Obtain the pointer to the function invoked by this instruction.
Obtain whether a call instruction is a tail call.
Return the normal destination basic block.
Obtain the argument count for a call instruction.
Set the normal destination basic block.
Set whether a call instruction is a tail call.
Set the unwind destination basic block.
Return the unwind destination basic block.
Functions in this group apply to instructions that refer to call sites and invocations.
These correspond to C++ types in the llvm::CallInst or InvokeInst class tree.