Add a pass to strip bitcode metadata.

This only works on instruction attachments for now.  Since it is a
ModulePass we can add something to strip NamedMetadata
based on a whitelist, if we want to retain some of that.

It does not touch debug metadata, and leaves -strip-debug to handle that.

BUG= https://code.google.com/p/nativeclient/issues/detail?id=3348

Review URL: https://codereview.chromium.org/12844027

1 files changed, 1 insertions, 0 deletions

diff --git a/tools/opt/opt.cpp b/tools/opt/opt.cpp
index c682768164..106da562c6 100644
--- a/tools/opt/opt.cpp
+++ b/tools/opt/opt.cpp
@@ -585,6 +585,7 @@ int main(int argc, char **argv) {
   initializeExpandVarArgsPass(Registry);
   initializeGlobalCleanupPass(Registry);
   initializeResolveAliasesPass(Registry);
+  initializeStripMetadataPass(Registry);
   // @LOCALMOD-END
 
   cl::ParseCommandLineOptions(argc, argv,