// 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.
&& 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
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<StringRef, StringRef> Split = Desc.split('-');
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;
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.
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
/// 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;
// 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;
}
}
namespace {
-class StructLayoutMap : public AbstractTypeUser {
- typedef DenseMap<const StructType*, StructLayout*> LayoutInfoTy;
+class StructLayoutMap {
+ typedef DenseMap<StructType*, StructLayout*> 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<const StructType>(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<const StructType>(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];
}
delete static_cast<StructLayoutMap*>(LayoutMap);
}
-const StructLayout *TargetData::getStructLayout(const StructType *Ty) const {
+const StructLayout *TargetData::getStructLayout(StructType *Ty) const {
if (!LayoutMap)
LayoutMap = new StructLayoutMap();
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<StructLayoutMap*>(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 << ':'
}
-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<ArrayType>(Ty);
+ ArrayType *ATy = cast<ArrayType>(Ty);
return getTypeAllocSizeInBits(ATy->getElementType())*ATy->getNumElements();
}
case Type::StructTyID:
return cast<IntegerType>(Ty)->getBitWidth();
case Type::VoidTyID:
return 8;
+ case Type::HalfTyID:
+ return 16;
case Type::FloatTyID:
return 32;
case Type::DoubleTyID:
return cast<VectorType>(Ty)->getBitWidth();
default:
llvm_unreachable("TargetData::getTypeSizeInBits(): Unsupported type");
- break;
}
- return 0;
}
/*!
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!");
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
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);
}
}
-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;
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);
/// 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<Value *> Indices) const {
+ Type *Ty = ptrTy;
assert(Ty->isPointerTy() && "Illegal argument for getIndexedOffset()");
uint64_t Result = 0;
generic_gep_type_iterator<Value* const*>
- TI = gep_type_begin(ptrTy, Indices, Indices+NumIndices);
- for (unsigned CurIDX = 0; CurIDX != NumIndices; ++CurIDX, ++TI) {
- if (const StructType *STy = dyn_cast<StructType>(*TI)) {
+ TI = gep_type_begin(ptrTy, Indices);
+ for (unsigned CurIDX = 0, EndIDX = Indices.size(); CurIDX != EndIDX;
+ ++CurIDX, ++TI) {
+ if (StructType *STy = dyn_cast<StructType>(*TI)) {
assert(Indices[CurIDX]->getType() ==
Type::getInt32Ty(ptrTy->getContext()) &&
"Illegal struct idx");
/// 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);
unsigned GVAlignment = GV->getAlignment();
if (GVAlignment >= Alignment) {
Alignment = GVAlignment;
} else if (GVAlignment != 0) {
- Alignment = std::min(GVAlignment, getABITypeAlignment(ElemType));
+ 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.
projects / oota-llvm.git / blobdiff