llvm-6502/include/llvm/IntrinsicInst.h
2004-10-12 04:45:20 +00:00

199 lines
7.2 KiB
C++

//===-- llvm/InstrinsicInst.h - Intrinsic Instruction Wrappers --*- 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 classes that make it really easy to deal with intrinsic
// functions with the isa/dyncast family of functions. In particular, this
// allows you to do things like:
//
// if (MemCpyInst *MCI = dyn_cast<MemCpyInst>(Inst))
// ... MCI->getDest() ... MCI->getSource() ...
//
// All intrinsic function calls are instances of the call instruction, so these
// are all subclasses of the CallInst class. Note that none of these classes
// has state or virtual methods, which is an important part of this gross/neat
// hack working.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_INTRINSICINST_H
#define LLVM_INTRINSICINST_H
#include "llvm/Constants.h"
#include "llvm/Function.h"
#include "llvm/Instructions.h"
#include "llvm/Intrinsics.h"
namespace llvm {
class IntrinsicInst : public CallInst {
IntrinsicInst(); // DO NOT IMPLEMENT
IntrinsicInst(const IntrinsicInst&); // DO NOT IMPLEMENT
void operator=(const IntrinsicInst&); // DO NOT IMPLEMENT
public:
/// StripPointerCasts - This static method strips off any unneeded pointer
/// casts from the specified value, returning the original uncasted value.
/// Note that the returned value is guaranteed to have pointer type.
static Value *StripPointerCasts(Value *Ptr);
};
/// MemIntrinsic - This is the common base class for memset/memcpy/memmove.
///
struct MemIntrinsic : public IntrinsicInst {
Value *getRawDest() const { return const_cast<Value*>(getOperand(1)); }
Value *getLength() const { return const_cast<Value*>(getOperand(3)); }
ConstantInt *getAlignment() const {
return cast<ConstantInt>(const_cast<Value*>(getOperand(4)));
}
/// getDest - This is just like getRawDest, but it strips off any cast
/// instructions that feed it, giving the original input. The returned
/// value is guaranteed to be a pointer.
Value *getDest() const { return StripPointerCasts(getRawDest()); }
/// set* - Set the specified arguments of the instruction.
///
void setDest(Value *Ptr) {
assert(getRawDest()->getType() == Ptr->getType() &&
"setDest called with pointer of wrong type!");
setOperand(1, Ptr);
}
void setLength(Value *L) {
assert(getLength()->getType() == L->getType() &&
"setLength called with value of wrong type!");
setOperand(3, L);
}
void setAlignment(ConstantInt *A) {
assert(getAlignment()->getType() == A->getType() &&
"setAlignment called with value of wrong type!");
setOperand(4, A);
}
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const MemIntrinsic *) { return true; }
static inline bool classof(const CallInst *I) {
if (const Function *CF = I->getCalledFunction())
switch (CF->getIntrinsicID()) {
case Intrinsic::memcpy:
case Intrinsic::memmove:
case Intrinsic::memset:
return true;
default: break;
}
return false;
}
static inline bool classof(const Value *V) {
return isa<CallInst>(V) && classof(cast<CallInst>(V));
}
};
/// MemCpyInst - This class wraps the llvm.memcpy intrinsic.
///
struct MemCpyInst : public MemIntrinsic {
/// get* - Return the arguments to the instruction.
///
Value *getRawSource() const { return const_cast<Value*>(getOperand(2)); }
/// getSource - This is just like getRawSource, but it strips off any cast
/// instructions that feed it, giving the original input. The returned
/// value is guaranteed to be a pointer.
Value *getSource() const { return StripPointerCasts(getRawSource()); }
void setSource(Value *Ptr) {
assert(getRawSource()->getType() == Ptr->getType() &&
"setSource called with pointer of wrong type!");
setOperand(2, Ptr);
}
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const MemCpyInst *) { return true; }
static inline bool classof(const MemIntrinsic *I) {
return I->getCalledFunction()->getIntrinsicID() == Intrinsic::memcpy;
}
static inline bool classof(const CallInst *I) {
if (const Function *CF = I->getCalledFunction())
if (CF->getIntrinsicID() == Intrinsic::memcpy)
return true;
return false;
}
static inline bool classof(const Value *V) {
return isa<CallInst>(V) && classof(cast<CallInst>(V));
}
};
/// MemMoveInst - This class wraps the llvm.memmove intrinsic.
///
struct MemMoveInst : public MemIntrinsic {
/// get* - Return the arguments to the instruction.
///
Value *getRawSource() const { return const_cast<Value*>(getOperand(2)); }
/// getSource - This is just like getRawSource, but it strips off any cast
/// instructions that feed it, giving the original input. The returned
/// value is guaranteed to be a pointer.
Value *getSource() const { return StripPointerCasts(getRawSource()); }
void setSource(Value *Ptr) {
assert(getRawSource()->getType() == Ptr->getType() &&
"setSource called with pointer of wrong type!");
setOperand(2, Ptr);
}
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const MemMoveInst *) { return true; }
static inline bool classof(const MemIntrinsic *I) {
return I->getCalledFunction()->getIntrinsicID() == Intrinsic::memmove;
}
static inline bool classof(const CallInst *I) {
if (const Function *CF = I->getCalledFunction())
if (CF->getIntrinsicID() == Intrinsic::memmove)
return true;
return false;
}
static inline bool classof(const Value *V) {
return isa<CallInst>(V) && classof(cast<CallInst>(V));
}
};
/// MemSetInst - This class wraps the llvm.memcpy intrinsic.
///
struct MemSetInst : public MemIntrinsic {
/// get* - Return the arguments to the instruction.
///
Value *getValue() const { return const_cast<Value*>(getOperand(2)); }
void setValue(Value *Val) {
assert(getValue()->getType() == Val->getType() &&
"setSource called with pointer of wrong type!");
setOperand(2, Val);
}
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const MemSetInst *) { return true; }
static inline bool classof(const MemIntrinsic *I) {
return I->getCalledFunction()->getIntrinsicID() == Intrinsic::memset;
}
static inline bool classof(const CallInst *I) {
if (const Function *CF = I->getCalledFunction())
if (CF->getIntrinsicID() == Intrinsic::memset)
return true;
return false;
}
static inline bool classof(const Value *V) {
return isa<CallInst>(V) && classof(cast<CallInst>(V));
}
};
}
#endif