[PATCH vkd3d 3.5/5] vkd3d-shader: Consider previous last_read value when computing liveness.

[Matteo Bruni]

Otherwise we end up overwriting UINT_MAX last_read for output variables.

Signed-off-by: Matteo Bruni <mbruni at codeweavers.com>
---
 libs/vkd3d-shader/hlsl_codegen.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libs/vkd3d-shader/hlsl_codegen.c b/libs/vkd3d-shader/hlsl_codegen.c
index b6b9ded..b9f753a 100644
--- a/libs/vkd3d-shader/hlsl_codegen.c
+++ b/libs/vkd3d-shader/hlsl_codegen.c
@@ -355,7 +355,7 @@ static void compute_liveness_recurse(struct list *instrs, unsigned int loop_firs
             struct hlsl_ir_load *load = hlsl_ir_load(instr);
 
             var = load->src.var;
-            var->last_read = loop_last ? max(instr->index, loop_last) : instr->index;
+            var->last_read = max(var->last_read, loop_last ? max(instr->index, loop_last) : instr->index);
             if (load->src.offset.node)
                 load->src.offset.node->last_read = instr->index;
             break;
-- 
2.26.2