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llvm-mirror/include/llvm/IntrinsicInst.h
Nick Lewycky 708df45c84 Teach LazyValueInfo that allocas aren't NULL. Over all of llvm-test, this saves
half a million non-local queries, each of which would otherwise have triggered a
linear scan over a basic block.

Also fix a fixme for memory intrinsics which dereference pointers. With this,
we prove that a pointer is non-null because it was dereferenced by an intrinsic
112 times in llvm-test.

llvm-svn: 123533
2011-01-15 09:16:12 +00:00

307 lines
11 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
///
class DbgInfoIntrinsic : public IntrinsicInst {
public:
// 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_declare:
case Intrinsic::dbg_value:
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);
};
/// DbgDeclareInst - This represents the llvm.dbg.declare instruction.
///
class DbgDeclareInst : public DbgInfoIntrinsic {
public:
Value *getAddress() const;
MDNode *getVariable() const { return cast<MDNode>(getArgOperand(1)); }
// 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));
}
};
/// DbgValueInst - This represents the llvm.dbg.value instruction.
///
class DbgValueInst : public DbgInfoIntrinsic {
public:
const Value *getValue() const;
Value *getValue();
uint64_t getOffset() const {
return cast<ConstantInt>(
const_cast<Value*>(getArgOperand(1)))->getZExtValue();
}
MDNode *getVariable() const { return cast<MDNode>(getArgOperand(2)); }
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const DbgValueInst *) { return true; }
static inline bool classof(const IntrinsicInst *I) {
return I->getIntrinsicID() == Intrinsic::dbg_value;
}
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.
///
class MemIntrinsic : public IntrinsicInst {
public:
Value *getRawDest() const { return const_cast<Value*>(getArgOperand(0)); }
Value *getLength() const { return const_cast<Value*>(getArgOperand(2)); }
ConstantInt *getAlignmentCst() const {
return cast<ConstantInt>(const_cast<Value*>(getArgOperand(3)));
}
unsigned getAlignment() const {
return getAlignmentCst()->getZExtValue();
}
ConstantInt *getVolatileCst() const {
return cast<ConstantInt>(const_cast<Value*>(getArgOperand(4)));
}
bool isVolatile() const {
return !getVolatileCst()->isZero();
}
unsigned getAddressSpace() const {
return cast<PointerType>(getRawDest()->getType())->getAddressSpace();
}
/// 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!");
setArgOperand(0, Ptr);
}
void setLength(Value *L) {
assert(getLength()->getType() == L->getType() &&
"setLength called with value of wrong type!");
setArgOperand(2, L);
}
void setAlignment(Constant* A) {
setArgOperand(3, A);
}
void setVolatile(Constant* V) {
setArgOperand(4, V);
}
const Type *getAlignmentType() const {
return getArgOperand(3)->getType();
}
// 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:
case Intrinsic::memmove:
case Intrinsic::memset:
return true;
default: return false;
}
}
static inline bool classof(const Value *V) {
return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
}
};
/// MemSetInst - This class wraps the llvm.memset intrinsic.
///
class MemSetInst : public MemIntrinsic {
public:
/// get* - Return the arguments to the instruction.
///
Value *getValue() const { return const_cast<Value*>(getArgOperand(1)); }
void setValue(Value *Val) {
assert(getValue()->getType() == Val->getType() &&
"setValue called with value of wrong type!");
setArgOperand(1, 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;
}
static inline bool classof(const Value *V) {
return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
}
};
/// MemTransferInst - This class wraps the llvm.memcpy/memmove intrinsics.
///
class MemTransferInst : public MemIntrinsic {
public:
/// get* - Return the arguments to the instruction.
///
Value *getRawSource() const { return const_cast<Value*>(getArgOperand(1)); }
/// 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!");
setArgOperand(1, Ptr);
}
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const MemTransferInst *) { return true; }
static inline bool classof(const IntrinsicInst *I) {
return I->getIntrinsicID() == Intrinsic::memcpy ||
I->getIntrinsicID() == Intrinsic::memmove;
}
static inline bool classof(const Value *V) {
return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
}
};
/// MemCpyInst - This class wraps the llvm.memcpy intrinsic.
///
class MemCpyInst : public MemTransferInst {
public:
// 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;
}
static inline bool classof(const Value *V) {
return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
}
};
/// MemMoveInst - This class wraps the llvm.memmove intrinsic.
///
class MemMoveInst : public MemTransferInst {
public:
// 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;
}
static inline bool classof(const Value *V) {
return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
}
};
/// EHExceptionInst - This represents the llvm.eh.exception instruction.
///
class EHExceptionInst : public IntrinsicInst {
public:
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const EHExceptionInst *) { return true; }
static inline bool classof(const IntrinsicInst *I) {
return I->getIntrinsicID() == Intrinsic::eh_exception;
}
static inline bool classof(const Value *V) {
return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
}
};
/// EHSelectorInst - This represents the llvm.eh.selector instruction.
///
class EHSelectorInst : public IntrinsicInst {
public:
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const EHSelectorInst *) { return true; }
static inline bool classof(const IntrinsicInst *I) {
return I->getIntrinsicID() == Intrinsic::eh_selector;
}
static inline bool classof(const Value *V) {
return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
}
};
}
#endif