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spirv: Add a MESA_SPIRV_FORCE_UNSTRUCTURED environment variable

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Reviewed-by: Karol Herbst <kherbst@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/2401>
This commit is contained in:
Jason Ekstrand
2020-08-13 11:48:02 -05:00
committed by Marge Bot
parent 217def3ac6
commit b41e74ae4a
1 changed files with 7 additions and 1 deletions
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src/compiler/spirv/vtn_cfg.c
+7 -1
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@@ -1329,6 +1329,12 @@ void
vtn_function_emit(struct vtn_builder *b, struct vtn_function *func,
vtn_instruction_handler instruction_handler)
{
static int force_unstructured = -1;
if (force_unstructured < 0) {
force_unstructured =
env_var_as_boolean("MESA_SPIRV_FORCE_UNSTRUCTURED", false);
}
nir_builder_init(&b->nb, func->impl);
b->func = func;
b->nb.cursor = nir_after_cf_list(&func->impl->body);
@@ -1336,7 +1342,7 @@ vtn_function_emit(struct vtn_builder *b, struct vtn_function *func,
b->has_loop_continue = false;
b->phi_table = _mesa_pointer_hash_table_create(b);
if (b->shader->info.stage == MESA_SHADER_KERNEL) {
if (b->shader->info.stage == MESA_SHADER_KERNEL || force_unstructured) {
b->func->impl->structured = false;
vtn_emit_cf_func_unstructured(b, func, instruction_handler);
} else {