[RemoveDIs][NFC] Rename DPMarker->DbgMarker (llvm#85931)

Another trivial rename patch, the last big one for now, which renamed
DPMarkers to DbgMarkers. This required the field `DbgMarker` in
`Instruction` to be renamed to `DebugMarker` to avoid a clash, but
otherwise was a simple string substitution of `s/DPMarker/DbgMarker` and
a manual renaming of `DPM` to `DM` in the few places where that acronym
was used for debug markers.

Author: SLTozer

llvm/docs/RemoveDIsDebugInfo.md

@@ -82,18 +82,18 @@ Like so:
                          |
                          |
                          v
-                  +------------+
-          <-------+  DPMarker  |<-------
-         /        +------------+        \
-        /                                \
-       /                                  \
-      v                                    ^
+                  +-------------+
+          <-------+  DbgMarker  |<-------
+         /        +-------------+        \
+        /                                 \
+       /                                   \
+      v                                     ^
  +-------------+    +-------------+   +-------------+
  |  DbgRecord  +--->|  DbgRecord  +-->|  DbgRecord  |
  +-------------+    +-------------+   +-------------+
 ```
 
-Each instruction has a pointer to a `DPMarker` (which will become optional), that contains a list of `DbgRecord` objects. No debugging records appear in the instruction list at all. `DbgRecord`s have a parent pointer to their owning `DPMarker`, and each `DPMarker` has a pointer back to it's owning instruction.
+Each instruction has a pointer to a `DbgMarker` (which will become optional), that contains a list of `DbgRecord` objects. No debugging records appear in the instruction list at all. `DbgRecord`s have a parent pointer to their owning `DbgMarker`, and each `DbgMarker` has a pointer back to it's owning instruction.
 
 Not shown are the links from DbgRecord to other parts of the `Value`/`Metadata` hierachy: `DbgRecord` subclasses have tracking pointers to the DIMetadata that they use, and `DbgVariableRecord` has references to `Value`s that are stored in a `DebugValueUser` base class. This refers to a `ValueAsMetadata` object referring to `Value`s, via the `TrackingMetadata` facility.
 

llvm/include/llvm/IR/BasicBlock.h

@@ -39,7 +39,7 @@ class Module;
 class PHINode;
 class ValueSymbolTable;
 class DbgVariableRecord;
-class DPMarker;
+class DbgMarker;
 
 /// LLVM Basic Block Representation
 ///
@@ -72,18 +72,18 @@ class BasicBlock final : public Value, // Basic blocks are data objects also
   Function *Parent;
 
 public:
-  /// Attach a DPMarker to the given instruction. Enables the storage of any
+  /// Attach a DbgMarker to the given instruction. Enables the storage of any
   /// debug-info at this position in the program.
-  DPMarker *createMarker(Instruction *I);
-  DPMarker *createMarker(InstListType::iterator It);
+  DbgMarker *createMarker(Instruction *I);
+  DbgMarker *createMarker(InstListType::iterator It);
 
   /// Convert variable location debugging information stored in dbg.value
-  /// intrinsics into DPMarkers / DbgRecords. Deletes all dbg.values in
+  /// intrinsics into DbgMarkers / DbgRecords. Deletes all dbg.values in
   /// the process and sets IsNewDbgInfoFormat = true. Only takes effect if
   /// the UseNewDbgInfoFormat LLVM command line option is given.
   void convertToNewDbgValues();
 
-  /// Convert variable location debugging information stored in DPMarkers and
+  /// Convert variable location debugging information stored in DbgMarkers and
   /// DbgRecords into the dbg.value intrinsic representation. Sets
   /// IsNewDbgInfoFormat = false.
   void convertFromNewDbgValues();
@@ -97,28 +97,28 @@ class BasicBlock final : public Value, // Basic blocks are data objects also
   /// instruction of this block. These are equivalent to dbg.value intrinsics
   /// that exist at the end of a basic block with no terminator (a transient
   /// state that occurs regularly).
-  void setTrailingDbgRecords(DPMarker *M);
+  void setTrailingDbgRecords(DbgMarker *M);
 
   /// Fetch the collection of DbgRecords that "trail" after the last instruction
   /// of this block, see \ref setTrailingDbgRecords. If there are none, returns
   /// nullptr.
-  DPMarker *getTrailingDbgRecords();
+  DbgMarker *getTrailingDbgRecords();
 
   /// Delete any trailing DbgRecords at the end of this block, see
   /// \ref setTrailingDbgRecords.
   void deleteTrailingDbgRecords();
 
   void dumpDbgValues() const;
 
-  /// Return the DPMarker for the position given by \p It, so that DbgRecords
+  /// Return the DbgMarker for the position given by \p It, so that DbgRecords
   /// can be inserted there. This will either be nullptr if not present, a
-  /// DPMarker, or TrailingDbgRecords if It is end().
