//
// 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/Target/TargetData.h"
-#include "llvm/Module.h"
-#include "llvm/DerivedTypes.h"
#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Module.h"
#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/System/Mutex.h"
#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/StringExtras.h"
#include <algorithm>
#include <cstdlib>
-#include <sstream>
using namespace llvm;
// Handle the Pass registration stuff necessary to use TargetData's.
-namespace {
- // 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);
+// Register the default SparcV9 implementation...
+static RegisterPass<TargetData> X("targetdata", "Target Data Layout", false,
+ true);
+char TargetData::ID = 0;
//===----------------------------------------------------------------------===//
// Support for StructLayout
StructSize = 0;
NumElements = ST->getNumElements();
- // Loop over each of the elements, placing them in memory...
+ // 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 char A;
- unsigned TyAlign;
- uint64_t TySize;
- getTypeInfoABI(Ty, &TD, TySize, A);
- TyAlign = ST->isPacked() ? 1 : A;
+ unsigned TyAlign = ST->isPacked() ? 1 : TD.getABITypeAlignment(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.
+ if ((StructSize & (TyAlign-1)) != 0)
+ StructSize = TargetData::RoundUpAlignment(StructSize, TyAlign);
- // Keep track of maximum alignment constraint
+ // Keep track of maximum alignment constraint.
StructAlignment = std::max(TyAlign, StructAlignment);
MemberOffsets[i] = StructSize;
- StructSize += TySize; // Consume space for this data item
+ StructSize += TD.getTypeAllocSize(Ty); // Consume space for this data item
}
// Empty structures have alignment of 1 byte.
// Add padding to the end of the struct so that it could be put in an array
// and all array elements would be aligned correctly.
- if (StructSize % StructAlignment != 0)
- StructSize = (StructSize/StructAlignment + 1) * StructAlignment;
+ if ((StructSize & (StructAlignment-1)) != 0)
+ StructSize = TargetData::RoundUpAlignment(StructSize, 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, TargetAlign support
+//===----------------------------------------------------------------------===//
+
+TargetAlignElem
+TargetAlignElem::get(AlignTypeEnum align_type, unsigned char abi_align,
+ unsigned char pref_align, uint32_t bit_width) {
+ assert(abi_align <= pref_align && "Preferred alignment worse than ABI!");
+ 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);
+}
+
+const TargetAlignElem TargetData::InvalidAlignmentElem =
+ TargetAlignElem::get((AlignTypeEnum) -1, 0, 0, 0);
+
//===----------------------------------------------------------------------===//
// TargetData Class Implementation
//===----------------------------------------------------------------------===//
-void TargetData::init(const std::string &TargetDescription) {
- std::string temp = TargetDescription;
-
+/// getInt - Get an integer ignoring errors.
+static unsigned getInt(StringRef R) {
+ unsigned Result = 0;
+ R.getAsInteger(10, Result);
+ return Result;
+}
+
+void TargetData::init(StringRef Desc) {
+ LayoutMap = 0;
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;
-
- while (!temp.empty()) {
- std::string token = getToken(temp, "-");
+ PointerABIAlign = 8;
+ PointerPrefAlign = PointerABIAlign;
+
+ // Default alignments
+ setAlignment(INTEGER_ALIGN, 1, 1, 1); // i1
+ setAlignment(INTEGER_ALIGN, 1, 1, 8); // i8
+ setAlignment(INTEGER_ALIGN, 2, 2, 16); // i16
+ setAlignment(INTEGER_ALIGN, 4, 4, 32); // i32
+ setAlignment(INTEGER_ALIGN, 4, 8, 64); // i64
+ setAlignment(FLOAT_ALIGN, 4, 4, 32); // float
+ setAlignment(FLOAT_ALIGN, 8, 8, 64); // double
+ setAlignment(VECTOR_ALIGN, 8, 8, 64); // v2i32, v1i64, ...
+ setAlignment(VECTOR_ALIGN, 16, 16, 128); // v16i8, v8i16, v4i32, ...
+ setAlignment(AGGREGATE_ALIGN, 0, 8, 0); // struct
+
+ while (!Desc.empty()) {
+ std::pair<StringRef, StringRef> Split = Desc.split('-');
+ StringRef Token = Split.first;
+ Desc = Split.second;
- char signal = getToken(token, ":")[0];
+ if (Token.empty())
+ continue;
- switch(signal) {
+ Split = Token.split(':');
+ StringRef Specifier = Split.first;
+ Token = Split.second;
+
+ assert(!Specifier.empty() && "Can't be empty here");
+
+ switch (Specifier[0]) {
case 'E':
LittleEndian = false;
break;
LittleEndian = true;
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;
+ Split = Token.split(':');
+ PointerMemSize = getInt(Split.first) / 8;
+ Split = Split.second.split(':');
+ PointerABIAlign = getInt(Split.first) / 8;
+ Split = Split.second.split(':');
+ PointerPrefAlign = getInt(Split.first) / 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;
+ case 'v':
+ case 'f':
+ case 'a':
+ case 's': {
+ AlignTypeEnum AlignType;
+ switch (Specifier[0]) {
+ default:
+ case 'i': AlignType = INTEGER_ALIGN; break;
+ case 'v': AlignType = VECTOR_ALIGN; break;
+ case 'f': AlignType = FLOAT_ALIGN; break;
+ case 'a': AlignType = AGGREGATE_ALIGN; break;
+ case 's': AlignType = STACK_ALIGN; break;
+ }
+ unsigned Size = getInt(Specifier.substr(1));
+ Split = Token.split(':');
+ unsigned char ABIAlign = getInt(Split.first) / 8;
+
+ Split = Split.second.split(':');
+ unsigned char PrefAlign = getInt(Split.first) / 8;
+ if (PrefAlign == 0)
+ PrefAlign = ABIAlign;
+ setAlignment(AlignType, ABIAlign, PrefAlign, Size);
break;
- case 'A':
- AggMinPrefAlignment = atoi(getToken(token,":").c_str()) / 8;
+ }
+ case 'n': // Native integer types.
+ Specifier = Specifier.substr(1);
+ do {
+ if (unsigned Width = getInt(Specifier))
+ LegalIntWidths.push_back(Width);
+ Split = Token.split(':');
+ Specifier = Split.first;
+ Token = Split.second;
+ } while (!Specifier.empty() || !Token.empty());
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;
+/// Default ctor.
+///
+/// @note This has to exist, because this is a pass, but it should never be
+/// used.
+TargetData::TargetData() : ImmutablePass(&ID) {
+ report_fatal_error("Bad TargetData ctor used. "
+ "Tool did not specify a TargetData to use?");
}
-TargetData::TargetData(const Module *M) {
+TargetData::TargetData(const Module *M)
+ : ImmutablePass(&ID) {
init(M->getDataLayout());
}
-/// 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.
-///
-typedef std::pair<const TargetData*,const StructType*> LayoutKey;
+void
+TargetData::setAlignment(AlignTypeEnum align_type, unsigned char abi_align,
+ unsigned char pref_align, uint32_t bit_width) {
+ assert(abi_align <= pref_align && "Preferred alignment worse than ABI!");
+ 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));
+}
-struct DenseMapLayoutKeyInfo {
- static inline LayoutKey getEmptyKey() { return LayoutKey(0, 0); }
- static inline LayoutKey getTombstoneKey() {
- return LayoutKey((TargetData*)(intptr_t)-1, 0);
+/// 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 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;
+ 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 == 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;
+ }
}
- static unsigned getHashValue(const LayoutKey &Val) {
- return DenseMapKeyInfo<void*>::getHashValue(Val.first) ^
- DenseMapKeyInfo<void*>::getHashValue(Val.second);
+
+ // Okay, we didn't find an exact solution. Fall back here depending on what
+ // is being looked for.
+ if (BestMatchIdx == -1) {
+ // If we didn't find an integer alignment, fall back on most conservative.
+ if (AlignType == INTEGER_ALIGN) {
+ BestMatchIdx = LargestInt;
+ } else {
+ assert(AlignType == VECTOR_ALIGN && "Unknown alignment type!");
+
+ // By default, use natural alignment for vector types. This is consistent
+ // with what clang and llvm-gcc do.
+ unsigned Align = getTypeAllocSize(cast<VectorType>(Ty)->getElementType());
+ Align *= cast<VectorType>(Ty)->getNumElements();
+ // 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);
+ return Align;
+ }
}
- static bool isPod() { return true; }
-};
-typedef DenseMap<LayoutKey, StructLayout*, DenseMapLayoutKeyInfo> LayoutInfoTy;
-static ManagedStatic<LayoutInfoTy> LayoutInfo;
+ // Since we got a "best match" index, just return it.
+ return ABIInfo ? Alignments[BestMatchIdx].ABIAlign
+ : Alignments[BestMatchIdx].PrefAlign;
+}
+namespace {
-TargetData::~TargetData() {
- if (LayoutInfo.isConstructed()) {
- // Remove any layouts for this TD.
- 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;
- }
+class StructLayoutMap : public AbstractTypeUser {
+ typedef DenseMap<const 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;
+ 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) {
+ return LayoutInfo[STy];
+ }
+
+ // for debugging...
