#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/System/Mutex.h"
+#include "llvm/Support/Mutex.h"
#include "llvm/ADT/DenseMap.h"
#include <algorithm>
#include <cstdlib>
// Handle the Pass registration stuff necessary to use TargetData's.
// Register the default SparcV9 implementation...
-static RegisterPass<TargetData> X("targetdata", "Target Data Layout", false,
- true);
+INITIALIZE_PASS(TargetData, "targetdata", "Target Data Layout", false, true)
char TargetData::ID = 0;
//===----------------------------------------------------------------------===//
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
//===----------------------------------------------------------------------===//
TargetAlignElem
-TargetAlignElem::get(AlignTypeEnum align_type, unsigned char abi_align,
- unsigned char pref_align, uint32_t bit_width) {
+TargetAlignElem::get(AlignTypeEnum align_type, unsigned abi_align,
+ unsigned pref_align, uint32_t bit_width) {
assert(abi_align <= pref_align && "Preferred alignment worse than ABI!");
TargetAlignElem retval;
retval.AlignType = align_type;
}
void TargetData::init(StringRef Desc) {
+ initializeTargetDataPass(*PassRegistry::getPassRegistry());
+
LayoutMap = 0;
LittleEndian = false;
PointerMemSize = 8;
std::pair<StringRef, StringRef> Split = Desc.split('-');
StringRef Token = Split.first;
Desc = Split.second;
-
+
if (Token.empty())
continue;
-
+
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;
}
unsigned Size = getInt(Specifier.substr(1));
Split = Token.split(':');
- unsigned char ABIAlign = getInt(Split.first) / 8;
-
+ unsigned ABIAlign = getInt(Split.first) / 8;
+
Split = Split.second.split(':');
- unsigned char PrefAlign = getInt(Split.first) / 8;
+ unsigned PrefAlign = getInt(Split.first) / 8;
if (PrefAlign == 0)
PrefAlign = ABIAlign;
setAlignment(AlignType, ABIAlign, PrefAlign, Size);
Token = Split.second;
} while (!Specifier.empty() || !Token.empty());
break;
-
+
default:
break;
}
///
/// @note This has to exist, because this is a pass, but it should never be
/// used.
-TargetData::TargetData() : ImmutablePass(&ID) {
- llvm_report_error("Bad TargetData ctor 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)
- : ImmutablePass(&ID) {
+TargetData::TargetData(const Module *M)
+ : ImmutablePass(ID) {
init(M->getDataLayout());
}
void
-TargetData::setAlignment(AlignTypeEnum align_type, unsigned char abi_align,
- unsigned char pref_align, uint32_t bit_width) {
+TargetData::setAlignment(AlignTypeEnum align_type, unsigned abi_align,
+ unsigned 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 &&
return;
}
}
-
+
Alignments.push_back(TargetAlignElem::get(align_type, abi_align,
pref_align, bit_width));
}
-/// getAlignmentInfo - Return the alignment (either ABI if ABIInfo = true or
+/// 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,
+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.
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) {
+ 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 ||
+ 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 ||
+ if (LargestInt == -1 ||
Alignments[i].TypeBitWidth > Alignments[LargestInt].TypeBitWidth)
LargestInt = i;
}
} else {
assert(AlignType == VECTOR_ALIGN && "Unknown alignment type!");
- // If we didn't find a vector size that is smaller or equal to this type,
- // then we will end up scalarizing this to its element type. Just return
- // the alignment of the element.
- return getAlignment(cast<VectorType>(Ty)->getElementType(), ABIInfo);
+ // 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;
}
}
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.
const StructLayout *TargetData::getStructLayout(const StructType *Ty) const {
if (!LayoutMap)
LayoutMap = new StructLayoutMap();
-
+
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
+ // 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));
-
+
// 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())
/// 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;
OS << '-' << (char)AI.AlignType << AI.TypeBitWidth << ':'
<< AI.ABIAlign*8 << ':' << AI.PrefAlign*8;
}
-
+
if (!LegalIntWidths.empty()) {
OS << "-n" << (unsigned)LegalIntWidths[0];
-
+
for (unsigned i = 1, e = LegalIntWidths.size(); i != e; ++i)
OS << ':' << (unsigned)LegalIntWidths[i];
}
case Type::StructTyID:
// Get the layout annotation... which is lazily created on demand.
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:
case Type::FloatTyID:
return 32;
case Type::DoubleTyID:
+ case Type::X86_MMXTyID:
return 64;
case Type::PPC_FP128TyID:
case Type::FP128TyID:
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 {
+unsigned TargetData::getAlignment(const Type *Ty, bool abi_or_pref) const {
int AlignType = -1;
assert(Ty->isSized() && "Cannot getTypeInfo() on a type that is unsized!");
// 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;
+ return std::max(Align, Layout->getAlignment());
}
case Type::IntegerTyID:
case Type::VoidTyID:
case Type::X86_FP80TyID:
AlignType = FLOAT_ALIGN;
break;
+ case Type::X86_MMXTyID:
case Type::VectorTyID:
AlignType = VECTOR_ALIGN;
break;
abi_or_pref, Ty);
}
-unsigned char TargetData::getABITypeAlignment(const Type *Ty) const {
+unsigned TargetData::getABITypeAlignment(const Type *Ty) const {
return getAlignment(Ty, true);
}
/// getABIIntegerTypeAlignment - Return the minimum ABI-required alignment for
/// an integer type of the specified bitwidth.
-unsigned char TargetData::getABIIntegerTypeAlignment(unsigned BitWidth) const {
+unsigned TargetData::getABIIntegerTypeAlignment(unsigned BitWidth) const {
return getAlignmentInfo(INTEGER_ALIGN, BitWidth, true, 0);
}
-unsigned char TargetData::getCallFrameTypeAlignment(const Type *Ty) const {
+unsigned 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 {
+unsigned TargetData::getPrefTypeAlignment(const Type *Ty) const {
return getAlignment(Ty, false);
}
-unsigned char TargetData::getPreferredTypeAlignmentShift(const Type *Ty) const {
- unsigned Align = (unsigned) getPrefTypeAlignment(Ty);
+unsigned TargetData::getPreferredTypeAlignmentShift(const Type *Ty) const {
+ unsigned Align = getPrefTypeAlignment(Ty);
assert(!(Align & (Align-1)) && "Alignment is not a power of two!");
return Log2_32(Align);
}
// 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)getTypeAllocSize(Ty);
+ if (int64_t arrayIdx = cast<ConstantInt>(Indices[CurIDX])->getSExtValue())
+ Result += (uint64_t)arrayIdx * getTypeAllocSize(Ty);
}
}
unsigned TargetData::getPreferredAlignment(const GlobalVariable *GV) const {
const Type *ElemType = GV->getType()->getElementType();
unsigned Alignment = getPrefTypeAlignment(ElemType);
- if (GV->getAlignment() > Alignment)
- Alignment = GV->getAlignment();
+ unsigned GVAlignment = GV->getAlignment();
+ if (GVAlignment >= Alignment) {
+ Alignment = GVAlignment;
+ } else if (GVAlignment != 0) {
+ Alignment = std::max(GVAlignment, getABITypeAlignment(ElemType));
+ }
- if (GV->hasInitializer()) {
+ if (GV->hasInitializer() && GVAlignment == 0) {
if (Alignment < 16) {
// If the global is not external, see if it is large. If so, give it a
// larger alignment.
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