//
// 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.
//
//===----------------------------------------------------------------------===//
//
#include "llvm/Constants.h"
#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringExtras.h"
#include <algorithm>
#include <cstdlib>
// Register the default SparcV9 implementation...
RegisterPass<TargetData> X("targetdata", "Target Data Layout");
}
-
-static inline void getTypeInfoABI(const Type *Ty, const TargetData *TD,
- uint64_t &Size, unsigned char &Alignment);
-
-static inline void getTypeInfoPref(const Type *Ty, const TargetData *TD,
- uint64_t &Size, unsigned char &Alignment);
+char TargetData::ID = 0;
//===----------------------------------------------------------------------===//
// Support for StructLayout
StructLayout::StructLayout(const StructType *ST, const TargetData &TD) {
StructAlignment = 0;
StructSize = 0;
+ NumElements = ST->getNumElements();
// Loop over each of the elements, placing them in memory...
- for (StructType::element_iterator TI = ST->element_begin(),
- TE = ST->element_end(); TI != TE; ++TI) {
- const Type *Ty = *TI;
- unsigned char A;
- unsigned TyAlign;
- uint64_t TySize;
- getTypeInfoABI(Ty, &TD, TySize, A);
- TyAlign = ST->isPacked() ? 1 : A;
-
- // Add padding if necessary to make the data element aligned properly...
- if (StructSize % TyAlign != 0)
- StructSize = (StructSize/TyAlign + 1) * TyAlign; // Add padding...
+ for (unsigned i = 0, e = NumElements; i != e; ++i) {
+ const Type *Ty = ST->getElementType(i);
+ unsigned TyAlign = ST->isPacked() ?
+ 1 : TD.getABITypeAlignment(Ty);
+ uint64_t TySize = ST->isPacked() ?
+ TD.getTypeStoreSize(Ty) : TD.getABITypeSize(Ty);
+
+ // 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);
- MemberOffsets.push_back(StructSize);
+ MemberOffsets[i] = StructSize;
StructSize += TySize; // Consume space for this data item
}
/// getElementContainingOffset - Given a valid offset into the structure,
/// return the structure index that contains it.
unsigned StructLayout::getElementContainingOffset(uint64_t Offset) const {
- std::vector<uint64_t>::const_iterator SI =
- std::upper_bound(MemberOffsets.begin(), MemberOffsets.end(), Offset);
- assert(SI != MemberOffsets.begin() && "Offset not in structure type!");
+ const uint64_t *SI =
+ std::upper_bound(&MemberOffsets[0], &MemberOffsets[NumElements], Offset);
+ assert(SI != &MemberOffsets[0] && "Offset not in structure type!");
--SI;
assert(*SI <= Offset && "upper_bound didn't work");
- assert((SI == MemberOffsets.begin() || *(SI-1) < Offset) &&
- (SI+1 == MemberOffsets.end() || *(SI+1) > Offset) &&
+ assert((SI == &MemberOffsets[0] || *(SI-1) <= Offset) &&
+ (SI+1 == &MemberOffsets[NumElements] || *(SI+1) > Offset) &&
"Upper bound didn't work!");
- return SI-MemberOffsets.begin();
+
+ // 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, TargetAlign support
+//===----------------------------------------------------------------------===//
+
+TargetAlignElem
+TargetAlignElem::get(AlignTypeEnum align_type, unsigned char abi_align,
+ unsigned char pref_align, uint32_t bit_width) {
+ TargetAlignElem retval;
+ retval.AlignType = align_type;
+ retval.ABIAlign = abi_align;
+ retval.PrefAlign = pref_align;
+ retval.TypeBitWidth = bit_width;
+ return retval;
+}
+
+bool
+TargetAlignElem::operator==(const TargetAlignElem &rhs) const {
+ return (AlignType == rhs.AlignType
+ && ABIAlign == rhs.ABIAlign
+ && PrefAlign == rhs.PrefAlign
+ && TypeBitWidth == rhs.TypeBitWidth);
+}
+
+std::ostream &
+TargetAlignElem::dump(std::ostream &os) const {
+ return os << AlignType
+ << TypeBitWidth
+ << ":" << (int) (ABIAlign * 8)
+ << ":" << (int) (PrefAlign * 8);
}
+const TargetAlignElem TargetData::InvalidAlignmentElem =
+ TargetAlignElem::get((AlignTypeEnum) -1, 0, 0, 0);
+
//===----------------------------------------------------------------------===//
// TargetData Class Implementation
//===----------------------------------------------------------------------===//
+/*!
