[Debugify] Do not report line 0 locations as errors

The checking logic should not treat artificial locations as being
somehow problematic. Producing these locations can be the desired
behavior of some passes.

See llvm.org/PR37961.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@335897 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 5 deletions

diff --git a/tools/opt/Debugify.cpp b/tools/opt/Debugify.cpp
index e8437016d94..05ade96a80d 100644
--- a/tools/opt/Debugify.cpp
+++ b/tools/opt/Debugify.cpp
@@ -237,11 +237,13 @@ bool checkDebugifyMetadata(Module &M,
         continue;
       }
 
-      dbg() << "ERROR: Instruction with empty DebugLoc in function ";
-      dbg() << F.getName() << " --";
-      I.print(dbg());
-      dbg() << "\n";
-      HasErrors = true;
+      if (!DL) {
+        dbg() << "ERROR: Instruction with empty DebugLoc in function ";
+        dbg() << F.getName() << " --";
+        I.print(dbg());
+        dbg() << "\n";
+        HasErrors = true;
+      }
     }
 
     // Find missing variables and mis-sized debug values.