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0ff39b3feb
- 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
313 lines
12 KiB
C++
313 lines
12 KiB
C++
//===-- llvm/IntrinsicInst.h - Intrinsic Instruction Wrappers ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines classes that make it really easy to deal with intrinsic
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// functions with the isa/dyncast family of functions. In particular, this
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// allows you to do things like:
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//
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// if (MemCpyInst *MCI = dyn_cast<MemCpyInst>(Inst))
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// ... MCI->getDest() ... MCI->getSource() ...
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//
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// All intrinsic function calls are instances of the call instruction, so these
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// are all subclasses of the CallInst class. Note that none of these classes
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// has state or virtual methods, which is an important part of this gross/neat
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// hack working.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_INTRINSICINST_H
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#define LLVM_INTRINSICINST_H
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#include "llvm/Constants.h"
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#include "llvm/Function.h"
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#include "llvm/Instructions.h"
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#include "llvm/Intrinsics.h"
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namespace llvm {
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/// IntrinsicInst - A useful wrapper class for inspecting calls to intrinsic
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/// functions. This allows the standard isa/dyncast/cast functionality to
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/// work with calls to intrinsic functions.
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class IntrinsicInst : public CallInst {
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IntrinsicInst(); // DO NOT IMPLEMENT
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IntrinsicInst(const IntrinsicInst&); // DO NOT IMPLEMENT
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void operator=(const IntrinsicInst&); // DO NOT IMPLEMENT
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public:
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/// getIntrinsicID - Return the intrinsic ID of this intrinsic.
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///
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Intrinsic::ID getIntrinsicID() const {
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return (Intrinsic::ID)getCalledFunction()->getIntrinsicID();
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}
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const IntrinsicInst *) { return true; }
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static inline bool classof(const CallInst *I) {
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if (const Function *CF = I->getCalledFunction())
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return CF->getIntrinsicID() != 0;
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return false;
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}
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static inline bool classof(const Value *V) {
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return isa<CallInst>(V) && classof(cast<CallInst>(V));
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}
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};
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/// DbgInfoIntrinsic - This is the common base class for debug info intrinsics
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///
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struct DbgInfoIntrinsic : public IntrinsicInst {
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const DbgInfoIntrinsic *) { return true; }
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static inline bool classof(const IntrinsicInst *I) {
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switch (I->getIntrinsicID()) {
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case Intrinsic::dbg_stoppoint:
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case Intrinsic::dbg_func_start:
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case Intrinsic::dbg_region_start:
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case Intrinsic::dbg_region_end:
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case Intrinsic::dbg_declare:
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return true;
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default: return false;
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}
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}
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static inline bool classof(const Value *V) {
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return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
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}
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static Value *StripCast(Value *C);
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};
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/// DbgStopPointInst - This represents the llvm.dbg.stoppoint instruction.
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///
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struct DbgStopPointInst : public DbgInfoIntrinsic {
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Value *getLineValue() const { return const_cast<Value*>(getOperand(1)); }
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Value *getColumnValue() const { return const_cast<Value*>(getOperand(2)); }
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Value *getContext() const {
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return StripCast(getOperand(3));
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}
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unsigned getLine() const {
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return unsigned(cast<ConstantInt>(getOperand(1))->getZExtValue());
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}
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unsigned getColumn() const {
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return unsigned(cast<ConstantInt>(getOperand(2))->getZExtValue());
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}
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Value* getFileName() const;
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Value* getDirectory() const;
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const DbgStopPointInst *) { return true; }
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static inline bool classof(const IntrinsicInst *I) {
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return I->getIntrinsicID() == Intrinsic::dbg_stoppoint;
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}
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static inline bool classof(const Value *V) {
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return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
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}
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};
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/// DbgFuncStartInst - This represents the llvm.dbg.func.start instruction.
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///
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struct DbgFuncStartInst : public DbgInfoIntrinsic {
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Value *getSubprogram() const { return StripCast(getOperand(1)); }
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const DbgFuncStartInst *) { return true; }
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static inline bool classof(const IntrinsicInst *I) {
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return I->getIntrinsicID() == Intrinsic::dbg_func_start;
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}
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static inline bool classof(const Value *V) {
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return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
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}
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};
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/// DbgRegionStartInst - This represents the llvm.dbg.region.start
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/// instruction.
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struct DbgRegionStartInst : public DbgInfoIntrinsic {
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Value *getContext() const { return StripCast(getOperand(1)); }
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const DbgRegionStartInst *) { return true; }
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static inline bool classof(const IntrinsicInst *I) {
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return I->getIntrinsicID() == Intrinsic::dbg_region_start;
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}
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static inline bool classof(const Value *V) {
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return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
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}
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};
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/// DbgRegionEndInst - This represents the llvm.dbg.region.end instruction.
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///
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struct DbgRegionEndInst : public DbgInfoIntrinsic {
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Value *getContext() const { return StripCast(getOperand(1)); }
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const DbgRegionEndInst *) { return true; }
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static inline bool classof(const IntrinsicInst *I) {
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return I->getIntrinsicID() == Intrinsic::dbg_region_end;
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}
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static inline bool classof(const Value *V) {
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return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
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}
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};
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/// DbgDeclareInst - This represents the llvm.dbg.declare instruction.
