypeForSwift(CharUnits totalSize, llvm::Type *eltTy,
                                  unsigned elts) const override;
 };
 
 class AArch64TargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   AArch64TargetCodeGenInfo(CodeGenTypes &CGT, AArch64ABIInfo::ABIKind Kind)
-      : TargetCodeGenInfo(new AArch64ABIInfo(CGT, Kind)) {}
+      : TargetCodeGenInfo(std::make_unique<AArch64ABIInfo>(CGT, Kind)) {}
 
   StringRef getARCRetainAutoreleasedReturnValueMarker() const override {
     return "mov\tfp, fp\t\t// marker for objc_retainAutoreleaseReturnValue";
   }
 
   int getDwarfEHStackPointer(CodeGen::CodeGenModule &M) const override {
     return 31;
   }
private:
   }
   bool isLegalVectorTypeForSwift(CharUnits totalSize, llvm::Type *eltTy,
                                  unsigned elts) const override;
 };
 
 class ARMTargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   ARMTargetCodeGenInfo(CodeGenTypes &CGT, ARMABIInfo::ABIKind K)
-    :TargetCodeGenInfo(new ARMABIInfo(CGT, K)) {}
+      : TargetCodeGenInfo(std::make_unique<ARMABIInfo>(CGT, K)) {}
 
   const ARMABIInfo &getABIInfo() const {
     return static_cast<const ARMABIInfo&>(TargetCodeGenInfo::getABIInfo());
   }
 
   int getDwarfEHStackPointer(CodeGen::CodeGenModule &M) const override {
     return 13;
   }
public:
   void computeInfo(CGFunctionInfo &FI) const override;
   Address EmitVAArg(CodeGenFunction &CGF, Address VAListAddr,
                     QualType Ty) const override;
 };
 
 class NVPTXTargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   NVPTXTargetCodeGenInfo(CodeGenTypes &CGT)
-      : TargetCodeGenInfo(new NVPTXABIInfo(CGT, *this)) {}
+      : TargetCodeGenInfo(std::make_unique<NVPTXABIInfo>(CGT, *this)) {}
 
   void setTargetAttributes(const Decl *D, llvm::GlobalValue *GV,
                            CodeGen::CodeGenModule &M) const override;
   bool shouldEmitStaticExternCAliases() const override;
 
   llvm::Type *getCUDADeviceBuiltinSurfaceDeviceType() const override {
     // On the device side, surface reference is represented as an object handle
     // in 64-bit integer.
public:
   bool isSwiftErrorInRegister() const override {
     return false;
   }
 };
 
 class SystemZTargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   SystemZTargetCodeGenInfo(CodeGenTypes &CGT, bool HasVector, bool SoftFloatABI)
-    : TargetCodeGenInfo(new SystemZABIInfo(CGT, HasVector, SoftFloatABI)) {}
+      : TargetCodeGenInfo(
+            std::make_unique<SystemZABIInfo>(CGT, HasVector, SoftFloatABI)) {}
 };
 
 }
 
 bool SystemZABIInfo::isPromotableIntegerType(QualType Ty) const {
   // Treat an enum type as its underlying type.
   if (const EnumType *EnumTy = Ty->getAs<EnumType>())
     Ty = EnumTy->getDecl()->getIntegerType();

 // MSP430 ABI Implementation
 //===----------------------------------------------------------------------===//
 
 namespace {
 
 class MSP430TargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   MSP430TargetCodeGenInfo(CodeGenTypes &CGT)
-    : TargetCodeGenInfo(new DefaultABIInfo(CGT)) {}
+      : TargetCodeGenInfo(std::make_unique<DefaultABIInfo>(CGT)) {}
   void setTargetAttributes(const Decl *D, llvm::GlobalValue *GV,
                            CodeGen::CodeGenModule &M) const override;
 };
 
