diff --git a/llvm/lib/Target/Mips/MipsISelLowering.cpp b/llvm/lib/Target/Mips/MipsISelLowering.cpp
--- a/llvm/lib/Target/Mips/MipsISelLowering.cpp
+++ b/llvm/lib/Target/Mips/MipsISelLowering.cpp
@@ -3948,7 +3948,7 @@
     break;
   case 'f': // FPU or MSA register
     if (Subtarget.hasMSA() && type->isVectorTy() &&
-        cast<VectorType>(type)->getBitWidth() == 128)
+        type->getPrimitiveSizeInBits().getFixedSize() == 128)
       weight = CW_Register;
     else if (type->isFloatTy())
       weight = CW_Register;