Francisco Casas : vkd3d-shader/hlsl: Don't create semantic vars more than once.

[Alexandre Julliard]

Module: vkd3d
Branch: master
Commit: a488889494f524df56f99e366cc3bc5ffa1b6df9
URL:    https://gitlab.winehq.org/wine/vkd3d/-/commit/a488889494f524df56f99e366cc3bc...

Author: Francisco Casas 
Date:   Wed Apr  5 11:58:23 2023 -0400

vkd3d-shader/hlsl: Don't create semantic vars more than once.

---

libs/vkd3d-shader/hlsl_codegen.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/libs/vkd3d-shader/hlsl_codegen.c b/libs/vkd3d-shader/hlsl_codegen.c
index 314ef4ff..3ee20b2a 100644
--- a/libs/vkd3d-shader/hlsl_codegen.c
+++ b/libs/vkd3d-shader/hlsl_codegen.c
@@ -231,6 +231,16 @@ static struct hlsl_ir_var *add_semantic_var(struct hlsl_ctx *ctx, struct hlsl_ir
     if (!(name = hlsl_get_string_buffer(ctx)))
         return NULL;
     vkd3d_string_buffer_printf(name, "<%s-%s%u>", output ? "output" : "input", semantic->name, semantic->index);
+
+    LIST_FOR_EACH_ENTRY(ext_var, &ctx->extern_vars, struct hlsl_ir_var, extern_entry)
+    {
+        if (!ascii_strcasecmp(ext_var->name, name->buffer))
+        {
+            hlsl_release_string_buffer(ctx, name);
+            return ext_var;
+        }
+    }
+
     if (!(new_semantic.name = hlsl_strdup(ctx, semantic->name)))
     {
         hlsl_release_string_buffer(ctx, name);