 }
 
 void MSP430TargetCodeGenInfo::setTargetAttributes(
     const Decl *D, llvm::GlobalValue *GV, CodeGen::CodeGenModule &M) const {
Address EmitVAArg(CodeGenFunction &CGF, Address VAListAddr,
                     QualType Ty) const override;
   ABIArgInfo extendType(QualType Ty) const;
 };
 
 class MIPSTargetCodeGenInfo : public TargetCodeGenInfo {
   unsigned SizeOfUnwindException;
 public:
   MIPSTargetCodeGenInfo(CodeGenTypes &CGT, bool IsO32)
-    : TargetCodeGenInfo(new MipsABIInfo(CGT, IsO32)),
+      : TargetCodeGenInfo(std::make_unique<MipsABIInfo>(CGT, IsO32)),
         SizeOfUnwindException(IsO32 ? 24 : 32) {}
 
   int getDwarfEHStackPointer(CodeGen::CodeGenModule &CGM) const override {
     return 29;
   }
 
   void setTargetAttributes(const Decl *D, llvm::GlobalValue *GV,
                            CodeGen::CodeGenModule &CGM) const override {
     const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D);

 //===----------------------------------------------------------------------===//
 // AVR ABI Implementation.
 //===----------------------------------------------------------------------===//
 
 namespace {
 class AVRTargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   AVRTargetCodeGenInfo(CodeGenTypes &CGT)
-    : TargetCodeGenInfo(new DefaultABIInfo(CGT)) { }
+      : TargetCodeGenInfo(std::make_unique<DefaultABIInfo>(CGT)) {}
 
   void setTargetAttributes(const Decl *D, llvm::GlobalValue *GV,
                            CodeGen::CodeGenModule &CGM) const override {
     if (GV->isDeclaration())
       return;
     const auto *FD = dyn_cast_or_null<FunctionDecl>(D);
     if (!FD) return;
     auto *Fn = cast<llvm::Function>(GV);
Address EmitVAArgForHexagon(CodeGenFunction &CFG, Address VAListAddr,
                               QualType Ty) const;
   Address EmitVAArgForHexagonLinux(CodeGenFunction &CFG, Address VAListAddr,
                                    QualType Ty) const;
 };
 
 class HexagonTargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   HexagonTargetCodeGenInfo(CodeGenTypes &CGT)
-    : TargetCodeGenInfo(new HexagonABIInfo(CGT)) {}
+      : TargetCodeGenInfo(std::make_unique<HexagonABIInfo>(CGT)) {}
 
   int getDwarfEHStackPointer(CodeGen::CodeGenModule &M) const override {
     return 29;
   }
 
   void setTargetAttributes(const Decl *D, llvm::GlobalValue *GV,
                            CodeGen::CodeGenModule &GCM) const override {
     if (GV->isDeclaration())
if (InReg)
     return ABIArgInfo::getDirectInReg();
   return ABIArgInfo::getDirect();
 }
 
 namespace {
 class LanaiTargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   LanaiTargetCodeGenInfo(CodeGen::CodeGenTypes &CGT)
-      : TargetCodeGenInfo(new LanaiABIInfo(CGT)) {}
+      : TargetCodeGenInfo(std::make_unique<LanaiABIInfo>(CGT)) {}
 };
 }
 
 //===----------------------------------------------------------------------===//
 // AMDGPU ABI Implementation
 //===----------------------------------------------------------------------===//
 
 namespace {
ABIArgInfo AMDGPUABIInfo::classifyArgumentType(QualType Ty,
   }
 
   return ArgInfo;
 }
 
 class AMDGPUTargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   AMDGPUTargetCodeGenInfo(CodeGenTypes &CGT)
-    : TargetCodeGenInfo(new AMDGPUABIInfo(CGT)) {}
+      : TargetCodeGenInfo(std::make_unique<AMDGPUABIInfo>(CGT)) {}
   void setTargetAttributes(const Decl *D, llvm::GlobalValue *GV,
                            CodeGen::CodeGenModule &M) const override;
   unsigned getOpenCLKernelCallingConv() const override;
 
   llvm::Constant *getNullPointer(const CodeGen::CodeGenModule &CGM,
       llvm::PointerType *T, QualType QT) const override;
 
   LangAS getASTAllocaAddressSpace() const override {
void SparcV8ABIInfo::computeInfo(CGFunctionInfo &FI) const {
   for (auto &Arg : FI.arguments())
     Arg.info = classifyArgumentType(Arg.type);
 }
 
 namespace {
 class SparcV8TargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   SparcV8TargetCodeGenInfo(CodeGenTypes &CGT)
-    : TargetCodeGenInfo(new SparcV8ABIInfo(CGT)) {}
+      : TargetCodeGenInfo(std::make_unique<SparcV8ABIInfo>(CGT)) {}
 };
 } // end anonymous namespace
 
