diff --git a/lib/Target/ARM/ARMInstrThumb2.td b/lib/Target/ARM/ARMInstrThumb2.td
index 1bdc0de..d2ee466 100644
--- a/lib/Target/ARM/ARMInstrThumb2.td
+++ b/lib/Target/ARM/ARMInstrThumb2.td
@@ -2897,9 +2897,7 @@
   let Inst{11-8} = Rt2;
 }
 
-// Clear-Exclusive is for disassembly only.
-def t2CLREX : T2XI<(outs), (ins), NoItinerary, "clrex",
-                   [/* For disassembly only; pattern left blank */]>,
+def t2CLREX : T2I<(outs), (ins), NoItinerary, "clrex", "", []>,
             Requires<[IsThumb2, HasV7]>  {
   let Inst{31-16} = 0xf3bf;
   let Inst{15-14} = 0b10;
diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index 6668fc9..b468d9f 100644
--- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -3022,8 +3022,8 @@
       Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
       Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
       Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
-      Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "clrex" ||
-      Mnemonic == "setend" ||
+      Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "setend" ||
+      (Mnemonic == "clrex" && !isThumb()) ||
       (Mnemonic == "nop" && isThumbOne()) ||
       ((Mnemonic == "pld" || Mnemonic == "pli" || Mnemonic == "pldw") &&
        !isThumb()) ||
diff --git a/test/MC/ARM/basic-thumb2-instructions.s b/test/MC/ARM/basic-thumb2-instructions.s
index 1d4ba2c..926af98 100644
--- a/test/MC/ARM/basic-thumb2-instructions.s
+++ b/test/MC/ARM/basic-thumb2-instructions.s
@@ -293,6 +293,18 @@
 
 
 @------------------------------------------------------------------------------
+@ CLREX
+@------------------------------------------------------------------------------
+        clrex
+        it ne
+        clrexne
+
+@ CHECK: clrex                           @ encoding: [0xbf,0xf3,0x2f,0x8f]
+@ CHECK: it	ne                       @ encoding: [0x18,0xbf]
+@ CHECK: clrexne                         @ encoding: [0xbf,0xf3,0x2f,0x8f]
+
+
+@------------------------------------------------------------------------------
 @ IT
 @------------------------------------------------------------------------------
 @ Test encodings of a few full IT blocks, not just the IT instruction