Force opt to use new pass manager in pr52289 test after c34d157

Author: vmaksimo

llvm/test/Transforms/PhaseOrdering/X86/pr52289.ll

@@ -1,5 +1,8 @@
+; TODO: remove -enable-new-pm from RUN-line once we move to new pass manager
+; by default. This test was designed to test NewPM only.
+
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt -O3 -S < %s | FileCheck %s
+; RUN: opt -enable-new-pm -O3 -S < %s | FileCheck %s
 
 target datalayout = "n8:16:32:64"