 //===----------------------------------------------------------------------===//
 // SPARC v9 ABI Implementation.
 // Based on the SPARC Compliance Definition version 2.4.1.
 //
 // Function arguments a mapped to a nominal "parameter array" and promoted to
void SparcV9ABIInfo::computeInfo(CGFunctionInfo &FI) const {
   for (auto &I : FI.arguments())
     I.info = classifyType(I.type, 16 * 8);
 }
 
 namespace {
 class SparcV9TargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   SparcV9TargetCodeGenInfo(CodeGenTypes &CGT)
-    : TargetCodeGenInfo(new SparcV9ABIInfo(CGT)) {}
+      : TargetCodeGenInfo(std::make_unique<SparcV9ABIInfo>(CGT)) {}
 
   int getDwarfEHStackPointer(CodeGen::CodeGenModule &M) const override {
     return 14;
   }
 
   bool initDwarfEHRegSizeTable(CodeGen::CodeGenFunction &CGF,
                                llvm::Value *Address) const override;
 };
private:
   ABIArgInfo getIndirectByValue(QualType Ty) const;
   ABIArgInfo classifyArgumentType(QualType Ty, uint8_t FreeRegs) const;
   ABIArgInfo classifyReturnType(QualType RetTy) const;
 };
 
 class ARCTargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   ARCTargetCodeGenInfo(CodeGenTypes &CGT)
-      : TargetCodeGenInfo(new ARCABIInfo(CGT)) {}
+      : TargetCodeGenInfo(std::make_unique<ARCABIInfo>(CGT)) {}
 };
 
 
 ABIArgInfo ARCABIInfo::getIndirectByRef(QualType Ty, bool HasFreeRegs) const {
   return HasFreeRegs ? getNaturalAlignIndirectInReg(Ty) :
                        getNaturalAlignIndirect(Ty, false);
 }
 
public:
   Address EmitVAArg(CodeGenFunction &CGF, Address VAListAddr,
                     QualType Ty) const override;
 };
 
 class XCoreTargetCodeGenInfo : public TargetCodeGenInfo {
   mutable TypeStringCache TSC;
 public:
   XCoreTargetCodeGenInfo(CodeGenTypes &CGT)
-    :TargetCodeGenInfo(new XCoreABIInfo(CGT)) {}
+      : TargetCodeGenInfo(std::make_unique<XCoreABIInfo>(CGT)) {}
   void emitTargetMD(const Decl *D, llvm::GlobalValue *GV,
                     CodeGen::CodeGenModule &M) const override;
 };
 
 } // End anonymous namespace.
 
 // TODO: this implementation is likely now redundant with the default
 // EmitVAArg.

 //===----------------------------------------------------------------------===//
 // SPIR ABI Implementation
 //===----------------------------------------------------------------------===//
 
 namespace {
 class SPIRTargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   SPIRTargetCodeGenInfo(CodeGen::CodeGenTypes &CGT)
-    : TargetCodeGenInfo(new DefaultABIInfo(CGT)) {}
+      : TargetCodeGenInfo(std::make_unique<DefaultABIInfo>(CGT)) {}
   unsigned getOpenCLKernelCallingConv() const override;
 };
 
 } // End anonymous namespace.
 
 namespace clang {
 namespace CodeGen {
 void computeSPIRKernelABIInfo(CodeGenModule &CGM, CGFunctionInfo &FI) {
ABIArgInfo RISCVABIInfo::extendType(QualType Ty) const {
   return ABIArgInfo::getExtend(Ty);
 }
 
 namespace {
 class RISCVTargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   RISCVTargetCodeGenInfo(CodeGen::CodeGenTypes &CGT, unsigned XLen,
                          unsigned FLen)
-      : TargetCodeGenInfo(new RISCVABIInfo(CGT, XLen, FLen)) {}
+      : TargetCodeGenInfo(std::make_unique<RISCVABIInfo>(CGT, XLen, FLen)) {}
 
   void setTargetAttributes(const Decl *D, llvm::GlobalValue *GV,
                            CodeGen::CodeGenModule &CGM) const override {
     const auto *FD = dyn_cast_or_null<FunctionDecl>(D);
     if (!FD) return;
 
     const auto *Attr = FD->getAttr<RISCVInterruptAttr>();
     if (!Attr)