Mesa (master): glsl: Disallow primitive type layout qualifier on variables.

[Chris Forbes]

Module: Mesa
Branch: master
Commit: 91b8ecbe1c134604fc87b3761a308b15a6caf394
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=91b8ecbe1c134604fc87b3761a308b15a6caf394

Author: Chris Forbes <chrisf at ijw.co.nz>
Date:   Thu Jun 12 21:17:13 2014 +1200

glsl: Disallow primitive type layout qualifier on variables.

This only makes any sense on the GS input or output layout declaration,
nowhere else.

Fixes the piglit tests:

  * spec/glsl-1.50/compiler/incorrect-in-layout-qualifiers-with-variable-declarations.geom
  * spec/glsl-1.50/compiler/incorrect-out-layout-qualifiers-with-variable-declarations.geom
  * spec/glsl-1.50/compiler/layout-fs-no-output.frag
  * spec/glsl-1.50/compiler/layout-vs-no-input.vert
  * spec/glsl-1.50/compiler/layout-vs-no-output.vert

Signed-off-by: Chris Forbes <chrisf at ijw.co.nz>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

---

 src/glsl/ast_to_hir.cpp |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp
index 132a955..92e0f90 100644
--- a/src/glsl/ast_to_hir.cpp
+++ b/src/glsl/ast_to_hir.cpp
@@ -2469,6 +2469,13 @@ apply_type_qualifier_to_variable(const struct ast_type_qualifier *qual,
                        _mesa_shader_stage_to_string(state->stage));
    }
 
+   /* Disallow layout qualifiers which may only appear on layout declarations. */
+   if (qual->flags.q.prim_type) {
+      _mesa_glsl_error(loc, state,
+                       "Primitive type may only be specified on GS input or output "
+                       "layout declaration, not on variables.");
+   }
+
    /* 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."