forked from OSchip/llvm-project
121 lines
3.7 KiB
C++
121 lines
3.7 KiB
C++
//===-- llvm/CodeGen/SDNodeDbgValue.h - SelectionDAG dbg_value --*- 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 declares the SDDbgValue class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_CODEGEN_SELECTIONDAG_SDNODEDBGVALUE_H
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#define LLVM_LIB_CODEGEN_SELECTIONDAG_SDNODEDBGVALUE_H
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#include "llvm/IR/DebugLoc.h"
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#include "llvm/Support/DataTypes.h"
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#include <utility>
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namespace llvm {
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class DIVariable;
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class DIExpression;
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class SDNode;
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class Value;
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/// Holds the information from a dbg_value node through SDISel.
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/// We do not use SDValue here to avoid including its header.
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class SDDbgValue {
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public:
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enum DbgValueKind {
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SDNODE = 0, ///< Value is the result of an expression.
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CONST = 1, ///< Value is a constant.
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FRAMEIX = 2 ///< Value is contents of a stack location.
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};
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private:
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union {
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struct {
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SDNode *Node; ///< Valid for expressions.
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unsigned ResNo; ///< Valid for expressions.
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} s;
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const Value *Const; ///< Valid for constants.
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unsigned FrameIx; ///< Valid for stack objects.
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} u;
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DIVariable *Var;
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DIExpression *Expr;
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DebugLoc DL;
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unsigned Order;
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enum DbgValueKind kind;
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bool IsIndirect;
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bool Invalid = false;
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public:
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/// Constructor for non-constants.
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SDDbgValue(DIVariable *Var, DIExpression *Expr, SDNode *N, unsigned R,
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bool indir, DebugLoc dl, unsigned O)
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: Var(Var), Expr(Expr), DL(std::move(dl)), Order(O), IsIndirect(indir) {
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kind = SDNODE;
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u.s.Node = N;
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u.s.ResNo = R;
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}
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/// Constructor for constants.
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SDDbgValue(DIVariable *Var, DIExpression *Expr, const Value *C, DebugLoc dl,
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unsigned O)
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: Var(Var), Expr(Expr), DL(std::move(dl)), Order(O), IsIndirect(false) {
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kind = CONST;
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u.Const = C;
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}
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/// Constructor for frame indices.
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SDDbgValue(DIVariable *Var, DIExpression *Expr, unsigned FI, DebugLoc dl,
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unsigned O)
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: Var(Var), Expr(Expr), DL(std::move(dl)), Order(O), IsIndirect(false) {
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kind = FRAMEIX;
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u.FrameIx = FI;
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}
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/// Returns the kind.
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DbgValueKind getKind() const { return kind; }
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/// Returns the DIVariable pointer for the variable.
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DIVariable *getVariable() const { return Var; }
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/// Returns the DIExpression pointer for the expression.
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DIExpression *getExpression() const { return Expr; }
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/// Returns the SDNode* for a register ref
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SDNode *getSDNode() const { assert (kind==SDNODE); return u.s.Node; }
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/// Returns the ResNo for a register ref
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unsigned getResNo() const { assert (kind==SDNODE); return u.s.ResNo; }
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/// Returns the Value* for a constant
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const Value *getConst() const { assert (kind==CONST); return u.Const; }
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/// Returns the FrameIx for a stack object
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unsigned getFrameIx() const { assert (kind==FRAMEIX); return u.FrameIx; }
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/// Returns whether this is an indirect value.
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bool isIndirect() const { return IsIndirect; }
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/// Returns the DebugLoc.
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DebugLoc getDebugLoc() const { return DL; }
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/// Returns the SDNodeOrder. This is the order of the preceding node in the
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/// input.
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unsigned getOrder() const { return Order; }
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/// setIsInvalidated / isInvalidated - Setter / getter of the "Invalidated"
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/// property. A SDDbgValue is invalid if the SDNode that produces the value is
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/// deleted.
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void setIsInvalidated() { Invalid = true; }
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bool isInvalidated() const { return Invalid; }
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};
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} // end llvm namespace
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#endif
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