search for: getargoperand

Hi everyone: The code I am analyzing is : int main() { int i = 0; printf("hello world!"); printf( "%d" , i ); } I want to get each place where printf is called, and the argument used during that call. so I write llvm pass code like: void Myfunction( Function & F){ for( Function::iterator b = F.begin() , be = F.end() ;

...lvm-3.7 Inside lib/Transforms/InstCombine/InstCombineCompares.cpp there is attempt to optimize fabs: if (F->getIntrinsicID() == Intrinsic::fabs || ... switch (I.getPredicate()) { ... case FCmpInst::FCMP_OGT: return new FCmpInst(FCmpInst::FCMP_ONE, CI->getArgOperand(0), RHSC); But CI->getArgOperand(0) returns operand with type (double*) rather then double, because in our ABI doubles are passed via memory. Next assertion fires inside FCmpInst ctor: llvm::FCmpInst::FCmpInst(llvm::CmpInst::Predicate, llvm::Value*, llvm::Value*, const llvm::Twine&): Ass...

Thanks a lot! I finally fix my problem. My code is like this: //CallInst* pCall pCall is a printf called in my situation if( ConstantExpr * pCE = dyn_cast<ConstantExpr>( pCall->getArgOperand(0))){ if( GlobalVariable * pGV = dyn_cast<GlobalVariable>( pCE->getOperand(0))){ if( ConstantArray * pCA = dyn_cast<ConstantArray>( pGV->getInitializer() )){ Err << pCA->getAsString() <...

...un into a weird problem. (Note, this has nothing to do with the patch I have proposed, this error occurs with regular old pointer-allocas.) The exception I am getting occurs in this code here in SelectionDAGBuilder.cpp: *case* *Intrinsic*::gcroot: *if* (GFI) { *const* Value *Alloca = I.getArgOperand(0); *const* Constant *TypeMap = cast<Constant>(I.getArgOperand(1)); * FrameIndexSDNode *FI = cast<FrameIndexSDNode>(getValue(Alloca).getNode());* GFI->addStackRoot(FI->getIndex(), TypeMap); } *return* 0; Specifically, the cast from SDNode to FrameIndexSDNode fa...

...backend behaviors is unable to affect > DWARF generation, right? why do we need to affect type generation? we just need to know dwarf type id in the backend, so we can emit it as a constant. I still think lowering eh_typeid_for differently may work. Like instead of doing GV = ExtractTypeInfo(I.getArgOperand(0)) followed by getMachineFunction().getMMI().getTypeIDFor(GV) we can get dwarf type id from I.getArgOperand(0) if it's any pointer to struct type. I'm not familiar with dwarf handling part of llvm, but feels possible.

...} > > } > } > > > How could I get the function name and the arguments when I know an > Instruction is a function call? There's a worked example at http://wiki.llvm.org/HowTo:_Find_all_call_sites_of_a_function . With the CallInst/InvokeInst you can query getArgOperand() to get the arguments or getCallee() which return a Function -- or it might not. If the call is an indirect call (ie., function pointer) then you don't know what it's calling. Ignoring indirect calls, you can call getName() on a function to get its name. Personally, I rely heavily on...

...rned one is still the original one > (CI). So I am very curious about how the call instruction is replaced here. > > // printf("%s\n", str) --> puts(str) > if (FormatStr == "%s\n" && CI->getNumArgOperands() > 1 && > CI->getArgOperand(1)->getType()->isPointerTy()) { > EmitPutS(CI->getArgOperand(1), B, TD); > return CI; > } > > -Thomson

...othing to do with the patch I have proposed, this error occurs with regular > old pointer-allocas.) > > The exception I am getting occurs in this code here in > SelectionDAGBuilder.cpp: > > *case* *Intrinsic*::gcroot: > > *if* (GFI) { > *const* Value *Alloca = I.getArgOperand(0); > *const* Constant *TypeMap = cast<Constant>(I.getArgOperand(1)); > * FrameIndexSDNode *FI = cast<FrameIndexSDNode>(getValue(Alloca).getNode());* GFI->addStackRoot(FI->getIndex(), TypeMap); > } > *return* 0; > > Specifically, the cast...

I'm trying to track down the problem with the assertion failure in SelectionDAGBuilder.cpp. This is the code: *case* *Intrinsic*::gcroot: *if* (GFI) { *const* Value *Alloca = I.getArgOperand(0); *const* Constant *TypeMap = cast<Constant>(I.getArgOperand(1)); * FrameIndexSDNode *FI = cast<FrameIndexSDNode>(getValue(Alloca).getNode());* GFI->addStackRoot(FI->getIndex(), TypeMap); } *return* 0 The cast<FrameIndexSDNode> is what's failing. Ap...