+ A TargetDescription string consists of a sequence of hyphen-delimited
+ specifiers for target endianness, pointer size and alignments, and various
+ primitive type sizes and alignments. A typical string looks something like:
+ <br><br>
+ "E-p:32:32:32-i1:8:8-i8:8:8-i32:32:32-i64:32:64-f32:32:32-f64:32:64"
+ <br><br>
+ (note: this string is not fully specified and is only an example.)
+ \p
+ Alignments come in two flavors: ABI and preferred. ABI alignment (abi_align,
+ below) dictates how a type will be aligned within an aggregate and when used
+ as an argument. Preferred alignment (pref_align, below) determines a type's
+ alignment when emitted as a global.
+ \p
+ Specifier string details:
+ <br><br>
+ <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:@verbatim<size>:<abi_align>:<pref_align>@endverbatim</i>: Pointer size,
+ ABI and preferred alignment.
+ <br><br>
+ <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
+ The default string, fully specified is:
+ <br><br>
+ "E-p:64:64:64-a0:0:0-f32:32:32-f64:0:64"
+ "-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:0:64"
+ "-v64:64:64-v128:128:128"
+ <br><br>
+ Note that in the case of aggregates, 0 is the default ABI and preferred
+ alignment. This is a special case, where the aggregate's computed worst-case
+ alignment will be used.
+ */
void TargetData::init(const std::string &TargetDescription) {
std::string temp = TargetDescription;
LittleEndian = false;
PointerMemSize = 8;
- PointerABIAlignment = 8;
- DoubleABIAlignment = 0;
- FloatABIAlignment = 4;
- LongABIAlignment = 0;
- IntABIAlignment = 4;
- ShortABIAlignment = 2;
- ByteABIAlignment = 1;
- BoolABIAlignment = 1;
- BoolPrefAlignment = BoolABIAlignment;
- BytePrefAlignment = ByteABIAlignment;
- ShortPrefAlignment = ShortABIAlignment;
- IntPrefAlignment = IntABIAlignment;
- LongPrefAlignment = 8;
- FloatPrefAlignment = FloatABIAlignment;
- DoublePrefAlignment = 8;
- PointerPrefAlignment = PointerABIAlignment;
- AggMinPrefAlignment = 0;
-
+ PointerABIAlign = 8;
+ PointerPrefAlign = PointerABIAlign;
+
+ // Default alignments
+ setAlignment(INTEGER_ALIGN, 1, 1, 1); // Bool
+ setAlignment(INTEGER_ALIGN, 1, 1, 8); // Byte
+ setAlignment(INTEGER_ALIGN, 2, 2, 16); // short
+ setAlignment(INTEGER_ALIGN, 4, 4, 32); // int
+ setAlignment(INTEGER_ALIGN, 4, 8, 64); // long
+ setAlignment(FLOAT_ALIGN, 4, 4, 32); // float
+ 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, 8, 0); // struct, union, class, ...
