[Clang FE, SystemZ] Don't add "true" value for the "mnop-mcount" attribute.

Let the "mnop-mcount" function attribute simply be present or non-present.
Update SystemZ backend as well to use hasFnAttribute() instead.

Review: Ulrich Weigand
https://reviews.llvm.org/D71669

1 files changed, 1 insertions, 1 deletions

diff --git a/clang/lib/CodeGen/CodeGenFunction.cpp b/clang/lib/CodeGen/CodeGenFunction.cpp
index 0db17431814..89ce31e9b45 100644
--- a/clang/lib/CodeGen/CodeGenFunction.cpp
+++ b/clang/lib/CodeGen/CodeGenFunction.cpp
@@ -966,7 +966,7 @@ void CodeGenFunction::StartFunction(GlobalDecl GD, QualType RetTy,
         if (!CGM.getCodeGenOpts().CallFEntry)
           CGM.getDiags().Report(diag::err_opt_not_valid_without_opt)
             << "-mnop-mcount" << "-mfentry";
-        Fn->addFnAttr("mnop-mcount", "true");
+        Fn->addFnAttr("mnop-mcount");
       }
     }
   }