From bfc570ff9864601e52386c947dd57c260cd02860 Mon Sep 17 00:00:00 2001
From: Rhys Perry <pendingchaos02@gmail.com>
Date: Tue, 21 Jan 2025 15:49:35 +0000
Subject: [PATCH] nir/gcm: stop preserving nir_metadata_loop_analysis
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This pass changes instr_cost if it makes progress.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32005>
---
 src/compiler/nir/nir_opt_gcm.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/compiler/nir/nir_opt_gcm.c b/src/compiler/nir/nir_opt_gcm.c
index 0654f4d95b5..9d424b2faa2 100644
--- a/src/compiler/nir/nir_opt_gcm.c
+++ b/src/compiler/nir/nir_opt_gcm.c
@@ -857,8 +857,12 @@ opt_gcm_impl(nir_shader *shader, nir_function_impl *impl, bool value_number)
    ralloc_free(state.blocks);
    ralloc_free(state.instr_infos);
 
-   nir_metadata_preserve(impl, nir_metadata_control_flow |
-                                  nir_metadata_loop_analysis);
+   if (state.progress) {
+      nir_metadata_preserve(impl, nir_metadata_control_flow);
+   } else {
+      nir_metadata_preserve(impl, nir_metadata_control_flow |
+                                     nir_metadata_loop_analysis);
+   }
 
    return state.progress;
 }