[ThinLTO] Add option to emit imports files for distributed backends
Summary:
Add support for emission of plaintext lists of the imported files for
each distributed backend compilation. Used for distributed build file
staging.
Invoked with new gold-plugin thinlto-emit-imports-files option, which is
only valid with thinlto-index-only (i.e. for distributed builds), or
from llvm-lto with new -thinlto-action=emitimports value.
Depends on D19556.
Reviewers: joker.eph
Subscribers: llvm-commits, joker.eph
Differential Revision: http://reviews.llvm.org/D19636
llvm-svn: 269067
diff --git a/llvm/lib/Transforms/IPO/FunctionImport.cpp b/llvm/lib/Transforms/IPO/FunctionImport.cpp
index 6c571f4..3ce3b7b 100644
--- a/llvm/lib/Transforms/IPO/FunctionImport.cpp
+++ b/llvm/lib/Transforms/IPO/FunctionImport.cpp
@@ -445,6 +445,21 @@
}
}
+/// Emit the files \p ModulePath will import from into \p OutputFilename.
+std::error_code llvm::EmitImportsFiles(
+ StringRef ModulePath, StringRef OutputFilename,
+ const StringMap<FunctionImporter::ImportMapTy> &ImportLists) {
+ auto ModuleImports = ImportLists.find(ModulePath);
+ std::error_code EC;
+ raw_fd_ostream ImportsOS(OutputFilename, EC, sys::fs::OpenFlags::F_None);
+ if (EC)
+ return EC;
+ if (ModuleImports != ImportLists.end())
+ for (auto &ILI : ModuleImports->second)
+ ImportsOS << ILI.first() << "\n";
+ return std::error_code();
+}
+
// Automatically import functions in Module \p DestModule based on the summaries
// index.
//