diff --git a/llvm/lib/Target/AMDGPU/DSInstructions.td b/llvm/lib/Target/AMDGPU/DSInstructions.td
index 3703133126b0f..7a22ae0c401e2 100644
--- a/llvm/lib/Target/AMDGPU/DSInstructions.td
+++ b/llvm/lib/Target/AMDGPU/DSInstructions.td
@@ -19,6 +19,7 @@ class DS_Pseudo <string opName, dag outs, dag ins, string asmOps, list<dag> patt
   // Most instruction load and store data, so set this as the default.
   let mayLoad = 1;
   let mayStore = 1;
+  let FixedSize = true;
 
   let hasSideEffects = 0;
   let SchedRW = [WriteLDS];