//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Register the default SparcV9 implementation...
RegisterPass<TargetData> X("targetdata", "Target Data Layout");
}
+char TargetData::ID = 0;
//===----------------------------------------------------------------------===//
// Support for StructLayout
// 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);
- unsigned TyAlign;
- uint64_t TySize;
- TyAlign = (ST->isPacked() ? 1 : TD.getABITypeAlignment(Ty));
- TySize = TD.getTypeSize(Ty);
+ unsigned TyAlign = ST->isPacked() ?
+ 1 : TD.getABITypeAlignment(Ty);
+ uint64_t TySize = ST->isPacked() ?
+ TD.getTypeStoreSize(Ty) : TD.getABITypeSize(Ty);
- // Add padding if necessary to make the data element aligned properly...
- if (StructSize % TyAlign != 0)
- StructSize = (StructSize/TyAlign + 1) * TyAlign; // Add padding...
+ // Add padding if necessary to align the data element properly...
+ StructSize = (StructSize + TyAlign - 1)/TyAlign * TyAlign;
// Keep track of maximum alignment constraint
StructAlignment = std::max(TyAlign, StructAlignment);
assert(SI != &MemberOffsets[0] && "Offset not in structure type!");
--SI;
assert(*SI <= Offset && "upper_bound didn't work");
- assert((SI == &MemberOffsets[0] || *(SI-1) < Offset) &&
+ assert((SI == &MemberOffsets[0] || *(SI-1) <= Offset) &&
(SI+1 == &MemberOffsets[NumElements] || *(SI+1) > Offset) &&
"Upper bound didn't work!");
+
+ // Multiple fields can have the same offset if any of them are zero sized.
+ // For example, in { i32, [0 x i32], i32 }, searching for offset 4 will stop
+ // at the i32 element, because it is the last element at that offset. This is
+ // the right one to return, because anything after it will have a higher
+ // offset, implying that this element is non-empty.
return SI-&MemberOffsets[0];
}
TargetAlignElem
TargetAlignElem::get(AlignTypeEnum align_type, unsigned char abi_align,
- unsigned char pref_align, short bit_width) {
+ unsigned char pref_align, uint32_t bit_width) {
TargetAlignElem retval;
retval.AlignType = align_type;
retval.ABIAlign = abi_align;
return retval;
}
-bool
-TargetAlignElem::operator<(const TargetAlignElem &rhs) const {
- return ((AlignType < rhs.AlignType)
- || (AlignType == rhs.AlignType && TypeBitWidth < rhs.TypeBitWidth));
-}
-
bool
TargetAlignElem::operator==(const TargetAlignElem &rhs) const {
return (AlignType == rhs.AlignType
<i>[E|e]</i>: Endianness. "E" specifies a big-endian target data model, "e"
specifies a little-endian target data model.
<br><br>
- <i>p:<size>:<abi_align>:<pref_align></i>: Pointer size, ABI and preferred
- alignment.
+ <i>p:@verbatim<size>:<abi_align>:<pref_align>@endverbatim</i>: Pointer size,
+ ABI and preferred alignment.
<br><br>
- <i><type><size>:<abi_align>:<pref_align></i>: Numeric type alignment. Type is
+ <i>@verbatim<type><size>:<abi_align>:<pref_align>@endverbatim</i>: Numeric type alignment. Type is
one of <i>i|f|v|a</i>, corresponding to integer, floating point, vector (aka
packed) or aggregate. Size indicates the size, e.g., 32 or 64 bits.
\p
setAlignment(FLOAT_ALIGN, 8, 8, 64); // double
setAlignment(VECTOR_ALIGN, 8, 8, 64); // v2i32
setAlignment(VECTOR_ALIGN, 16, 16, 128); // v16i8, v8i16, v4i32, ...
- setAlignment(AGGREGATE_ALIGN, 0, 0, 0); // struct, union, class, ...
-
+ setAlignment(AGGREGATE_ALIGN, 0, 8, 0); // struct, union, class, ...