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///
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struct DbgDeclareInst : public DbgInfoIntrinsic {
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Value *getAddress() const { return getOperand(1); }
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Value *getVariable() const { return StripCast(getOperand(2)); }
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const DbgDeclareInst *) { return true; }
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static inline bool classof(const IntrinsicInst *I) {
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return I->getIntrinsicID() == Intrinsic::dbg_declare;
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}
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static inline bool classof(const Value *V) {
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return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
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}
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};
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/// MemIntrinsic - This is the common base class for memset/memcpy/memmove.
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///
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struct MemIntrinsic : public IntrinsicInst {
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Value *getRawDest() const { return const_cast<Value*>(getOperand(1)); }
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Value *getLength() const { return const_cast<Value*>(getOperand(3)); }
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ConstantInt *getAlignment() const {
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return cast<ConstantInt>(const_cast<Value*>(getOperand(4)));
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}
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/// getDest - This is just like getRawDest, but it strips off any cast
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/// instructions that feed it, giving the original input. The returned
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/// value is guaranteed to be a pointer.
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Value *getDest() const { return getRawDest()->stripPointerCasts(); }
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/// set* - Set the specified arguments of the instruction.
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///
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void setDest(Value *Ptr) {
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assert(getRawDest()->getType() == Ptr->getType() &&
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"setDest called with pointer of wrong type!");
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setOperand(1, Ptr);
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}
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void setLength(Value *L) {
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assert(getLength()->getType() == L->getType() &&
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"setLength called with value of wrong type!");
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setOperand(3, L);
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}
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void setAlignment(ConstantInt *A) {
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assert(getAlignment()->getType() == A->getType() &&
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"setAlignment called with value of wrong type!");
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setOperand(4, A);
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}
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const MemIntrinsic *) { return true; }
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static inline bool classof(const IntrinsicInst *I) {
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switch (I->getIntrinsicID()) {
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case Intrinsic::memcpy_i32:
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case Intrinsic::memcpy_i64:
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case Intrinsic::memmove_i32:
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case Intrinsic::memmove_i64:
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case Intrinsic::memset_i32:
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case Intrinsic::memset_i64:
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return true;
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default: return false;
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}
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}
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static inline bool classof(const Value *V) {
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return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
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}
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};
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/// MemCpyInst - This class wraps the llvm.memcpy intrinsic.
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///
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struct MemCpyInst : public MemIntrinsic {
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/// get* - Return the arguments to the instruction.
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///
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Value *getRawSource() const { return const_cast<Value*>(getOperand(2)); }
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/// getSource - This is just like getRawSource, but it strips off any cast
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/// instructions that feed it, giving the original input. The returned
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/// value is guaranteed to be a pointer.
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Value *getSource() const { return getRawSource()->stripPointerCasts(); }
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void setSource(Value *Ptr) {
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assert(getRawSource()->getType() == Ptr->getType() &&
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"setSource called with pointer of wrong type!");
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setOperand(2, Ptr);
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}
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const MemCpyInst *) { return true; }
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static inline bool classof(const IntrinsicInst *I) {
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return I->getIntrinsicID() == Intrinsic::memcpy_i32 ||
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I->getIntrinsicID() == Intrinsic::memcpy_i64;
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}
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static inline bool classof(const Value *V) {
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return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
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}
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};
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/// MemMoveInst - This class wraps the llvm.memmove intrinsic.
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///
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struct MemMoveInst : public MemIntrinsic {
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/// get* - Return the arguments to the instruction.
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///
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Value *getRawSource() const { return const_cast<Value*>(getOperand(2)); }
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/// getSource - This is just like getRawSource, but it strips off any cast
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/// instructions that feed it, giving the original input. The returned
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/// value is guaranteed to be a pointer.
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Value *getSource() const { return getRawSource()->stripPointerCasts(); }
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void setSource(Value *Ptr) {
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assert(getRawSource()->getType() == Ptr->getType() &&
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"setSource called with pointer of wrong type!");
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setOperand(2, Ptr);
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}
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const MemMoveInst *) { return true; }
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static inline bool classof(const IntrinsicInst *I) {
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return I->getIntrinsicID() == Intrinsic::memmove_i32 ||
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I->getIntrinsicID() == Intrinsic::memmove_i64;
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}
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static inline bool classof(const Value *V) {
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return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
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}
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};
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/// MemSetInst - This class wraps the llvm.memset intrinsic.
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///
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struct MemSetInst : public MemIntrinsic {
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/// get* - Return the arguments to the instruction.
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///
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Value *getValue() const { return const_cast<Value*>(getOperand(2)); }
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void setValue(Value *Val) {
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assert(getValue()->getType() == Val->getType() &&
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"setSource called with pointer of wrong type!");
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setOperand(2, Val);
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}
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const MemSetInst *) { return true; }
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static inline bool classof(const IntrinsicInst *I) {
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return I->getIntrinsicID() == Intrinsic::memset_i32 ||
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I->getIntrinsicID() == Intrinsic::memset_i64;
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}
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static inline bool classof(const Value *V) {
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return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
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}
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};
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}
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#endif
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