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+# RUN: llvm-mc -triple=aarch64 -disassemble < %s 2>&1 | FileCheck %s
+
+# None of these instructions should be classified as unpredictable:
+
+# CHECK-NOT: potentially undefined instruction encoding
+
+# Stores from duplicated registers should be fine.
+0xe3 0x0f 0x80 0xa8
+# CHECK: stp x3, x3, [sp], #0
+
+# d5 != x5 so "ldp d5, d6, [x5], #24" is fine.
+0xa5 0x98 0xc1 0x6c
+# CHECK: ldp d5, d6, [x5], #24
+
+# xzr != sp so "stp xzr, xzr, [sp], #8" is fine.
+0xff 0xff 0x80 0xa8
+# CHECK: stp xzr, xzr, [sp], #8