diff --git a/llvm/lib/Target/SystemZ/CMakeLists.txt b/llvm/lib/Target/SystemZ/CMakeLists.txt
--- a/llvm/lib/Target/SystemZ/CMakeLists.txt
+++ b/llvm/lib/Target/SystemZ/CMakeLists.txt
@@ -5,7 +5,7 @@
 tablegen(LLVM SystemZGenAsmMatcher.inc -gen-asm-matcher)
 tablegen(LLVM SystemZGenAsmWriter.inc -gen-asm-writer)
 tablegen(LLVM SystemZGenCallingConv.inc -gen-callingconv)
-tablegen(LLVM SystemZGenDAGISel.inc -gen-dag-isel)
+tablegen(LLVM SystemZGenDAGISel.inc -gen-dag-isel -warn-on-unused-entities)
 tablegen(LLVM SystemZGenDisassemblerTables.inc -gen-disassembler)
 tablegen(LLVM SystemZGenInstrInfo.inc -gen-instr-info)
 tablegen(LLVM SystemZGenMCCodeEmitter.inc -gen-emitter)
diff --git a/llvm/lib/Target/SystemZ/SystemZOperators.td b/llvm/lib/Target/SystemZ/SystemZOperators.td
--- a/llvm/lib/Target/SystemZ/SystemZOperators.td
+++ b/llvm/lib/Target/SystemZ/SystemZOperators.td
@@ -725,12 +725,6 @@
 class loadu<SDPatternOperator operator, SDPatternOperator load = load>
   : PatFrag<(ops node:$addr), (operator (load node:$addr))>;
 
-// Create a store operator that performs the given unary operation
-// on the value before storing it.
-class storeu<SDPatternOperator operator, SDPatternOperator store = store>
-  : PatFrag<(ops node:$value, node:$addr),
-            (store (operator node:$value), node:$addr)>;
-
 // Create a store operator that performs the given inherent operation
 // and stores the resulting value.
 class storei<SDPatternOperator operator, SDPatternOperator store = store>