intel/compiler: Introduce backend_shader method to propagate IR changes to analysis passes

The invalidate_analysis() method knows what analysis passes there are
in the back-end and calls their invalidate() method to report changes
in the IR.  For the moment it just calls invalidate_live_intervals()
(which will eventually be fully replaced by this function) if anything
changed.

This makes all optimization passes invalidate DEPENDENCY_EVERYTHING,
which is clearly far from ideal -- The dependency classes passed to
invalidate_analysis() will be refined in a future commit.

Reviewed-by: Matt Turner <[email protected]>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4012>

1 files changed, 3 insertions, 1 deletions

diff --git a/src/intel/compiler/brw_fs_register_coalesce.cpp b/src/intel/compiler/brw_fs_register_coalesce.cpp
index 8127b29369c..8a87619dbe1 100644
--- a/src/intel/compiler/brw_fs_register_coalesce.cpp
+++ b/src/intel/compiler/brw_fs_register_coalesce.cpp
@@ -44,6 +44,8 @@
 #include "brw_cfg.h"
 #include "brw_fs_live_variables.h"
 
+using namespace brw;
+
 static bool
 is_nop_mov(const fs_inst *inst)
 {
@@ -288,7 +290,7 @@ fs_visitor::register_coalesce()
          }
       }
 
-      invalidate_live_intervals();
+      invalidate_analysis(DEPENDENCY_EVERYTHING);
    }
 
    return progress;