diff --git a/llvm/lib/Target/AMDGPU/SIPostRABundler.cpp b/llvm/lib/Target/AMDGPU/SIPostRABundler.cpp
--- a/llvm/lib/Target/AMDGPU/SIPostRABundler.cpp
+++ b/llvm/lib/Target/AMDGPU/SIPostRABundler.cpp
@@ -76,7 +76,7 @@
     if (!Op.isReg())
       continue;
     Register Reg = Op.getReg();
-    for (const Register Def : Defs)
+    for (Register Def : Defs)
       if (TRI->regsOverlap(Reg, Def))
         return true;
   }