Encode the Clang branch and Subversion revision into a PCH file, and
assume that PCH files from different Clang revisions are not
compatible. Addresses <rdar://problem/7266572>.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@83323 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/PCHWriter.cpp b/lib/Frontend/PCHWriter.cpp
index 08a1661..64a678e 100644
--- a/lib/Frontend/PCHWriter.cpp
+++ b/lib/Frontend/PCHWriter.cpp
@@ -394,7 +394,8 @@
RECORD(STAT_CACHE);
RECORD(EXT_VECTOR_DECLS);
RECORD(COMMENT_RANGES);
-
+ RECORD(SVN_BRANCH_REVISION);
+
// SourceManager Block.
BLOCK(SOURCE_MANAGER_BLOCK);
RECORD(SM_SLOC_FILE_ENTRY);
@@ -564,6 +565,17 @@
Record.push_back(pch::ORIGINAL_FILE_NAME);
Stream.EmitRecordWithBlob(FileAbbrevCode, Record, MainFileNameStr);
}
+
+ // Subversion branch/version information.
+ BitCodeAbbrev *SvnAbbrev = new BitCodeAbbrev();
+ SvnAbbrev->Add(BitCodeAbbrevOp(pch::SVN_BRANCH_REVISION));
+ SvnAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // SVN revision
+ SvnAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // SVN branch/tag
+ unsigned SvnAbbrevCode = Stream.EmitAbbrev(SvnAbbrev);
+ Record.clear();
+ Record.push_back(pch::SVN_BRANCH_REVISION);
+ Record.push_back(getClangSubversionRevision());
+ Stream.EmitRecordWithBlob(SvnAbbrevCode, Record, getClangSubversionPath());
}
/// \brief Write the LangOptions structure.