[PATCH vkd3d 1/2] vkd3d-shader: Avoid multiple PrimitiveId declarations in hull shaders.

[Józef Kucia]

From: Józef Kucia

Signed-off-by: Józef Kucia 
---
 libs/vkd3d-shader/spirv.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/libs/vkd3d-shader/spirv.c b/libs/vkd3d-shader/spirv.c
index 73d266195f5d..ee409539ac42 100644
--- a/libs/vkd3d-shader/spirv.c
+++ b/libs/vkd3d-shader/spirv.c
@@ -4047,6 +4047,7 @@ static void vkd3d_dxbc_compiler_emit_input_register(struct vkd3d_dxbc_compiler *
     const struct vkd3d_shader_register *reg = &dst->reg;
     const struct vkd3d_spirv_builtin *builtin;
     struct vkd3d_symbol reg_symbol;
+    struct rb_entry *entry;
     uint32_t input_id;

assert(!reg->idx[0].rel_addr);
@@ -4059,9 +4060,13 @@ static void vkd3d_dxbc_compiler_emit_input_register(struct vkd3d_dxbc_compiler *
         return;
     }

+    /* vPrim may be declared in multiple hull shader phases. */
+    vkd3d_symbol_make_register(&reg_symbol, reg);
+    if ((entry = rb_get(&compiler->symbol_table, &reg_symbol)))
+        return;
+
     input_id = vkd3d_dxbc_compiler_emit_builtin_variable(compiler, builtin, SpvStorageClassInput, 0);

-    vkd3d_symbol_make_register(&reg_symbol, reg);
     vkd3d_symbol_set_register_info(&reg_symbol, input_id, SpvStorageClassInput,
             builtin->component_type, vkd3d_write_mask_from_component_count(builtin->component_count));
     reg_symbol.info.reg.is_aggregate = builtin->spirv_array_size;