glsl/linker: specify proper direction in location aliasing error

The check for location aliasing was always asuming output variables
but this validation is also called for input variables.

Fixes: e2abb75b0e4 ("glsl/linker: validate explicit locations for SSO programs")
Cc: Iago Toral Quiroga <itoral@igalia.com>
Signed-off-by: Andres Gomez <agomez@igalia.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>

diff --git a/src/compiler/glsl/link_varyings.cpp b/src/compiler/glsl/link_varyings.cpp
index 52e493c..3969c01 100644 (file)
--- a/src/compiler/glsl/link_varyings.cpp
+++ b/src/compiler/glsl/link_varyings.cpp
@@ -481,9 +481,10 @@ check_location_aliasing(struct explicit_location_info explicit_locations[][4],
             /* Component aliasing is not alloed */
             if (comp >= component && comp < last_comp) {
                linker_error(prog,
-                            "%s shader has multiple outputs explicitly "
+                            "%s shader has multiple %sputs explicitly "
                             "assigned to location %d and component %d\n",
                             _mesa_shader_stage_to_string(stage),
+                            var->data.mode == ir_var_shader_in ? "in" : "out",
                             location, comp);
                return false;
             } else {
@@ -502,10 +503,12 @@ check_location_aliasing(struct explicit_location_info explicit_locations[][4],
 
                if (info->interpolation != interpolation) {
                   linker_error(prog,
-                               "%s shader has multiple outputs at explicit "
+                               "%s shader has multiple %sputs at explicit "
                                "location %u with different interpolation "
                                "settings\n",
-                               _mesa_shader_stage_to_string(stage), location);
+                               _mesa_shader_stage_to_string(stage),
+                               var->data.mode == ir_var_shader_in ?
+                               "in" : "out", location);
                   return false;
                }
 
@@ -513,9 +516,11 @@ check_location_aliasing(struct explicit_location_info explicit_locations[][4],
                    info->sample != sample ||
                    info->patch != patch) {
                   linker_error(prog,
-                               "%s shader has multiple outputs at explicit "
+                               "%s shader has multiple %sputs at explicit "
                                "location %u with different aux storage\n",
-                               _mesa_shader_stage_to_string(stage), location);
+                               _mesa_shader_stage_to_string(stage),
+                               var->data.mode == ir_var_shader_in ?
+                               "in" : "out", location);
                   return false;
                }
             }