search for: use_end

...e "llvm/Support/CallSite.h" @@ -150,6 +151,19 @@ ->addCalledFunction(CS, Node); else isUsedExternally = true; + } else if (ConstantExpr* CE = dyn_cast<ConstantExpr>(*I)) { + for (Value::use_iterator I = CE->use_begin(), E = CE->use_end(); + I != E; ++I) + if (Instruction* Inst = dyn_cast<Instruction>(*I)) { + CallSite CS = CallSite::get(Inst); + if (isOnlyADirectCall(F, CS)) + getOrInsertFunction(Inst->getParent()->getParent()) + ->addCalledFunc...

Say I want to find all LLVM Value*-es that a live on exit from a basic block. What's the best way? - The 'LiveRange', 'LiveVariables' and 'LiveIntervals' classes seem to be tied to register allocation. - The ./lib/Target/SparcV9/LiveVar/FunctionLiveVarInfo.h file seem to provide what I need, but it's no a public header. - Volodya

...o find the uses of strings, and strings are defined as global variables). So, I can iterate over global vars by for(Module::global_iterator gi = M.global_begin(), gend = M.global_end(); gi != gend; ++gi) ...... But if I use its def-use chain for(Value::use_iterator i = gi->use_begin(), e = F->use_end; i!=e; ++i) it is not actually able to find its uses, as it gives <null> instructions! I have even tried to iterate over instructions in the module, then find the use-def of each instruction for(User::op_iterator I = theInstruction->op_begin(), E=theInstruction->op_end(); I!=E; ++I) Aft...

Hi all, How can I get a reference to an instruction if I have a reference to an operand? For example, let suppose I have a reference to the ConstantExpr "getelementptr inbounds" in the following instruction: %4 = getelementptr i32* getelementptr inbounds ([8 x i32]* @__mem_grid_MOD_nnyp, i32 0, i32 0), i32 %3 then, how can I get a reference to the GetElementPtrInst object? The

...nLiveVarInfo.h file seem to provide >>> what I need, but it's no a public header. >> >> This is overkill. I would suggest something like this: >> >> bool LiveOutsideOfBlock(Instruction *I) { >> for (Value::use_iterator UI = I->use_begin(), E = I->use_end(); UI != E; ++UI) >> if (cast<Instruction>(*UI))->getParent() != I->getParent()) return true; >> return false; >> } > > Is this really going to work? What if the value is used in a loop and it > is used by a phi-node in the same block it is defined? G...

...e.h" > @@ -150,6 +151,19 @@ > -> addCalledFunction(CS, Node); > else > isUsedExternally = true; > + } else if (ConstantExpr* CE = dyn_cast<ConstantExpr>(*I)) { > + for (Value::use_iterator I = CE->use_begin(), E = CE->use_end(); > + I != E; ++I) > + if (Instruction* Inst = dyn_cast<Instruction>(*I)) { > + CallSite CS = CallSite::get(Inst); > + if (isOnlyADirectCall(F, CS)) > + getOrInsertFunction(Inst->getParent()->getParent()) > +...

...k the same thing the added asserts check? What I'm seeing is a problem in ReplaceAllUsesOf itself. It recurses down and eventually replaces the node under the iterator in this use loop: SDNode::use_iterator UI = From.getNode()->use_begin(), UE = From.getNode()->use_end(); while (UI != UE) { SDNode *User = *UI; bool UserRemovedFromCSEMaps = false; UI goes bad and we blow up after returning from a deeply recursed call. It's simply not safe to iterate over a set that may change. Unfortunately, any of the nodes under the iterators may change so I do...

...ve missed? If not, > is there a better way to find all uses of a defined value post register > allocation? Writing a def/use chain pass would not be hard but if the > information is already there I'd rather avoid that cost. :) Do the MachineRegisterInfo::def_begin/def_end/use_begin/use_end iterators not work on physical registers? --Owen

...above the > __mem_grid_MOD_nnyp variable). The problem is that for the example I > showed the actual user of the variable is a ConstantExpr object and > not the GetElementPtrInst object. You can traverse the User's of a Value with the iterators returned by Value::use_begin and Value::use_end methods.

Hi Oscar: In instructions like the one I showed can I expect that Value::use_begin and Value::use_end will return only the getelementptr or there is a chance I will get other users of that constant? Thanks a lot, Eduardo On Jan 8, 2013 9:39 PM, "Óscar Fuentes" <ofv at wanadoo.es> wrote: > Eduardo <erocha.ssa at gmail.com> writes: > > > How can I get a reference to...

