Only allow global precision qualifier for int and float

This causes the following tests to pass:

    glslparsertest/glsl2/precision-03.vert

1 files changed, 7 insertions, 0 deletions

diff --git a/glsl_parser.ypp b/glsl_parser.ypp
index 4de1ec9591..99c6ca132c 100644
--- a/glsl_parser.ypp
+++ b/glsl_parser.ypp
@@ -628,6 +628,13 @@ declaration:
 	}
 	| PRECISION precision_qualifier type_specifier_no_prec ';'
 	{
+	   if (($3->type_specifier != ast_float)
+	       && ($3->type_specifier != ast_int)) {
+	      _mesa_glsl_error(& @3, state, "global precision qualifier can "
+			       "only be applied to `int' or `float'\n");
+	      YYERROR;
+	   }
+
 	   $$ = NULL; /* FINISHME */
 	}
 	;