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nir/spirv: Add support for builtins in arrays

This commit is contained in:
Jason Ekstrand 2015-10-22 17:58:20 -07:00
parent 9fe907ec79
commit ee8c67abe8
1 changed files with 31 additions and 2 deletions
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33
src/glsl/nir/spirv_to_nir.c
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@ -1387,12 +1387,41 @@ vtn_handle_variables(struct vtn_builder *b, SpvOp opcode,
/* If we encounter a builtin, we throw away the ress of the
* access chain, jump to the builtin, and keep building.
*/
const struct glsl_type *builtin_type = deref_type->type;
nir_deref_array *per_vertex_deref = NULL;
if (glsl_type_is_array(base->var->type)) {
/* This builtin is a per-vertex builtin */
assert(b->shader->stage == MESA_SHADER_GEOMETRY);
assert(base->var->data.mode == nir_var_shader_in);
builtin_type = glsl_array_type(builtin_type,
b->shader->info.gs.vertices_in);
/* The first non-var deref should be an array deref. */
assert(val->deref->deref.child->deref_type ==
nir_deref_type_array);
per_vertex_deref = nir_deref_as_array(val->deref->deref.child);
}
nir_variable *builtin = get_builtin_variable(b,
base->var->data.mode,
deref_type->type,
builtin_type,
deref_type->builtin);
val->deref = nir_deref_var_create(b, builtin);
tail = &val->deref->deref;
if (per_vertex_deref) {
/* Since deref chains start at the variable, we can just
* steal that link and use it.
*/
val->deref->deref.child = &per_vertex_deref->deref;
per_vertex_deref->deref.child = NULL;
per_vertex_deref->deref.type =
glsl_get_array_element(builtin_type);
tail = &per_vertex_deref->deref;
} else {
tail = &val->deref->deref;
}
} else {
tail = tail->child;
}