agx: Remove has_liveness

Given we do no metadata tracking, this is an accident waiting to happen.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16268>

src/asahi/compiler/agx_compiler.h

@@ -411,9 +411,6 @@ typedef struct {
    /* Has r0l been zeroed yet due to control flow? */
    bool any_cf;
 
-   /** Computed metadata */
-   bool has_liveness;
-
    /* Number of nested control flow structures within the innermost loop. Since
     * NIR is just loop and if-else, this is the number of nested if-else
     * statements in the loop */

src/asahi/compiler/agx_liveness.c

@@ -60,9 +60,6 @@ agx_liveness_ins_update(BITSET_WORD *live, agx_instr *I)
 void
 agx_compute_liveness(agx_context *ctx)
 {
-   if (ctx->has_liveness)
-      return;
-
    u_worklist worklist;
    u_worklist_init(&worklist, ctx->num_blocks, NULL);
 
@@ -142,6 +139,4 @@ agx_compute_liveness(agx_context *ctx)
    }
 
    u_worklist_fini(&worklist);
-
-   ctx->has_liveness = true;
 }