[wasm] Implement simd lowering for F32x4 and I32x4 compare ops

src/compiler/simd-scalar-lowering.h

Index: src/compiler/simd-scalar-lowering.h
diff --git a/src/compiler/simd-scalar-lowering.h b/src/compiler/simd-scalar-lowering.h
index 5a6625379273b01e35f38c57467af3e7538e86ab..cfd369a310b70dc6c5618bee43567f85b8099f79 100644
--- a/src/compiler/simd-scalar-lowering.h
+++ b/src/compiler/simd-scalar-lowering.h
@@ -28,7 +28,7 @@ class SimdScalarLowering {
  private:
   enum class State : uint8_t { kUnvisited, kOnStack, kVisited };
 
-  enum class SimdType : uint8_t { kInt32, kFloat32 };
+  enum class SimdType : uint8_t { kInt32, kFloat32, kSimd1x4 };
 
   static const int kMaxLanes = 4;
   static const int kLaneWidth = 16 / kMaxLanes;
@@ -59,12 +59,14 @@ class SimdScalarLowering {
                    const Operator* load_op);
   void LowerStoreOp(MachineRepresentation rep, Node* node,
                     const Operator* store_op, SimdType rep_type);
-  void LowerBinaryOp(Node* node, SimdType input_rep_type, const Operator* op);
+  void LowerBinaryOp(Node* node, SimdType input_rep_type, const Operator* op,
+                     bool invert_inputs = false);
   void LowerUnaryOp(Node* node, SimdType input_rep_type, const Operator* op);
   void LowerIntMinMax(Node* node, const Operator* op, bool is_max);
   void LowerConvertFromFloat(Node* node, bool is_signed);
   void LowerShiftOp(Node* node, const Operator* op);
   Node* BuildF64Trunc(Node* input);
+  void LowerNotEqual(Node* node, SimdType input_rep_type, const Operator* op);
 
   struct NodeState {
     Node* node;