diff options
author | Douglas Gregor <dgregor@apple.com> | 2011-12-31 04:05:44 +0000 |
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committer | Douglas Gregor <dgregor@apple.com> | 2011-12-31 04:05:44 +0000 |
commit | 51f564f80d9f71e175635b452ffeeeff899e9bf1 (patch) | |
tree | ada57bc51cc68158361f5d1a49d8de00b6a1e564 /lib/Serialization/ASTWriter.cpp | |
parent | 868f65c6bf904591f62a0d69866825d2d3dfd16f (diff) |
Implement support for module requirements, which indicate the language
features needed for a particular module to be available. This allows
mixed-language modules, where certain headers only work under some
language variants (e.g., in C++, std.tuple might only be available in
C++11 mode).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147387 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Serialization/ASTWriter.cpp')
-rw-r--r-- | lib/Serialization/ASTWriter.cpp | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/Serialization/ASTWriter.cpp b/lib/Serialization/ASTWriter.cpp index 1302d538f5..cfc83f7bc0 100644 --- a/lib/Serialization/ASTWriter.cpp +++ b/lib/Serialization/ASTWriter.cpp @@ -1916,6 +1916,11 @@ void ASTWriter::WriteSubmodules(Module *WritingModule) { Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name unsigned UmbrellaDirAbbrev = Stream.EmitAbbrev(Abbrev); + Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_REQUIRES)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Feature + unsigned RequiresAbbrev = Stream.EmitAbbrev(Abbrev); + // Write the submodule metadata block. RecordData Record; Record.push_back(getNumberOfModules(WritingModule)); @@ -1947,6 +1952,15 @@ void ASTWriter::WriteSubmodules(Module *WritingModule) { Record.push_back(Mod->InferExportWildcard); Stream.EmitRecordWithBlob(DefinitionAbbrev, Record, Mod->Name); + // Emit the requirements. + for (unsigned I = 0, N = Mod->Requires.size(); I != N; ++I) { + Record.clear(); + Record.push_back(SUBMODULE_REQUIRES); + Stream.EmitRecordWithBlob(RequiresAbbrev, Record, + Mod->Requires[I].data(), + Mod->Requires[I].size()); + } + // Emit the umbrella header, if there is one. if (const FileEntry *UmbrellaHeader = Mod->getUmbrellaHeader()) { Record.clear(); |