+
while (!temp.empty()) {
std::string token = getToken(temp, "-");
-
std::string arg0 = getToken(token, ":");
const char *p = arg0.c_str();
- AlignTypeEnum align_type;
- short size;
- unsigned char abi_align;
- unsigned char pref_align;
-
switch(*p) {
case 'E':
LittleEndian = false;
case 'i':
case 'v':
case 'f':
- case 'a': {
- align_type = (*p == 'i' ? INTEGER_ALIGN :
- (*p == 'f' ? FLOAT_ALIGN :
- (*p == 'v' ? VECTOR_ALIGN : AGGREGATE_ALIGN)));
- size = (short) atoi(++p);
- abi_align = atoi(getToken(token, ":").c_str()) / 8;
- pref_align = atoi(getToken(token, ":").c_str()) / 8;
+ case 'a':
+ case 's': {
+ AlignTypeEnum align_type = STACK_ALIGN; // Dummy init, silence warning
+ switch(*p) {
+ case 'i': align_type = INTEGER_ALIGN; break;
+ case 'v': align_type = VECTOR_ALIGN; break;
+ case 'f': align_type = FLOAT_ALIGN; break;
+ case 'a': align_type = AGGREGATE_ALIGN; break;
+ case 's': align_type = STACK_ALIGN; break;
+ }
+ uint32_t size = (uint32_t) atoi(++p);
+ unsigned char abi_align = atoi(getToken(token, ":").c_str()) / 8;
+ unsigned char pref_align = atoi(getToken(token, ":").c_str()) / 8;
if (pref_align == 0)
pref_align = abi_align;
setAlignment(align_type, abi_align, pref_align, size);
}
}
-TargetData::TargetData(const Module *M) {
+TargetData::TargetData(const Module *M)
+ : ImmutablePass((intptr_t)&ID) {
init(M->getDataLayout());
}
void
TargetData::setAlignment(AlignTypeEnum align_type, unsigned char abi_align,
- unsigned char pref_align, short bit_width) {
- TargetAlignElem elt = TargetAlignElem::get(align_type, abi_align,
- pref_align, bit_width);
- std::pair<align_iterator, align_iterator> ins_result =
- std::equal_range(Alignments.begin(), Alignments.end(), elt);
- align_iterator I = ins_result.first;
- if (I != Alignments.end() && I->AlignType == align_type &&
- I->TypeBitWidth == bit_width) {
- // Update the abi, preferred alignments.
- I->ABIAlign = abi_align;
- I->PrefAlign = pref_align;
- } else
- Alignments.insert(I, elt);
-
-#if 0
- // Keep around for debugging and testing...
- align_iterator E = ins_result.second;
-
- cerr << "setAlignment(" << elt << ")\n";
- cerr << "I = " << (I - Alignments.begin())
- << ", E = " << (E - Alignments.begin()) << "\n";
- std::copy(Alignments.begin(), Alignments.end(),
- std::ostream_iterator<TargetAlignElem>(*cerr, "\n"));
- cerr << "=====\n";
-#endif
+ unsigned char pref_align, uint32_t bit_width) {
+ for (unsigned i = 0, e = Alignments.size(); i != e; ++i) {
+ if (Alignments[i].AlignType == align_type &&
+ Alignments[i].TypeBitWidth == bit_width) {
+ // Update the abi, preferred alignments.
+ Alignments[i].ABIAlign = abi_align;
+ Alignments[i].PrefAlign = pref_align;
+ return;
+ }
+ }
+
+ Alignments.push_back(TargetAlignElem::get(align_type, abi_align,
+ pref_align, bit_width));
}
-const TargetAlignElem &
-TargetData::getAlignment(AlignTypeEnum align_type, short bit_width) const
-{
- std::pair<align_const_iterator, align_const_iterator> find_result =
- std::equal_range(Alignments.begin(), Alignments.end(),
- TargetAlignElem::get(align_type, 0, 0,
- bit_width));
- align_const_iterator I = find_result.first;
-
- // Note: This may not be reasonable if variable-width integer sizes are
- // passed, at which point, more sophisticated searching will need to be done.
- return *I;
+/// getAlignmentInfo - Return the alignment (either ABI if ABIInfo = true or
+/// preferred if ABIInfo = false) the target wants for the specified datatype.
+unsigned TargetData::getAlignmentInfo(AlignTypeEnum AlignType,
+ uint32_t BitWidth, bool ABIInfo) const {
+ // Check to see if we have an exact match and remember the best match we see.
+ int BestMatchIdx = -1;
+ int LargestInt = -1;
+ for (unsigned i = 0, e = Alignments.size(); i != e; ++i) {
+ if (Alignments[i].AlignType == AlignType &&
+ Alignments[i].TypeBitWidth == BitWidth)
+ return ABIInfo ? Alignments[i].ABIAlign : Alignments[i].PrefAlign;
+
+ // The best match so far depends on what we're looking for.
+ if (AlignType == VECTOR_ALIGN && Alignments[i].AlignType == VECTOR_ALIGN) {
+ // If this is a specification for a smaller vector type, we will fall back
+ // to it. This happens because <128 x double> can be implemented in terms
+ // of 64 <2 x double>.
+ if (Alignments[i].TypeBitWidth < BitWidth) {
+ // Verify that we pick the biggest of the fallbacks.
