Add an ir_if simplification pass.

This is relatively simple at the moment, recognizing only constant
values, and not (for example) values that are restricted to a range
that make the branching constant.  However, it does remove 59 lines
from the printout of CorrectParse2.vert.

1 files changed, 2 insertions, 0 deletions

diff --git a/glsl_parser_extras.cpp b/glsl_parser_extras.cpp
index 38dee95c35..455bf0c7a4 100644
--- a/glsl_parser_extras.cpp
+++ b/glsl_parser_extras.cpp
@@ -36,6 +36,7 @@
 #include "glsl_parser.h"
 #include "ir_constant_folding.h"
 #include "ir_function_inlining.h"
+#include "ir_if_simplification.h"
 #include "ir_print_visitor.h"
 
 const char *
@@ -759,6 +760,7 @@ main(int argc, char **argv)
 	 progress = false;
 
 	 progress = do_function_inlining(&instructions) || progress;
+	 progress = do_if_simplification(&instructions) || progress;
 
 	 /* Constant folding */
 	 ir_constant_folding_visitor constant_folding;