+
while (!temp.empty()) {
std::string token = getToken(temp, "-");
-
- char signal = getToken(token, ":")[0];
-
- switch(signal) {
+ std::string arg0 = getToken(token, ":");
+ const char *p = arg0.c_str();
+ switch(*p) {
case 'E':
LittleEndian = false;
break;
break;
case 'p':
PointerMemSize = atoi(getToken(token,":").c_str()) / 8;
- PointerABIAlignment = atoi(getToken(token,":").c_str()) / 8;
- PointerPrefAlignment = atoi(getToken(token,":").c_str()) / 8;
- if (PointerPrefAlignment == 0)
- PointerPrefAlignment = PointerABIAlignment;
- break;
- case 'd':
- DoubleABIAlignment = atoi(getToken(token,":").c_str()) / 8;
- DoublePrefAlignment = atoi(getToken(token,":").c_str()) / 8;
- if (DoublePrefAlignment == 0)
- DoublePrefAlignment = DoubleABIAlignment;
- break;
- case 'f':
- FloatABIAlignment = atoi(getToken(token, ":").c_str()) / 8;
- FloatPrefAlignment = atoi(getToken(token,":").c_str()) / 8;
- if (FloatPrefAlignment == 0)
- FloatPrefAlignment = FloatABIAlignment;
- break;
- case 'l':
- LongABIAlignment = atoi(getToken(token, ":").c_str()) / 8;
- LongPrefAlignment = atoi(getToken(token,":").c_str()) / 8;
- if (LongPrefAlignment == 0)
- LongPrefAlignment = LongABIAlignment;
+ PointerABIAlign = atoi(getToken(token,":").c_str()) / 8;
+ PointerPrefAlign = atoi(getToken(token,":").c_str()) / 8;
+ if (PointerPrefAlign == 0)
+ PointerPrefAlign = PointerABIAlign;
break;
case 'i':
- IntABIAlignment = atoi(getToken(token, ":").c_str()) / 8;
- IntPrefAlignment = atoi(getToken(token,":").c_str()) / 8;
- if (IntPrefAlignment == 0)
- IntPrefAlignment = IntABIAlignment;
- break;
- case 's':
- ShortABIAlignment = atoi(getToken(token, ":").c_str()) / 8;
- ShortPrefAlignment = atoi(getToken(token,":").c_str()) / 8;
- if (ShortPrefAlignment == 0)
- ShortPrefAlignment = ShortABIAlignment;
- break;
- case 'b':
- ByteABIAlignment = atoi(getToken(token, ":").c_str()) / 8;
- BytePrefAlignment = atoi(getToken(token,":").c_str()) / 8;
- if (BytePrefAlignment == 0)
- BytePrefAlignment = ByteABIAlignment;
- break;
- case 'B':
- BoolABIAlignment = atoi(getToken(token, ":").c_str()) / 8;
- BoolPrefAlignment = atoi(getToken(token,":").c_str()) / 8;
- if (BoolPrefAlignment == 0)
- BoolPrefAlignment = BoolABIAlignment;
- break;
- case 'A':
- AggMinPrefAlignment = atoi(getToken(token,":").c_str()) / 8;
+ case 'v':
+ case 'f':
+ 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);
break;
+ }
default:
break;
}
}
-
- // Unless explicitly specified, the alignments for longs and doubles is
- // capped by pointer size.
- if (LongABIAlignment == 0)
- LongABIAlignment = LongPrefAlignment = PointerMemSize;
- if (DoubleABIAlignment == 0)
- DoubleABIAlignment = DoublePrefAlignment = PointerMemSize;
}
-TargetData::TargetData(const Module *M) {
+TargetData::TargetData(const Module *M)
+ : ImmutablePass((intptr_t)&ID) {
init(M->getDataLayout());
}
-/// Layouts - The lazy cache of structure layout information maintained by
-/// TargetData.
+void
+TargetData::setAlignment(AlignTypeEnum align_type, unsigned char abi_align,
+ 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));
+}
+
+/// 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
+/// TargetData. Note that the struct types must have been free'd before
+/// llvm_shutdown is called (and thus this is deallocated) because all the
+/// targets with cached elements should have been destroyed.
///
-static std::map<std::pair<const TargetData*,const StructType*>,
- StructLayout> *Layouts = 0;
+typedef std::pair<const TargetData*,const StructType*> LayoutKey;
+
+struct DenseMapLayoutKeyInfo {
+ static inline LayoutKey getEmptyKey() { return LayoutKey(0, 0); }
+ static inline LayoutKey getTombstoneKey() {
+ return LayoutKey((TargetData*)(intptr_t)-1, 0);
+ }
+ static unsigned getHashValue(const LayoutKey &Val) {
+ 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; }
+};
+
+typedef DenseMap<LayoutKey, StructLayout*, DenseMapLayoutKeyInfo> LayoutInfoTy;
+static ManagedStatic<LayoutInfoTy> LayoutInfo;
TargetData::~TargetData() {
- if (Layouts) {
+ if (LayoutInfo.isConstructed()) {
// Remove any layouts for this TD.
