-//===-- TransformInternals.cpp - Implement shared functions for transforms --=//
+//===- TransformInternals.cpp - Implement shared functions for transforms -===//
+//
+// 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 defines shared functions used by the different components of the
// Transforms library.
#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)) {
+ if (STy->getElementTypes().empty()) {
+ Offset = 0;
+ return STy;
+ }
+
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);
- Indices.push_back(ConstantUInt::get(Type::UIntTy, Offset/ChildSize));
+ Indices.push_back(ConstantSInt::get(Type::LongTy, Offset/ChildSize));
ThisOffset = (Offset/ChildSize)*ChildSize;
} else {
- Offset = 0; // Return the offset that we were able to acheive
+ Offset = 0; // Return the offset that we were able to achieve
return Ty; // Return the leaf type
}
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?
BasicBlock *BB = (*BI)->getParent();
- if (Expr.Var->getType() != Type::UIntTy) {
- CastInst *IdxCast = new CastInst(Expr.Var, Type::UIntTy);
- if (Expr.Var->hasName())
- IdxCast->setName(Expr.Var->getName()+"-idxcast");
- *BI = ++BB->getInstList().insert(*BI, IdxCast);
- Expr.Var = IdxCast;
- }
+ if (Expr.Var->getType() != Type::LongTy)
+ Expr.Var = new CastInst(Expr.Var, Type::LongTy,
+ Expr.Var->getName()+"-idxcast", *BI);
if (ScaleAmt && ScaleAmt != 1) {
// If we have to scale up our index, do so now
- Value *ScaleAmtVal = ConstantUInt::get(Type::UIntTy,
- (unsigned)ScaleAmt);
- Instruction *Scaler = BinaryOperator::create(Instruction::Mul,
- Expr.Var, ScaleAmtVal);
- if (Expr.Var->hasName())
- Scaler->setName(Expr.Var->getName()+"-scale");
-
- *BI = ++BB->getInstList().insert(*BI, Scaler);
- Expr.Var = Scaler;
+ 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 = ConstantUInt::get(Type::UIntTy, (unsigned)Index);
- Instruction *Offseter = BinaryOperator::create(Instruction::Add,
- Expr.Var, IndexAmt);
- if (Expr.Var->hasName())
- Offseter->setName(Expr.Var->getName()+"-offset");
- *BI = ++BB->getInstList().insert(*BI, Offseter);
- Expr.Var = Offseter;
+ Value *IndexAmt = ConstantSInt::get(Type::LongTy, Index);
+ Expr.Var = BinaryOperator::create(Instruction::Add, Expr.Var,
+ IndexAmt,
+ Expr.Var->getName()+"-offset",
+ *BI);
}
}
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;
- Indices.push_back(ConstantUInt::get(Type::UIntTy, Index));
- Offset -= (int)(Index*ElSize); // Consume part of the offset
+ uint64_t Index = Offset/ElSize;
+ Indices.push_back(ConstantSInt::get(Type::LongTy, Index));
+ 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
// Just index into element zero of the array here.
//
- Indices.push_back(ConstantUInt::get(Type::UIntTy, 0));
+ Indices.push_back(ConstantSInt::get(Type::LongTy, 0));
} else {
return 0; // Hrm. wierd, can't handle this case. Bail
}