mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 19:52:54 +01:00
113 lines
3.8 KiB
C++
113 lines
3.8 KiB
C++
//===-- llvm/Support/CallSite.h - Abstract Call & Invoke instrs -*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file was developed by the LLVM research group and is distributed under
|
|
// the University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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.
|
|
//
|
|
// NOTE: This class is supposed to have "value semantics". So it should be
|
|
// passed by value, not by reference; it should not be "new"ed or "delete"d. It
|
|
// is efficiently copyable, assignable and constructable, with cost equivalent
|
|
// to copying a pointer. (You will notice that it has only a single data
|
|
// member.)
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_SUPPORT_CALLSITE_H
|
|
#define LLVM_SUPPORT_CALLSITE_H
|
|
|
|
#include "llvm/Instruction.h"
|
|
#include "llvm/BasicBlock.h"
|
|
|
|
namespace llvm {
|
|
|
|
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();
|
|
}
|
|
|
|
/// getType - Return the type of the instruction that generated this call site
|
|
///
|
|
const Type *getType () const { return I->getType (); }
|
|
|
|
/// getInstruction - Return the instruction this call site corresponds to
|
|
///
|
|
Instruction *getInstruction() const { return I; }
|
|
|
|
/// getCaller - Return the caller function for this call site
|
|
///
|
|
Function *getCaller() const { return I->getParent()->getParent(); }
|
|
|
|
/// getCalledValue - Return the pointer to function that is being called...
|
|
///
|
|
Value *getCalledValue() const {
|
|
assert(I && "Not a call or invoke instruction!");
|
|
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).
|
|
///
|
|
/// FIXME: This should be inlined once ConstantPointerRefs are gone. :(
|
|
Function *getCalledFunction() const;
|
|
|
|
/// setCalledFunction - Set the callee to the specified value...
|
|
///
|
|
void setCalledFunction(Value *V) {
|
|
assert(I && "Not a call or invoke instruction!");
|
|
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 {
|
|
assert(I && "Not a call or invoke instruction!");
|
|
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(); }
|
|
unsigned arg_size() const { return unsigned(arg_end() - arg_begin()); }
|
|
|
|
bool operator<(const CallSite &CS) const {
|
|
return getInstruction() < CS.getInstruction();
|
|
}
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|