search for: clonei

...ith the following code trying to do the replication and insertion: std::vector<Instruction *>::iterator p; Instruction * pi = PREVIOUS_POSITION; BasicBlock * pb = PREVIOUS_POSITION->getParent(); for(p = coll.begin(); p != coll.end(); ++p){ Instruction * CurI = * p; Instruction * CloneI = CurI->clone(); CloneI->setName(CurI->getName()); errs() << *CloneI << "\n"; pb->getInstList().insertAfter(pi, CloneI); // Inserts newInst after pi in pb // adjust pi: point to the newly inserted inst: pi = CurI; }//end of for loop on p Ho...

Hi Chuck, > std::vector<Instruction *>::iterator p; > Instruction * pi = PREVIOUS_POSITION; > BasicBlock * pb = PREVIOUS_POSITION->getParent(); > > for(p = coll.begin(); p != coll.end(); ++p){ > Instruction * CurI = * p; > Instruction * CloneI = CurI->clone(); clone doesn't know have any magical way of knowing that it should update the instruction's operands to point to the clone you created earlier. For example, consider %l = load i32* @ins_h, align 4 %s = shl i32 %l, 5 You clone %l, getting: %lc = load i32* @ins_h...

Dear Chuck, I haven't read all of the details, but it seems that what you need to do is to clone defs before you clone any uses of the def. To do that, you want to iterate over the instructions in dominator-tree order. To do that, you first construct the dominator tree (there is an LLVM analysis pass that does that). Then, you iterate over the basic blocks in the dominator tree from

While working on my optimization pass (a Function Pass), I try to replicate a call instruction and insert it at some earlier location (similar to LICM). However, the instruction I am trying to replicate has dependencies on an uncertain number of instructions that are used to generate an address. A simple example (IR segment): define void @foo() nounwind { entry: %a = alloca i32, align 4;