diff --git a/llvm/utils/UpdateTestChecks/common.py b/llvm/utils/UpdateTestChecks/common.py
--- a/llvm/utils/UpdateTestChecks/common.py
+++ b/llvm/utils/UpdateTestChecks/common.py
@@ -270,10 +270,12 @@
       output_lines.append(comment_marker)
       break
 
-def add_ir_checks(output_lines, comment_marker, prefix_list, func_dict, func_name):
+def add_ir_checks(output_lines, comment_marker, prefix_list, func_dict,
+                  func_name, preserve_names):
   # Label format is based on IR string.
   check_label_format = '{} %s-LABEL: @%s('.format(comment_marker)
-  add_checks(output_lines, comment_marker, prefix_list, func_dict, func_name, check_label_format, False, False)
+  add_checks(output_lines, comment_marker, prefix_list, func_dict, func_name,
+             check_label_format, False, preserve_names)
 
 def add_analyze_checks(output_lines, comment_marker, prefix_list, func_dict, func_name):
   check_label_format = '{} %s-LABEL: \'%s\''.format(comment_marker)
diff --git a/llvm/utils/update_test_checks.py b/llvm/utils/update_test_checks.py
--- a/llvm/utils/update_test_checks.py
+++ b/llvm/utils/update_test_checks.py
@@ -64,6 +64,8 @@
       '--function', help='The function in the test file to update')
   parser.add_argument('-u', '--update-only', action='store_true',
                       help='Only update test if it was already autogened')
+  parser.add_argument('-p', '--preserve-names', action='store_true',
+                      help='Do not scrub IR names')
   parser.add_argument('tests', nargs='+')
   args = parser.parse_args()
 
@@ -174,7 +176,8 @@
             continue
 
         # Print out the various check lines here.
-        common.add_ir_checks(output_lines, ';', prefix_list, func_dict, func_name)
+        common.add_ir_checks(output_lines, ';', prefix_list, func_dict,
+                             func_name, args.preserve_names)
         is_in_function_start = False
 
       if is_in_function: