#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/System/Mutex.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringExtras.h"
#include <algorithm>
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", false,
- true);
-}
+
+// Register the default SparcV9 implementation...
+static RegisterPass<TargetData> X("targetdata", "Target Data Layout", false,
+ true);
char TargetData::ID = 0;
//===----------------------------------------------------------------------===//
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 TyAlign = ST->isPacked() ?
- 1 : TD.getABITypeAlignment(Ty);
- uint64_t TySize = ST->isPacked() ?
- TD.getTypeStoreSize(Ty) : TD.getABITypeSize(Ty);
+ unsigned TyAlign = ST->isPacked() ? 1 : TD.getABITypeAlignment(Ty);
- // Add padding if necessary to align the data element properly...
- StructSize = (StructSize + TyAlign - 1)/TyAlign * TyAlign;
+ // 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);
}
<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.
+ one of <i>i|f|v|a</i>, corresponding to integer, floating point, vector, or
+ aggregate. Size indicates the size, e.g., 32 or 64 bits.
\p
- The default string, fully specified is:
+ 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"
+ "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64"
+ "-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64"
"-v64:64:64-v128:128:128"
<br><br>
Note that in the case of aggregates, 0 is the default ABI and preferred
void TargetData::init(const std::string &TargetDescription) {
std::string temp = TargetDescription;
+ LayoutMap = 0;
LittleEndian = false;
PointerMemSize = 8;
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(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
+ setAlignment(VECTOR_ALIGN, 8, 8, 64); // v2i32, v1i64, ...
setAlignment(VECTOR_ALIGN, 16, 16, 128); // v16i8, v8i16, v4i32, ...
- setAlignment(AGGREGATE_ALIGN, 0, 8, 0); // struct, union, class, ...
+ setAlignment(AGGREGATE_ALIGN, 0, 8, 0); // struct
while (!temp.empty()) {
std::string token = getToken(temp, "-");
}
TargetData::TargetData(const Module *M)
- : ImmutablePass((intptr_t)&ID) {
+ : ImmutablePass(&ID) {
init(M->getDataLayout());
}
BestMatchIdx = LargestInt;
} 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);
- }
+ }
}
-
+
// 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.
-///
-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;
-
+typedef DenseMap<const StructType*, StructLayout*>LayoutInfoTy;
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;
- }
- }
+ if (!LayoutMap)
+ return;
+
+ // Remove any layouts for this TD.
+ LayoutInfoTy &TheMap = *static_cast<LayoutInfoTy*>(LayoutMap);
+ for (LayoutInfoTy::iterator I = TheMap.begin(), E = TheMap.end(); I != E; ) {
+ I->second->~StructLayout();
+ free(I->second);
+ TheMap.erase(I++);
}
+
+ delete static_cast<LayoutInfoTy*>(LayoutMap);
}
const StructLayout *TargetData::getStructLayout(const StructType *Ty) const {
- LayoutInfoTy &TheMap = *LayoutInfo;
+ if (!LayoutMap)
+ LayoutMap = static_cast<void*>(new LayoutInfoTy());
- StructLayout *&SL = TheMap[LayoutKey(this, Ty)];
+ LayoutInfoTy &TheMap = *static_cast<LayoutInfoTy*>(LayoutMap);
+
+ StructLayout *&SL = TheMap[Ty];
if (SL) return SL;
// Otherwise, create the struct layout. Because it is variable length, we
/// 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);
- }
+ LayoutInfoTy* LayoutInfo = static_cast<LayoutInfoTy*>(LayoutMap);
+ LayoutInfoTy::iterator I = LayoutInfo->find(Ty);
+ if (I == LayoutInfo->end()) return;
+
+ I->second->~StructLayout();
+ free(I->second);
+ LayoutInfo->erase(I);
}
return getPointerSizeInBits();
case Type::ArrayTyID: {
const ArrayType *ATy = cast<ArrayType>(Ty);
- return getABITypeSizeInBits(ATy->getElementType())*ATy->getNumElements();
+ 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 = getStructLayout(cast<StructType>(Ty));
- return Layout->getSizeInBits();
- }
+ return getStructLayout(cast<StructType>(Ty))->getSizeInBits();
case Type::IntegerTyID:
return cast<IntegerType>(Ty)->getBitWidth();
case Type::VoidTyID:
// only 80 bits contain information.
case Type::X86_FP80TyID:
return 80;
- case Type::VectorTyID: {
- const VectorType *PTy = cast<VectorType>(Ty);
- return PTy->getBitWidth();
- }
+ case Type::VectorTyID:
+ return cast<VectorType>(Ty)->getBitWidth();
default:
- assert(0 && "TargetData::getTypeSizeInBits(): Unsupported type");
+ llvm_unreachable("TargetData::getTypeSizeInBits(): Unsupported type");
break;
}
return 0;
assert(Ty->isSized() && "Cannot getTypeInfo() on a type that is unsized!");
switch (Ty->getTypeID()) {
- /* Early escape for the non-numeric types */
+ // Early escape for the non-numeric types.
case Type::LabelTyID:
case Type::PointerTyID:
return (abi_or_pref
: 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, Ty);
AlignType = VECTOR_ALIGN;
break;
default:
- assert(0 && "Bad type for getAlignment!!!");
+ llvm_unreachable("Bad type for getAlignment!!!");
break;
}
/// getIntPtrType - Return an unsigned integer type that is the same size or
/// greater to the host pointer size.
-const Type *TargetData::getIntPtrType() const {
- return IntegerType::get(getPointerSizeInBits());
+const IntegerType *TargetData::getIntPtrType(LLVMContext &C) const {
+ return IntegerType::get(C, 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 &&
+ assert(Indices[CurIDX]->getType() ==
+ Type::getInt32Ty(ptrTy->getContext()) &&
"Illegal struct idx");
unsigned FieldNo = cast<ConstantInt>(Indices[CurIDX])->getZExtValue();
// Get the array index and the size of each array element.
int64_t arrayIdx = cast<ConstantInt>(Indices[CurIDX])->getSExtValue();
- Result += arrayIdx * (int64_t)getABITypeSize(Ty);
+ Result += arrayIdx * (int64_t)getTypeAllocSize(Ty);
}
}
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