[NFC] Add const qualifier to isEmpty()

Reviewed By: aeubanks

Differential Revision: https://reviews.llvm.org/D91587

diff --git a/llvm/include/llvm/IR/PassManager.h b/llvm/include/llvm/IR/PassManager.h
index 54e859b..4e69f11 100644 (file)
--- a/llvm/include/llvm/IR/PassManager.h
+++ b/llvm/include/llvm/IR/PassManager.h
@@ -571,7 +571,7 @@ public:
   }
 
   /// Returns if the pass manager contains any passes.
-  bool isEmpty() { return Passes.empty(); }
+  bool isEmpty() const { return Passes.empty(); }
 
   static bool isRequired() { return true; }