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diff --git a/test/MC/Sparc/sparc-atomic-instructions.s b/test/MC/Sparc/sparc-atomic-instructions.s
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+! RUN: llvm-mc %s -arch=sparcv9 -show-encoding | FileCheck %s
+
+ ! CHECK: membar 15 ! encoding: [0x81,0x43,0xe0,0x0f]
+ membar 15
+
+ ! CHECK: stbar ! encoding: [0x81,0x43,0xc0,0x00]
+ stbar
+
+ ! CHECK: swap [%i0+%l6], %o2 ! encoding: [0xd4,0x7e,0x00,0x16]
+ swap [%i0+%l6], %o2
+
+ ! CHECK: swap [%i0+32], %o2 ! encoding: [0xd4,0x7e,0x20,0x20]
+ swap [%i0+32], %o2
+
+ ! CHECK: cas [%i0], %l6, %o2 ! encoding: [0xd5,0xe6,0x10,0x16]
+ cas [%i0], %l6, %o2
+
+ ! CHECK: casx [%i0], %l6, %o2 ! encoding: [0xd5,0xf6,0x10,0x16]
+ casx [%i0], %l6, %o2