- std::map<std::pair<const TargetData*,
- const StructType*>, StructLayout>::iterator
- I = Layouts->lower_bound(std::make_pair(this, (const StructType*)0));
- while (I != Layouts->end() && I->first.first == this)
- Layouts->erase(I++);
- if (Layouts->empty()) {
- delete Layouts;
- Layouts = 0;
+ LayoutInfoTy &TheMap = *LayoutInfo;
+ for (LayoutInfoTy::iterator I = TheMap.begin(), E = TheMap.end();
+ I != E; ) {
+ if (I->first.first == this) {
+ I->second->~StructLayout();
+ free(I->second);
+ TheMap.erase(I++);
+ } else {
+ ++I;
+ }
}
}
}
-std::string TargetData::getStringRepresentation() const {
- std::stringstream repr;
+const StructLayout *TargetData::getStructLayout(const StructType *Ty) const {
+ LayoutInfoTy &TheMap = *LayoutInfo;
- if (LittleEndian)
- repr << "e";
- else
- repr << "E";
+ StructLayout *&SL = TheMap[LayoutKey(this, Ty)];
+ if (SL) return SL;
+
+ // Otherwise, create the struct layout. Because it is variable length, we
+ // malloc it, then use placement new.
+ int NumElts = Ty->getNumElements();
+ StructLayout *L =
+ (StructLayout *)malloc(sizeof(StructLayout)+(NumElts-1)*sizeof(uint64_t));
- repr << "-p:" << (PointerMemSize * 8) << ":" << (PointerABIAlignment * 8);
- repr << "-d:" << (DoubleABIAlignment * 8) << ":"
- << (DoublePrefAlignment * 8);
- repr << "-f:" << (FloatABIAlignment * 8) << ":"
- << (FloatPrefAlignment * 8);
- repr << "-l:" << (LongABIAlignment * 8) << ":"
- << (LongPrefAlignment * 8);
- repr << "-i:" << (IntABIAlignment * 8) << ":"
- << (IntPrefAlignment * 8);
- repr << "-s:" << (ShortABIAlignment * 8) << ":"
- << (ShortPrefAlignment * 8);
- repr << "-b:" << (ByteABIAlignment * 8) << ":"
- << (BytePrefAlignment * 8);
- repr << "-B:" << (BoolABIAlignment * 8) << ":"
- << (BoolPrefAlignment * 8);
- repr << "-A:" << (AggMinPrefAlignment * 8);
+ // Set SL before calling StructLayout's ctor. The ctor could cause other
+ // entries to be added to TheMap, invalidating our reference.
+ SL = L;
- return repr.str();
-}
-
-const StructLayout *TargetData::getStructLayout(const StructType *Ty) const {
- if (Layouts == 0)
- Layouts = new std::map<std::pair<const TargetData*,const StructType*>,
- StructLayout>();
- std::map<std::pair<const TargetData*,const StructType*>,
- StructLayout>::iterator
- I = Layouts->lower_bound(std::make_pair(this, Ty));
- if (I != Layouts->end() && I->first.first == this && I->first.second == Ty)
- return &I->second;
- else {
- return &Layouts->insert(I, std::make_pair(std::make_pair(this, Ty),
- StructLayout(Ty, *this)))->second;
- }
+ new (L) StructLayout(Ty, *this);
+ return L;
}
/// InvalidateStructLayoutInfo - TargetData speculatively caches StructLayout
/// 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 (!Layouts) return; // No cache.
-
- std::map<std::pair<const TargetData*,const StructType*>,
- StructLayout>::iterator I = Layouts->find(std::make_pair(this, Ty));
- if (I != Layouts->end())
- Layouts->erase(I);
+ if (!LayoutInfo.isConstructed()) return; // No cache.
