Mesa (master): lima/ppir: fix pointer referenced after a free

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Module: Mesa
Branch: master
Commit: 812288bf0f65c360fd93803d14f1c74754835535
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=812288bf0f65c360fd93803d14f1c74754835535

Author: Patrick Lerda <patrick9876 at free.fr>
Date:   Mon Apr 29 10:43:51 2019 +0200

lima/ppir: fix pointer referenced after a free

Issue detected by valgrind.

Fixes: 92d7ca4b1cd ("gallium: add lima driver")

Signed-off-by: Patrick Lerda <patrick9876 at free.fr>
Reviewed-by: Qiang Yu <yuq825 at gmail.com>

---

 src/gallium/drivers/lima/ir/pp/lower.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/lima/ir/pp/lower.c b/src/gallium/drivers/lima/ir/pp/lower.c
index e294f6740d1..97243dcfa3f 100644
--- a/src/gallium/drivers/lima/ir/pp/lower.c
+++ b/src/gallium/drivers/lima/ir/pp/lower.c
@@ -94,8 +94,9 @@ static bool ppir_lower_dot(ppir_block *block, ppir_node *node)
    dest->write_mask = u_bit_consecutive(0, num_components);
 
    ppir_node_foreach_pred_safe(node, dep) {
+      ppir_node *pred = dep->pred;
       ppir_node_remove_dep(dep);
-      ppir_node_add_dep(&mul->node, dep->pred);
+      ppir_node_add_dep(&mul->node, pred);
    }
    ppir_node_add_dep(node, &mul->node);