1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/include/llvm/Target/GenericOpcodes.td b/llvm/include/llvm/Target/GenericOpcodes.td
index 5323e1a0f2d..933bc0605af 100644
--- a/llvm/include/llvm/Target/GenericOpcodes.td
+++ b/llvm/include/llvm/Target/GenericOpcodes.td
@@ -967,9 +967,12 @@ def G_EXTRACT_VECTOR_ELT : GenericInstruction {
 }
 
 // Generic shufflevector.
+//
+// The mask operand should be an IR Constant which exactly matches the
+// corresponding mask for the IR shufflevector instruction.
 def G_SHUFFLE_VECTOR: GenericInstruction {
   let OutOperandList = (outs type0:$dst);
-  let InOperandList = (ins type1:$v1, type1:$v2, type2:$mask);
+  let InOperandList = (ins type1:$v1, type1:$v2, unknown:$mask);
   let hasSideEffects = 0;
 }