Make modules depend on the compiler's own module.map, as a proxy for the compiler itself.
The headers in the compiler's own resource include directory are
system headers, which means we don't stat() them eagerly when loading
a module. Use module.map as a proxy for these headers and the compiler
itself. Fixes <rdar://problem/13856838>.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186870 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Serialization/ASTWriter.h b/include/clang/Serialization/ASTWriter.h
index 2533596..e94b685 100644
--- a/include/clang/Serialization/ASTWriter.h
+++ b/include/clang/Serialization/ASTWriter.h
@@ -424,7 +424,8 @@
StringRef isysroot, const std::string &OutputFile);
void WriteInputFiles(SourceManager &SourceMgr,
HeaderSearchOptions &HSOpts,
- StringRef isysroot);
+ StringRef isysroot,
+ bool Modules);
void WriteSourceManagerBlock(SourceManager &SourceMgr,
const Preprocessor &PP,
StringRef isysroot);
diff --git a/lib/Serialization/ASTWriter.cpp b/lib/Serialization/ASTWriter.cpp
index 5f9da8a..08d7f96 100644
--- a/lib/Serialization/ASTWriter.cpp
+++ b/lib/Serialization/ASTWriter.cpp
@@ -1233,7 +1233,8 @@
WriteInputFiles(Context.SourceMgr,
PP.getHeaderSearchInfo().getHeaderSearchOpts(),
- isysroot);
+ isysroot,
+ PP.getLangOpts().Modules);
Stream.ExitBlock();
}
@@ -1248,7 +1249,8 @@
void ASTWriter::WriteInputFiles(SourceManager &SourceMgr,
HeaderSearchOptions &HSOpts,
- StringRef isysroot) {
+ StringRef isysroot,
+ bool Modules) {
using namespace llvm;
Stream.EnterSubblock(INPUT_FILES_BLOCK_ID, 4);
RecordData Record;
@@ -1302,6 +1304,19 @@
}
}
+ // Add the compiler's own module.map in the set of (non-system) input files.
+ // This is a simple heuristic for detecting whether the compiler's headers
+ // have changed, because we don't want to stat() all of them.
+ if (Modules && !Chain) {
+ SmallString<128> P = StringRef(HSOpts.ResourceDir);
+ llvm::sys::path::append(P, "include");
+ llvm::sys::path::append(P, "module.map");
+ if (const FileEntry *ModuleMapFile = FileMgr.getFile(P)) {
+ InputFileEntry Entry = { ModuleMapFile, false, false };
+ SortedFiles.push_front(Entry);
+ }
+ }
+
unsigned UserFilesNum = 0;
// Write out all of the input files.
std::vector<uint32_t> InputFileOffsets;