i965/fs: Invalidate live intervals in passes that remove an instruction.

Since live intervals are based on ip, removing an instruction trashes
the intervals unless we were to go do some surgery.  These happen to
usually remove a use of a grf, so it's time to recalculate, anyway.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
NOTE: This is a candidate for the 8.0 release branch.

diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 7c1096b775eb193a877800fecad5a86d76ebf1f1..175e36e4257f47ee54a8f036fc2f7825c15edae4 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -1844,6 +1844,9 @@ fs_visitor::compute_to_mrf()
       }
    }
 
+   if (progress)
+      live_intervals_valid = false;
+
    return progress;
 }
 
@@ -1920,6 +1923,9 @@ fs_visitor::remove_duplicate_mrf_writes()
       }
    }
 
+   if (progress)
+      live_intervals_valid = false;
+
    return progress;
 }