llvm, mechanism: Use Parameter class to build a list of needed parame…

…ter ports

Names of Parameter and ParameterPort don't have to match if there are
multiple parameters with the same name. (Like 'seed' in DDM with DDI
function).
Add test modulating seed of DDI within DDM.

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>

psyneulink/core/components/mechanisms/mechanism.py

@@ -2915,24 +2915,26 @@ def _gen_llvm_param_ports_for_obj(self, obj, params_in, ctx, builder,
         # Few extra copies will be eliminated by the compiler.
         builder.store(builder.load(params_in), params_out)
 
-        # Filter out param ports without corresponding params for this function
-        param_ports = [p for p in self._parameter_ports if p.name in obj.llvm_param_ids]
+        # This should be faster than 'obj._get_compilation_params'
+        compilation_params = (getattr(obj.parameters, p_id, None) for p_id in obj.llvm_param_ids)
+        # Filter out param ports without corresponding param for this function
+        param_ports = [self._parameter_ports[param] for param in compilation_params if param in self._parameter_ports]
 
         def _get_output_ptr(b, i):
             ptr = pnlvm.helpers.get_param_ptr(b, obj, params_out,
-                                              param_ports[i].name)
+                                              param_ports[i].source.name)
             return b, ptr
 
         def _fill_input(b, p_input, i):
-            param_in_ptr = pnlvm.helpers.get_param_ptr(b, obj, params_in,
-                                                       param_ports[i].name)
+            param_ptr = pnlvm.helpers.get_param_ptr(b, obj, params_in,
+                                                    param_ports[i].source.name)
             # Parameter port inputs are {original parameter, [modulations]},
-            # fill in the first one.
+            # here we fill in the first one.
             data_ptr = builder.gep(p_input, [ctx.int32_ty(0), ctx.int32_ty(0)])
-            assert data_ptr.type == param_in_ptr.type, \
+            assert data_ptr.type == param_ptr.type, \
                 "Mishandled modulation type for: {} in '{}' in '{}'".format(
                     param_ports[i].name, obj.name, self.name)
-            b.store(b.load(param_in_ptr), data_ptr)
+            b.store(b.load(param_ptr), data_ptr)
             return b
 
         builder = self._gen_llvm_ports(ctx, builder, param_ports, "_parameter_ports",

tests/composition/test_control.py

@@ -1105,6 +1105,28 @@ def test_modulation_of_random_state_direct(self, comp_mode, benchmark):
 
         assert np.allclose(np.squeeze(comp.results[:len(seeds) * 2]), expected)
 
+    @pytest.mark.benchmark
+    @pytest.mark.control
+    @pytest.mark.composition
+    # 'LLVM' mode is not supported, because synchronization of compiler and
+    # python values during execution is not implemented.
+    @pytest.mark.usefixtures("comp_mode_no_llvm")
+    def test_modulation_of_random_state_DDM(self, comp_mode, benchmark):
+        # set explicit seed to make sure modulation is different
+        mech = pnl.DDM(function=pnl.DriftDiffusionIntegrator(noise=5.),
+                       reset_stateful_function_when=pnl.AtPass(0),
+                       execute_until_finished=True)
+        ctl_mech = pnl.ControlMechanism(control_signals=pnl.ControlSignal(modulates=('seed-function', mech),
+                                                                          modulation=pnl.OVERRIDE))
+        comp = pnl.Composition()
+        comp.add_node(mech, required_roles=pnl.NodeRole.INPUT)
+        comp.add_node(ctl_mech)
+
+        seeds = [13, 13, 14]
+        # cycle over the seeds twice setting and resetting the random state
+        benchmark(comp.run, inputs={ctl_mech:seeds, mech:5.0}, num_trials=len(seeds) * 2, execution_mode=comp_mode)
+
+        assert np.allclose(np.squeeze(comp.results[:len(seeds) * 2]), [[100, 21], [100, 23], [100, 20]] * 2)
 
     @pytest.mark.control
     @pytest.mark.composition