X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FTargetData.cpp;h=cc6dc1e25998eb4379d0c9fb05b8e33f8a428c41;hb=afc945b614a2bf99014d5820c8849451030ea82b;hp=c628df04e710c9feaed7ea46d9b8546e3a37aac1;hpb=1f6efa3996dd1929fbc129203ce5009b620e6969;p=oota-llvm.git diff --git a/lib/Target/TargetData.cpp b/lib/Target/TargetData.cpp index c628df04e71..cc6dc1e2599 100644 --- a/lib/Target/TargetData.cpp +++ b/lib/Target/TargetData.cpp @@ -41,14 +41,15 @@ char TargetData::ID = 0; // Support for StructLayout //===----------------------------------------------------------------------===// -StructLayout::StructLayout(const StructType *ST, const TargetData &TD) { +StructLayout::StructLayout(StructType *ST, const TargetData &TD) { + assert(!ST->isOpaque() && "Cannot get layout of opaque structs"); StructAlignment = 0; StructSize = 0; NumElements = ST->getNumElements(); // Loop over each of the elements, placing them in memory. for (unsigned i = 0, e = NumElements; i != e; ++i) { - const Type *Ty = ST->getElementType(i); + Type *Ty = ST->getElementType(i); unsigned TyAlign = ST->isPacked() ? 1 : TD.getABITypeAlignment(Ty); // Add padding if necessary to align the data element properly. @@ -116,28 +117,29 @@ TargetAlignElem::operator==(const TargetAlignElem &rhs) const { && TypeBitWidth == rhs.TypeBitWidth); } -const TargetAlignElem TargetData::InvalidAlignmentElem = - TargetAlignElem::get((AlignTypeEnum) -1, 0, 0, 0); +const TargetAlignElem +TargetData::InvalidAlignmentElem = { (AlignTypeEnum)0xFF, 0, 0, 0 }; //===----------------------------------------------------------------------===// // TargetData Class Implementation //===----------------------------------------------------------------------===// /// getInt - Get an integer ignoring errors. -static unsigned getInt(StringRef R) { - unsigned Result = 0; +static int getInt(StringRef R) { + int Result = 0; R.getAsInteger(10, Result); return Result; } -void TargetData::init(StringRef Desc) { +void TargetData::init() { initializeTargetDataPass(*PassRegistry::getPassRegistry()); - + LayoutMap = 0; LittleEndian = false; PointerMemSize = 8; PointerABIAlign = 8; PointerPrefAlign = PointerABIAlign; + StackNaturalAlign = 0; // Default alignments setAlignment(INTEGER_ALIGN, 1, 1, 1); // i1 @@ -145,11 +147,19 @@ void TargetData::init(StringRef Desc) { setAlignment(INTEGER_ALIGN, 2, 2, 16); // i16 setAlignment(INTEGER_ALIGN, 4, 4, 32); // i32 setAlignment(INTEGER_ALIGN, 4, 8, 64); // i64 + setAlignment(FLOAT_ALIGN, 2, 2, 16); // half setAlignment(FLOAT_ALIGN, 4, 4, 32); // float setAlignment(FLOAT_ALIGN, 8, 8, 64); // double + setAlignment(FLOAT_ALIGN, 16, 16, 128); // ppcf128, quad, ... setAlignment(VECTOR_ALIGN, 8, 8, 64); // v2i32, v1i64, ... setAlignment(VECTOR_ALIGN, 16, 16, 128); // v16i8, v8i16, v4i32, ... setAlignment(AGGREGATE_ALIGN, 0, 8, 0); // struct +} + +std::string TargetData::parseSpecifier(StringRef Desc, TargetData *td) { + + if (td) + td->init(); while (!Desc.empty()) { std::pair Split = Desc.split('-'); @@ -167,28 +177,54 @@ void TargetData::init(StringRef Desc) { switch (Specifier[0]) { case 'E': - LittleEndian = false; + if (td) + td->LittleEndian = false; break; case 'e': - LittleEndian = true; + if (td) + td->LittleEndian = true; break; - case 'p': + case 'p': { + // Pointer size. Split = Token.split(':'); - PointerMemSize = getInt(Split.first) / 8; + int PointerMemSizeBits = getInt(Split.first); + if (PointerMemSizeBits < 0 || PointerMemSizeBits % 8 != 0) + return "invalid pointer size, must be a positive 8-bit multiple"; + if (td) + td->PointerMemSize = PointerMemSizeBits / 8; + + // Pointer ABI alignment. Split = Split.second.split(':'); - PointerABIAlign = getInt(Split.first) / 8; + int PointerABIAlignBits = getInt(Split.first); + if (PointerABIAlignBits < 0 || PointerABIAlignBits % 8 != 0) { + return "invalid pointer ABI alignment, " + "must be a positive 8-bit multiple"; + } + if (td) + td->PointerABIAlign = PointerABIAlignBits / 8; + + // Pointer preferred alignment. Split = Split.second.split(':'); - PointerPrefAlign = getInt(Split.first) / 8; - if (PointerPrefAlign == 0) - PointerPrefAlign = PointerABIAlign; + int PointerPrefAlignBits = getInt(Split.first); + if (PointerPrefAlignBits < 0 || PointerPrefAlignBits % 8 != 0) { + return "invalid pointer preferred alignment, " + "must be a positive 8-bit multiple"; + } + if (td) { + td->PointerPrefAlign = PointerPrefAlignBits / 8; + if (td->PointerPrefAlign == 0) + td->PointerPrefAlign = td->PointerABIAlign; + } break; + } case 'i': case 'v': case 'f': case 'a': case 's': { AlignTypeEnum AlignType; - switch (Specifier[0]) { + char field = Specifier[0]; + switch (field) { default: case 'i': AlignType = INTEGER_ALIGN; break; case 'v': AlignType = VECTOR_ALIGN; break; @@ -196,32 +232,66 @@ void TargetData::init(StringRef Desc) { case 'a': AlignType = AGGREGATE_ALIGN; break; case 's': AlignType = STACK_ALIGN; break; } - unsigned Size = getInt(Specifier.substr(1)); + int Size = getInt(Specifier.substr(1)); + if (Size < 0) { + return std::string("invalid ") + field + "-size field, " + "must be positive"; + } + Split = Token.split(':'); - unsigned ABIAlign = getInt(Split.first) / 8; + int ABIAlignBits = getInt(Split.first); + if (ABIAlignBits < 0 || ABIAlignBits % 8 != 0) { + return std::string("invalid ") + field +"-abi-alignment field, " + "must be a positive 8-bit multiple"; + } + unsigned ABIAlign = ABIAlignBits / 8; Split = Split.second.split(':'); - unsigned PrefAlign = getInt(Split.first) / 8; + + int PrefAlignBits = getInt(Split.first); + if (PrefAlignBits < 0 || PrefAlignBits % 8 != 0) { + return std::string("invalid ") + field +"-preferred-alignment field, " + "must be a positive 8-bit multiple"; + } + unsigned PrefAlign = PrefAlignBits / 8; if (PrefAlign == 0) PrefAlign = ABIAlign; - setAlignment(AlignType, ABIAlign, PrefAlign, Size); + + if (td) + td->setAlignment(AlignType, ABIAlign, PrefAlign, Size); break; } case 'n': // Native integer types. Specifier = Specifier.substr(1); do { - if (unsigned Width = getInt(Specifier)) - LegalIntWidths.push_back(Width); + int Width = getInt(Specifier); + if (Width <= 0) { + return std::string("invalid native integer size \'") + Specifier.str() + + "\', must be a positive integer."; + } + if (td && Width != 0) + td->LegalIntWidths.push_back(Width); Split = Token.split(':'); Specifier = Split.first; Token = Split.second; } while (!Specifier.empty() || !Token.empty()); break; - + case 'S': { // Stack natural alignment. + int StackNaturalAlignBits = getInt(Specifier.substr(1)); + if (StackNaturalAlignBits < 0 || StackNaturalAlignBits % 8 != 0) { + return "invalid natural stack alignment (S-field), " + "must be a positive 