[clang] b698ad0 - [clang][NFC] Rearrange Comment Token and Lexer fields to reduce padding

[Nathan James via cfe-commits]

Author: Nathan James
Date: 2020-10-27T00:03:43Z
New Revision: b698ad00cbc76f34f48bb639ffb1cfee47a9737e

URL: https://github.com/llvm/llvm-project/commit/b698ad00cbc76f34f48bb639ffb1cfee47a9737e
DIFF: https://github.com/llvm/llvm-project/commit/b698ad00cbc76f34f48bb639ffb1cfee47a9737e.diff

LOG: [clang][NFC] Rearrange Comment Token and Lexer fields to reduce padding

Rearrange the fields to reduce the size of the classes

Reviewed By: gribozavr2

Differential Revision: https://reviews.llvm.org/D90127

Added: 
    

Modified: 
    clang/include/clang/AST/CommentLexer.h
    clang/lib/AST/CommentLexer.cpp

Removed: 
    


################################################################################
diff  --git a/clang/include/clang/AST/CommentLexer.h b/clang/include/clang/AST/CommentLexer.h
index 138fdaca0ff6..94f778501e75 100644
--- a/clang/include/clang/AST/CommentLexer.h
+++ b/clang/include/clang/AST/CommentLexer.h
@@ -62,13 +62,6 @@ class Token {
   /// The actual kind of the token.
   tok::TokenKind Kind;
 
-  /// Length of the token spelling in comment.  Can be 0 for synthenized
-  /// tokens.
-  unsigned Length;
-
-  /// Contains text value associated with a token.
-  const char *TextPtr;
-
   /// Integer value associated with a token.
   ///
   /// If the token is a known command, contains command ID and TextPtr is
@@ -76,6 +69,13 @@ class Token {
   /// contains the length of the string that starts at TextPtr.
   unsigned IntVal;
 
+  /// Length of the token spelling in comment.  Can be 0 for synthenized
+  /// tokens.
+  unsigned Length;
+
+  /// Contains text value associated with a token.
+  const char *TextPtr;
+
 public:
   SourceLocation getLocation() const LLVM_READONLY { return Loc; }
   void setLocation(SourceLocation SL) { Loc = SL; }
@@ -232,7 +232,6 @@ class Lexer {
 
   const char *const BufferStart;
   const char *const BufferEnd;
-  SourceLocation FileLoc;
 
   const char *BufferPtr;
 
@@ -240,7 +239,14 @@ class Lexer {
   /// to newline or BufferEnd, for C comments points to star in '*/'.
   const char *CommentEnd;
 
-  enum LexerCommentState {
+  SourceLocation FileLoc;
+
+  /// If true, the commands, html tags, etc will be parsed and reported as
+  /// separate tokens inside the comment body. If false, the comment text will
+  /// be parsed into text and newline tokens.
+  bool ParseCommands;
+
+  enum LexerCommentState : uint8_t {
     LCS_BeforeComment,
     LCS_InsideBCPLComment,
     LCS_InsideCComment,
@@ -250,7 +256,7 @@ class Lexer {
   /// Low-level lexer state, track if we are inside or outside of comment.
   LexerCommentState CommentState;
 
-  enum LexerState {
+  enum LexerState : uint8_t {
     /// Lexing normal comment text
     LS_Normal,
 
@@ -280,11 +286,6 @@ class Lexer {
   /// command, including command marker.
   SmallString<16> VerbatimBlockEndCommandName;
 
-  /// If true, the commands, html tags, etc will be parsed and reported as
-  /// separate tokens inside the comment body. If false, the comment text will
-  /// be parsed into text and newline tokens.
-  bool ParseCommands;
-
   /// Given a character reference name (e.g., "lt"), return the character that
   /// it stands for (e.g., "<").
   StringRef resolveHTMLNamedCharacterReference(StringRef Name) const;

diff  --git a/clang/lib/AST/CommentLexer.cpp b/clang/lib/AST/CommentLexer.cpp
index c1ea3eab075e..4bebd41e15ee 100644
--- a/clang/lib/AST/CommentLexer.cpp
+++ b/clang/lib/AST/CommentLexer.cpp
@@ -740,12 +740,11 @@ void Lexer::lexHTMLEndTag(Token &T) {
 
 Lexer::Lexer(llvm::BumpPtrAllocator &Allocator, DiagnosticsEngine &Diags,
              const CommandTraits &Traits, SourceLocation FileLoc,
-             const char *BufferStart, const char *BufferEnd,
-             bool ParseCommands)
+             const char *BufferStart, const char *BufferEnd, bool ParseCommands)
     : Allocator(Allocator), Diags(Diags), Traits(Traits),
-      BufferStart(BufferStart), BufferEnd(BufferEnd), FileLoc(FileLoc),
-      BufferPtr(BufferStart), CommentState(LCS_BeforeComment), State(LS_Normal),
-      ParseCommands(ParseCommands) {}
+      BufferStart(BufferStart), BufferEnd(BufferEnd), BufferPtr(BufferStart),
+      FileLoc(FileLoc), ParseCommands(ParseCommands),
+      CommentState(LCS_BeforeComment), State(LS_Normal) {}
 
 void Lexer::lex(Token &T) {
 again: