[Mesa-dev] [PATCH 1/3] glsl: Parse shared keyword for compute shader variables

[Jordan Justen]

Signed-off-by: Jordan Justen <jordan.l.justen at intel.com>
---

Notes:
    git://people.freedesktop.org/~jljusten/mesa cs-parse-shared-vars-v1
    http://patchwork.freedesktop.org/bundle/jljusten/cs-parse-shared-vars-v1
    
    With these environment overrides:
    
      export MESA_GL_VERSION_OVERRIDE=4.3
      export MESA_GLSL_VERSION_OVERRIDE=430
      export MESA_EXTENSION_OVERRIDE=GL_ARB_compute_shader
    
    This fixes my recently posted piglit test:
    
      tests/spec/arb_compute_shader/compiler/shared-variables.comp
      http://patchwork.freedesktop.org/patch/63944/

 src/glsl/ast_to_hir.cpp | 2 +-
 src/glsl/glsl_lexer.ll  | 2 ++
 src/glsl/glsl_parser.yy | 6 ++++++
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp
index 0306530..dd5ba4e 100644
--- a/src/glsl/ast_to_hir.cpp
+++ b/src/glsl/ast_to_hir.cpp
@@ -3081,7 +3081,7 @@ apply_type_qualifier_to_variable(const struct ast_type_qualifier *qual,
    if (qual->flags.q.std140 ||
        qual->flags.q.std430 ||
        qual->flags.q.packed ||
-       qual->flags.q.shared) {
+       (qual->flags.q.shared && (state->stage != MESA_SHADER_COMPUTE))) {
       _mesa_glsl_error(loc, state,
                        "uniform and shader storage block layout qualifiers "
                        "std140, std430, packed, and shared can only be "
diff --git a/src/glsl/glsl_lexer.ll b/src/glsl/glsl_lexer.ll
index 2142817..e59f93e 100644
--- a/src/glsl/glsl_lexer.ll
+++ b/src/glsl/glsl_lexer.ll
@@ -414,6 +414,8 @@ writeonly      KEYWORD_WITH_ALT(420, 300, 420, 310, yyextra->ARB_shader_image_lo
 
 atomic_uint     KEYWORD_WITH_ALT(420, 300, 420, 310, yyextra->ARB_shader_atomic_counters_enable, ATOMIC_UINT);
 
+shared          KEYWORD_WITH_ALT(430, 310, 430, 310, yyextra->ARB_compute_shader_enable, SHARED);
+
 struct		return STRUCT;
 void		return VOID_TOK;
 
diff --git a/src/glsl/glsl_parser.yy b/src/glsl/glsl_parser.yy
index 4636435..2598356 100644
--- a/src/glsl/glsl_parser.yy
+++ b/src/glsl/glsl_parser.yy
@@ -165,6 +165,7 @@ static bool match_layout_qualifier(const char *s1, const char *s2,
 %token IMAGE1DSHADOW IMAGE2DSHADOW IMAGE1DARRAYSHADOW IMAGE2DARRAYSHADOW
 %token COHERENT VOLATILE RESTRICT READONLY WRITEONLY
 %token ATOMIC_UINT
+%token SHARED
 %token STRUCT VOID_TOK WHILE
 %token <identifier> IDENTIFIER TYPE_IDENTIFIER NEW_IDENTIFIER
 %type <identifier> any_identifier
@@ -1958,6 +1959,11 @@ memory_qualifier:
       memset(& $$, 0, sizeof($$));
       $$.flags.q.write_only = 1;
    }
+   | SHARED
+   {
+      memset(& $$, 0, sizeof($$));
+      $$.flags.q.shared = 1;
+   }
    ;
 
 array_specifier:
-- 
2.6.2