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-rw-r--r--src/glsl/ast_to_hir.cpp15
1 files changed, 15 insertions, 0 deletions
diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp
index bfdf8e3791f..c06051f6271 100644
--- a/src/glsl/ast_to_hir.cpp
+++ b/src/glsl/ast_to_hir.cpp
@@ -1967,6 +1967,21 @@ apply_type_qualifier_to_variable(const struct ast_type_qualifier *qual,
_mesa_glsl_shader_target_name(state->target));
}
+ /* Section 6.1.1 (Function Calling Conventions) of the GLSL 1.10 spec says:
+ *
+ * "However, the const qualifier cannot be used with out or inout."
+ *
+ * The same section of the GLSL 4.40 spec further clarifies this saying:
+ *
+ * "The const qualifier cannot be used with out or inout, or a
+ * compile-time error results."
+ */
+ if (is_parameter && qual->flags.q.constant && qual->flags.q.out) {
+ _mesa_glsl_error(loc, state,
+ "`const' may not be applied to `out' or `inout' "
+ "function parameters");
+ }
+
/* If there is no qualifier that changes the mode of the variable, leave
* the setting alone.
*/