glsl2: Check for non-void functions that don't have a return statement.

This doesn't do any control flow analysis to ensure that the return
statements are actually reached.

Fixes piglit tests function5.frag and function-07.vert.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/glsl/glsl_parser_extras.h b/src/glsl/glsl_parser_extras.h
index cfe02e3b0c1..726bafa7e4b 100644
--- a/src/glsl/glsl_parser_extras.h
+++ b/src/glsl/glsl_parser_extras.h
@@ -51,6 +51,9 @@ struct _mesa_glsl_parse_state {
     */
    class ir_function_signature *current_function;
 
+   /** Have we found a return statement in this function? */
+   bool found_return;
+
    /** Was there an error during compilation? */
    bool error;