-  DPMarker *getMarker(InstListType::iterator It);
+  /// DbgMarker, or TrailingDbgRecords if It is end().
+  DbgMarker *getMarker(InstListType::iterator It);
 
-  /// Return the DPMarker for the position that comes after \p I. \see
-  /// BasicBlock::getMarker, this can be nullptr, a DPMarker, or
+  /// Return the DbgMarker for the position that comes after \p I. \see
+  /// BasicBlock::getMarker, this can be nullptr, a DbgMarker, or
   /// TrailingDbgRecords if there is no next instruction.
-  DPMarker *getNextMarker(Instruction *I);
+  DbgMarker *getNextMarker(Instruction *I);
 
   /// Insert a DbgRecord into a block at the position given by \p I.
   void insertDbgRecordAfter(DbgRecord *DR, Instruction *I);

llvm/include/llvm/IR/DebugProgramInstruction.h

@@ -16,22 +16,22 @@
 //
 // and all information is stored in the Value / Metadata hierachy defined
 // elsewhere in LLVM. In the "DbgRecord" design, each instruction /may/ have a
-// connection with a DPMarker, which identifies a position immediately before
-// the instruction, and each DPMarker /may/ then have connections to DbgRecords
+// connection with a DbgMarker, which identifies a position immediately before
+// the instruction, and each DbgMarker /may/ then have connections to DbgRecords
 // which record the variable assignment information. To illustrate:
 //
 //    %foo = add i32 1, %0
-//       ; foo->DbgMarker == nullptr
+//       ; foo->DebugMarker == nullptr
 //       ;; There are no variable assignments / debug records "in front" of
-//       ;; the instruction for %foo, therefore it has no DbgMarker.
+//       ;; the instruction for %foo, therefore it has no DebugMarker.
 //    %bar = void call @ext(%foo)
-//       ; bar->DbgMarker = {
+//       ; bar->DebugMarker = {
 //       ;   StoredDbgRecords = {
 //       ;     DbgVariableRecord(metadata i32 %foo, ...)
 //       ;   }
 //       ; }
 //       ;; There is a debug-info record in front of the %bar instruction,
-//       ;; thus it points at a DPMarker object. That DPMarker contains a
+//       ;; thus it points at a DbgMarker object. That DbgMarker contains a
 //       ;; DbgVariableRecord in it's ilist, storing the equivalent information
 //       to the
 //       ;; dbg.value above: the Value, DILocalVariable, etc.
@@ -66,7 +66,7 @@ class DbgVariableIntrinsic;
 class DbgInfoIntrinsic;
 class DbgLabelInst;
 class DIAssignID;
-class DPMarker;
+class DbgMarker;
 class DbgVariableRecord;
 class raw_ostream;
 
@@ -120,7 +120,7 @@ template <typename T> class DbgRecordParamRef {
 /// Base class for non-instruction debug metadata records that have positions
 /// within IR. Features various methods copied across from the Instruction
 /// class to aid ease-of-use. DbgRecords should always be linked into a
-/// DPMarker's StoredDbgRecords list. The marker connects a DbgRecord back to
+/// DbgMarker's StoredDbgRecords list. The marker connects a DbgRecord back to
 /// it's position in the BasicBlock.
 ///
 /// We need a discriminator for dyn/isa casts. In order to avoid paying for a
@@ -134,7 +134,7 @@ template <typename T> class DbgRecordParamRef {
 class DbgRecord : public ilist_node<DbgRecord> {
 public:
   /// Marker that this DbgRecord is linked into.
-  DPMarker *Marker = nullptr;
+  DbgMarker *Marker = nullptr;
   /// Subclass discriminator.
   enum Kind : uint8_t { ValueKind, LabelKind };
 
@@ -166,10 +166,10 @@ class DbgRecord : public ilist_node<DbgRecord> {
 
   Kind getRecordKind() const { return RecordKind; }
 
-  void setMarker(DPMarker *M) { Marker = M; }
+  void setMarker(DbgMarker *M) { Marker = M; }
 
-  DPMarker *getMarker() { return Marker; }
-  const DPMarker *getMarker() const { return Marker; }
+  DbgMarker *getMarker() { return Marker; }
+  const DbgMarker *getMarker() const { return Marker; }
 
   BasicBlock *getBlock();
   const BasicBlock *getBlock() const;
@@ -539,7 +539,7 @@ filterDbgVars(iterator_range<simple_ilist<DbgRecord>::iterator> R) {
 }
 
 /// Per-instruction record of debug-info. If an Instruction is the position of
-/// some debugging information, it points at a DPMarker storing that info. Each
+/// some debugging information, it points at a DbgMarker storing that info. Each
 /// marker points back at the instruction that owns it. Various utilities are
 /// provided for manipulating the DbgRecords contained within this marker.
