glsl: validate linking of intrastage component qualifiers

Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>

diff --git a/src/compiler/glsl/linker.cpp b/src/compiler/glsl/linker.cpp
index 975b299db55e82ed3bd6c01e32165099487aa10a..f7b884e0173eb671a37e85b6ee1bfc1804a4da78 100644 (file)
--- a/src/compiler/glsl/linker.cpp
+++ b/src/compiler/glsl/linker.cpp
@@ -988,6 +988,13 @@ cross_validate_globals(struct gl_shader_program *prog,
                     return;
               }
 
+              if (var->data.location_frac != existing->data.location_frac) {
+                    linker_error(prog, "explicit components for %s "
+                                 "`%s' have differing values\n",
+                                 mode_string(var), var->name);
+                    return;
+              }
+
               existing->data.location = var->data.location;
               existing->data.explicit_location = true;
            } else {