+++ /dev/null
-/*
- * Copyright © 2020 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- */
-#include <gtest/gtest.h>
-#include "nir.h"
-#include "nir_builder.h"
-
-class nir_opt_lower_returns_test : public ::testing::Test {
-protected:
- nir_opt_lower_returns_test();
- ~nir_opt_lower_returns_test();
-
- nir_builder bld;
-
- nir_ssa_def *in_def;
-};
-
-nir_opt_lower_returns_test::nir_opt_lower_returns_test()
-{
- glsl_type_singleton_init_or_ref();
-
- static const nir_shader_compiler_options options = { };
- bld = nir_builder_init_simple_shader(MESA_SHADER_VERTEX, &options, "lower returns test");
-
- nir_variable *var = nir_variable_create(bld.shader, nir_var_shader_in, glsl_int_type(), "in");
- in_def = nir_load_var(&bld, var);
-}
-
-nir_opt_lower_returns_test::~nir_opt_lower_returns_test()
-{
- ralloc_free(bld.shader);
- glsl_type_singleton_decref();
-}
-
-nir_phi_instr *create_one_source_phi(nir_shader *shader, nir_block *pred,
- nir_ssa_def *def)
-{
- nir_phi_instr *phi = nir_phi_instr_create(shader);
-
- nir_phi_instr_add_src(phi, pred, nir_src_for_ssa(def));
-
- nir_ssa_dest_init(&phi->instr, &phi->dest, def->num_components,
- def->bit_size);
-
- return phi;
-}
-
-TEST_F(nir_opt_lower_returns_test, phis_after_loop)
-{
- /* Test that after lowering of "return" the phis in block_5
- * have two sources, because block_2 will have block_5
- * as a successor.
- *
- * block block_0:
- * loop {
- * block block_1:
- * if ssa_2 {
- * block block_2:
- * return
- * // succs: block_6
- * } else {
- * block block_3:
- * break;
- * // succs: block_5
- * }
- * block block_4:
- * }
- * block block_5:
- * // preds: block_3
- * vec1 32 ssa_4 = phi block_3: ssa_1
- * vec1 32 ssa_5 = phi block_3: ssa_1
- * // succs: block_6
- * block block_6:
- */
-
- nir_loop *loop = nir_push_loop(&bld);
-
- nir_ssa_def *one = nir_imm_int(&bld, 1);
-
- nir_ssa_def *cmp_result = nir_ieq(&bld, in_def, one);
- nir_if *nif = nir_push_if(&bld, cmp_result);
-
- nir_jump(&bld, nir_jump_return);
-
- nir_push_else(&bld, NULL);
-
- nir_jump(&bld, nir_jump_break);
-
- nir_pop_if(&bld, NULL);
-
- nir_block *else_block = nir_if_last_else_block(nif);
-
- nir_pop_loop(&bld, loop);
-
- bld.cursor = nir_after_cf_node_and_phis(&loop->cf_node);
-
- nir_phi_instr *const phi_1 =
- create_one_source_phi(bld.shader, else_block, one);
- nir_builder_instr_insert(&bld, &phi_1->instr);
-
- nir_phi_instr *const phi_2 =
- create_one_source_phi(bld.shader, else_block, one);
- nir_builder_instr_insert(&bld, &phi_2->instr);
-
- ASSERT_TRUE(nir_lower_returns(bld.shader));
- EXPECT_EQ(phi_1->srcs.length(), 2);
- EXPECT_EQ(phi_2->srcs.length(), 2);
-
- nir_validate_shader(bld.shader, NULL);
-}
-
-TEST_F(nir_opt_lower_returns_test, phis_after_outer_loop)
-{
- /* Test that after lowering of "return" the phis in block_7
- * have two sources, because block_6 will have a conditional break
- * inserted, which will add a new predcessor to block_7.
- *
- * block block_0:
- * loop {
- * block block_1:
- * loop {
- * block block_2:
- * if ssa_2 {
- * block block_3:
- * return
- * // succs: block_8
- * } else {
- * block block_4:
- * break;
- * // succs: block_6
- * }
- * block block_5:
- * }
- * block block_6:
- * break;
- * // succs: block_7
- * }
- * block block_7:
- * // preds: block_6
- * vec1 32 ssa_4 = phi block_6: ssa_1
- * vec1 32 ssa_5 = phi block_6: ssa_1
- * // succs: block_8
- * block block_8:
- */
-
- nir_loop *loop_outer = nir_push_loop(&bld);
-
- bld.cursor = nir_after_cf_list(&loop_outer->body);
-
- nir_loop *loop_inner = nir_push_loop(&bld);
-
- bld.cursor = nir_after_cf_list(&loop_inner->body);
-
- nir_ssa_def *one = nir_imm_int(&bld, 1);
-
- nir_ssa_def *cmp_result = nir_ieq(&bld, in_def, one);
- nir_push_if(&bld, cmp_result);
-
- nir_jump(&bld, nir_jump_return);
-
- nir_push_else(&bld, NULL);
-
- nir_jump(&bld, nir_jump_break);
-
- nir_pop_if(&bld, NULL);
-
- nir_pop_loop(&bld, loop_inner);
-
- bld.cursor = nir_after_cf_node_and_phis(&loop_inner->cf_node);
-
- nir_jump(&bld, nir_jump_break);
-
- nir_pop_loop(&bld, loop_outer);
-
- bld.cursor = nir_after_cf_node_and_phis(&loop_outer->cf_node);
-
- nir_phi_instr *const phi_1 =
- create_one_source_phi(bld.shader, nir_loop_last_block(loop_outer), one);
- nir_builder_instr_insert(&bld, &phi_1->instr);
-
- nir_phi_instr *const phi_2 =
- create_one_source_phi(bld.shader, nir_loop_last_block(loop_outer), one);
- nir_builder_instr_insert(&bld, &phi_2->instr);
-
- ASSERT_TRUE(nir_lower_returns(bld.shader));
- EXPECT_EQ(phi_1->srcs.length(), 2);
- EXPECT_EQ(phi_2->srcs.length(), 2);
-
- nir_validate_shader(bld.shader, NULL);
-}
projects / platform / upstream / mesa.git / commitdiff