+ if (BestMatchIdx == -1 ||
+ Alignments[BestMatchIdx].TypeBitWidth < Alignments[i].TypeBitWidth)
+ BestMatchIdx = i;
+ }
+ } else if (AlignType == INTEGER_ALIGN &&
+ Alignments[i].AlignType == INTEGER_ALIGN) {
+ // The "best match" for integers is the smallest size that is larger than
+ // the BitWidth requested.
+ if (Alignments[i].TypeBitWidth > BitWidth && (BestMatchIdx == -1 ||
+ Alignments[i].TypeBitWidth < Alignments[BestMatchIdx].TypeBitWidth))
+ BestMatchIdx = i;
+ // However, if there isn't one that's larger, then we must use the
+ // largest one we have (see below)
+ if (LargestInt == -1 ||
+ Alignments[i].TypeBitWidth > Alignments[LargestInt].TypeBitWidth)
+ LargestInt = i;
+ }
+ }
+
+ // For integers, if we didn't find a best match, use the largest one found.
+ if (BestMatchIdx == -1)
+ BestMatchIdx = LargestInt;
+
+ // Okay, we didn't find an exact solution. Fall back here depending on what
+ // is being looked for.
+ assert(BestMatchIdx != -1 && "Didn't find alignment info for this datatype!");
+
+ // Since we got a "best match" index, just return it.
+ return ABIInfo ? Alignments[BestMatchIdx].ABIAlign
+ : Alignments[BestMatchIdx].PrefAlign;
}
/// LayoutInfo - The lazy cache of structure layout information maintained by
return LayoutKey((TargetData*)(intptr_t)-1, 0);
}
static unsigned getHashValue(const LayoutKey &Val) {
- return DenseMapKeyInfo<void*>::getHashValue(Val.first) ^
- DenseMapKeyInfo<void*>::getHashValue(Val.second);
+ return DenseMapInfo<void*>::getHashValue(Val.first) ^
+ DenseMapInfo<void*>::getHashValue(Val.second);
}
+ static bool isEqual(const LayoutKey &LHS, const LayoutKey &RHS) {
+ return LHS == RHS;
+ }
+
static bool isPod() { return true; }
};
// Otherwise, create the struct layout. Because it is variable length, we
// malloc it, then use placement new.
- unsigned NumElts = Ty->getNumElements();
+ int NumElts = Ty->getNumElements();
StructLayout *L =
(StructLayout *)malloc(sizeof(StructLayout)+(NumElts-1)*sizeof(uint64_t));
SL = L;
new (L) StructLayout(Ty, *this);
-
return L;
}
}
-uint64_t TargetData::getTypeSize(const Type *Ty) const {
+uint64_t TargetData::getTypeSizeInBits(const Type *Ty) const {
assert(Ty->isSized() && "Cannot getTypeInfo() on a type that is unsized!");
switch (Ty->getTypeID()) {
case Type::LabelTyID:
case Type::PointerTyID:
- return getPointerSize();
+ return getPointerSizeInBits();
case Type::ArrayTyID: {
const ArrayType *ATy = cast<ArrayType>(Ty);
- uint64_t Size;
- unsigned char Alignment;
- Size = getTypeSize(ATy->getElementType());
- Alignment = getABITypeAlignment(ATy->getElementType());
- unsigned AlignedSize = (Size + Alignment - 1)/Alignment*Alignment;
- return AlignedSize*ATy->getNumElements();
+ return getABITypeSizeInBits(ATy->getElementType())*ATy->getNumElements();
}
case Type::StructTyID: {
// Get the layout annotation... which is lazily created on demand.
const StructLayout *Layout = getStructLayout(cast<StructType>(Ty));
- return Layout->getSizeInBytes();
- }
- case Type::IntegerTyID: {
- unsigned BitWidth = cast<IntegerType>(Ty)->getBitWidth();
- if (BitWidth <= 8) {
- return 1;
- } else if (BitWidth <= 16) {
- return 2;
- } else if (BitWidth <= 32) {
- return 4;
- } else if (BitWidth <= 64) {
- return 8;
- } else
- assert(0 && "Integer types > 64 bits not supported.");
- break;
+ return Layout->getSizeInBits();
}
+ case Type::IntegerTyID:
+ return cast<IntegerType>(Ty)->getBitWidth();
case Type::VoidTyID:
- return 1;
+ return 8;
case Type::FloatTyID:
- return 4;
+ return 32;
case Type::DoubleTyID:
- return 8;
+ return 64;
+ case Type::PPC_FP128TyID:
+ case Type::FP128TyID:
+ return 128;
+ // In memory objects this is always aligned to a higher boundary, but
+ // only 80 bits contain information.
