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brw: Add a few basic tests for register coalesce

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Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34253>
This commit is contained in:
Caio Oliveira 2025-03-27 19:48:13 -07:00 • committed by Marge Bot
parent 22c399320b
commit cfc4067b0e
2 changed files with 87 additions and 0 deletions
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1
src/intel/compiler/meson.build
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@ -218,6 +218,7 @@ if with_tests
'test_opt_combine_constants.cpp',
'test_opt_copy_propagation.cpp',
'test_opt_cse.cpp',
'test_opt_register_coalesce.cpp',
'test_opt_saturate_propagation.cpp',
'test_simd_selection.cpp',
'test_vf_float_conversions.cpp',

86
src/intel/compiler/test_opt_register_coalesce.cpp Normal file
View file

@ -0,0 +1,86 @@
/*
* Copyright © 2025 Intel Corporation
* SPDX-License-Identifier: MIT
*/
#include "test_helpers.h"
#include "brw_builder.h"
class RegisterCoalesceTest : public brw_shader_pass_test {};
TEST_F(RegisterCoalesceTest, BasicMov)
{
brw_builder bld = make_shader();
brw_builder exp = make_shader();
brw_reg a = vgrf(bld, exp, BRW_TYPE_F);
brw_reg b = vgrf(bld, exp, BRW_TYPE_F);
brw_reg c = vgrf(bld, exp, BRW_TYPE_F);
brw_reg i = brw_imm_f(42.0);
brw_reg x = vgrf(bld, exp, BRW_TYPE_F);
brw_reg y = vgrf(bld, exp, BRW_TYPE_F);
bld.ADD(x, a, b);
bld.MOV(y, x);
bld.MUL(c, y, i);
EXPECT_PROGRESS(brw_opt_register_coalesce, bld);
exp.ADD(x, a, b);
exp.MUL(c, x, i);
EXPECT_SHADERS_MATCH(bld, exp);
}
TEST_F(RegisterCoalesceTest, RegistersInterfere)
{
brw_builder bld = make_shader();
brw_reg a = vgrf(bld, BRW_TYPE_F);
brw_reg b = vgrf(bld, BRW_TYPE_F);
brw_reg c = vgrf(bld, BRW_TYPE_F);
brw_reg d = vgrf(bld, BRW_TYPE_F);
brw_reg i = brw_imm_f(42.0);
brw_reg x = vgrf(bld, BRW_TYPE_F);
brw_reg y = vgrf(bld, BRW_TYPE_F);
bld.ADD(x, a, b);
bld.MOV(y, x);
bld.ADD(x, x, x);
bld.MUL(c, y, i);
bld.ADD(d, y, y);
EXPECT_NO_PROGRESS(brw_opt_register_coalesce, bld);
}
TEST_F(RegisterCoalesceTest, InterfereButContainEachOther)
{
brw_builder bld = make_shader();
brw_builder exp = make_shader();
brw_reg a = vgrf(bld, exp, BRW_TYPE_F);
brw_reg b = vgrf(bld, exp, BRW_TYPE_F);
brw_reg c = vgrf(bld, exp, BRW_TYPE_F);
brw_reg d = vgrf(bld, exp, BRW_TYPE_F);
brw_reg e = vgrf(bld, exp, BRW_TYPE_F);
brw_reg x = vgrf(bld, exp, BRW_TYPE_F);
brw_reg y = vgrf(bld, exp, BRW_TYPE_F);
bld.MUL(x, a, b);
bld.ADD(c, x, x);
bld.ADD(d, x, x);
bld.MOV(y, x);
bld.ADD(e, x, y);
EXPECT_PROGRESS(brw_opt_register_coalesce, bld);
exp.MUL(x, a, b);
exp.ADD(c, x, x);
exp.ADD(d, x, x);
exp.ADD(e, x, x);
EXPECT_SHADERS_MATCH(bld, exp);
}