diff --git a/llvm/lib/Target/ARM/ARMInstrThumb2.td b/llvm/lib/Target/ARM/ARMInstrThumb2.td
--- a/llvm/lib/Target/ARM/ARMInstrThumb2.td
+++ b/llvm/lib/Target/ARM/ARMInstrThumb2.td
@@ -5476,9 +5476,14 @@
   let Predicates = [IsThumb2, HasV8_1MMainline, HasLOB];
 }
 
+// This is a pseudo op for a label used by a branch future instruction
 def t2BF_LabelPseudo
   : t2PseudoInst<(outs ), (ins pclabel:$cp), 0, NoItinerary, []> {
-  let isTerminator = 1;
+  // Turns into just a label, rather than any instructions.
+  let Size = 0;
+  // This defines a label, $cp, so we shouldn't duplicate this because we cannot
+  // define the label in two different places.
+  let isNotDuplicable = true;
   let Predicates = [IsThumb2, HasV8_1MMainline, HasLOB];
   let hasNoSchedulingInfo = 1;
 }