From 5132d0c7b695d838617bf586e730899c65361668 Mon Sep 17 00:00:00 2001
From: Andres Gomez <agomez@igalia.com>
Date: Sat, 22 Oct 2016 17:04:33 +0300
Subject: [PATCH] glsl: simplified error checking for duplicated
 layout-qualifiers

The GLSL parser has been simplified to check for the needed
GL_ARB_shading_language_420pack extension just when merging the
qualifiers in the proper cases.

Reviewed-by: Timothy Arceri <timothy.arceri@collabora.com>
Signed-off-by: Andres Gomez <agomez@igalia.com>
---
 src/compiler/glsl/ast_type.cpp   |  6 ++++++
 src/compiler/glsl/glsl_parser.yy | 24 ------------------------
 2 files changed, 6 insertions(+), 24 deletions(-)

diff --git a/src/compiler/glsl/ast_type.cpp b/src/compiler/glsl/ast_type.cpp
index bfe1d2f..788f734 100644
--- a/src/compiler/glsl/ast_type.cpp
+++ b/src/compiler/glsl/ast_type.cpp
@@ -268,6 +268,12 @@ ast_type_qualifier::merge_qualifier(YYLTYPE *loc,
       return false;
    }
 
+   if (is_multiple_layouts_merge && !state->has_420pack_or_es31()) {
+      _mesa_glsl_error(loc, state,
+                       "duplicate layout(...) qualifiers");
+      return false;
+   }
+
    if (q.flags.q.prim_type) {
       r &= validate_prim_type(loc, state, *this, q);
       this->flags.q.prim_type = 1;
diff --git a/src/compiler/glsl/glsl_parser.yy b/src/compiler/glsl/glsl_parser.yy
index 5529f11..9136fdd 100644
--- a/src/compiler/glsl/glsl_parser.yy
+++ b/src/compiler/glsl/glsl_parser.yy
@@ -1887,9 +1887,6 @@ type_qualifier:
        * precise qualifiers since these are useful in ARB_separate_shader_objects.
        * There is no clear spec guidance on this either.
        */
-      if (!state->has_420pack_or_es31() && $2.has_layout())
-         _mesa_glsl_error(&@1, state, "duplicate layout(...) qualifiers");
-
       $$ = $1;
       $$.merge_qualifier(& @1, state, $2, false, $2.has_layout());
    }
@@ -2713,11 +2710,6 @@ interface_block:
    {
       ast_interface_block *block = (ast_interface_block *) $2;
 
-      if (!state->has_420pack_or_es31() && block->layout.has_layout()) {
-         _mesa_glsl_error(&@1, state, "duplicate layout(...) qualifiers");
-         YYERROR;
-      }
-
       if (!$1.merge_qualifier(& @1, state, block->layout, false,
                               block->layout.has_layout())) {
          YYERROR;
@@ -2855,10 +2847,6 @@ layout_uniform_defaults:
    layout_qualifier layout_uniform_defaults
    {
       $$ = $1;
-      if (!state->has_420pack_or_es31()) {
-         _mesa_glsl_error(&@1, state, "duplicate layout(...) qualifiers");
-         YYERROR;
-      }
       if (!$$.merge_qualifier(& @1, state, $2, false, true)) {
          YYERROR;
       }
@@ -2870,10 +2858,6 @@ layout_buffer_defaults:
    layout_qualifier layout_buffer_defaults
    {
       $$ = $1;
-      if (!state->has_420pack_or_es31()) {
-         _mesa_glsl_error(&@1, state, "duplicate layout(...) qualifiers");
-         YYERROR;
-      }
       if (!$$.merge_qualifier(& @1, state, $2, false, true)) {
          YYERROR;
       }
@@ -2885,10 +2869,6 @@ layout_in_defaults:
    layout_qualifier layout_in_defaults
    {
       $$ = $1;
-      if (!state->has_420pack_or_es31()) {
-         _mesa_glsl_error(&@1, state, "duplicate layout(...) qualifiers");
-         YYERROR;
-      }
       if (!$$.merge_qualifier(& @1, state, $2, false, true)) {
          YYERROR;
       }
@@ -2908,10 +2888,6 @@ layout_out_defaults:
    layout_qualifier layout_out_defaults
    {
       $$ = $1;
-      if (!state->has_420pack_or_es31()) {
-         _mesa_glsl_error(&@1, state, "duplicate layout(...) qualifiers");
-         YYERROR;
-      }
       if (!$$.merge_qualifier(& @1, state, $2, false, true)) {
          YYERROR;
       }
-- 
2.7.4