Fix used_once fusions

src/pass_manager.cpp

@@ -94,6 +94,7 @@ struct module_pm : module_pass_manager
     virtual module* get_common_parent() override { return common_parent; }
     virtual void run_pass(const pass& p) override
     {
+        trace("Pass: ", p.name());
         assert(mod);
         assert(mod->validate() == mod->end());
         if(enabled(MIGRAPHX_TIME_PASSES{}))

src/simplify_algebra.cpp

@@ -270,7 +270,7 @@ struct find_dot_mul
     auto matcher() const
     {
         auto const_broadcast = match::name("broadcast", "multibroadcast")(match::is_constant());
-        auto mul             = match::name("mul")(match::either_arg(0, 1)(
+        auto mul             = match::name("mul")(match::used_once(), match::either_arg(0, 1)(
             const_broadcast.bind("d"), match::none_of(match::is_constant()).bind("z")));
         return match::name("dot")(match::either_arg(0, 1)(mul, match::is_constant().bind("c")));
     }

src/targets/gpu/fuse_ops.cpp

@@ -770,7 +770,7 @@ struct find_contiguous_pointwise
 {
     auto matcher() const
     {
-        return match::name("gpu::contiguous")(match::arg(0)(precompile_name("pointwise")));
+        return match::name("gpu::contiguous")(match::arg(0)(precompile_name("pointwise")(match::used_once())));
     }
 
     void apply(module& m, const match::matcher_result& r) const
@@ -790,7 +790,7 @@ struct find_layernorm_pointwise
     auto matcher() const
     {
         return precompile_name("pointwise")(match::arg(0)(
-            precompile_name("gpu::prelayernorm", "gpu::preadd_layernorm").bind("layernorm")));
+            precompile_name("gpu::prelayernorm", "gpu::preadd_layernorm")(match::used_once()).bind("layernorm")));
     }
 
     void apply(module& m, const match::matcher_result& r) const
@@ -813,7 +813,7 @@ struct find_concat_pointwise
     auto matcher() const
     {
         return precompile_name("pointwise")(
-            match::arg(0)(precompile_name("concat").bind("concat")));
+            match::arg(0)(precompile_name("concat")(match::used_once()).bind("concat")));
     }
 
     void apply(module& m, const match::matcher_result& r) const