diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyISelDAGToDAG.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyISelDAGToDAG.cpp
--- a/llvm/lib/Target/WebAssembly/WebAssemblyISelDAGToDAG.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyISelDAGToDAG.cpp
@@ -35,12 +35,10 @@
   /// right decision when generating code for different targets.
   const WebAssemblySubtarget *Subtarget;
 
-  bool ForCodeSize;
-
 public:
   WebAssemblyDAGToDAGISel(WebAssemblyTargetMachine &TM,
                           CodeGenOpt::Level OptLevel)
-      : SelectionDAGISel(TM, OptLevel), Subtarget(nullptr), ForCodeSize(false) {
+      : SelectionDAGISel(TM, OptLevel), Subtarget(nullptr) {
   }
 
   StringRef getPassName() const override {
@@ -52,7 +50,6 @@
                          "********** Function: "
                       << MF.getName() << '\n');
 
-    ForCodeSize = MF.getFunction().hasOptSize();
     Subtarget = &MF.getSubtarget<WebAssemblySubtarget>();
 
     // Wasm64 is not fully supported right now (and is not specified)