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- Change getelementptr instruction to use long indexes instead of uint

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indexes for sequential types.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3682 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2002-09-11 01:21:33 +00:00
parent 106ff4551c
commit 3cac88ac9e
3 changed files with 9 additions and 9 deletions
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10
lib/Target/TargetData.cpp
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@ -157,17 +157,17 @@ uint64_t TargetData::getIndexedOffset(const Type *ptrTy,
assert(isa<PointerType>(Ty) && "Illegal argument for getIndexedOffset()");
uint64_t Result = 0;
for (unsigned CurIDX = 0; CurIDX < Idx.size(); ++CurIDX) {
if (Idx[CurIDX]->getType() == Type::UIntTy) {
for (unsigned CurIDX = 0; CurIDX != Idx.size(); ++CurIDX) {
if (Idx[CurIDX]->getType() == Type::LongTy) {
// Update Ty to refer to current element
Ty = cast<SequentialType>(Ty)->getElementType();
// Get the array index and the size of each array element.
// Both must be known constants, or this will fail.
// Also, the product needs to be sign-extended from 32 to 64 bits.
uint64_t elementSize = this->getTypeSize(Ty);
uint64_t arrayIdx = cast<ConstantUInt>(Idx[CurIDX])->getValue();
Result += (uint64_t) (int) (arrayIdx * elementSize); // sign-extend
int64_t elementSize = (int64_t)getTypeSize(Ty);
int64_t arrayIdx = cast<ConstantSInt>(Idx[CurIDX])->getValue();
Result += (uint64_t)(arrayIdx * elementSize);
} else if (const StructType *STy = dyn_cast<const StructType>(Ty)) {
assert(Idx[CurIDX]->getType() == Type::UByteTy && "Illegal struct idx");

4
lib/Transforms/Scalar/DecomposeMultiDimRefs.cpp
View File

@ -94,7 +94,7 @@ DecomposePass::decomposeArrayRef(GetElementPtrInst &GEP)
continue;
} else {
// Not the first index: include initial [0] to deref the last ptr
Indices.push_back(Constant::getNullValue(Type::UIntTy));
Indices.push_back(Constant::getNullValue(Type::LongTy));
}
Indices.push_back(*OI);
@ -110,7 +110,7 @@ DecomposePass::decomposeArrayRef(GetElementPtrInst &GEP)
// Get the final index vector, including an initial [0] as before.
std::vector<Value*> Indices;
Indices.push_back(Constant::getNullValue(Type::UIntTy));
Indices.push_back(Constant::getNullValue(Type::LongTy));
Indices.push_back(*OI);
Value *NewVal = new GetElementPtrInst(LastPtr, Indices, GEP.getName(),

4
lib/Transforms/Scalar/InstructionCombining.cpp
View File

@ -649,7 +649,7 @@ Instruction *InstCombiner::visitGetElementPtrInst(GetElementPtrInst &GEP) {
// Is it 'getelementptr %P, uint 0' or 'getelementptr %P'
// If so, eliminate the noop.
if ((GEP.getNumOperands() == 2 &&
GEP.getOperand(1) == Constant::getNullValue(Type::UIntTy)) ||
GEP.getOperand(1) == Constant::getNullValue(Type::LongTy)) ||
GEP.getNumOperands() == 1)
return ReplaceInstUsesWith(GEP, GEP.getOperand(0));
@ -669,7 +669,7 @@ Instruction *InstCombiner::visitGetElementPtrInst(GetElementPtrInst &GEP) {
*cast<Constant>(GEP.getOperand(1));
assert(Indices[0] != 0 && "Constant folding of uint's failed!?");
} else if (*GEP.idx_begin() == ConstantUInt::get(Type::UIntTy, 0)) {
} else if (*GEP.idx_begin() == ConstantUInt::getNullValue(Type::LongTy)) {
// Otherwise we can do the fold if the first index of the GEP is a zero
Indices.insert(Indices.end(), Src->idx_begin(), Src->idx_end());
Indices.insert(Indices.end(), GEP.idx_begin()+1, GEP.idx_end());