[Modules] Resolve top-headers of modules lazily.
This allows resolving top-header filenames of modules to FileEntries when
we need them, not eagerly.
Note that that this breaks ABI for libclang functions
clang_Module_getTopLevelHeader / clang_Module_getNumTopLevelHeaders
but this is fine because they are experimental and not widely used yet.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176975 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/Module.cpp b/lib/Basic/Module.cpp
index 65deac1..f074391 100644
--- a/lib/Basic/Module.cpp
+++ b/lib/Basic/Module.cpp
@@ -15,6 +15,7 @@
#include "clang/Basic/FileManager.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/TargetInfo.h"
+#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Support/ErrorHandling.h"
@@ -129,6 +130,19 @@
return Umbrella.dyn_cast<const DirectoryEntry *>();
}
+ArrayRef<const FileEntry *> Module::getTopHeaders(FileManager &FileMgr) {
+ if (!TopHeaderNames.empty()) {
+ for (std::vector<std::string>::iterator
+ I = TopHeaderNames.begin(), E = TopHeaderNames.end(); I != E; ++I) {
+ if (const FileEntry *FE = FileMgr.getFile(*I))
+ TopHeaders.insert(FE);
+ }
+ TopHeaderNames.clear();
+ }
+
+ return llvm::makeArrayRef(TopHeaders.begin(), TopHeaders.end());
+}
+
void Module::addRequirement(StringRef Feature, const LangOptions &LangOpts,
const TargetInfo &Target) {
Requires.push_back(Feature);