IR: Replace the "Linker Options" module flag with "llvm.linker.options" named metadata.

The new metadata is easier to manipulate than module flags.

Differential Revision: https://reviews.llvm.org/D31349

llvm-svn: 305227

1 files changed, 8 insertions, 0 deletions

diff --git a/llvm/lib/IR/Verifier.cpp b/llvm/lib/IR/Verifier.cpp
index 5c1b3412840..cf54cc3d6ae 100644
--- a/llvm/lib/IR/Verifier.cpp
+++ b/llvm/lib/IR/Verifier.cpp
@@ -1330,6 +1330,14 @@ Verifier::visitModuleFlag(const MDNode *Op,
       = mdconst::dyn_extract_or_null<ConstantInt>(Op->getOperand(2));
     Assert(Value, "wchar_size metadata requires constant integer argument");
   }
+
+  if (ID->getString() == "Linker Options") {
+    // If the llvm.linker.options named metadata exists, we assume that the
+    // bitcode reader has upgraded the module flag. Otherwise the flag might
+    // have been created by a client directly.
+    Assert(M.getNamedMetadata("llvm.linker.options"),
+           "'Linker Options' named metadata no longer supported");
+  }
 }
 
 /// Return true if this attribute kind only applies to functions.