#include "llvm/Constants.h"
#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "llvm/Support/MathExtras.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.
// TargetData Class Implementation
//===----------------------------------------------------------------------===//
-TargetData::TargetData(const std::string &TargetName,
- bool isLittleEndian, unsigned char PtrSize,
- unsigned char PtrAl, unsigned char DoubleAl,
- unsigned char FloatAl, unsigned char LongAl,
- unsigned char IntAl, unsigned char ShortAl,
- unsigned char ByteAl, unsigned char BoolAl) {
-
- // If this assert triggers, a pass "required" TargetData information, but the
- // top level tool did not provide one for it. We do not want to default
- // construct, or else we might end up using a bad endianness or pointer size!
- //
- assert(!TargetName.empty() &&
- "ERROR: Tool did not specify a target data to use!");
-
- LittleEndian = isLittleEndian;
- PointerSize = PtrSize;
- PointerAlignment = PtrAl;
- DoubleAlignment = DoubleAl;
- FloatAlignment = FloatAl;
- LongAlignment = LongAl;
- IntAlignment = IntAl;
- ShortAlignment = ShortAl;
- ByteAlignment = ByteAl;
- BoolAlignment = BoolAl;
+void TargetData::init(const std::string &TargetDescription) {
+ std::string temp = TargetDescription;
+
+ LittleEndian = false;
+ PointerSize = 8;
+ PointerAlignment = 8;
+ DoubleAlignment = 8;
+ FloatAlignment = 4;
+ LongAlignment = 8;
+ IntAlignment = 4;
+ ShortAlignment = 2;
+ ByteAlignment = 1;
+ BoolAlignment = 1;
+
+ while (!temp.empty()) {
+ std::string token = getToken(temp, "-");
+
+ char signal = getToken(token, ":")[0];
+
+ switch(signal) {
+ case 'E':
+ LittleEndian = false;
+ break;
+ case 'e':
+ LittleEndian = true;
+ break;
+ case 'p':
+ PointerSize = atoi(getToken(token,":").c_str()) / 8;
+ PointerAlignment = atoi(getToken(token,":").c_str()) / 8;
+ break;
+ case 'd':
+ DoubleAlignment = atoi(getToken(token,":").c_str()) / 8;
+ break;
+ case 'f':
+ FloatAlignment = atoi(getToken(token, ":").c_str()) / 8;
+ break;
+ case 'l':
+ LongAlignment = atoi(getToken(token, ":").c_str()) / 8;
+ break;
+ case 'i':
+ IntAlignment = atoi(getToken(token, ":").c_str()) / 8;
+ break;
+ case 's':
+ ShortAlignment = atoi(getToken(token, ":").c_str()) / 8;
+ break;
+ case 'b':
+ ByteAlignment = atoi(getToken(token, ":").c_str()) / 8;
+ break;
+ case 'B':
+ BoolAlignment = atoi(getToken(token, ":").c_str()) / 8;
+ break;
+ default:
+ break;
+ }
+ }
}
-TargetData::TargetData(const std::string &ToolName, const Module *M) {
+TargetData::TargetData(const Module *M) {
LittleEndian = M->getEndianness() != Module::BigEndian;
PointerSize = M->getPointerSize() != Module::Pointer64 ? 4 : 8;
PointerAlignment = PointerSize;
}
}
+std::string TargetData::getStringRepresentation() const {
+ std::stringstream repr;
+
+ if (LittleEndian)
+ repr << "e";
+ else
+ repr << "E";
+
+ repr << "-p:" << (PointerSize * 8) << ":" << (PointerAlignment * 8);
+ repr << "-d:64:" << (DoubleAlignment * 8);
+ repr << "-f:32:" << (FloatAlignment * 8);
+ repr << "-l:64:" << (LongAlignment * 8);
+ repr << "-i:32:" << (IntAlignment * 8);
+ repr << "-s:16:" << (ShortAlignment * 8);
+ repr << "-b:8:" << (ByteAlignment * 8);
+ repr << "-B:8:" << (BoolAlignment * 8);
+
+ return repr.str();
+}
+
const StructLayout *TargetData::getStructLayout(const StructType *Ty) const {
if (Layouts == 0)
Layouts = new std::map<std::pair<const TargetData*,const StructType*>,
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+7)/8;
+ Alignment = Size;
return;
}
case Type::StructTyID: {
for (unsigned CurIDX = 0; CurIDX != Idx.size(); ++CurIDX, ++TI) {
if (const StructType *STy = dyn_cast<StructType>(*TI)) {
assert(Idx[CurIDX]->getType() == Type::UIntTy && "Illegal struct idx");
- unsigned FieldNo = cast<ConstantUInt>(Idx[CurIDX])->getValue();
+ unsigned FieldNo = cast<ConstantInt>(Idx[CurIDX])->getZExtValue();
// Get structure layout information...
const StructLayout *Layout = getStructLayout(STy);
Ty = cast<SequentialType>(Ty)->getElementType();
// Get the array index and the size of each array element.
- int64_t arrayIdx = cast<ConstantInt>(Idx[CurIDX])->getRawValue();
+ int64_t arrayIdx = cast<ConstantInt>(Idx[CurIDX])->getSExtValue();
Result += arrayIdx * (int64_t)getTypeSize(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 {
+ const Type *ElemType = GV->getType()->getElementType();
+ unsigned Alignment = getTypeAlignmentShift(ElemType);
+ if (GV->getAlignment() > (1U << Alignment))
+ Alignment = Log2_32(GV->getAlignment());
+
+ if (GV->hasInitializer()) {
+ // Always round up alignment of global doubles to 8 bytes.
+ if (GV->getType()->getElementType() == Type::DoubleTy && Alignment < 3)
+ Alignment = 3;
+ 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)
+ Alignment = 4; // 16-byte alignment.
+ }
+ }
+ return Alignment;
+}
+
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