#include "llvm/Function.h"
#include "llvm/iOther.h"
-// TargetData Hack: Eventually we will have annotations given to us by the
-// backend so that we know stuff about type size and alignments. For now
-// though, just use this, because it happens to match the model that GCC uses.
-//
-const TargetData TD("LevelRaise: Should be GCC though!");
-
-
-static const Type *getStructOffsetStep(const StructType *STy, unsigned &Offset,
- std::vector<Value*> &Indices) {
+static const Type *getStructOffsetStep(const StructType *STy, uint64_t &Offset,
+ std::vector<Value*> &Indices,
+ const TargetData &TD) {
assert(Offset < TD.getTypeSize(STy) && "Offset not in composite!");
const StructLayout *SL = TD.getStructLayout(STy);
//
const Type *getStructOffsetType(const Type *Ty, unsigned &Offset,
std::vector<Value*> &Indices,
- bool StopEarly) {
+ const TargetData &TD, bool StopEarly) {
if (Offset == 0 && StopEarly && !Indices.empty())
return Ty; // Return the leaf type
- unsigned ThisOffset;
+ uint64_t ThisOffset;
const Type *NextType;
if (const StructType *STy = dyn_cast<StructType>(Ty)) {
ThisOffset = Offset;
- NextType = getStructOffsetStep(STy, ThisOffset, Indices);
+ NextType = getStructOffsetStep(STy, ThisOffset, Indices, TD);
} else if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
- assert(Offset < TD.getTypeSize(ATy) && "Offset not in composite!");
+ assert(Offset == 0 || Offset < TD.getTypeSize(ATy) &&
+ "Offset not in composite!");
NextType = ATy->getElementType();
unsigned ChildSize = TD.getTypeSize(NextType);
unsigned SubOffs = Offset - ThisOffset;
const Type *LeafTy = getStructOffsetType(NextType, SubOffs,
- Indices, StopEarly);
+ Indices, TD, StopEarly);
Offset = ThisOffset + SubOffs;
return LeafTy;
}
-// ConvertableToGEP - This function returns true if the specified value V is
+// ConvertibleToGEP - This function returns true if the specified value V is
// a valid index into a pointer of type Ty. If it is valid, Idx is filled in
// with the values that would be appropriate to make this a getelementptr
// instruction. The type returned is the root type that the GEP would point to
//
-const Type *ConvertableToGEP(const Type *Ty, Value *OffsetVal,
+const Type *ConvertibleToGEP(const Type *Ty, Value *OffsetVal,
std::vector<Value*> &Indices,
+ const TargetData &TD,
BasicBlock::iterator *BI) {
const CompositeType *CompTy = dyn_cast<CompositeType>(Ty);
if (CompTy == 0) return 0;
// Get the offset and scale values if they exists...
// A scale of zero with Expr.Var != 0 means a scale of 1.
//
- int Offset = Expr.Offset ? getConstantValue(Expr.Offset) : 0;
- int Scale = Expr.Scale ? getConstantValue(Expr.Scale) : 0;
+ int64_t Offset = Expr.Offset ? getConstantValue(Expr.Offset) : 0;
+ int64_t Scale = Expr.Scale ? getConstantValue(Expr.Scale) : 0;
if (Expr.Var && Scale == 0) Scale = 1; // Scale != 0 if Expr.Var != 0
if (const StructType *StructTy = dyn_cast<StructType>(CompTy)) {
// Step into the appropriate element of the structure...
- unsigned ActualOffset = (Offset < 0) ? 0 : (unsigned)Offset;
- NextTy = getStructOffsetStep(StructTy, ActualOffset, Indices);
+ uint64_t ActualOffset = (Offset < 0) ? 0 : (uint64_t)Offset;
+ NextTy = getStructOffsetStep(StructTy, ActualOffset, Indices, TD);
Offset -= ActualOffset;
} else {
const Type *ElTy = cast<SequentialType>(CompTy)->getElementType();
- if (!ElTy->isSized())
+ if (!ElTy->isSized() || (isa<PointerType>(CompTy) && !Indices.empty()))
return 0; // Type is unreasonable... escape!
unsigned ElSize = TD.getTypeSize(ElTy);
- int ElSizeS = (int)ElSize;
+ if (ElSize == 0) return 0; // Avoid division by zero...
+ int64_t ElSizeS = ElSize;
// See if the user is indexing into a different cell of this array...
if (Scale && (Scale >= ElSizeS || -Scale >= ElSizeS)) {
// array by one. In this case, we will have to insert math to munge
// the index.
//
- int ScaleAmt = Scale/ElSizeS;
+ int64_t ScaleAmt = Scale/ElSizeS;
if (Scale-ScaleAmt*ElSizeS)
return 0; // Didn't scale by a multiple of element size, bail out
Scale = 0; // Scale is consumed
- int Index = Offset/ElSize; // is zero unless Offset > ElSize
+ int64_t Index = Offset/ElSize; // is zero unless Offset > ElSize
Offset -= Index*ElSize; // Consume part of the offset
if (BI) { // Generate code?
if (ScaleAmt && ScaleAmt != 1) {
// If we have to scale up our index, do so now
- Value *ScaleAmtVal = ConstantSInt::get(Type::LongTy,
- (unsigned)ScaleAmt);
+ Value *ScaleAmtVal = ConstantSInt::get(Type::LongTy, ScaleAmt);
Expr.Var = BinaryOperator::create(Instruction::Mul, Expr.Var,
ScaleAmtVal,
Expr.Var->getName()+"-scale",*BI);
}
if (Index) { // Add an offset to the index
- Value *IndexAmt = ConstantSInt::get(Type::LongTy, (unsigned)Index);
+ Value *IndexAmt = ConstantSInt::get(Type::LongTy, Index);
Expr.Var = BinaryOperator::create(Instruction::Add, Expr.Var,
IndexAmt,
Expr.Var->getName()+"-offset",
Indices.push_back(Expr.Var);
Expr.Var = 0;
- } else if (Offset >= (int)ElSize || -Offset >= (int)ElSize) {
+ } else if (Offset >= (int64_t)ElSize || -Offset >= (int64_t)ElSize) {
// Calculate the index that we are entering into the array cell with
- unsigned Index = Offset/ElSize;
+ uint64_t Index = Offset/ElSize;
Indices.push_back(ConstantSInt::get(Type::LongTy, Index));
- Offset -= (int)(Index*ElSize); // Consume part of the offset
+ Offset -= (int64_t)(Index*ElSize); // Consume part of the offset
} else if (isa<ArrayType>(CompTy) || Indices.empty()) {
// Must be indexing a small amount into the first cell of the array
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