i965/fs: Re-enable global copy propagation.

I believe the data flow analysis actually works now, and it should be
safe to re-enable global copy propagation.  It even does things now.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Paul Berry <stereotype441@gmail.com>

diff --git a/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp b/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
index 5ea8ea574ff6fbcbbbb3113caf917a5b3b3827d5..74644985c7060eaa9290862630f548d3dba97e8b 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
@@ -494,7 +494,6 @@ fs_visitor::opt_copy_propagate()
                                           out_acp[b]) || progress;
    }
 
-   #if 0
    /* Do dataflow analysis for those available copies. */
    fs_copy_prop_dataflow dataflow(mem_ctx, &cfg, out_acp);
 
@@ -514,7 +513,6 @@ fs_visitor::opt_copy_propagate()
 
       progress = opt_copy_propagate_local(mem_ctx, block, in_acp) || progress;
    }
-   #endif
 
    for (int i = 0; i < cfg.num_blocks; i++)
       delete [] out_acp[i];