Add either_arg matcher

src/include/migraph/matcher.hpp

@@ -310,6 +310,16 @@ auto args(Ms... ms)
     });
 }
 
+auto either_arg(std::size_t i, std::size_t j)
+{
+    return [=](auto m1, auto m2) {
+        return match::any_of(
+            match::all_of(arg(i)(m1), arg(j)(m2)), 
+            match::all_of(arg(j)(m1), arg(i)(m2))
+        );
+    };
+}
+
 } // namespace match
 
 } // namespace migraph

src/targets/gpu/fuse_ops.cpp

@@ -167,11 +167,10 @@ struct match_conv_bias
     context* ctx = nullptr;
     auto matcher() const
     {
-        return match::name("gpu::add")(match::any_of(
-            match::all_of(match::arg(0)(match::broadcast_shape().bind("bias")),
-                          match::arg(1)(match::name("gpu::convolution").bind("conv"))),
-            match::all_of(match::arg(1)(match::broadcast_shape().bind("bias")),
-                          match::arg(0)(match::name("gpu::convolution").bind("conv")))));
+        return match::name("gpu::add")(match::either_arg(0, 1)(
+            match::broadcast_shape().bind("bias"),
+            match::name("gpu::convolution").bind("conv")
+        ));
     }
 
     void apply(program& p, match::matcher_result r) const