Remove the capture, serialization, and deserialization of comment
ranges as part of the ASTContext. This code is not and was never used,
but contributes ~250k to the size of the Cocoa.h precompiled
header.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@99007 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index 2cf8ce7..7f5c9b1 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -43,8 +43,7 @@
GlobalNestedNameSpecifier(0), CFConstantStringTypeDecl(0),
ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0),
sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0),
- SourceMgr(SM), LangOpts(LOpts),
- LoadedExternalComments(false), FreeMemory(FreeMem), Target(t),
+ SourceMgr(SM), LangOpts(LOpts), FreeMemory(FreeMem), Target(t),
Idents(idents), Selectors(sels),
BuiltinInfo(builtins), ExternalSource(0), PrintingPolicy(LOpts) {
ObjCIdRedefinitionType = QualType();
@@ -413,201 +412,6 @@
};
}
-/// \brief Determine whether the given comment is a Doxygen-style comment.
-///
-/// \param Start the start of the comment text.
-///
-/// \param End the end of the comment text.
-///
-/// \param Member whether we want to check whether this is a member comment
-/// (which requires a < after the Doxygen-comment delimiter). Otherwise,
-/// we only return true when we find a non-member comment.
-static bool
-isDoxygenComment(SourceManager &SourceMgr, SourceRange Comment,
- bool Member = false) {
- bool Invalid = false;
- const char *BufferStart
- = SourceMgr.getBufferData(SourceMgr.getFileID(Comment.getBegin()),
- &Invalid).data();
- if (Invalid)
- return false;
-
- const char *Start = BufferStart + SourceMgr.getFileOffset(Comment.getBegin());
- const char* End = BufferStart + SourceMgr.getFileOffset(Comment.getEnd());
-
- if (End - Start < 4)
- return false;
-
- assert(Start[0] == '/' && "Not a comment?");
- if (Start[1] == '*' && !(Start[2] == '!' || Start[2] == '*'))
- return false;
- if (Start[1] == '/' && !(Start[2] == '!' || Start[2] == '/'))
- return false;
-
- return (Start[3] == '<') == Member;
-}
-
-/// \brief Retrieve the comment associated with the given declaration, if
-/// it has one.
-const char *ASTContext::getCommentForDecl(const Decl *D) {
- if (!D)
- return 0;
-
- // Check whether we have cached a comment string for this declaration
- // already.
- llvm::DenseMap<const Decl *, std::string>::iterator Pos
- = DeclComments.find(D);
- if (Pos != DeclComments.end())
- return Pos->second.c_str();
-
- // If we have an external AST source and have not yet loaded comments from
- // that source, do so now.
- if (ExternalSource && !LoadedExternalComments) {
- std::vector<SourceRange> LoadedComments;
- ExternalSource->ReadComments(LoadedComments);
-
- if (!LoadedComments.empty())
- Comments.insert(Comments.begin(), LoadedComments.begin(),
- LoadedComments.end());
-
- LoadedExternalComments = true;
- }
-
- // If there are no comments anywhere, we won't find anything.
- if (Comments.empty())
- return 0;
-
- // If the declaration doesn't map directly to a location in a file, we
- // can't find the comment.
- SourceLocation DeclStartLoc = D->getLocStart();
- if (DeclStartLoc.isInvalid() || !DeclStartLoc.isFileID())
- return 0;
-
- // Find the comment that occurs just before this declaration.
- std::vector<SourceRange>::iterator LastComment
- = std::lower_bound(Comments.begin(), Comments.end(),
- SourceRange(DeclStartLoc),
- BeforeInTranslationUnit(&SourceMgr));
-
- // Decompose the location for the start of the declaration and find the
- // beginning of the file buffer.
- std::pair<FileID, unsigned> DeclStartDecomp
- = SourceMgr.getDecomposedLoc(DeclStartLoc);
- bool Invalid = false;
- const char *FileBufferStart
- = SourceMgr.getBufferData(DeclStartDecomp.first, &Invalid).data();
- if (Invalid)
- return 0;
-
- // First check whether we have a comment for a member.
