59                                       const double gradient) {  in ValueAndGradientSample()  argument
63   sample.gradient = gradient;  in ValueAndGradientSample()
261                          ? &current.gradient : NULL);  in Search()
311                          ? &current.gradient : NULL);  in Search()
486                          &current.gradient);  in BracketingPhase()
495                           * initial_position.gradient  in BracketingPhase()
513         fabs(current.gradient) <=  in BracketingPhase()
514         -options().sufficient_curvature_decrease * initial_position.gradient) {  in BracketingPhase()
526     } else if (current.value_is_valid && current.gradient >= 0) {  in BracketingPhase()
622                            &current.gradient);  in BracketingPhase()
673   if (bracket_low.gradient * (bracket_high.x - bracket_low.x) >= 0) {  in ZoomPhase()
690                      bracket_low.gradient * (bracket_high.x - bracket_low.x),  in ZoomPhase()
769                            &solution->gradient);  in ZoomPhase()
790                             * initial_position.gradient  in ZoomPhase()
800     if (fabs(solution->gradient) <=  in ZoomPhase()
801         -options().sufficient_curvature_decrease * initial_position.gradient) {  in ZoomPhase()
809     } else if (solution->gradient * (bracket_high.x - bracket_low.x) >= 0) {  in ZoomPhase()