+ virtual void dump() const {}
+};
+
+} // end anonymous namespace
+
+TargetData::~TargetData() {
+ delete static_cast<StructLayoutMap*>(LayoutMap);
}
const StructLayout *TargetData::getStructLayout(const StructType *Ty) const {
- LayoutInfoTy &TheMap = *LayoutInfo;
+ if (!LayoutMap)
+ LayoutMap = new StructLayoutMap();
- StructLayout *&SL = TheMap[LayoutKey(this, Ty)];
+ StructLayoutMap *STM = static_cast<StructLayoutMap*>(LayoutMap);
+ StructLayout *&SL = (*STM)[Ty];
if (SL) return SL;
// 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));
+ (StructLayout *)malloc(sizeof(StructLayout)+(NumElts-1) * sizeof(uint64_t));
// Set SL before calling StructLayout's ctor. The ctor could cause other
// entries to be added to TheMap, invalidating our reference.
SL = L;
new (L) StructLayout(Ty, *this);
-
+
+ if (Ty->isAbstract())
+ Ty->addAbstractTypeUser(STM);
+
return L;
}
/// 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 (!LayoutInfo.isConstructed()) return; // No cache.
+ if (!LayoutMap) return; // No cache.
- LayoutInfoTy::iterator I = LayoutInfo->find(LayoutKey(this, Ty));
- if (I != LayoutInfo->end()) {
- I->second->~StructLayout();
- free(I->second);
- LayoutInfo->erase(I);
- }
+ static_cast<StructLayoutMap*>(LayoutMap)->InvalidateEntry(Ty);
}
-
std::string TargetData::getStringRepresentation() const {
- std::stringstream repr;
-
- if (LittleEndian)
- repr << "e";
- else
- repr << "E";
+ std::string Result;
+ raw_string_ostream OS(Result);
- 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);
+ OS << (LittleEndian ? "e" : "E")
+ << "-p:" << PointerMemSize*8 << ':' << PointerABIAlign*8
+ << ':' << PointerPrefAlign*8;
+ for (unsigned i = 0, e = Alignments.size(); i != e; ++i) {
+ const TargetAlignElem &AI = Alignments[i];
+ OS << '-' << (char)AI.AlignType << AI.TypeBitWidth << ':'
+ << AI.ABIAlign*8 << ':' << AI.PrefAlign*8;
+ }
- return repr.str();
+ if (!LegalIntWidths.empty()) {
+ OS << "-n" << (unsigned)LegalIntWidths[0];
+
+ for (unsigned i = 1, e = LegalIntWidths.size(); i != e; ++i)
+ OS << ':' << (unsigned)LegalIntWidths[i];
+ }
+ return OS.str();
}
-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 {
- Size = ((BitWidth + 7) / 8) & ~1;
- Alignment = TD->getLongABIAlignment();
- }
- 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 getTypeAllocSizeInBits(ATy->getElementType())*ATy->getNumElements();
}
- case Type::StructTyID: {
+ case Type::StructTyID:
// Get the layout annotation... which is lazily created on demand.
- const StructLayout *Layout = TD->getStructLayout(cast<StructType>(Ty));
- Size = Layout->getSizeInBytes(); Alignment = Layout->getAlignment();
- return;
+ return getStructLayout(cast<StructType>(Ty))->getSizeInBits();
+ case Type::UnionTyID: {
+ const UnionType *UnTy = cast<UnionType>(Ty);
+ uint64_t Size = 0;
+ for (UnionType::element_iterator i = UnTy->element_begin(),
+ e = UnTy->element_end(); i != e; ++i) {
+ Size = std::max(Size, getTypeSizeInBits(*i));
+ }
+ return Size;
}
-
+ 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:
+ return cast<VectorType>(Ty)->getBitWidth();
default:
- assert(0 && "Bad type for getTypeInfo!!!");
- return;
+ llvm_unreachable("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;
- }
- case Type::VoidTyID:
- Size = 1; Alignment = TD->getBytePrefAlignment();
- return;
- case Type::FloatTyID:
- Size = 4; Alignment = TD->getFloatPrefAlignment();
- return;
- case Type::DoubleTyID:
- Size = 8; Alignment = TD->getDoublePrefAlignment();
- return;
+ // Early escape for the non-numeric types.
