From 1bd9c1b95890de05ccbe1b0b3c849ee7eb1b84b5 Mon Sep 17 00:00:00 2001
From: Faith Ekstrand <faith.ekstrand@collabora.com>
Date: Tue, 19 Mar 2024 22:31:02 -0500
Subject: [PATCH] nir: Mark divergent regs in phis_to_regs_block()
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This way we avoid destroying divergence information which may be used by
passes which also need to lower phis.

Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28300>
---
 src/compiler/nir/nir_from_ssa.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/compiler/nir/nir_from_ssa.c b/src/compiler/nir/nir_from_ssa.c
index 83a57e32df3..d7bf90a6b4e 100644
--- a/src/compiler/nir/nir_from_ssa.c
+++ b/src/compiler/nir/nir_from_ssa.c
@@ -1169,6 +1169,7 @@ nir_lower_phis_to_regs_block(nir_block *block)
    bool progress = false;
    nir_foreach_phi_safe(phi, block) {
       nir_def *reg = decl_reg_for_ssa_def(&b, &phi->def);
+      set_reg_divergent(reg, phi->def.divergent);
 
       b.cursor = nir_after_instr(&phi->instr);
       nir_def_rewrite_uses(&phi->def, nir_load_reg(&b, reg));