[Alignment][NFC] DataLayout migration to llvm::Align

[gchatelet]

Summary

This is patch is part of a series to introduce an Alignment type.
See this thread for context: http://lists.llvm.org/pipermail/llvm-dev/2019-July/133851.html
See this patch for the introduction of the type: https://reviews.llvm.org/D64790

[courbet]

llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp

1993

move after the sort ?

[gchatelet]

• Address comments

llvm/include/llvm/IR/DataLayout.h

public:
   bool fitsInLegalInteger(unsigned Width) const {
     for (unsigned LegalIntWidth : LegalIntWidths)
       if (Width <= LegalIntWidth)
         return true;
     return false;
   }
 
   /// Layout pointer alignment
-  unsigned getPointerABIAlignment(unsigned AS) const;
+  llvm::Align getPointerABIAlignment(unsigned AS) const;
 
   /// Return target's alignment for stack-based pointers
   /// FIXME: The defaults need to be removed once all of
   /// the backends/clients are updated.
-  unsigned getPointerPrefAlignment(unsigned AS = 0) const;
+  llvm::Align getPointerPrefAlignment(unsigned AS = 0) const;
 
   /// Layout pointer size
   /// FIXME: The defaults need to be removed once all of
   /// the backends/clients are updated.
   unsigned getPointerSize(unsigned AS = 0) const;
 
   /// Returns the maximum pointer size over all address spaces.
   unsigned getMaxPointerSize() const;
uint64_t getTypeAllocSizeInBits(Type *Ty) const {
     return 8 * getTypeAllocSize(Ty);
   }
 
   /// Returns the minimum ABI-required alignment for the specified type.
   unsigned getABITypeAlignment(Type *Ty) const;
 
   /// Returns the minimum ABI-required alignment for an integer type of
   /// the specified bitwidth.
-  unsigned getABIIntegerTypeAlignment(unsigned BitWidth) const;
+  llvm::Align getABIIntegerTypeAlignment(unsigned BitWidth) const;
 
   /// Returns the preferred stack/global alignment for the specified
   /// type.
   ///
   /// This is always at least as good as the ABI alignment.
   unsigned getPrefTypeAlignment(Type *Ty) const;
 
   /// Returns an integer type with size at least as big as that of a

llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp

for (Value *O : InitList->operands()) {
     S.Priority = Priority->getLimitedValue(65535);
     S.Func = CS->getOperand(1);
     if (!CS->getOperand(2)->isNullValue())
       S.ComdatKey =
           dyn_cast<GlobalValue>(CS->getOperand(2)->stripPointerCasts());
   }
 
   // Emit the function pointers in the target-specific order
-  const llvm::Align Align = llvm::Align(DL.getPointerPrefAlignment());
+  const llvm::Align Align = DL.getPointerPrefAlignment();
   llvm::stable_sort(Structors, [](const Structor &L, const Structor &R) {
     return L.Priority < R.Priority;
   });
   for (Structor &S : Structors) {
     const TargetLoweringObjectFile &Obj = getObjFileLowering();
     const MCSymbol *KeySym = nullptr;
     if (GlobalValue *GV = S.ComdatKey) {
       if (GV->isDeclarationForLinker())

llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp

void IRTranslator::getStackGuard(Register DstReg,
   if (!Global)
     return;
 
   MachinePointerInfo MPInfo(Global);
   auto Flags = MachineMemOperand::MOLoad | MachineMemOperand::MOInvariant |
                MachineMemOperand::MODereferenceable;
   MachineMemOperand *MemRef =
       MF->getMachineMemOperand(MPInfo, Flags, DL->getPointerSizeInBits() / 8,
-                               DL->getPointerABIAlignment(0));
+                               DL->getPointerABIAlignment(0).value());
   MIB.setMemRefs({MemRef});
 }
 
 bool IRTranslator::translateOverflowIntrinsic(const CallInst &CI, unsigned Op,
                                               MachineIRBuilder &MIRBuilder) {
   ArrayRef<Register> ResRegs = getOrCreateVRegs(CI);
   MIRBuilder.buildInstr(Op)
       .addDef(ResRegs[0])

llvm/lib/CodeGen/MachineFunction.cpp

 
 /// Return the alignment of each entry in the jump table.
 unsigned MachineJumpTableInfo::getEntryAlignment(const DataLayout &TD) const {
   // The alignment of a jump table entry is the alignment of int32 unless the
   // entry is just the address of a block, in which case it is the pointer
   // alignment.
   switch (getEntryKind()) {
   case MachineJumpTableInfo::EK_BlockAddress:
-    return TD.getPointerABIAlignment(0);
+    return TD.getPointerABIAlignment(0).value();
   case MachineJumpTableInfo::EK_GPRel64BlockAddress:
-    return TD.getABIIntegerTypeAlignment(64);
+    return TD.getABIIntegerTypeAlignment(64).value();
   case MachineJumpTableInfo::EK_GPRel32BlockAddress:
   case MachineJumpTableInfo::EK_LabelDifference32:
   case MachineJumpTableInfo::EK_Custom32:
-    return TD.getABIIntegerTypeAlignment(32);
+    return TD.getABIIntegerTypeAlignment(32).value();
   case MachineJumpTableInfo::EK_Inline:
     return 1;
   }
   llvm_unreachable("Unknown jump table encoding!");
 }
 
