llvm-6502/include/llvm/IntrinsicInst.h
Evan Cheng 0ff39b3feb - Re-apply 52748 and friends with fix. GetConstantStringInfo() returns an empty string for ConstantAggregateZero case which surprises selectiondag.
- Correctly handle memcpy from constant string which is zero-initialized.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52891 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-30 07:31:25 +00:00

313 lines
12 KiB
C++

//===-- llvm/IntrinsicInst.h - Intrinsic Instruction Wrappers ---*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file 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 {
/// IntrinsicInst - A useful wrapper class for inspecting calls to intrinsic
/// functions. This allows the standard isa/dyncast/cast functionality to
/// work with calls to intrinsic functions.
class IntrinsicInst : public CallInst {
IntrinsicInst(); // DO NOT IMPLEMENT
IntrinsicInst(const IntrinsicInst&); // DO NOT IMPLEMENT
void operator=(const IntrinsicInst&); // DO NOT IMPLEMENT
public:
/// getIntrinsicID - Return the intrinsic ID of this intrinsic.
///
Intrinsic::ID getIntrinsicID() const {
return (Intrinsic::ID)getCalledFunction()->getIntrinsicID();
}
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const IntrinsicInst *) { return true; }
static inline bool classof(const CallInst *I) {
if (const Function *CF = I->getCalledFunction())
return CF->getIntrinsicID() != 0;
return false;
}
static inline bool classof(const Value *V) {
return isa<CallInst>(V) && classof(cast<CallInst>(V));
}
};
/// DbgInfoIntrinsic - This is the common base class for debug info intrinsics
///
struct DbgInfoIntrinsic : public IntrinsicInst {
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const DbgInfoIntrinsic *) { return true; }
static inline bool classof(const IntrinsicInst *I) {
switch (I->getIntrinsicID()) {
case Intrinsic::dbg_stoppoint:
case Intrinsic::dbg_func_start:
case Intrinsic::dbg_region_start:
case Intrinsic::dbg_region_end:
case Intrinsic::dbg_declare:
return true;
default: return false;
}
}
static inline bool classof(const Value *V) {
return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
}
static Value *StripCast(Value *C);
};
/// DbgStopPointInst - This represents the llvm.dbg.stoppoint instruction.
///
struct DbgStopPointInst : public DbgInfoIntrinsic {
Value *getLineValue() const { return const_cast<Value*>(getOperand(1)); }
Value *getColumnValue() const { return const_cast<Value*>(getOperand(2)); }
Value *getContext() const {
return StripCast(getOperand(3));
}
unsigned getLine() const {
return unsigned(cast<ConstantInt>(getOperand(1))->getZExtValue());
}
unsigned getColumn() const {
return unsigned(cast<ConstantInt>(getOperand(2))->getZExtValue());
}
Value* getFileName() const;
Value* getDirectory() const;
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const DbgStopPointInst *) { return true; }
static inline bool classof(const IntrinsicInst *I) {
return I->getIntrinsicID() == Intrinsic::dbg_stoppoint;
}
static inline bool classof(const Value *V) {
return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
}
};
/// DbgFuncStartInst - This represents the llvm.dbg.func.start instruction.
///
struct DbgFuncStartInst : public DbgInfoIntrinsic {
Value *getSubprogram() const { return StripCast(getOperand(1)); }
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const DbgFuncStartInst *) { return true; }
static inline bool classof(const IntrinsicInst *I) {
return I->getIntrinsicID() == Intrinsic::dbg_func_start;
}
static inline bool classof(const Value *V) {
return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
}
};
/// DbgRegionStartInst - This represents the llvm.dbg.region.start
/// instruction.
struct DbgRegionStartInst : public DbgInfoIntrinsic {
Value *getContext() const { return StripCast(getOperand(1)); }
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const DbgRegionStartInst *) { return true; }
static inline bool classof(const IntrinsicInst *I) {
return I->getIntrinsicID() == Intrinsic::dbg_region_start;
}
static inline bool classof(const Value *V) {
return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
}
};
/// DbgRegionEndInst - This represents the llvm.dbg.region.end instruction.
///
struct DbgRegionEndInst : public DbgInfoIntrinsic {
Value *getContext() const { return StripCast(getOperand(1)); }
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const DbgRegionEndInst *) { return true; }
static inline bool classof(const IntrinsicInst *I) {
return I->getIntrinsicID() == Intrinsic::dbg_region_end;
}
static inline bool classof(const Value *V) {
return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
}
};
/// DbgDeclareInst - This represents the llvm.dbg.declare instruction.
///
struct DbgDeclareInst : public DbgInfoIntrinsic {
Value *getAddress() const { return getOperand(1); }
Value *getVariable() const { return StripCast(getOperand(2)); }
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const DbgDeclareInst *) { return true; }
static inline bool classof(const IntrinsicInst *I) {
return I->getIntrinsicID() == Intrinsic::dbg_declare;
}
static inline bool classof(const Value *V) {
return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
}
};
/// 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 getRawDest()->stripPointerCasts(); }
/// 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 IntrinsicInst *I) {
switch (I->getIntrinsicID()) {
case Intrinsic::memcpy_i32:
case Intrinsic::memcpy_i64:
case Intrinsic::memmove_i32:
case Intrinsic::memmove_i64:
case Intrinsic::memset_i32:
case Intrinsic::memset_i64:
return true;
default: return false;
}
}
static inline bool classof(const Value *V) {
return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(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 getRawSource()->stripPointerCasts(); }
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 IntrinsicInst *I) {
return I->getIntrinsicID() == Intrinsic::memcpy_i32 ||
I->getIntrinsicID() == Intrinsic::memcpy_i64;
}
static inline bool classof(const Value *V) {
return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(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 getRawSource()->stripPointerCasts(); }
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 IntrinsicInst *I) {
return I->getIntrinsicID() == Intrinsic::memmove_i32 ||
I->getIntrinsicID() == Intrinsic::memmove_i64;
}
static inline bool classof(const Value *V) {
return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
}
};
/// MemSetInst - This class wraps the llvm.memset 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 IntrinsicInst *I) {
return I->getIntrinsicID() == Intrinsic::memset_i32 ||
I->getIntrinsicID() == Intrinsic::memset_i64;
}
static inline bool classof(const Value *V) {
return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
}
};
}
#endif