[LLVMdev] Replacing instruction in LLVM IR by an intrinsics

[Eli Friedman]

On Thu, Jun 25, 2009 at 12:32 AM, ihusar<ihusar at fit.vutbr.cz> wrote:
>                //now i need to create an instruction that represents a call to a intrinsic
>                Function* FIntr = Intrinsic::getDeclaration(&M, Intrinsic::regread_i32);
>
>                // here it fails: void llvm::CallInst::init(llvm::Value*):
>                //Assertion `FTy->getNumParams() == 0 && "Calling a function with bad signature"' failed.
>                Instruction* Instr = CallInst::Create(FIntr);

You have to include the operands in the call to CallInst::Create.

-Eli