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//===-- llvm/CodeGen/SDNodeDbgValue.h - SelectionDAG dbg_value --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declares the SDDbgValue class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_SDNODEDBGVALUE_H
#define LLVM_CODEGEN_SDNODEDBGVALUE_H
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/DebugLoc.h"
#include "llvm/Support/DataTypes.h"
namespace llvm {
class MDNode;
class SDNode;
class Value;
/// SDDbgValue - Holds the information from a dbg_value node through SDISel.
/// We do not use SDValue here to avoid including its header.
class SDDbgValue {
public:
enum DbgValueKind {
SDNODE = 0, // value is the result of an expression
CONST = 1, // value is a constant
FRAMEIX = 2 // value is contents of a stack location
};
private:
enum DbgValueKind kind;
union {
struct {
SDNode *Node; // valid for expressions
unsigned ResNo; // valid for expressions
} s;
const Value *Const; // valid for constants
unsigned FrameIx; // valid for stack objects
} u;
MDNode *mdPtr;
uint64_t Offset;
DebugLoc DL;
unsigned Order;
bool Invalid;
public:
// Constructor for non-constants.
SDDbgValue(MDNode *mdP, SDNode *N, unsigned R, uint64_t off, DebugLoc dl,
unsigned O) : mdPtr(mdP), Offset(off), DL(dl), Order(O),
Invalid(false) {
kind = SDNODE;
u.s.Node = N;
u.s.ResNo = R;
}
// Constructor for constants.
SDDbgValue(MDNode *mdP, const Value *C, uint64_t off, DebugLoc dl,
unsigned O) :
mdPtr(mdP), Offset(off), DL(dl), Order(O), Invalid(false) {
kind = CONST;
u.Const = C;
}
// Constructor for frame indices.
SDDbgValue(MDNode *mdP, unsigned FI, uint64_t off, DebugLoc dl, unsigned O) :
mdPtr(mdP), Offset(off), DL(dl), Order(O), Invalid(false) {
kind = FRAMEIX;
u.FrameIx = FI;
}
// Returns the kind.
DbgValueKind getKind() { return kind; }
// Returns the MDNode pointer.
MDNode *getMDPtr() { return mdPtr; }
// Returns the SDNode* for a register ref
SDNode *getSDNode() { assert (kind==SDNODE); return u.s.Node; }
// Returns the ResNo for a register ref
unsigned getResNo() { assert (kind==SDNODE); return u.s.ResNo; }
// Returns the Value* for a constant
const Value *getConst() { assert (kind==CONST); return u.Const; }
// Returns the FrameIx for a stack object
unsigned getFrameIx() { assert (kind==FRAMEIX); return u.FrameIx; }
// Returns the offset.
uint64_t getOffset() { return Offset; }
// Returns the DebugLoc.
DebugLoc getDebugLoc() { return DL; }
// Returns the SDNodeOrder. This is the order of the preceding node in the
// input.
unsigned getOrder() { return Order; }
// setIsInvalidated / isInvalidated - Setter / getter of the "Invalidated"
// property. A SDDbgValue is invalid if the SDNode that produces the value is
// deleted.
void setIsInvalidated() { Invalid = true; }
bool isInvalidated() { return Invalid; }
};
} // end llvm namespace
#endif
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