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//===-- llvm/Support/CallSite.h - Abstract Call & Invoke instrs -*- C++ -*-===//
//
// This file defines the CallSite class, which is a handy wrapper for code that
// wants to treat Call and Invoke instructions in a generic way.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_CALLSITE_H
#define LLVM_SUPPORT_CALLSITE_H
#include "llvm/Instruction.h"
class CallInst;
class InvokeInst;
class CallSite {
Instruction *I;
public:
CallSite() : I(0) {}
CallSite(CallInst *CI) : I((Instruction*)CI) {}
CallSite(InvokeInst *II) : I((Instruction*)II) {}
CallSite(const CallSite &CS) : I(CS.I) {}
CallSite &operator=(const CallSite &CS) { I = CS.I; return *this; }
/// CallSite::get - This static method is sort of like a constructor. It will
/// create an appropriate call site for a Call or Invoke instruction, but it
/// can also create a null initialized CallSite object for something which is
/// NOT a call site.
///
static CallSite get(Value *V) {
if (Instruction *I = dyn_cast<Instruction>(V)) {
if (I->getOpcode() == Instruction::Call)
return CallSite((CallInst*)I);
else if (I->getOpcode() == Instruction::Invoke)
return CallSite((InvokeInst*)I);
}
return CallSite();
}
/// getInstruction - Return the instruction this call site corresponds to
///
Instruction *getInstruction() const { return I; }
/// getCalledValue - Return the pointer to function that is being called...
///
Value *getCalledValue() const { return I->getOperand(0); }
/// getCalledFunction - Return the function being called if this is a direct
/// call, otherwise return null (if it's an indirect call).
///
Function *getCalledFunction() const {
return dyn_cast<Function>(getCalledValue());
}
/// setCalledFunction - Set the callee to the specified value...
///
void setCalledFunction(Value *V) {
I->setOperand(0, V);
}
/// arg_iterator - The type of iterator to use when looping over actual
/// arguments at this call site...
typedef User::op_iterator arg_iterator;
/// arg_begin/arg_end - Return iterators corresponding to the actual argument
/// list for a call site.
///
arg_iterator arg_begin() const {
if (I->getOpcode() == Instruction::Call)
return I->op_begin()+1; // Skip Function
else
return I->op_begin()+3; // Skip Function, BB, BB
}
arg_iterator arg_end() const { return I->op_end(); }
};
#endif
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