+
+ LayoutInfoTy::iterator I = LayoutInfo->find(LayoutKey(this, Ty));
+ if (I != LayoutInfo->end()) {
+ I->second->~StructLayout();
+ free(I->second);
+ LayoutInfo->erase(I);
+ }
}
+std::string TargetData::getStringRepresentation() const {
+ std::string repr;
+ repr.append(LittleEndian ? "e" : "E");
+ repr.append("-p:").append(itostr((int64_t) (PointerMemSize * 8))).
+ append(":").append(itostr((int64_t) (PointerABIAlign * 8))).
+ append(":").append(itostr((int64_t) (PointerPrefAlign * 8)));
+ for (align_const_iterator I = Alignments.begin();
+ I != Alignments.end();
+ ++I) {
+ repr.append("-").append(1, (char) I->AlignType).
+ append(utostr((int64_t) I->TypeBitWidth)).
+ append(":").append(utostr((uint64_t) (I->ABIAlign * 8))).
+ append(":").append(utostr((uint64_t) (I->PrefAlign * 8)));
+ }
+ return repr;
+}
+
-static inline void getTypeInfoABI(const Type *Ty, const TargetData *TD,
- uint64_t &Size, unsigned char &Alignment) {
+uint64_t TargetData::getTypeSizeInBits(const Type *Ty) const {
assert(Ty->isSized() && "Cannot getTypeInfo() on a type that is unsized!");
switch (Ty->getTypeID()) {
- case Type::IntegerTyID: {
- unsigned BitWidth = cast<IntegerType>(Ty)->getBitWidth();
- if (BitWidth <= 8) {
- Size = 1; Alignment = TD->getByteABIAlignment();
- } else if (BitWidth <= 16) {
- Size = 2; Alignment = TD->getShortABIAlignment();
- } else if (BitWidth <= 32) {
- Size = 4; Alignment = TD->getIntABIAlignment();
- } else if (BitWidth <= 64) {
- Size = 8; Alignment = TD->getLongABIAlignment();
- } else
- assert(0 && "Integer types > 64 bits not supported.");
- return;
- }
- case Type::VoidTyID: Size = 1; Alignment = TD->getByteABIAlignment(); return;
- case Type::FloatTyID: Size = 4; Alignment = TD->getFloatABIAlignment(); return;
- case Type::DoubleTyID: Size = 8; Alignment = TD->getDoubleABIAlignment(); return;
case Type::LabelTyID:
case Type::PointerTyID:
- Size = TD->getPointerSize(); Alignment = TD->getPointerABIAlignment();
- return;
+ return getPointerSizeInBits();
case Type::ArrayTyID: {
const ArrayType *ATy = cast<ArrayType>(Ty);
- getTypeInfoABI(ATy->getElementType(), TD, Size, Alignment);
- unsigned AlignedSize = (Size + Alignment - 1)/Alignment*Alignment;
- Size = AlignedSize*ATy->getNumElements();
- return;
- }
- case Type::PackedTyID: {
- const PackedType *PTy = cast<PackedType>(Ty);
- getTypeInfoABI(PTy->getElementType(), TD, Size, Alignment);
- unsigned AlignedSize = (Size + Alignment - 1)/Alignment*Alignment;
- Size = AlignedSize*PTy->getNumElements();
- // FIXME: The alignments of specific packed types are target dependent.
- // For now, just set it to be equal to Size.
- Alignment = Size;
- return;
+ return getABITypeSizeInBits(ATy->getElementType())*ATy->getNumElements();
}
case Type::StructTyID: {
// Get the layout annotation... which is lazily created on demand.