8-bit multiple"; + } + if (td) + td->StackNaturalAlign = StackNaturalAlignBits / 8; + break; + } default: break; } } + + return ""; } /// Default ctor. @@ -235,7 +305,9 @@ TargetData::TargetData() : ImmutablePass(ID) { TargetData::TargetData(const Module *M) : ImmutablePass(ID) { - init(M->getDataLayout()); + std::string errMsg = parseSpecifier(M->getDataLayout(), this); + assert(errMsg == "" && "Module M has malformed target data layout string."); + (void)errMsg; } void @@ -260,7 +332,7 @@ TargetData::setAlignment(AlignTypeEnum align_type, unsigned abi_align, /// preferred if ABIInfo = false) the target wants for the specified datatype. unsigned TargetData::getAlignmentInfo(AlignTypeEnum AlignType, uint32_t BitWidth, bool ABIInfo, - const Type *Ty) const { + Type *Ty) const { // Check to see if we have an exact match and remember the best match we see. int BestMatchIdx = -1; int LargestInt = -1; @@ -301,7 +373,7 @@ unsigned TargetData::getAlignmentInfo(AlignTypeEnum AlignType, // If the alignment is not a power of 2, round up to the next power of 2. // This happens for non-power-of-2 length vectors. if (Align & (Align-1)) - Align = llvm::NextPowerOf2(Align); + Align = NextPowerOf2(Align); return Align; } } @@ -313,64 +385,22 @@ unsigned TargetData::getAlignmentInfo(AlignTypeEnum AlignType, namespace { -class StructLayoutMap : public AbstractTypeUser { - typedef DenseMap LayoutInfoTy; +class StructLayoutMap { + typedef DenseMap LayoutInfoTy; LayoutInfoTy LayoutInfo; - void RemoveEntry(LayoutInfoTy::iterator I, bool WasAbstract) { - I->second->~StructLayout(); - free(I->second); - if (WasAbstract) - I->first->removeAbstractTypeUser(this); - LayoutInfo.erase(I); - } - - - /// refineAbstractType - The callback method invoked when an abstract type is - /// resolved to another type. An object must override this method to update - /// its internal state to reference NewType instead of OldType. - /// - virtual void refineAbstractType(const DerivedType *OldTy, - const Type *) { - LayoutInfoTy::iterator I = LayoutInfo.find(cast(OldTy)); - assert(I != LayoutInfo.end() && "Using type but not in map?"); - RemoveEntry(I, true); - } - - /// typeBecameConcrete - The other case which AbstractTypeUsers must be aware - /// of is when a type makes the transition from being abstract (where it has - /// clients on its AbstractTypeUsers list) to concrete (where it does not). - /// This method notifies ATU's when this occurs for a type. - /// - virtual void typeBecameConcrete(const DerivedType *AbsTy) { - LayoutInfoTy::iterator I = LayoutInfo.find(cast(AbsTy)); - assert(I != LayoutInfo.end() && "Using type but not in map?"); - RemoveEntry(I, true); - } - public: virtual ~StructLayoutMap() { // Remove any layouts. - for (LayoutInfoTy::iterator - I = LayoutInfo.begin(), E = LayoutInfo.end(); I != E; ++I) { - const Type *Key = I->first; + for (LayoutInfoTy::iterator I = LayoutInfo.begin(), E = LayoutInfo.end(); + I != E; ++I) { StructLayout *Value = I->second; - - if (Key->isAbstract()) - Key->removeAbstractTypeUser(this); - Value->~StructLayout(); free(Value); } } - void InvalidateEntry(const StructType *Ty) { - LayoutInfoTy::iterator I = LayoutInfo.find(Ty); - if (I == LayoutInfo.end()) return; - RemoveEntry(I, Ty->isAbstract()); - } - - StructLayout *&operator[](const StructType *STy) { + StructLayout *&operator[](StructType *STy) { return LayoutInfo[STy]; } @@ -384,7 +414,7 @@ TargetData::~TargetData() { delete static_cast(LayoutMap); } -const StructLayout *TargetData::getStructLayout(const StructType *Ty) const { +const StructLayout *TargetData::getStructLayout(StructType *Ty) const { if (!LayoutMap) LayoutMap = new StructLayoutMap(); @@ -404,29 +434,18 @@ const StructLayout *TargetData::getStructLayout(const StructType *Ty) const { new (L) StructLayout(Ty, *this); - if (Ty->isAbstract()) - Ty->addAbstractTypeUser(STM); - return L; } -/// InvalidateStructLayoutInfo - TargetData speculatively caches StructLayout -/// objects. If a TargetData object is alive when types are being refined and -/// removed, this method must be called whenever a StructType is removed to -/// avoid a dangling pointer in this cache. -void TargetData::InvalidateStructLayoutInfo(const StructType *Ty) const { - if (!LayoutMap) return; // No cache. - - static_cast(LayoutMap)->InvalidateEntry(Ty); -} - std::string TargetData::getStringRepresentation() const { std::string Result; raw_string_ostream OS(Result); OS << (LittleEndian ? "e" : "E") << "-p:" << PointerMemSize*8 << ':' << PointerABIAlign*8 - << ':' << PointerPrefAlign*8; + << ':' << PointerPrefAlign*8 + << "-S" << StackNaturalAlign*8; + for (unsigned i = 0, e = Alignments.size(); i != e; ++i) { const TargetAlignElem &AI = Alignments[i]; OS << '-' << (char)AI.AlignType << AI.TypeBitWidth << ':' @@ -443,14 +462,14 @@ std::string TargetData::getStringRepresentation() const { } -uint64_t TargetData::getTypeSizeInBits(const Type *Ty) const { +uint64_t TargetData::getTypeSizeInBits(Type *Ty) const { assert(Ty->isSized() && "Cannot getTypeInfo() on a type that is unsized!"); switch (Ty->getTypeID()) { case Type::LabelTyID: case Type::PointerTyID: return getPointerSizeInBits(); case Type::ArrayTyID: { - const ArrayType *ATy = cast(Ty); + ArrayType *ATy = cast(Ty); return getTypeAllocSizeInBits(ATy->getElementType())*ATy->getNumElements(); } case Type::StructTyID: @@ -460,6 +479,8 @@ uint64_t TargetData::getTypeSizeInBits(const Type *Ty) const { return cast(Ty)->getBitWidth(); case Type::VoidTyID: return 8; + case Type::HalfTyID: + return 16; case Type::FloatTyID: return 32; case Type::DoubleTyID: @@ -476,9 +497,7 @@ uint64_t TargetData::getTypeSizeInBits(const Type *Ty) const { return cast(Ty)->getBitWidth(); default: llvm_unreachable("TargetData::getTypeSizeInBits(): Unsupported type"); - break; } - return 0; } /*! @@ -489,7 +508,7 @@ uint64_t TargetData::getTypeSizeInBits(const Type *Ty) const { Get the ABI (\a abi_or_pref == true) or preferred alignment (\a abi_or_pref == false) for the requested type \a Ty. */ -unsigned TargetData::getAlignment(const Type *Ty, bool abi_or_pref) const { +unsigned TargetData::getAlignment(Type *Ty, bool abi_or_pref) const { int AlignType = -1; assert(Ty->isSized() && "Cannot getTypeInfo() on a type that is unsized!"); @@ -517,6 +536,7 @@ unsigned TargetData::getAlignment(const Type *Ty, bool abi_or_pref) const { case Type::VoidTyID: AlignType = INTEGER_ALIGN; break; + case Type::HalfTyID: case Type::FloatTyID: case Type::DoubleTyID: // PPC_FP128TyID and FP128TyID have different data contents, but the @@ -532,14 +552,13 @@ unsigned TargetData::getAlignment(const Type *Ty, bool abi_or_pref) const { break; default: llvm_unreachable("Bad