Index: lldb/test/Shell/Register/x86-fp-read.test
===================================================================
--- lldb/test/Shell/Register/x86-fp-read.test
+++ lldb/test/Shell/Register/x86-fp-read.test
@@ -1,5 +1,4 @@
 # XFAIL: system-windows
-# XFAIL: system-darwin
 # REQUIRES: native && (target-x86 || target-x86_64)
 # RUN: %clangxx_host -g %p/Inputs/x86-fp-read.cpp -o %t
 # RUN: %lldb -b -s %s %t | FileCheck %s
@@ -14,14 +13,14 @@
 # CHECK-DAG: ftag = 0x00fe
 # CHECK-DAG: fop = 0x0033
 
-# CHECK-DAG: st0 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x80 0x00 0x40}
-# CHECK-DAG: st1 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x3f 0x00 0x00}
-# CHECK-DAG: st2 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
-# CHECK-DAG: st3 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x80}
-# CHECK-DAG: st4 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x80 0xff 0x7f}
-# CHECK-DAG: st5 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x80 0xff 0xff}
-# CHECK-DAG: st6 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0xc0 0xff 0xff}
-# CHECK-DAG: st7 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
+# CHECK-DAG: st{{(mm)?}}0 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x80 0x00 0x40}
+# CHECK-DAG: st{{(mm)?}}1 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x3f 0x00 0x00}
+# CHECK-DAG: st{{(mm)?}}2 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
+# CHECK-DAG: st{{(mm)?}}3 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x80}
+# CHECK-DAG: st{{(mm)?}}4 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x80 0xff 0x7f}
+# CHECK-DAG: st{{(mm)?}}5 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x80 0xff 0xff}
+# CHECK-DAG: st{{(mm)?}}6 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0xc0 0xff 0xff}
+# CHECK-DAG: st{{(mm)?}}7 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
 
 # fdiv (%rbx) gets encoded into 2 bytes, int3 into 1 byte
 print (void*)($pc-3)