[PATCH 1/1] vkd3d-shader/d3dbc: Do not write semantic declarations for unused variables.

[Nikolay Sivov]

From: Nikolay Sivov

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=55829
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=56402
Signed-off-by: Nikolay Sivov 
---
 libs/vkd3d-shader/d3dbc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libs/vkd3d-shader/d3dbc.c b/libs/vkd3d-shader/d3dbc.c
index a8cca17fa..4cf1f37c4 100644
--- a/libs/vkd3d-shader/d3dbc.c
+++ b/libs/vkd3d-shader/d3dbc.c
@@ -2067,6 +2067,9 @@ static void write_sm1_semantic_dcl(struct hlsl_ctx *ctx, struct vkd3d_bytecode_b
     D3DDECLUSAGE usage;
     bool ret;

+    if ((!output && !var->last_read) || (output && !var->first_write))
+        return;
+
     if (hlsl_sm1_register_from_semantic(ctx, &var->semantic, output, &reg.type, &reg.reg))
     {
         usage = 0;