I found that LLVM optimized the IR by replacing printf with puts. I wondered which pass did this optimization? And is it common that puts is faster (and some other metric) than printf? -- Thanks Thomson -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20120617/08aa6c45/attachment.html>

...truction iterator on BasicBlock, I get the RHS of instruction but not the LHS. How do I get name of nameless LHS registers(%1, %2). C Code : p_ptr ((unsigned long) &abc); LLVM IR : call void @p_ptr(i64 ptrtoint (%struct.my_struct* @abc to i64)) nounwind, !dbg !52 I think by the call CI->getArgOperand(0) you mean CI->getOperand(0). That doesn't return the ptrtoint constant expression. The CI instruction has shows two operands. The first operand is the function name. The second operand prints NULL. thank you, Shankha Banerjee

...= b.begin(), ie = b.end(); (i != ie) && (block_split == false);) { IntrinsicInst *ii = dyn_cast<IntrinsicInst>(&*i); ++i; if(ii) { switch (ii->getIntrinsicID()) { case Intrinsic::objectsize: { IRBuilder<> builder(ii->getParent(), ii); Value *op1 = ii->getArgOperand(0); //i8* uint64_t bit_size = op1->getType()->getPointerElementType()->getPrimitiveSizeInBits(); Value *result = ConstantInt::get(ii->getType(), bit_size); ii->replaceAllUsesWith(result); ii->removeFromParent(); delete ii; break; } } } I'm new to LLVM and...

...;, &CI, Target); FunctionType *TargetFuncType = cast<FunctionType>(PT->getElementType()); - Assert1(!TargetFuncType->isVarArg(), - "gc.statepoint support for var arg functions not implemented", &CI); const Value *NumCallArgsV = CI.getArgOperand(1); Assert1(isa<ConstantInt>(NumCallArgsV), @@ -2650,8 +2648,13 @@ void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) { Assert1(NumCallArgs >= 0, "gc.statepoint number of arguments to underlying call " "must be p...

Hi all, I would like my optimization pass to change an object's address space that is created by llvm.lifetime.start intrinsic. Because I want to be able to identify them later in a codegen pass. I can get a pointer from the intrinsic using CallInst::getArgOperand() function. However, I don't know what to do with it (or if it is the pointer that I want). How can I change its address space? If there is an easier way to "mark" that object, I would like to know that too. Thanks,Erdem. -------------- next part -------------- An HTML att...

Hi, I'm not sure. But in your lowered DAG the chain nodes are the first operands for you custom nodes, however for the other nodes the chain is the last operand. I seem to remember that during targetlowering the chain is the first operand and then it seems to switch over after ISelDAG, this confused me and may have something to do with the issue that you are seeing. I really don't

...ted I think that it is OK. > --- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp > +++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp > @@ -4947,12 +4947,16 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) { > Ops[4] = DAG.getSrcValue(I.getArgOperand(0)); > Ops[5] = DAG.getSrcValue(F); > > - Res = DAG.getNode(ISD::TRAMPOLINE, dl, > - DAG.getVTList(TLI.getPointerTy(), MVT::Other), > - Ops, 6); > + Res = DAG.getNode(ISD::INIT_TRAMPOLINE, dl, MVT::Other, Ops, 6); > > -...

Thank you Ahmad, I figured out that, although the type of both p(oInst) and p(nInst) were the same, I had to: for (unsigned int i = 0; i < callOInst->getNumArgOperands(); i++) { callOInst->getArgOperand(i)->mutateType(callNInst->getArgOperand(i)->getType()); } that solves the issue at the calling instruction in the main function, but now I see that *linkModules* does not work for me (it's a mess to bring all the other unnecessary functions from the reference module) so what I need is...

Hi! Attached set of patches splits llvm.init.trampoline into an "init" phase and an "adjust" phase, as discussed on the "Go on dragonegg" thread. Thanks! -- Sanjoy Das http://playingwithpointers.com -------------- next part -------------- A non-text attachment was scrubbed... Name: 0001-Split-intrinsics-and-DAG-nodes.patch Type: text/x-diff Size: 8808 bytes Desc:

...R(Op, DAG); This is despite the fact that I can confirm the following line inside SelectionDAGBuilder::visitIntrinsicCall *is* getting called: case Intrinsic::setreturnaddress: setValue(&I, DAG.getNode(ISD::SETRETURNADDR, sdl, TLI->getPointerTy(), getValue(I.getArgOperand(0)), getValue(I.getArgOperand(1)))); return 0; My best guess is that my code is being optimized out -- but I'm not sure where or why. Does anyone know why this might be happening? Thank you! Mehrdad -------------- next part -------------- An HTML attachment w...

On 2/16/2016 8:44 AM, Konstantin Vladimirov via llvm-dev wrote: > > CI->getArgOperand(0) returns operand with type (double*) rather then > double, because in our ABI doubles are passed via memory. The LLVM intrinsics in the LLVM IR must conform to whatever the IR's requirements are. That means that even in the case of your backend, the arguments to the intrinsic must be do...