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* Implement fully general merging of array subscripts on demand! This
does not handle the initial pointer index case yet though. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4012 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -283,10 +283,34 @@ void GraphBuilder::visitGetElementPtrInst(GetElementPtrInst &GEP) {
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for (unsigned i = 1, e = GEP.getNumOperands(); i != e; ++i)
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if (GEP.getOperand(i)->getType() == Type::LongTy) {
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if (GEP.getOperand(i) != Constant::getNullValue(Type::LongTy)) {
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std::cerr << "Array indexing not handled yet!\n";
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// Get the type indexing into...
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const SequentialType *STy = cast<SequentialType>(CurTy);
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CurTy = STy->getElementType();
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if (ConstantSInt *CS = dyn_cast<ConstantSInt>(GEP.getOperand(i))) {
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if (isa<PointerType>(STy))
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std::cerr << "Pointer indexing not handled yet!\n";
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else
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Offset += CS->getValue()*TD.getTypeSize(CurTy);
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} else {
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// Variable index into a node. We must merge all of the elements of the
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// sequential type here.
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if (isa<PointerType>(STy))
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std::cerr << "Pointer indexing not handled yet!\n";
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else {
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const ArrayType *ATy = cast<ArrayType>(STy);
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unsigned ElSize = TD.getTypeSize(CurTy);
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DSNode *N = Value.getNode();
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assert(N && "Value must have a node!");
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unsigned RawOffset = Offset+Value.getOffset();
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// Loop over all of the elements of the array, merging them into the
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// zero'th element.
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for (unsigned i = 1, e = ATy->getNumElements(); i != e; ++i)
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// Merge all of the byte components of this array element
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for (unsigned j = 0; j != ElSize; ++j)
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N->mergeIndexes(RawOffset+j, RawOffset+i*ElSize+j);
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}
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}
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CurTy = cast<SequentialType>(CurTy)->getElementType();
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} else if (GEP.getOperand(i)->getType() == Type::UByteTy) {
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unsigned FieldNo = cast<ConstantUInt>(GEP.getOperand(i))->getValue();
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const StructType *STy = cast<StructType>(CurTy);
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