 /// Create a new jump table entry in the jump table info.
 unsigned MachineJumpTableInfo::createJumpTableIndex(

llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp

MCSymbolELF *Label =
       cast<MCSymbolELF>(getContext().getOrCreateSymbol(NameData));
   Streamer.EmitSymbolAttribute(Label, MCSA_Hidden);
   Streamer.EmitSymbolAttribute(Label, MCSA_Weak);
   unsigned Flags = ELF::SHF_ALLOC | ELF::SHF_WRITE | ELF::SHF_GROUP;
   MCSection *Sec = getContext().getELFNamedSection(".data", Label->getName(),
                                                    ELF::SHT_PROGBITS, Flags, 0);
   unsigned Size = DL.getPointerSize();
   Streamer.SwitchSection(Sec);
-  Streamer.EmitValueToAlignment(DL.getPointerABIAlignment(0));
+  Streamer.EmitValueToAlignment(DL.getPointerABIAlignment(0).value());
   Streamer.EmitSymbolAttribute(Label, MCSA_ELF_TypeObject);
   const MCExpr *E = MCConstantExpr::create(Size, getContext());
   Streamer.emitELFSize(Label, E);
   Streamer.EmitLabel(Label);
 
   Streamer.EmitSymbolValue(Sym, Size);
 }
 

llvm/lib/IR/DataLayout.cpp

const StructLayout *DataLayout::getStructLayout(StructType *Ty) const {
   // entries to be added to TheMap, invalidating our reference.
   SL = L;
 
   new (L) StructLayout(Ty, *this);
 
   return L;
 }
 
-unsigned DataLayout::getPointerABIAlignment(unsigned AS) const {
+llvm::Align DataLayout::getPointerABIAlignment(unsigned AS) const {
   PointersTy::const_iterator I = findPointerLowerBound(AS);
   if (I == Pointers.end() || I->AddressSpace != AS) {
     I = findPointerLowerBound(0);
     assert(I->AddressSpace == 0);
   }
-  return I->ABIAlign.value();
+  return I->ABIAlign;
 }
 
-unsigned DataLayout::getPointerPrefAlignment(unsigned AS) const {
+llvm::Align DataLayout::getPointerPrefAlignment(unsigned AS) const {
   PointersTy::const_iterator I = findPointerLowerBound(AS);
   if (I == Pointers.end() || I->AddressSpace != AS) {
     I = findPointerLowerBound(0);
     assert(I->AddressSpace == 0);
   }
-  return I->PrefAlign.value();
+  return I->PrefAlign;
 }
 
 unsigned DataLayout::getPointerSize(unsigned AS) const {
   PointersTy::const_iterator I = findPointerLowerBound(AS);
   if (I == Pointers.end() || I->AddressSpace != AS) {
     I = findPointerLowerBound(0);
     assert(I->AddressSpace == 0);
   }

  */
 llvm::Align DataLayout::getAlignment(Type *Ty, bool abi_or_pref) const {
   AlignTypeEnum AlignType;
 
   assert(Ty->isSized() && "Cannot getTypeInfo() on a type that is unsized!");
   switch (Ty->getTypeID()) {
   // Early escape for the non-numeric types.
   case Type::LabelTyID:
-    return llvm::Align(abi_or_pref ? getPointerABIAlignment(0)
-                                   : getPointerPrefAlignment(0));
+    return abi_or_pref ? getPointerABIAlignment(0) : getPointerPrefAlignment(0);
   case Type::PointerTyID: {
     unsigned AS = cast<PointerType>(Ty)->getAddressSpace();
-    return llvm::Align(abi_or_pref ? getPointerABIAlignment(AS)
-                                   : getPointerPrefAlignment(AS));
+    return abi_or_pref ? getPointerABIAlignment(AS)
+                       : getPointerPrefAlignment(AS);
     }
   case Type::ArrayTyID:
     return getAlignment(cast<ArrayType>(Ty)->getElementType(), abi_or_pref);
 
   case Type::StructTyID: {
     // Packed structure types always have an ABI alignment of one.
     if (cast<StructType>(Ty)->isPacked() && abi_or_pref)
       return llvm::Align::None();

 }
 
 unsigned DataLayout::getABITypeAlignment(Type *Ty) const {
   return getAlignment(Ty, true).value();
 }
 
 /// getABIIntegerTypeAlignment - Return the minimum ABI-required alignment for
 /// an integer type of the specified bitwidth.
-unsigned DataLayout::getABIIntegerTypeAlignment(unsigned BitWidth) const {
-  return getAlignmentInfo(INTEGER_ALIGN, BitWidth, true, nullptr).value();
+llvm::Align DataLayout::getABIIntegerTypeAlignment(unsigned BitWidth) const {
+  return getAlignmentInfo(INTEGER_ALIGN, BitWidth, true, nullptr);
 }
 
 unsigned DataLayout::getPrefTypeAlignment(Type *Ty) const {
   return getAlignment(Ty, false).value();
 }
 
 IntegerType *DataLayout::getIntPtrType(LLVMContext &C,
                                        unsigned AddressSpace) const {

llvm/lib/Target/NVPTX/NVPTXAsmPrinter.cpp

for (unsigned i = 0, e = STy->getNumElements(); i != e; i++) {
       if (align > alignStruct)
         alignStruct = align;
     }
     return alignStruct;
   }
 
   auto *FTy = dyn_cast<FunctionType>(Ty);
   if (FTy)
-    return DL.getPointerPrefAlignment();
+    return DL.getPointerPrefAlignment().value();
   return DL.getPrefTypeAlignment(Ty);
 }
 
 void NVPTXAsmPrinter::printParamName(Function::const_arg_iterator I,
                                      int paramIndex, raw_ostream &O) {
   getSymbol(I->getParent())->print(O, MAI);
   O << "_param_" << paramIndex;
 }