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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_LIB_CODEGEN_SELECTIONDAG_SDNODEDBGVALUE_H
#define LLVM_LIB_CODEGEN_SELECTIONDAG_SDNODEDBGVALUE_H
#include "llvm/IR/DebugLoc.h"
#include "llvm/Support/DataTypes.h"
#include <utility>
namespace llvm {
class DIVariable;
class DIExpression;
class SDNode;
class Value;
/// 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:
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;
DIVariable *Var;
DIExpression *Expr;
DebugLoc DL;
unsigned Order;
enum DbgValueKind kind;
bool IsIndirect;
bool Invalid = false;
public:
/// Constructor for non-constants.
SDDbgValue(DIVariable *Var, DIExpression *Expr, SDNode *N, unsigned R,
bool indir, DebugLoc dl, unsigned O)
: Var(Var), Expr(Expr), DL(std::move(dl)), Order(O), IsIndirect(indir) {
kind = SDNODE;
u.s.Node = N;
u.s.ResNo = R;
}
/// Constructor for constants.
SDDbgValue(DIVariable *Var, DIExpression *Expr, const Value *C, DebugLoc dl,
unsigned O)
: Var(Var), Expr(Expr), DL(std::move(dl)), Order(O), IsIndirect(false) {
kind = CONST;
u.Const = C;
}
/// Constructor for frame indices.
SDDbgValue(DIVariable *Var, DIExpression *Expr, unsigned FI, DebugLoc dl,
unsigned O)
: Var(Var), Expr(Expr), DL(std::move(dl)), Order(O), IsIndirect(false) {
kind = FRAMEIX;
u.FrameIx = FI;
}
/// Returns the kind.
DbgValueKind getKind() const { return kind; }
/// Returns the DIVariable pointer for the variable.
DIVariable *getVariable() const { return Var; }
/// Returns the DIExpression pointer for the expression.
DIExpression *getExpression() const { return Expr; }
/// Returns the SDNode* for a register ref
SDNode *getSDNode() const { assert (kind==SDNODE); return u.s.Node; }
/// Returns the ResNo for a register ref
unsigned getResNo() const { assert (kind==SDNODE); return u.s.ResNo; }
/// Returns the Value* for a constant
const Value *getConst() const { assert (kind==CONST); return u.Const; }
/// Returns the FrameIx for a stack object
unsigned getFrameIx() const { assert (kind==FRAMEIX); return u.FrameIx; }
/// Returns whether this is an indirect value.
bool isIndirect() const { return IsIndirect; }
/// Returns the DebugLoc.
DebugLoc getDebugLoc() const { return DL; }
/// Returns the SDNodeOrder. This is the order of the preceding node in the
/// input.
unsigned getOrder() const { 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() const { return Invalid; }
};
} // end llvm namespace
#endif
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