- const StructLayout *Layout = TD->getStructLayout(cast<StructType>(Ty));
- Size = Layout->StructSize; Alignment = Layout->StructAlignment;
- return;
+ const StructLayout *Layout = getStructLayout(cast<StructType>(Ty));
+ return Layout->getSizeInBits();
+ }
+ case Type::IntegerTyID:
+ return cast<IntegerType>(Ty)->getBitWidth();
+ case Type::VoidTyID:
+ return 8;
+ case Type::FloatTyID:
+ return 32;
+ case Type::DoubleTyID:
+ 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();
}
-
default:
- assert(0 && "Bad type for getTypeInfo!!!");
- return;
+ assert(0 && "TargetData::getTypeSizeInBits(): Unsupported type");
+ break;
}
+ return 0;
}
-static inline void getTypeInfoPref(const Type *Ty, const TargetData *TD,
- uint64_t &Size, unsigned char &Alignment) {
- assert(Ty->isSized() && "Cannot getTypeInfoPref() on a type that is unsized!");
+/*!
+ \param abi_or_pref Flag that determines which alignment is returned. true
+ returns the ABI alignment, false returns the preferred alignment.
+ \param Ty The underlying type for which alignment is determined.
+
+ Get the ABI (\a abi_or_pref == true) or preferred alignment (\a abi_or_pref
+ == false) for the requested type \a Ty.
+ */
+unsigned char TargetData::getAlignment(const Type *Ty, bool abi_or_pref) const {
+ int AlignType = -1;
+
+ assert(Ty->isSized() && "Cannot getTypeInfo() on a type that is unsized!");
switch (Ty->getTypeID()) {
- case Type::IntegerTyID: {
- unsigned BitWidth = cast<IntegerType>(Ty)->getBitWidth();
- if (BitWidth <= 8) {
- Size = 1; Alignment = TD->getBytePrefAlignment();
- } else if (BitWidth <= 16) {
- Size = 2; Alignment = TD->getShortPrefAlignment();
- } else if (BitWidth <= 32) {
- Size = 4; Alignment = TD->getIntPrefAlignment();
- } else if (BitWidth <= 64) {
- Size = 8; Alignment = TD->getLongPrefAlignment();
- } else
- assert(0 && "Integer types > 64 bits not supported.");
- return;
+ /* Early escape for the non-numeric types */
+ case Type::LabelTyID:
+ case Type::PointerTyID:
+ return (abi_or_pref
+ ? getPointerABIAlignment()
+ : getPointerPrefAlignment());
+ 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 1;
+
+ // Get the layout annotation... which is lazily created on demand.
+ const StructLayout *Layout = getStructLayout(cast<StructType>(Ty));
+ unsigned Align = getAlignmentInfo(AGGREGATE_ALIGN, 0, abi_or_pref);
+ return std::max(Align, (unsigned)Layout->getAlignment());
}
+ case Type::IntegerTyID:
case Type::VoidTyID:
- Size = 1; Alignment = TD->getBytePrefAlignment();
- return;
+ AlignType = INTEGER_ALIGN;
+ break;
case Type::FloatTyID:
- Size = 4; Alignment = TD->getFloatPrefAlignment();
- return;
case Type::DoubleTyID:
- Size = 8; Alignment = TD->getDoublePrefAlignment();
- return;
- case Type::LabelTyID:
- case Type::PointerTyID:
- Size = TD->getPointerSize(); Alignment = TD->getPointerPrefAlignment();
- return;
- case Type::ArrayTyID: {
- const ArrayType *ATy = cast<ArrayType>(Ty);
- getTypeInfoPref(ATy->getElementType(), TD, Size, Alignment);
- unsigned AlignedSize = (Size + Alignment - 1)/Alignment*Alignment;
- Size = AlignedSize*ATy->getNumElements();
- return;
- }
- case Type::PackedTyID: {
- const PackedType *PTy = cast<PackedType>(Ty);
- getTypeInfoPref(PTy->getElementType(), TD, Size, Alignment);
- unsigned AlignedSize = (Size + Alignment - 1)/Alignment*Alignment;
- Size = AlignedSize*PTy->getNumElements();
- // FIXME: The alignments of specific packed types are target dependent.
- // For now, just set it to be equal to Size.
- Alignment = Size;
- return;
+ // 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: {
+ 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;
}
- case Type::StructTyID: {
- // Get the layout annotation... which is lazily created on demand;
- // enforce minimum aggregate alignment.