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;
- }
+ return (abi_or_pref
+ ? getPointerABIAlignment()
+ : getPointerPrefAlignment());
+ case Type::ArrayTyID:
+ return getAlignment(cast<ArrayType>(Ty)->getElementType(), abi_or_pref);
+
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->getSizeInBytes();
- Alignment = std::max(Layout->getAlignment(),
- (const unsigned int)TD->getAggMinPrefAlignment());
- return;
- }
+ // 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, Ty);
+ return std::max(Align, (unsigned)Layout->getAlignment());
+ }
+ case Type::UnionTyID: {
+ const UnionType *UnTy = cast<UnionType>(Ty);
+ unsigned Align = 1;
+
+ // Unions need the maximum alignment of all their entries
+ for (UnionType::element_iterator i = UnTy->element_begin(),
+ e = UnTy->element_end(); i != e; ++i) {
+ Align = std::max(Align, (unsigned)getAlignment(*i, abi_or_pref));
+ }
+ return Align;
+ }
+ case Type::IntegerTyID:
+ case Type::VoidTyID:
+ AlignType = INTEGER_ALIGN;
+ 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;
+ break;
default:
- assert(0 && "Bad type for getTypeInfoPref!!!");
- return;
+ llvm_unreachable("Bad type for getAlignment!!!");
+ break;
}
+
+ return getAlignmentInfo((AlignTypeEnum)AlignType, getTypeSizeInBits(Ty),
+ abi_or_pref, Ty);
}
+unsigned char TargetData::getABITypeAlignment(const Type *Ty) const {
+ return getAlignment(Ty, true);
+}
-uint64_t TargetData::getTypeSize(const Type *Ty) const {
- uint64_t Size;
- unsigned char Align;
- getTypeInfoABI(Ty, this, Size, Align);
- return Size;
+/// getABIIntegerTypeAlignment - Return the minimum ABI-required alignment for
+/// an integer type of the specified bitwidth.
+unsigned char TargetData::getABIIntegerTypeAlignment(unsigned BitWidth) const {
+ return getAlignmentInfo(INTEGER_ALIGN, BitWidth, true, 0);
}
-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::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;
-unsigned char TargetData::getTypeAlignmentABI(const Type *Ty) const {
- uint64_t Size;
- unsigned char Align;
- getTypeInfoABI(Ty, this, Size, Align);
- return Align;
+ 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;
- }
+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;
- assert(isa<PointerType>(Ty) && "Illegal argument for getIndexedOffset()");
+ 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)) {
- assert(Indices[CurIDX]->getType() == Type::Int32Ty &&"Illegal struct idx");
+ assert(Indices[CurIDX]->getType() ==
+ Type::getInt32Ty(ptrTy->getContext()) &&
+ "Illegal struct idx");
unsigned FieldNo = cast<ConstantInt>(Indices[CurIDX])->getZExtValue();
// Get structure layout information...
// Update Ty to refer to current element
Ty = STy->getElementType(FieldNo);
+ } else if (const UnionType *UnTy = dyn_cast<UnionType>(*TI)) {
+ unsigned FieldNo = cast<ConstantInt>(Indices[CurIDX])->getZExtValue();
+
+ // Offset into union is canonically 0, but type changes
+ Ty = UnTy->getElementType(FieldNo);
} else {
// Update Ty to refer to current element
Ty = cast<SequentialType>(Ty)->getElementType();
// 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);
+ if (int64_t arrayIdx = cast<ConstantInt>(Indices[CurIDX])->getSExtValue())
+ Result += arrayIdx * (int64_t)getTypeAllocSize(Ty);
}
}
return Result;
}
-/// getPreferredAlignmentLog - Return the preferred alignment of the
-/// specified global, returned in log form. This includes an explicitly
-/// requested alignment (if the global has one).
-unsigned TargetData::getPreferredAlignmentLog(const GlobalVariable *GV) const {
+/// getPreferredAlignment - Return the preferred alignment of the specified
+/// 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();
- unsigned Alignment = getPreferredTypeAlignmentShift(ElemType);
- if (GV->getAlignment() > (1U << Alignment))
- Alignment = Log2_32(GV->getAlignment());
-
+ unsigned Alignment = getPrefTypeAlignment(ElemType);
+ if (GV->getAlignment() > Alignment)
+ Alignment = GV->getAlignment();
+
if (GV->hasInitializer()) {
- if (Alignment < 4) {
+ if (Alignment < 16) {
// If the global is not external, see if it is large. If so, give it a
// larger alignment.
- if (getTypeSize(ElemType) > 128)
- Alignment = 4; // 16-byte alignment.
+ if (getTypeSizeInBits(ElemType) > 128)
+ Alignment = 16; // 16-byte alignment.
}
}
return Alignment;
}
+/// getPreferredAlignmentLog - Return the preferred alignment of the
+/// specified global, returned in log form. This includes an explicitly
+/// requested alignment (if the global has one).
+unsigned TargetData::getPreferredAlignmentLog(const GlobalVariable *GV) const {
+ return Log2_32(getPreferredAlignment(GV));
+}
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