i965: Add new pass to split vectors into scalar variables

Combined with the previous pass, this lets other optimization passes
do their work thanks to ir_tree_grafting.  Still have regression in
instruction count with INTEL_NEW_FS, but register count is even
better.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index d16e75a2ca..9a6ee7a010 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -37,6 +37,7 @@ extern "C" {
 #include "talloc.h"
 }
 #include "../glsl/ir_optimization.h"
+#include "../glsl/ir_print_visitor.h"
 
 struct gl_shader *
 brw_new_shader(GLcontext *ctx, GLuint name, GLuint type)
@@ -87,6 +88,7 @@ brw_link_shader(GLcontext *ctx, struct gl_shader_program *prog)
       if (using_new_fs && shader->Type == GL_FRAGMENT_SHADER) {
 	 do_mat_op_to_vec(shader->ir);
 	 brw_do_channel_expressions(shader->ir);
+	 brw_do_vector_splitting(shader->ir);
       }
    }