Replace DepLibs bitcode record with metadata

It keeps the same Module interface as the existing/old deplibs feature, but populates the library list from the metadata after reading the bitcode/LL into the Module.
Keeping the same module interface will allow us to keep the existing uses (e.g. in the gold plugin) as they are.
Internally it still uses the LibraryList variable, but uses it basically as a cache backed by the metadata.

BUG=

Review URL: https://codereview.chromium.org/11615013

1 files changed, 5 insertions, 1 deletions

diff --git a/lib/Transforms/Utils/CloneModule.cpp b/lib/Transforms/Utils/CloneModule.cpp
index 114babd101..29ab5a72c4 100644
--- a/lib/Transforms/Utils/CloneModule.cpp
+++ b/lib/Transforms/Utils/CloneModule.cpp
@@ -37,7 +37,11 @@ Module *llvm::CloneModule(const Module *M, ValueToValueMapTy &VMap) {
   New->setDataLayout(M->getDataLayout());
   New->setTargetTriple(M->getTargetTriple());
   New->setModuleInlineAsm(M->getModuleInlineAsm());
-   
+  // @LOCALMOD-BEGIN
+  // Copy all of the dependent libraries over.
+  for (Module::lib_iterator I = M->lib_begin(), E = M->lib_end(); I != E; ++I)
+    New->addLibrary(*I);
+  // @LOCALMOD-END
   // Loop over all of the global variables, making corresponding globals in the
   // new module.  Here we add them to the VMap and to the new Module.  We
   // don't worry about attributes or initializers, they will come later.