void LLVMDefUseAnalysis::addDataDependence(LLVMNode *node, llvm::Value *rdval)
{
LLVMNode *rdnode = dg->getNode(rdval);
if (!rdnode) {
// that means that the value is not from this graph.
// We need to add interprocedural edge
llvm::Function *F
= llvm::cast<llvm::Instruction>(rdval)->getParent()->getParent();
LLVMNode *entryNode = dg->getGlobalNode(F);
assert(entryNode && "Don't have built function");
// get the graph where the node lives
LLVMDependenceGraph *graph = entryNode->getDG();
assert(graph != dg && "Cannot find a node");
rdnode = graph->getNode(rdval);
if (!rdnode) {
llvmutils::printerr("[DU] error: DG doesn't have val: ", rdval);
abort();
return;
}
}
assert(rdnode);
rdnode->addDataDependence(node);
}
void LLVMDefUseAnalysis::handleInlineAsm(LLVMNode *callNode)
{
CallInst *CI = cast<CallInst>(callNode->getValue());
LLVMDependenceGraph *dg = callNode->getDG();
// the last operand is the asm itself, so iterate only to e - 1
for (unsigned i = 0, e = CI->getNumOperands(); i < e - 1; ++i) {
Value *opVal = CI->getOperand(i);
if (!opVal->getType()->isPointerTy())
continue;
LLVMNode *opNode = dg->getNode(opVal->stripInBoundsOffsets());
if (!opNode) {
// FIXME: ConstantExpr
llvmutils::printerr("WARN: unhandled inline asm operand: ", opVal);
continue;
}
assert(opNode && "Do not have an operand for inline asm");
// if nothing else, this call at least uses the operands
opNode->addDataDependence(callNode);
}
}