forked from OSchip/llvm-project
128 lines
3.8 KiB
C++
128 lines
3.8 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 MDNode;
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class SDNode;
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class Value;
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/// SDDbgValue - 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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MDNode *Var;
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MDNode *Expr;
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uint64_t Offset;
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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(MDNode *Var, MDNode *Expr, SDNode *N, unsigned R, bool indir,
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uint64_t off, DebugLoc dl, unsigned O)
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: Var(Var), Expr(Expr), Offset(off), DL(std::move(dl)), Order(O),
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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(MDNode *Var, MDNode *Expr, const Value *C, uint64_t off,
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DebugLoc dl, unsigned O)
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: Var(Var), Expr(Expr), Offset(off), DL(std::move(dl)), Order(O),
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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(MDNode *Var, MDNode *Expr, unsigned FI, uint64_t off, DebugLoc dl,
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unsigned O)
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: Var(Var), Expr(Expr), Offset(off), DL(std::move(dl)), Order(O),
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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 MDNode pointer for the variable.
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MDNode *getVariable() const { return Var; }
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// Returns the MDNode pointer for the expression.
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MDNode *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 offset.
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uint64_t getOffset() const { return Offset; }
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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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