- if (LastComment != Comments.end() &&
- !isa<TagDecl>(D) && !isa<NamespaceDecl>(D) &&
- isDoxygenComment(SourceMgr, *LastComment, true)) {
- std::pair<FileID, unsigned> LastCommentEndDecomp
- = SourceMgr.getDecomposedLoc(LastComment->getEnd());
- if (DeclStartDecomp.first == LastCommentEndDecomp.first &&
- SourceMgr.getLineNumber(DeclStartDecomp.first, DeclStartDecomp.second)
- == SourceMgr.getLineNumber(LastCommentEndDecomp.first,
- LastCommentEndDecomp.second)) {
- // The Doxygen member comment comes after the declaration starts and
- // is on the same line and in the same file as the declaration. This
- // is the comment we want.
- std::string &Result = DeclComments[D];
- Result.append(FileBufferStart +
- SourceMgr.getFileOffset(LastComment->getBegin()),
- FileBufferStart + LastCommentEndDecomp.second + 1);
- return Result.c_str();
- }
- }
-
- if (LastComment == Comments.begin())
- return 0;
- --LastComment;
-
- // Decompose the end of the comment.
- std::pair<FileID, unsigned> LastCommentEndDecomp
- = SourceMgr.getDecomposedLoc(LastComment->getEnd());
-
- // If the comment and the declaration aren't in the same file, then they
- // aren't related.
- if (DeclStartDecomp.first != LastCommentEndDecomp.first)
- return 0;
-
- // Check that we actually have a Doxygen comment.
- if (!isDoxygenComment(SourceMgr, *LastComment))
- return 0;
-
- // Compute the starting line for the declaration and for the end of the
- // comment (this is expensive).
- unsigned DeclStartLine
- = SourceMgr.getLineNumber(DeclStartDecomp.first, DeclStartDecomp.second);
- unsigned CommentEndLine
- = SourceMgr.getLineNumber(LastCommentEndDecomp.first,
- LastCommentEndDecomp.second);
-
- // If the comment does not end on the line prior to the declaration, then
- // the comment is not associated with the declaration at all.
- if (CommentEndLine + 1 != DeclStartLine)
- return 0;
-
- // We have a comment, but there may be more comments on the previous lines.
- // Keep looking so long as the comments are still Doxygen comments and are
- // still adjacent.
- unsigned ExpectedLine
- = SourceMgr.getSpellingLineNumber(LastComment->getBegin()) - 1;
- std::vector<SourceRange>::iterator FirstComment = LastComment;
- while (FirstComment != Comments.begin()) {
- // Look at the previous comment
- --FirstComment;
- std::pair<FileID, unsigned> Decomp
- = SourceMgr.getDecomposedLoc(FirstComment->getEnd());
-
- // If this previous comment is in a different file, we're done.
- if (Decomp.first != DeclStartDecomp.first) {
- ++FirstComment;
- break;
- }
-
- // If this comment is not a Doxygen comment, we're done.
- if (!isDoxygenComment(SourceMgr, *FirstComment)) {
- ++FirstComment;
- break;
- }
-
- // If the line number is not what we expected, we're done.
- unsigned Line = SourceMgr.getLineNumber(Decomp.first, Decomp.second);
- if (Line != ExpectedLine) {
- ++FirstComment;
- break;
- }
-
- // Set the next expected line number.
- ExpectedLine
- = SourceMgr.getSpellingLineNumber(FirstComment->getBegin()) - 1;
- }
-
- // The iterator range [FirstComment, LastComment] contains all of the
- // BCPL comments that, together, are associated with this declaration.
- // Form a single comment block string for this declaration that concatenates
- // all of these comments.
- std::string &Result = DeclComments[D];
- while (FirstComment != LastComment) {
- std::pair<FileID, unsigned> DecompStart
- = SourceMgr.getDecomposedLoc(FirstComment->getBegin());
- std::pair<FileID, unsigned> DecompEnd
- = SourceMgr.getDecomposedLoc(FirstComment->getEnd());
- Result.append(FileBufferStart + DecompStart.second,
- FileBufferStart + DecompEnd.second + 1);
- ++FirstComment;
- }
-
- // Append the last comment line.
- Result.append(FileBufferStart +
- SourceMgr.getFileOffset(LastComment->getBegin()),
- FileBufferStart + LastCommentEndDecomp.second + 1);
- return Result.c_str();
-}
-
//===----------------------------------------------------------------------===//
// Type Sizing and Analysis
//===----------------------------------------------------------------------===//