type for getAlignment!!!"); - break; } return getAlignmentInfo((AlignTypeEnum)AlignType, getTypeSizeInBits(Ty), abi_or_pref, Ty); } -unsigned TargetData::getABITypeAlignment(const Type *Ty) const { +unsigned TargetData::getABITypeAlignment(Type *Ty) const { return getAlignment(Ty, true); } @@ -550,7 +569,7 @@ unsigned TargetData::getABIIntegerTypeAlignment(unsigned BitWidth) const { } -unsigned TargetData::getCallFrameTypeAlignment(const Type *Ty) const { +unsigned TargetData::getCallFrameTypeAlignment(Type *Ty) const { for (unsigned i = 0, e = Alignments.size(); i != e; ++i) if (Alignments[i].AlignType == STACK_ALIGN) return Alignments[i].ABIAlign; @@ -558,11 +577,11 @@ unsigned TargetData::getCallFrameTypeAlignment(const Type *Ty) const { return getABITypeAlignment(Ty); } -unsigned TargetData::getPrefTypeAlignment(const Type *Ty) const { +unsigned TargetData::getPrefTypeAlignment(Type *Ty) const { return getAlignment(Ty, false); } -unsigned TargetData::getPreferredTypeAlignmentShift(const Type *Ty) const { +unsigned TargetData::getPreferredTypeAlignmentShift(Type *Ty) const { unsigned Align = getPrefTypeAlignment(Ty); assert(!(Align & (Align-1)) && "Alignment is not a power of two!"); return Log2_32(Align); @@ -570,21 +589,22 @@ unsigned TargetData::getPreferredTypeAlignmentShift(const Type *Ty) const { /// getIntPtrType - Return an unsigned integer type that is the same size or /// greater to the host pointer size. -const IntegerType *TargetData::getIntPtrType(LLVMContext &C) const { +IntegerType *TargetData::getIntPtrType(LLVMContext &C) const { return IntegerType::get(C, getPointerSizeInBits()); } -uint64_t TargetData::getIndexedOffset(const Type *ptrTy, Value* const* Indices, - unsigned NumIndices) const { - const Type *Ty = ptrTy; +uint64_t TargetData::getIndexedOffset(Type *ptrTy, + ArrayRef Indices) const { + Type *Ty = ptrTy; assert(Ty->isPointerTy() && "Illegal argument for getIndexedOffset()"); uint64_t Result = 0; generic_gep_type_iterator - TI = gep_type_begin(ptrTy, Indices, Indices+NumIndices); - for (unsigned CurIDX = 0; CurIDX != NumIndices; ++CurIDX, ++TI) { - if (const StructType *STy = dyn_cast(*TI)) { + TI = gep_type_begin(ptrTy, Indices); + for (unsigned CurIDX = 0, EndIDX = Indices.size(); CurIDX != EndIDX; + ++CurIDX, ++TI) { + if (StructType *STy = dyn_cast(*TI)) { assert(Indices[CurIDX]->getType() == Type::getInt32Ty(ptrTy->getContext()) && "Illegal struct idx"); @@ -615,12 +635,16 @@ uint64_t TargetData::getIndexedOffset(const Type *ptrTy, Value* const* Indices, /// global. This includes an explicitly requested alignment (if the global /// has one). unsigned TargetData::getPreferredAlignment(const GlobalVariable *GV) const { - const Type *ElemType = GV->getType()->getElementType(); + Type *ElemType = GV->getType()->getElementType(); unsigned Alignment = getPrefTypeAlignment(ElemType); - if (GV->getAlignment() > Alignment) - Alignment = GV->getAlignment(); + unsigned GVAlignment = GV->getAlignment(); + if (GVAlignment >= Alignment) { + Alignment = GVAlignment; + } else if (GVAlignment != 0) { + Alignment = std::max(GVAlignment, getABITypeAlignment(ElemType)); + } - if (GV->hasInitializer()) { + if (GV->hasInitializer() && GVAlignment == 0) { if (Alignment < 16) { // If the global is not external, see if it is large. If so, give it a // larger alignment.