glsl: Save and restore the whole switch state for nesting.

This stuffs them all in a struct for sanity.  Fixes piglit
glsl-1.30/execution/switch/fs-uniform-nested.

NOTE: This is a candidate for the 8.0 branch.

Reviewed-by: Ian Romanick <[email protected]>

1 files changed, 10 insertions, 6 deletions

diff --git a/src/glsl/glsl_parser_extras.h b/src/glsl/glsl_parser_extras.h
index dd932951f4e..35d1e3aee26 100644
--- a/src/glsl/glsl_parser_extras.h
+++ b/src/glsl/glsl_parser_extras.h
@@ -42,6 +42,15 @@ enum _mesa_glsl_parser_targets {
 
 struct gl_context;
 
+struct glsl_switch_state {
+   /** Temporary variables needed for switch statement. */
+   ir_variable *test_var;
+   ir_variable *is_fallthru_var;
+   ir_variable *is_break_var;
+   class ast_switch_statement *switch_nesting_ast;
+   bool is_switch_innermost; // if switch stmt is closest to break, ...
+};
+
 struct _mesa_glsl_parse_state {
    _mesa_glsl_parse_state(struct gl_context *ctx, GLenum target,
 			  void *mem_ctx);
@@ -150,13 +159,8 @@ struct _mesa_glsl_parse_state {
 
    /** Loop or switch statement containing the current instructions. */
    class ast_iteration_statement *loop_nesting_ast;
-   class ast_switch_statement *switch_nesting_ast;
-   bool is_switch_innermost; // if switch stmt is closest to break, ...
 
-   /** Temporary variables needed for switch statement. */
-   ir_variable *test_var;
-   ir_variable *is_fallthru_var;
-   ir_variable *is_break_var;
+   struct glsl_switch_state switch_state;
 
    /** List of structures defined in user code. */
    const glsl_type **user_structures;