diff --git a/llvm/lib/CodeGen/MachineOperand.cpp b/llvm/lib/CodeGen/MachineOperand.cpp
--- a/llvm/lib/CodeGen/MachineOperand.cpp
+++ b/llvm/lib/CodeGen/MachineOperand.cpp
@@ -670,7 +670,7 @@
       size_t e = CFI.getValues().size() - 1;
       for (size_t i = 0; i < e; ++i)
         OS << format("0x%02x", uint8_t(CFI.getValues()[i])) << ", ";
-      OS << format("0x%02x", uint8_t(CFI.getValues()[e])) << ", ";
+      OS << format("0x%02x", uint8_t(CFI.getValues()[e]));
     }
     break;
   }
diff --git a/llvm/test/CodeGen/MIR/AArch64/cfi.mir b/llvm/test/CodeGen/MIR/AArch64/cfi.mir
--- a/llvm/test/CodeGen/MIR/AArch64/cfi.mir
+++ b/llvm/test/CodeGen/MIR/AArch64/cfi.mir
@@ -42,7 +42,7 @@
     CFI_INSTRUCTION restore_state
     ; CHECK: CFI_INSTRUCTION restore_state
     CFI_INSTRUCTION escape 0x61, 0x62, 0x63
-    ; CHECK: CFI_INSTRUCTION escape 0x61, 0x62, 0x63
+    ; CHECK: CFI_INSTRUCTION escape 0x61, 0x62, 0x63{{$}}
     CFI_INSTRUCTION window_save
     ; CHECK: CFI_INSTRUCTION window_save
     CFI_INSTRUCTION negate_ra_sign_state
diff --git a/llvm/test/CodeGen/MIR/Generic/cfi-escape.mir b/llvm/test/CodeGen/MIR/Generic/cfi-escape.mir
new file mode 100644
--- /dev/null
+++ b/llvm/test/CodeGen/MIR/Generic/cfi-escape.mir
@@ -0,0 +1,11 @@
+# RUN: llc -run-pass none -o - %s | llc -x=mir -run-pass none -o - | FileCheck %s
+
+# Check that we don't print a trailing comma for CFI escape indices, and that
+# in general we can round trip them.
+
+name: func
+# CHECK-LABEL: name: func
+body: |
+  bb.0:
+    CFI_INSTRUCTION escape 0x61, 0x62, 0x63
+    ; CHECK: CFI_INSTRUCTION escape 0x61, 0x62, 0x63{{$}}