glsl/parser: Track built-in types using the glsl_type directly

Without the lexer changes, tests/glslparsertest/glsl2/tex_rect-02.frag
fails.  Before this change, the parser would determine that
sampler2DRect is not a valid type because the call to
state->symbols->get_type() in ast_type_specifier::glsl_type() would
return NULL.  Since ast_type_specifier::glsl_type() is now going to
return the glsl_type pointer that it received from the lexer, it doesn't
have an opportunity to generate an error.

   text	   data	    bss	    dec	    hex	filename
8255243	 268856	 294072	8818171	 868dfb	32-bit i965_dri.so before
8255291	 268856	 294072	8818219	 868e2b	32-bit i965_dri.so after
7815195	 345592	 420592	8581379	 82f103	64-bit i965_dri.so before
7815339	 345592	 420592	8581523	 82f193	64-bit i965_dri.so after

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

src/compiler/glsl/ast.h

@@ -27,6 +27,7 @@
 
 #include "list.h"
 #include "glsl_parser_extras.h"
+#include "compiler/glsl_types.h"
 
 struct _mesa_glsl_parse_state;
 
@@ -853,7 +854,7 @@ class ast_type_specifier : public ast_node {
 public:
    /** Construct a type specifier from a type name */
    ast_type_specifier(const char *name) 
-      : type_name(name), structure(NULL), array_specifier(NULL),
+      : type(NULL), type_name(name), structure(NULL), array_specifier(NULL),
 	default_precision(ast_precision_none)
    {
       /* empty */
@@ -861,12 +862,19 @@ public:
 
    /** Construct a type specifier from a structure definition */
    ast_type_specifier(ast_struct_specifier *s)
-      : type_name(s->name), structure(s), array_specifier(NULL),
+      : type(NULL), type_name(s->name), structure(s), array_specifier(NULL),
 	default_precision(ast_precision_none)
    {
       /* empty */
    }
 
+   ast_type_specifier(const glsl_type *t)
+      : type(t), type_name(t->name), structure(NULL), array_specifier(NULL),
+        default_precision(ast_precision_none)
+   {
+      /* empty */
+   }
+
    const struct glsl_type *glsl_type(const char **name,
 				     struct _mesa_glsl_parse_state *state)
       const;
@@ -875,6 +883,7 @@ public:
 
    ir_rvalue *hir(exec_list *, struct _mesa_glsl_parse_state *);
 
+   const struct glsl_type *type;
    const char *type_name;
    ast_struct_specifier *structure;
 

src/compiler/glsl/ast_to_hir.cpp

@@ -2361,7 +2361,9 @@ ast_type_specifier::glsl_type(const char **name,
 {
    const struct glsl_type *type;
 
-   if (structure)
+   if (this->type != NULL)
+      type = this->type;
+   else if (structure)
       type = structure->type;
    else
       type = state->symbols->get_type(this->type_name);

src/compiler/glsl/glsl_lexer.ll

@@ -132,18 +132,23 @@ static int classify_identifier(struct _mesa_glsl_parse_state *, const char *,
 /**
  * Like DEPRECATED_ES_KEYWORD, but for types
  */
-#define DEPRECATED_ES_TYPE(gtype)					\
+#define DEPRECATED_ES_TYPE_WITH_ALT(alt_expr, gtype)			\
    do {									\
       if (yyextra->is_version(0, 300)) {				\
-	 _mesa_glsl_error(yylloc, yyextra,				\
-			  "illegal use of reserved word `%s'", yytext);	\
-	 return ERROR_TOK;						\
-      } else {								\
-	 yylval->type = gtype;						\
+         _mesa_glsl_error(yylloc, yyextra,				\
+                          "illegal use of reserved word `%s'", yytext);	\
+         return ERROR_TOK;						\
+      } else if (alt_expr) {						\
+         yylval->type = gtype;						\
          return BASIC_TYPE_TOK;						\
+      } else {								\
+         return classify_identifier(yyextra, yytext, yyleng, yylval);	\
       }									\
    } while (0)
 
+#define DEPRECATED_ES_TYPE(gtype)					\
+   DEPRECATED_ES_TYPE_WITH_ALT(true, gtype)
+
 static int
 literal_integer(char *text, int len, struct _mesa_glsl_parse_state *state,
 		YYSTYPE *lval, YYLTYPE *lloc, int base)
@@ -619,9 +624,9 @@ dmat4x4		TYPE_WITH_ALT(110, 100, 400, 0, yyextra->ARB_gpu_shader_fp64_enable, gl
 fvec2		KEYWORD(110, 100, 0, 0, FVEC2);
 fvec3		KEYWORD(110, 100, 0, 0, FVEC3);
 fvec4		KEYWORD(110, 100, 0, 0, FVEC4);
-sampler2DRect		DEPRECATED_ES_TYPE(glsl_type::sampler2DRect_type);
+sampler2DRect		DEPRECATED_ES_TYPE_WITH_ALT(yyextra->ARB_texture_rectangle_enable, glsl_type::sampler2DRect_type);
 sampler3DRect		KEYWORD(110, 100, 0, 0, SAMPLER3DRECT);
-sampler2DRectShadow	DEPRECATED_ES_TYPE(glsl_type::sampler2DRectShadow_type);
+sampler2DRectShadow	DEPRECATED_ES_TYPE_WITH_ALT(yyextra->ARB_texture_rectangle_enable, glsl_type::sampler2DRectShadow_type);
 sizeof		KEYWORD(110, 100, 0, 0, SIZEOF);
 cast		KEYWORD(110, 100, 0, 0, CAST);
 namespace	KEYWORD(110, 100, 0, 0, NAMESPACE);

src/compiler/glsl/glsl_parser.yy

@@ -2189,7 +2189,7 @@ type_specifier_nonarray:
    basic_type_specifier_nonarray
    {
       void *ctx = state->linalloc;
-      $$ = new(ctx) ast_type_specifier($1->name);
+      $$ = new(ctx) ast_type_specifier($1);
       $$->set_location(@1);
    }
    | struct_specifier