i965: Do lowering of array indexing of a vector in the FS.

Fixes a regression in ember since switching to the native FS backend,
and the new piglit tests glsl-fs-vec4-indexing-{2,3} for catching this.

diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 30b2869..22e6e2e 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -118,6 +118,7 @@ brw_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)
         lower_if_to_cond_assign(shader->ir, 16);
 
       do_lower_texture_projection(shader->ir);
+      do_vec_index_to_cond_assign(shader->ir);
       brw_do_cubemap_normalize(shader->ir);
 
       do {