...as Values reordered each time I analyze a particular piece of code(which doesn't change) with the LLVM opt tool and my LLVM pass. void Anders::id_gep_ce(Value *G){ assert(G); //Check all GEP and bitcast ConstantExpr's using G. for(Value::use_iterator it= G->use_begin(), ie= G->use_end(); it != ie; ++it){ ConstantExpr *E= dyn_cast<ConstantExpr>(*it); do_something_with(E); } i.e. use_begin() and use_end() still works correctly such that iterates through all the uses of G but the uses themselves are reordered. My question is whether I can deterministically iterate t...

...memory. > > What I'm seeing is a problem in ReplaceAllUsesOf itself. It recurses > down and eventually replaces the node under the iterator in this use > loop: > > SDNode::use_iterator UI = From.getNode()->use_begin(), > UE = From.getNode()->use_end(); > while (UI != UE) { > SDNode *User = *UI; > bool UserRemovedFromCSEMaps = false; > > > UI goes bad and we blow up after returning from a deeply recursed call. > > It's simply not safe to iterate over a set that may change. Unfortunately, > any of the no...

...19 @@ > > -> addCalledFunction(CS, Node); > > else > > isUsedExternally = true; > > + } else if (ConstantExpr* CE = dyn_cast<ConstantExpr>(*I)) { > > + for (Value::use_iterator I = CE->use_begin(), E = > CE->use_end(); > > + I != E; ++I) > > + if (Instruction* Inst = dyn_cast<Instruction>(*I)) { > > + CallSite CS = CallSite::get(Inst); > > + if (isOnlyADirectCall(F, CS)) > > + getOrInsertFunction(Inst->getParent()-&g...

In LiveIntervals::processImplicitDefs() we have this: for (MachineRegisterInfo::use_iterator UI = mri_->use_begin(Reg), UE = mri_->use_end(); UI != UE; ) { MachineOperand &RMO = UI.getOperand(); MachineInstr *RMI = &*UI; ++UI; MachineBasicBlock *RMBB = RMI->getParent(); if (RMBB == MBB) continue; const TargetRegisterClass* RC = mri_->getRegClass(Reg); unsi...

Thanks a lot for your help Matthijs! :) basically this does the job quite nicely I think: for (llvm::GlobalVariable::use_iterator U = gv->use_begin(); U != gv->use_end(); ++U) { llvm::Instruction *I = llvm::cast<llvm::Instruction>(U); I->replaceAllUsesWith(constPtr); I->eraseFromParent(); } Cheers, Ralf Matthijs Kooijman wrote: > Hi Ralf, > > >> I am trying to replace a global variable with a constant. >> &gt...

Hi, I try to iterate over all uses of a Function with the following code (simplified): for (Value::use_iterator UI = F->use_begin(), UE = F->use_end(); UI != UE; ++UI) { if (CallInst* I = dyn_cast<CallInst>(*UI)) { // do something interesting } } This works on Linux, but on Windows the dyn_cast fails, even though the only use of F in that module is a 'call'. However, dyn_cast<Instruction&...

Looking through TOT sources, I don't see anything that would provide def/use chains (or equivalent information) post register allocation. I would like to write some peeps to clean up various target-specific things but for safety I will need such information. Is such an analysis pass available somewhere that I've missed? If not, is there a better way to find all uses of a defined value

...quot;\n"; //printed : %3 = load i32* %c, align 4 Printed as expected. But I want to use %c. Do you know how I can get %c ? I need to use the value %c in some computations. First, I tried for (llvm::Value::use_iterator VI=(*I1->getOperand(0)).use_begin(), VE=(*I1->getOperand(0)).use_end(); VI != VE ; ++VI) { errs()<<"\n "<<**VI<<" \n"; //printed : %cmp3 = icmp ne i32 %3, 0 } But it is not getting Value* fields. Also, it is printing only one VI per for, so VI cannot increment. Second, it is a solution of taking the...

...==================== --- lib/IR/Verifier.cpp (revision 203468) +++ lib/IR/Verifier.cpp (working copy) @@ -360,6 +360,11 @@ "Global is external, but doesn't have external or weak linkage!", &GV); + for (Value::const_use_iterator UI = GV.use_begin(), UE = GV.use_end(); + UI != UE; ++UI) { + Assert1(*UI != &GV, "Global values cannot be their own uses!", &GV); + } + Assert1(!GV.hasAppendingLinkage() || isa<GlobalVariable>(GV), "Only global variables can have appending linkage!", &GV); – Is it ever rea...

...to provide >>>> what I need, but it's no a public header. >>> >>> This is overkill. I would suggest something like this: >>> >>> bool LiveOutsideOfBlock(Instruction *I) { >>> for (Value::use_iterator UI = I->use_begin(), E = I->use_end(); >>> UI != E; ++UI) >>> if (cast<Instruction>(*UI))->getParent() != I->getParent()) >>> return true; >>> return false; >>> } >> >> Is this really going to work? What if the value is used in a loop and >> it >...