Revert "i965/fs: Change fs_visitor::emit_lrp to use MAC for gen<6"

[mesa.git] / src / glsl / ast_to_hir.cpp

diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp
index f257a24868047aa0e1960c077c0c24b5f6d546e7..0128b3f4e82f8e872bb8e872955c49429d6416ae 100644 (file)
--- a/src/glsl/ast_to_hir.cpp
+++ b/src/glsl/ast_to_hir.cpp
@@ -123,6 +123,11 @@ _mesa_ast_to_hir(exec_list *instructions, struct _mesa_glsl_parse_state *state)
       instructions->push_head(var);
    }
 
+   /* Figure out if gl_FragCoord is actually used in fragment shader */
+   ir_variable *const var = state->symbols->get_variable("gl_FragCoord");
+   if (var != NULL)
+      state->fs_uses_gl_fragcoord = var->data.used;
+
    /* From section 7.1 (Built-In Language Variables) of the GLSL 4.10 spec:
     *
     *     If multiple shaders using members of a built-in block belonging to
@@ -794,11 +799,10 @@ do_assignment(exec_list *instructions, struct _mesa_glsl_parse_state *state,
                           "assignment to %s",
                           non_lvalue_description);
          error_emitted = true;
-      } else if (lhs->variable_referenced() != NULL
-                 && lhs->variable_referenced()->data.read_only) {
+      } else if (lhs_var != NULL && lhs_var->data.read_only) {
          _mesa_glsl_error(&lhs_loc, state,
                           "assignment to read-only variable '%s'",
-                          lhs->variable_referenced()->name);
+                          lhs_var->name);
          error_emitted = true;
       } else if (lhs->type->is_array() &&
                  !state->check_version(120, 300, &lhs_loc,