+ case Type::X86_FP80TyID:
+ return 80;
case Type::VectorTyID: {
const VectorType *PTy = cast<VectorType>(Ty);
- return PTy->getBitWidth() / 8;
+ return PTy->getBitWidth();
}
default:
- assert(0 && "TargetData::getTypeSize(): Unsupported type");
+ assert(0 && "TargetData::getTypeSizeInBits(): Unsupported type");
break;
}
return 0;
}
-uint64_t TargetData::getTypeSizeInBits(const Type *Ty) const {
- if (Ty->isInteger())
- return cast<IntegerType>(Ty)->getBitWidth();
- else
- return getTypeSize(Ty) * 8;
-}
-
-
/*!
\param abi_or_pref Flag that determines which alignment is returned. true
returns the ABI alignment, false returns the preferred alignment.
// Get the layout annotation... which is lazily created on demand.
const StructLayout *Layout = getStructLayout(cast<StructType>(Ty));
- const TargetAlignElem &elem = getAlignment(AGGREGATE_ALIGN, 0);
- assert(validAlignment(elem)
- && "Aggregate alignment return invalid in getAlignment");
- unsigned Align = abi_or_pref ? elem.ABIAlign : elem.PrefAlign;
- return Align < Layout->getAlignment() ? Layout->StructAlignment : Align;
+ unsigned Align = getAlignmentInfo(AGGREGATE_ALIGN, 0, abi_or_pref);
+ return std::max(Align, (unsigned)Layout->getAlignment());
}
case Type::IntegerTyID:
case Type::VoidTyID:
break;
case Type::FloatTyID:
case Type::DoubleTyID:
+ // PPC_FP128TyID and FP128TyID have different data contents, but the
+ // same size and alignment, so they look the same here.
+ case Type::PPC_FP128TyID:
+ case Type::FP128TyID:
+ case Type::X86_FP80TyID:
AlignType = FLOAT_ALIGN;
break;
- case Type::VectorTyID:
- AlignType = VECTOR_ALIGN;
+ case Type::VectorTyID: {
+ const VectorType *VTy = cast<VectorType>(Ty);
+ // Degenerate vectors are assumed to be scalar-ized
+ if (VTy->getNumElements() == 1)
+ return getAlignment(VTy->getElementType(), abi_or_pref);
+ else
+ AlignType = VECTOR_ALIGN;
break;
+ }
default:
assert(0 && "Bad type for getAlignment!!!");
break;
}
- const TargetAlignElem &elem = getAlignment((AlignTypeEnum) AlignType,
- getTypeSize(Ty) * 8);
- if (validAlignment(elem))
- return (abi_or_pref ? elem.ABIAlign : elem.PrefAlign);
- else {
- cerr << "TargetData::getAlignment: align type " << AlignType
- << " size " << getTypeSize(Ty) << " not found in Alignments.\n";
- abort();
- /*NOTREACHED*/
- return 0;
- }
+ return getAlignmentInfo((AlignTypeEnum)AlignType, getTypeSizeInBits(Ty),
+ abi_or_pref);
}
unsigned char TargetData::getABITypeAlignment(const Type *Ty) const {
return getAlignment(Ty, true);
}
+unsigned char TargetData::getCallFrameTypeAlignment(const 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 char TargetData::getPrefTypeAlignment(const Type *Ty) const {
return getAlignment(Ty, false);
}
/// getIntPtrType - Return an unsigned integer type that is the same size or
/// greater to the host pointer size.
const Type *TargetData::getIntPtrType() const {
- switch (getPointerSize()) {
- default: assert(0 && "Unknown pointer size!");
- case 2: return Type::Int16Ty;
- case 4: return Type::Int32Ty;
- case 8: return Type::Int64Ty;
- }
+ return IntegerType::get(getPointerSizeInBits());
}
TI = gep_type_begin(ptrTy, Indices, Indices+NumIndices);
for (unsigned CurIDX = 0; CurIDX != NumIndices; ++CurIDX, ++TI) {
if (const StructType *STy = dyn_cast<StructType>(*TI)) {
- assert(Indices[CurIDX]->getType() == Type::Int32Ty &&"Illegal struct idx");
+ assert(Indices[CurIDX]->getType() == Type::Int32Ty &&
+ "Illegal struct idx");
unsigned FieldNo = cast<ConstantInt>(Indices[CurIDX])->getZExtValue();
// Get structure layout information...
// Get the array index and the size of each array element.
int64_t arrayIdx = cast<ConstantInt>(Indices[CurIDX])->getSExtValue();
- Result += arrayIdx * (int64_t)getTypeSize(Ty);
+ Result += arrayIdx * (int64_t)getABITypeSize(Ty);
}
}
if (Alignment < 4) {
// If the global is not external, see if it is large. If so, give it a
// larger alignment.
- if (getTypeSize(ElemType) > 128)
+ if (getTypeSizeInBits(ElemType) > 128)
Alignment = 4; // 16-byte alignment.
}
}
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