From 2fa656cdfd836d5d3959466f05e44ae51bcded4e Mon Sep 17 00:00:00 2001
From: Vedant Kumar <vsk@apple.com>
Date: Fri, 17 Apr 2020 17:53:14 -0700
Subject: [PATCH] [Debugify] Do not require named metadata to be present when
 stripping

This allows -mir-strip-debug to be run without -debugify having run
before.
---
 llvm/lib/Transforms/Utils/Debugify.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Transforms/Utils/Debugify.cpp b/llvm/lib/Transforms/Utils/Debugify.cpp
index f2739a8257a2..19c73f3840fc 100644
--- a/llvm/lib/Transforms/Utils/Debugify.cpp
+++ b/llvm/lib/Transforms/Utils/Debugify.cpp
@@ -224,7 +224,8 @@ bool llvm::stripDebugifyMetadata(Module &M) {
   // Strip out the module-level Debug Info Version metadata.
   // FIXME: There must be an easier way to remove an operand from a NamedMDNode.
   NamedMDNode *NMD = M.getModuleFlagsMetadata();
-  assert(NMD && "debugify metadata present without Debug Info Version set?");
+  if (!NMD)
+    return Changed;
   SmallVector<MDNode *, 4> Flags;
   for (MDNode *Flag : NMD->operands())
     Flags.push_back(Flag);