 ///
@@ -559,9 +559,9 @@ filterDbgVars(iterator_range<simple_ilist<DbgRecord>::iterator> R) {
 /// which we can improve in the future. Additionally, many improvements in the
 /// way that debug-info is stored can be achieved in this class, at a future
 /// date.
-class DPMarker {
+class DbgMarker {
 public:
-  DPMarker() {}
+  DbgMarker() {}
   /// Link back to the Instruction that owns this marker. Can be null during
   /// operations that move a marker from one instruction to another.
   Instruction *MarkedInstr = nullptr;
@@ -585,30 +585,31 @@ class DPMarker {
   void removeFromParent();
   void eraseFromParent();
 
-  /// Implement operator<< on DPMarker.
+  /// Implement operator<< on DbgMarker.
   void print(raw_ostream &O, bool IsForDebug = false) const;
   void print(raw_ostream &ROS, ModuleSlotTracker &MST, bool IsForDebug) const;
 
   /// Produce a range over all the DbgRecords in this Marker.
   iterator_range<simple_ilist<DbgRecord>::iterator> getDbgRecordRange();
   iterator_range<simple_ilist<DbgRecord>::const_iterator>
   getDbgRecordRange() const;
-  /// Transfer any DbgRecords from \p Src into this DPMarker. If \p InsertAtHead
-  /// is true, place them before existing DbgRecords, otherwise afterwards.
-  void absorbDebugValues(DPMarker &Src, bool InsertAtHead);
-  /// Transfer the DbgRecords in \p Range from \p Src into this DPMarker. If
+  /// Transfer any DbgRecords from \p Src into this DbgMarker. If \p
+  /// InsertAtHead is true, place them before existing DbgRecords, otherwise
+  /// afterwards.
+  void absorbDebugValues(DbgMarker &Src, bool InsertAtHead);
+  /// Transfer the DbgRecords in \p Range from \p Src into this DbgMarker. If
   /// \p InsertAtHead is true, place them before existing DbgRecords, otherwise
   // afterwards.
   void absorbDebugValues(iterator_range<DbgRecord::self_iterator> Range,
-                         DPMarker &Src, bool InsertAtHead);
-  /// Insert a DbgRecord into this DPMarker, at the end of the list. If
+                         DbgMarker &Src, bool InsertAtHead);
+  /// Insert a DbgRecord into this DbgMarker, at the end of the list. If
   /// \p InsertAtHead is true, at the start.
   void insertDbgRecord(DbgRecord *New, bool InsertAtHead);
   /// Insert a DbgRecord prior to a DbgRecord contained within this marker.
   void insertDbgRecord(DbgRecord *New, DbgRecord *InsertBefore);
   /// Insert a DbgRecord after a DbgRecord contained within this marker.
   void insertDbgRecordAfter(DbgRecord *New, DbgRecord *InsertAfter);
-  /// Clone all DPMarkers from \p From into this marker. There are numerous
+  /// Clone all DbgMarkers from \p From into this marker. There are numerous
   /// options to customise the source/destination, due to gnarliness, see class
   /// comment.
   /// \p FromHere If non-null, copy from FromHere to the end of From's
@@ -617,45 +618,45 @@ class DPMarker {
   /// StoredDbgRecords
   /// \returns Range over all the newly cloned DbgRecords
   iterator_range<simple_ilist<DbgRecord>::iterator>
-  cloneDebugInfoFrom(DPMarker *From,
+  cloneDebugInfoFrom(DbgMarker *From,
                      std::optional<simple_ilist<DbgRecord>::iterator> FromHere,
                      bool InsertAtHead = false);
-  /// Erase all DbgRecords in this DPMarker.
+  /// Erase all DbgRecords in this DbgMarker.
   void dropDbgRecords();
   /// Erase a single DbgRecord from this marker. In an ideal future, we would
   /// never erase an assignment in this way, but it's the equivalent to
   /// erasing a debug intrinsic from a block.
   void dropOneDbgRecord(DbgRecord *DR);
 
   /// We generally act like all llvm Instructions have a range of DbgRecords
-  /// attached to them, but in reality sometimes we don't allocate the DPMarker
+  /// attached to them, but in reality sometimes we don't allocate the DbgMarker
   /// to save time and memory, but still have to return ranges of DbgRecords.
