diff --git a/lib/Target/ARM/ARMInstrThumb2.td b/lib/Target/ARM/ARMInstrThumb2.td
index 8a1bcc2d64a..7fcb4b07e56 100644
--- a/lib/Target/ARM/ARMInstrThumb2.td
+++ b/lib/Target/ARM/ARMInstrThumb2.td
@@ -3588,3 +3588,7 @@ def : t2InstAlias<"teq${p} $Rn, $Rm",
 def : t2InstAlias<"tst${p} $Rn, $Rm",
                   (t2TSTrr GPRnopc:$Rn, rGPR:$Rm, pred:$p)>;
 
+// Memory barriers
+def : InstAlias<"dmb", (t2DMB 0xf)>, Requires<[IsThumb2, HasDB]>;
+def : InstAlias<"dsb", (t2DSB 0xf)>, Requires<[IsThumb2, HasDB]>;
+//def : InstAlias<"isb", (t2ISB 0xf)>, Requires<[IsThumb2, HasDB]>;
diff --git a/test/MC/ARM/basic-thumb2-instructions.s b/test/MC/ARM/basic-thumb2-instructions.s
index 3039f2442f2..13cf725edc8 100644
--- a/test/MC/ARM/basic-thumb2-instructions.s
+++ b/test/MC/ARM/basic-thumb2-instructions.s
@@ -368,6 +368,38 @@ _func:
 @ CHECK: dbg	#15                     @ encoding: [0xaf,0xf3,0xff,0x80]
 
 
+@------------------------------------------------------------------------------
+@ DMB
+@------------------------------------------------------------------------------
+        dmb sy
+        dmb st
+        dmb sh
+        dmb ish
+        dmb shst
+        dmb ishst
+        dmb un
+        dmb nsh
+        dmb unst
+        dmb nshst
+        dmb osh
+        dmb oshst
+        dmb
+
+@ CHECK: dmb	sy                      @ encoding: [0xbf,0xf3,0x5f,0x8f]
+@ CHECK: dmb	st                      @ encoding: [0xbf,0xf3,0x5e,0x8f]
+@ CHECK: dmb	ish                     @ encoding: [0xbf,0xf3,0x5b,0x8f]
+@ CHECK: dmb	ish                     @ encoding: [0xbf,0xf3,0x5b,0x8f]
+@ CHECK: dmb	ishst                   @ encoding: [0xbf,0xf3,0x5a,0x8f]
+@ CHECK: dmb	ishst                   @ encoding: [0xbf,0xf3,0x5a,0x8f]
+@ CHECK: dmb	nsh                     @ encoding: [0xbf,0xf3,0x57,0x8f]
+@ CHECK: dmb	nsh                     @ encoding: [0xbf,0xf3,0x57,0x8f]
+@ CHECK: dmb	nshst                   @ encoding: [0xbf,0xf3,0x56,0x8f]
+@ CHECK: dmb	nshst                   @ encoding: [0xbf,0xf3,0x56,0x8f]
+@ CHECK: dmb	osh                     @ encoding: [0xbf,0xf3,0x53,0x8f]
+@ CHECK: dmb	oshst                   @ encoding: [0xbf,0xf3,0x52,0x8f]
+@ CHECK: dmb	sy                      @ encoding: [0xbf,0xf3,0x5f,0x8f]
+
+
 @------------------------------------------------------------------------------
 @ IT
 @------------------------------------------------------------------------------