vc4: The r4_count is supposed to be how many writes, not reads.

It's part of the key so that you can tell which r4 value is being read.

diff --git a/src/gallium/drivers/vc4/vc4_opt_cse.c b/src/gallium/drivers/vc4/vc4_opt_cse.c
index bc91218..a9b5fda 100644 (file)
--- a/src/gallium/drivers/vc4/vc4_opt_cse.c
+++ b/src/gallium/drivers/vc4/vc4_opt_cse.c
@@ -173,7 +173,7 @@ qir_opt_cse(struct vc4_compile *c)
                         }
                 }
 
-                if (qir_reads_r4(inst))
+                if (qir_writes_r4(inst))
                         r4_count++;
         }