From cbc42abdb3c0a4c2cb6cd618d47c59aaa021939a Mon Sep 17 00:00:00 2001
From: Mary Guillemard <mary.guillemard@collabora.com>
Date: Tue, 4 Mar 2025 10:12:40 +0100
Subject: [PATCH] pan/bi: Run bifrost_nir_lower_algebraic_late while there is
 progress

With v11 needing specific lowering, we now need to run it multiple time
to ensure every new instructions materialized aren't invalid.

Signed-off-by: Mary Guillemard <mary.guillemard@collabora.com>
Reviewed-by: Benjamin Lee <benjamin.lee@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33867>
---
 src/panfrost/compiler/bifrost_compile.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/panfrost/compiler/bifrost_compile.c b/src/panfrost/compiler/bifrost_compile.c
index 635c4de716c..d1005802b4b 100644
--- a/src/panfrost/compiler/bifrost_compile.c
+++ b/src/panfrost/compiler/bifrost_compile.c
@@ -5177,8 +5177,13 @@ bi_optimize_nir(nir_shader *nir, unsigned gpu_id, bool is_blend)
    NIR_PASS(progress, nir, nir_lower_bool_to_bitsize);
 
    /* Prepass to simplify instruction selection */
-   late_algebraic = false;
-   NIR_PASS(late_algebraic, nir, bifrost_nir_lower_algebraic_late, pan_arch(gpu_id));
+   bool late_algebraic_progress = true;
+   while (late_algebraic_progress) {
+      late_algebraic_progress = false;
+      NIR_PASS(late_algebraic_progress, nir, bifrost_nir_lower_algebraic_late,
+               pan_arch(gpu_id));
+      late_algebraic |= late_algebraic_progress;
+   }
 
    while (late_algebraic) {
       late_algebraic = false;