static bool
dead_cf_block(nir_block *block)
{
nir_if *following_if = nir_block_get_following_if(block);
if (following_if) {
nir_const_value *const_value =
nir_src_as_const_value(following_if->condition);
if (!const_value)
return false;
opt_constant_if(following_if, const_value->u[0] != 0);
return true;
}
nir_loop *following_loop = nir_block_get_following_loop(block);
if (!following_loop)
return false;
if (!loop_is_dead(following_loop))
return false;
nir_cf_node_remove(&following_loop->cf_node);
return true;
}
static bool
init_block(nir_block *block, struct exec_list *worklist)
{
nir_foreach_instr(instr, block)
init_instr(instr, worklist);
nir_if *following_if = nir_block_get_following_if(block);
if (following_if) {
if (following_if->condition.is_ssa &&
!following_if->condition.ssa->parent_instr->pass_flags)
worklist_push(worklist, following_if->condition.ssa->parent_instr);
}
return true;
}
}
continue;
}
default:
/* Everything else is an unknown non-boolean value and needs to
* have all sources resolved.
*/
instr->pass_flags = (instr->pass_flags & ~BRW_NIR_BOOLEAN_MASK) |
BRW_NIR_NON_BOOLEAN;
nir_foreach_src(instr, src_mark_needs_resolve, NULL);
continue;
}
}
nir_if *following_if = nir_block_get_following_if(block);
if (following_if)
src_mark_needs_resolve(&following_if->condition, NULL);
return true;
}
static void
analyze_boolean_resolves_impl(nir_function_impl *impl)
{
nir_foreach_block(impl, analyze_boolean_resolves_block, NULL);
}
void
brw_nir_analyze_boolean_resolves(nir_shader *shader)
{