   /// When we need to describe such an unallocated DbgRecord range, use this
   /// static markers range instead. This will bite us if someone tries to insert
   /// a DbgRecord in that range, but they should be using the Official (TM) API
   /// for that.
-  static DPMarker EmptyDPMarker;
+  static DbgMarker EmptyDbgMarker;
   static iterator_range<simple_ilist<DbgRecord>::iterator>
   getEmptyDbgRecordRange() {
-    return make_range(EmptyDPMarker.StoredDbgRecords.end(),
-                      EmptyDPMarker.StoredDbgRecords.end());
+    return make_range(EmptyDbgMarker.StoredDbgRecords.end(),
+                      EmptyDbgMarker.StoredDbgRecords.end());
   }
 };
 
-inline raw_ostream &operator<<(raw_ostream &OS, const DPMarker &Marker) {
+inline raw_ostream &operator<<(raw_ostream &OS, const DbgMarker &Marker) {
   Marker.print(OS);
   return OS;
 }
 
 /// Inline helper to return a range of DbgRecords attached to a marker. It needs
 /// to be inlined as it's frequently called, but also come after the declaration
-/// of DPMarker. Thus: it's pre-declared by users like Instruction, then an
+/// of DbgMarker. Thus: it's pre-declared by users like Instruction, then an
 /// inlineable body defined here.
 inline iterator_range<simple_ilist<DbgRecord>::iterator>
-getDbgRecordRange(DPMarker *DbgMarker) {
-  if (!DbgMarker)
-    return DPMarker::getEmptyDbgRecordRange();
-  return DbgMarker->getDbgRecordRange();
+getDbgRecordRange(DbgMarker *DebugMarker) {
+  if (!DebugMarker)
+    return DbgMarker::getEmptyDbgRecordRange();
+  return DebugMarker->getDbgRecordRange();
 }
 
 DEFINE_ISA_CONVERSION_FUNCTIONS(DbgRecord, LLVMDbgRecordRef)

llvm/include/llvm/IR/Instruction.h

@@ -29,19 +29,20 @@
 namespace llvm {
 
 class BasicBlock;
-class DPMarker;
+class DbgMarker;
 class FastMathFlags;
 class MDNode;
 class Module;
 struct AAMDNodes;
-class DPMarker;
+class DbgMarker;
 class DbgRecord;
 
 template <> struct ilist_alloc_traits<Instruction> {
   static inline void deleteNode(Instruction *V);
 };
 
-iterator_range<simple_ilist<DbgRecord>::iterator> getDbgRecordRange(DPMarker *);
+iterator_range<simple_ilist<DbgRecord>::iterator>
+getDbgRecordRange(DbgMarker *);
 
 class Instruction : public User,
                     public ilist_node_with_parent<Instruction, BasicBlock,
@@ -60,7 +61,7 @@ class Instruction : public User,
   /// Optional marker recording the position for debugging information that
   /// takes effect immediately before this instruction. Null unless there is
   /// debugging information present.
-  DPMarker *DbgMarker = nullptr;
+  DbgMarker *DebugMarker = nullptr;
 
   /// Clone any debug-info attached to \p From onto this instruction. Used to
   /// copy debugging information from one block to another, when copying entire
@@ -81,7 +82,7 @@ class Instruction : public User,
 
   /// Return a range over the DbgRecords attached to this instruction.
   iterator_range<simple_ilist<DbgRecord>::iterator> getDbgRecordRange() const {
-    return llvm::getDbgRecordRange(DbgMarker);
+    return llvm::getDbgRecordRange(DebugMarker);
   }
 
   /// Return an iterator to the position of the "Next" DbgRecord after this

llvm/lib/Bitcode/Writer/BitcodeWriter.cpp

@@ -3569,7 +3569,7 @@ void ModuleBitcodeWriter::writeFunction(
         // Write out non-instruction debug information attached to this
         // instruction. Write it after the instruction so that it's easy to
         // re-attach to the instruction reading the records in.
-        for (DbgRecord &DR : I.DbgMarker->getDbgRecordRange()) {
+        for (DbgRecord &DR : I.DebugMarker->getDbgRecordRange()) {
           if (DbgLabelRecord *DLR = dyn_cast<DbgLabelRecord>(&DR)) {
             Vals.push_back(VE.getMetadataID(&*DLR->getDebugLoc()));
             Vals.push_back(VE.getMetadataID(DLR->getLabel()));