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zink: fix crash in lower_pv_mode_gs_store

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src->parent can be null

Fixes: 39770c6503 ("zink: fix store subsitution in `lower_pv_mode_gs_store`")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24642>
This commit is contained in:
Mike Blumenkrantz 2023-08-11 15:16:51 -04:00 • committed by Marge Bot
parent 198719de39
commit 04dbb556c2
1 changed files with 3 additions and 1 deletions
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4
src/gallium/drivers/zink/zink_compiler.c
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@ -426,7 +426,9 @@ lower_pv_mode_gs_ring_index(nir_builder *b,
static nir_deref_instr*
replicate_derefs(nir_builder *b, nir_deref_instr *old, nir_deref_instr *new)
{
nir_deref_instr *parent = nir_src_as_deref(old->parent);
nir_deref_instr *parent = nir_deref_instr_parent(old);
if (!parent)
return new;
switch(old->deref_type) {
case nir_deref_type_var:
return new;