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, 1 insertions, 1 deletions

diff --git a/src/intel/compiler/brw_vec4_dead_code_eliminate.cpp b/src/intel/compiler/brw_vec4_dead_code_eliminate.cpp
index 99e4c9cacaf..730d4349443 100644
--- a/src/intel/compiler/brw_vec4_dead_code_eliminate.cpp
+++ b/src/intel/compiler/brw_vec4_dead_code_eliminate.cpp
@@ -183,7 +183,7 @@ vec4_visitor::dead_code_eliminate()
    ralloc_free(flag_live);
 
    if (progress)
-      invalidate_live_intervals();
+      invalidate_analysis(DEPENDENCY_EVERYTHING);
 
    return progress;
 }