Generate more correctly diagnostics from some invalid initializers

diff --git a/ast_to_hir.cpp b/ast_to_hir.cpp
index ce64794..d6aa3bc 100644 (file)
--- a/ast_to_hir.cpp
+++ b/ast_to_hir.cpp
@@ -981,6 +981,8 @@ ast_declarator_list::hir(exec_list *instructions,
       instructions->push_tail(var);
 
       if (decl->initializer != NULL) {
+        YYLTYPE initializer_loc = decl->initializer->get_location();
+
         /* From page 24 (page 30 of the PDF) of the GLSL 1.10 spec:
          *
          *    "All uniform variables are read-only and are initialized either
@@ -989,10 +991,22 @@ ast_declarator_list::hir(exec_list *instructions,
          */
         if ((state->language_version <= 110)
             && (var->mode == ir_var_uniform)) {
-           YYLTYPE loc = decl->initializer->get_location();
+           _mesa_glsl_error(& initializer_loc, state,
+                            "cannot initialize uniforms in GLSL 1.10");
+        }
+
+        if (var->type->is_sampler()) {
+           _mesa_glsl_error(& initializer_loc, state,
+                            "cannot initialize samplers");
+        }
 
-           _mesa_glsl_error(& loc, state, "uniform initializers forbidden in "
-                            "GLSL 1.10");
+        if ((var->mode == ir_var_in) && (state->current_function == NULL)) {
+           _mesa_glsl_error(& initializer_loc, state,
+                            "cannot initialize %s shader input / %s",
+                            (state->target == vertex_shader)
+                            ? "vertex" : "fragment",
+                            (state->target == vertex_shader)
+                            ? "attribute" : "varying");
         }
 
         ir_dereference *const lhs = new ir_dereference(var);