- const StructLayout *Layout = TD->getStructLayout(cast<StructType>(Ty));
- Size = Layout->StructSize;
- Alignment = std::max(Layout->StructAlignment,
- (const unsigned int) TD->getAggMinPrefAlignment());
- return;
- }
-
default:
- assert(0 && "Bad type for getTypeInfoPref!!!");
- return;
+ assert(0 && "Bad type for getAlignment!!!");
+ break;
}
-}
-
-uint64_t TargetData::getTypeSize(const Type *Ty) const {
- uint64_t Size;
- unsigned char Align;
- getTypeInfoABI(Ty, this, Size, Align);
- return Size;
+ return getAlignmentInfo((AlignTypeEnum)AlignType, getTypeSizeInBits(Ty),
+ abi_or_pref);
}
-uint64_t TargetData::getTypeSizeInBits(const Type *Ty) const {
- if (Ty->isInteger())
- return cast<IntegerType>(Ty)->getBitWidth();
-
- uint64_t Size;
- unsigned char Align;
- getTypeInfoABI(Ty, this, Size, Align);
- return Size * 8;
+unsigned char TargetData::getABITypeAlignment(const Type *Ty) const {
+ return getAlignment(Ty, true);
}
-unsigned char TargetData::getTypeAlignmentABI(const Type *Ty) const {
- uint64_t Size;
- unsigned char Align;
- getTypeInfoABI(Ty, this, Size, Align);
- return Align;
+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::getTypeAlignmentPref(const Type *Ty) const {
- uint64_t Size;
- unsigned char Align;
- getTypeInfoPref(Ty, this, Size, Align);
- return Align;
+unsigned char TargetData::getPrefTypeAlignment(const Type *Ty) const {
+ return getAlignment(Ty, false);
}
unsigned char TargetData::getPreferredTypeAlignmentShift(const Type *Ty) const {
- unsigned Align = getTypeAlignmentPref(Ty);
+ unsigned Align = (unsigned) 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 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());
}
-uint64_t TargetData::getIndexedOffset(const Type *ptrTy,
- const std::vector<Value*> &Idx) const {
+uint64_t TargetData::getIndexedOffset(const Type *ptrTy, Value* const* Indices,
+ unsigned NumIndices) const {
const Type *Ty = ptrTy;
assert(isa<PointerType>(Ty) && "Illegal argument for getIndexedOffset()");
uint64_t Result = 0;
- generic_gep_type_iterator<std::vector<Value*>::const_iterator>
- TI = gep_type_begin(ptrTy, Idx.begin(), Idx.end());
- for (unsigned CurIDX = 0; CurIDX != Idx.size(); ++CurIDX, ++TI) {
+ 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)) {
- assert(Idx[CurIDX]->getType() == Type::Int32Ty && "Illegal struct idx");
- unsigned FieldNo = cast<ConstantInt>(Idx[CurIDX])->getZExtValue();
+ assert(Indices[CurIDX]->getType() == Type::Int32Ty &&
+ "Illegal struct idx");
+ unsigned FieldNo = cast<ConstantInt>(Indices[CurIDX])->getZExtValue();
// Get structure layout information...
const StructLayout *Layout = getStructLayout(STy);
// Add in the offset, as calculated by the structure layout info...
- assert(FieldNo < Layout->MemberOffsets.size() &&"FieldNo out of range!");
- Result += Layout->MemberOffsets[FieldNo];
+ Result += Layout->getElementOffset(FieldNo);
// Update Ty to refer to current element
Ty = STy->getElementType(FieldNo);
Ty = cast<SequentialType>(Ty)->getElementType();
// Get the array index and the size of each array element.
- int64_t arrayIdx = cast<ConstantInt>(Idx[CurIDX])->getSExtValue();
- Result += arrayIdx * (int64_t)getTypeSize(Ty);
+ int64_t arrayIdx = cast<ConstantInt>(Indices[CurIDX])->getSExtValue();
+ Result += arrayIdx * (int64_t)getABITypeSize(Ty);
}
}
Alignment = Log2_32(GV->getAlignment());
if (GV->hasInitializer()) {
- // Always round up alignment of global doubles to 8 bytes.
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.
}
}
return Alignment;
}
-
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