COFF: Read linker directives from bitcode files.
Differential Revision: http://reviews.llvm.org/D10285
llvm-svn: 239212
diff --git a/lld/COFF/InputFiles.cpp b/lld/COFF/InputFiles.cpp
index ec8e9f5..62bb144 100644
--- a/lld/COFF/InputFiles.cpp
+++ b/lld/COFF/InputFiles.cpp
@@ -263,6 +263,23 @@
SymbolBodies.push_back(new (Alloc) DefinedBitcode(SymName));
}
}
+
+ // Extract any linker directives from the bitcode file, which are represented
+ // as module flags with the key "Linker Options".
+ llvm::SmallVector<llvm::Module::ModuleFlagEntry, 8> Flags;
+ M->getModule().getModuleFlagsMetadata(Flags);
+ for (auto &&Flag : Flags) {
+ if (Flag.Key->getString() != "Linker Options")
+ continue;
+
+ for (llvm::Metadata *Op : cast<llvm::MDNode>(Flag.Val)->operands()) {
+ for (llvm::Metadata *InnerOp : cast<llvm::MDNode>(Op)->operands()) {
+ Directives += " ";
+ Directives += cast<llvm::MDString>(InnerOp)->getString();
+ }
+ }
+ }
+
return std::error_code();
}