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Add data structure to define and track debug location during codegen.
llvm-svn: 63008
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include/llvm/CodeGen/DebugLoc.h
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109
include/llvm/CodeGen/DebugLoc.h
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//===---- llvm/CodeGen/DebugLoc.h - Debug Location Information --*- 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 a number of light weight data structures used by the code
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// generator to describe and track debug location information.
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#ifndef LLVM_CODEGEN_DEBUGLOC_H
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#define LLVM_CODEGEN_DEBUGLOC_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/StringMap.h"
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#include <vector>
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namespace llvm {
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/// DebugLocTuple - Debug location tuple of filename id, line and column.
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///
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struct DebugLocTuple {
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unsigned FileId, Line, Col;
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DebugLocTuple(unsigned fi, unsigned l, unsigned c)
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: FileId(fi), Line(l), Col(c) {};
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};
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/// DebugLoc - Debug location id. This is carried by SDNode and
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/// MachineInstr to index into a vector of unique debug location tuples.
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class DebugLoc {
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unsigned Idx;
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public:
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DebugLoc() : Idx(~0U) {}
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static DebugLoc getNoDebugLoc() { DebugLoc L; L.Idx = 0; return L; }
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static DebugLoc get(unsigned idx) { DebugLoc L; L.Idx = idx; return L; }
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bool isInvalid() { return Idx == ~0U; }
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bool isUnknown() { return Idx == 0; }
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};
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struct DebugLocTupleDenseMapInfo {
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static inline DebugLocTuple getEmptyKey() {
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return DebugLocTuple(~0U, ~0U, ~0U);
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}
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static inline DebugLocTuple getTombstoneKey() {
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return DebugLocTuple(~1U, ~1U, ~1U);
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}
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static unsigned getHashValue(const DebugLocTuple &Val) {
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return DenseMapInfo<unsigned>::getHashValue(Val.FileId) ^
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DenseMapInfo<unsigned>::getHashValue(Val.Line) ^
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DenseMapInfo<unsigned>::getHashValue(Val.Col);
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}
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static bool isEqual(const DebugLocTuple &LHS, const DebugLocTuple &RHS) {
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return LHS.FileId == RHS.FileId &&
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LHS.Line == RHS.Line &&
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LHS.Col == RHS.Col;
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}
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static bool isPod() { return true; }
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};
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typedef DenseMap<DebugLocTuple, unsigned, DebugLocTupleDenseMapInfo>
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DebugIdMapType;
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/// DebugLocTracker - This class tracks debug location information.
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///
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struct DebugLocTracker {
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// NumFilenames - Size of the DebugFilenames vector.
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//
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unsigned NumFilenames;
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// DebugFilenames - A vector of unique file names.
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//
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std::vector<std::string> DebugFilenames;
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// DebugFilenamesMap - File name to DebugFilenames index map.
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//
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StringMap<unsigned> DebugFilenamesMap;
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// NumDebugLocations - Size of the DebugLocations vector.
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unsigned NumDebugLocations;
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// DebugLocations - A vector of unique DebugLocTuple's.
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//
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std::vector<DebugLocTuple> DebugLocations;
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// DebugIdsMap - This maps DebugLocTuple's to indices into
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// DebugLocations vector.
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DebugIdMapType DebugIdMap;
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DebugLocTracker() : NumFilenames(0), NumDebugLocations(0) {}
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~DebugLocTracker() {
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NumFilenames = 0;
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DebugFilenames.clear();
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DebugFilenamesMap.clear();
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DebugLocations.clear();
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DebugIdMap.clear();
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}
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};
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} // end namespace llvm
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#endif /* LLVM_CODEGEN_DEBUGLOC_H */
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@ -19,6 +19,7 @@
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#define LLVM_CODEGEN_MACHINEFUNCTION_H
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#include "llvm/ADT/ilist.h"
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#include "llvm/CodeGen/DebugLoc.h"
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#include "llvm/CodeGen/MachineBasicBlock.h"
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#include "llvm/Support/Annotation.h"
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#include "llvm/Support/Allocator.h"
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@ -27,11 +28,11 @@
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namespace llvm {
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class Function;
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class TargetMachine;
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class MachineRegisterInfo;
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class MachineFrameInfo;
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class MachineConstantPool;
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class MachineJumpTableInfo;
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class TargetMachine;
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template <>
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struct ilist_traits<MachineBasicBlock>
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@ -94,6 +95,9 @@ class MachineFunction : private Annotation {
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typedef ilist<MachineBasicBlock> BasicBlockListType;
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BasicBlockListType BasicBlocks;
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// Tracks debug locations.
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DebugLocTracker DebugLocInfo;
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public:
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MachineFunction(const Function *Fn, const TargetMachine &TM);
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~MachineFunction();
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@ -302,6 +306,15 @@ public:
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/// DeleteMachineBasicBlock - Delete the given MachineBasicBlock.
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///
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void DeleteMachineBasicBlock(MachineBasicBlock *MBB);
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//===--------------------------------------------------------------------===//
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// Debug location.
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//
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/// lookUpDebugLocId - Look up the DebugLocTuple index with the given
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/// filename, line, and column. It may add a new filename and / or
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/// a new DebugLocTuple.
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unsigned lookUpDebugLocId(const char *Filename, unsigned Line, unsigned Col);
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};
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//===--------------------------------------------------------------------===//
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@ -378,6 +378,33 @@ MachineFunction& MachineFunction::get(const Function *F)
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return *mc;
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}
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/// lookUpDebugLocId - Look up the DebugLocTuple index with the given
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/// filename, line, and column. It may add a new filename and / or
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/// a new DebugLocTuple.
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unsigned MachineFunction::lookUpDebugLocId(const char *Filename, unsigned Line,
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unsigned Col) {
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unsigned FileId;
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StringMap<unsigned>::iterator I =
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DebugLocInfo.DebugFilenamesMap.find(Filename);
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if (I != DebugLocInfo.DebugFilenamesMap.end())
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FileId = I->second;
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else {
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// Add a new filename.
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FileId = DebugLocInfo.NumFilenames++;
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DebugLocInfo.DebugFilenames.push_back(Filename);
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DebugLocInfo.DebugFilenamesMap[Filename] = FileId;
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}
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struct DebugLocTuple Tuple(FileId, Line, Col);
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DebugIdMapType::iterator II = DebugLocInfo.DebugIdMap.find(Tuple);
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if (II != DebugLocInfo.DebugIdMap.end())
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return II->second;
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// Add a new tuple.
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DebugLocInfo.DebugLocations.push_back(Tuple);
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DebugLocInfo.DebugIdMap[Tuple] = DebugLocInfo.NumDebugLocations;
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return DebugLocInfo.NumDebugLocations++;
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}
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//===----------------------------------------------------------------------===//
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// MachineFrameInfo implementation
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//===----------------------------------------------------------------------===//
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