176 lines
4.9 KiB
C++
176 lines
4.9 KiB
C++
/*
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* Copyright © 2018 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <gtest/gtest.h>
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#include "brw_vec4.h"
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#include "program/program.h"
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using namespace brw;
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class dead_code_eliminate_vec4_test : public ::testing::Test {
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virtual void SetUp();
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virtual void TearDown();
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public:
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struct brw_compiler *compiler;
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struct intel_device_info *devinfo;
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void *ctx;
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struct gl_shader_program *shader_prog;
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struct brw_vue_prog_data *prog_data;
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vec4_visitor *v;
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};
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class dead_code_eliminate_vec4_visitor : public vec4_visitor
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{
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public:
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dead_code_eliminate_vec4_visitor(struct brw_compiler *compiler,
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void *mem_ctx,
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nir_shader *shader,
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struct brw_vue_prog_data *prog_data)
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: vec4_visitor(compiler, NULL, NULL, prog_data, shader, mem_ctx,
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false /* no_spills */, false)
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{
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prog_data->dispatch_mode = DISPATCH_MODE_4X2_DUAL_OBJECT;
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}
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protected:
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virtual dst_reg *make_reg_for_system_value(int /* location */)
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{
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unreachable("Not reached");
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}
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virtual void setup_payload()
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{
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unreachable("Not reached");
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}
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virtual void emit_prolog()
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{
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unreachable("Not reached");
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}
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virtual void emit_thread_end()
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{
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unreachable("Not reached");
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}
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virtual void emit_urb_write_header(int /* mrf */)
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{
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unreachable("Not reached");
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}
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virtual vec4_instruction *emit_urb_write_opcode(bool /* complete */)
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{
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unreachable("Not reached");
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}
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};
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void dead_code_eliminate_vec4_test::SetUp()
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{
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ctx = ralloc_context(NULL);
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compiler = rzalloc(ctx, struct brw_compiler);
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devinfo = rzalloc(ctx, struct intel_device_info);
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compiler->devinfo = devinfo;
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prog_data = ralloc(ctx, struct brw_vue_prog_data);
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nir_shader *shader =
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nir_shader_create(ctx, MESA_SHADER_VERTEX, NULL, NULL);
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v = new dead_code_eliminate_vec4_visitor(compiler, ctx, shader, prog_data);
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devinfo->ver = 4;
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devinfo->verx10 = devinfo->ver * 10;
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}
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void dead_code_eliminate_vec4_test::TearDown()
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{
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delete v;
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v = NULL;
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ralloc_free(ctx);
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ctx = NULL;
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}
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static void
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dead_code_eliminate(vec4_visitor *v)
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{
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const bool print = getenv("TEST_DEBUG");
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if (print) {
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fprintf(stderr, "instructions before:\n");
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v->dump_instructions();
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}
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v->calculate_cfg();
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v->dead_code_eliminate();
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if (print) {
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fprintf(stderr, "instructions after:\n");
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v->dump_instructions();
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}
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}
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TEST_F(dead_code_eliminate_vec4_test, some_dead_channels_all_flags_used)
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{
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const vec4_builder bld = vec4_builder(v).at_end();
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src_reg r1 = src_reg(v, glsl_type::vec4_type);
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src_reg r2 = src_reg(v, glsl_type::vec4_type);
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src_reg r3 = src_reg(v, glsl_type::vec4_type);
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src_reg r4 = src_reg(v, glsl_type::vec4_type);
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src_reg r5 = src_reg(v, glsl_type::vec4_type);
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src_reg r6 = src_reg(v, glsl_type::vec4_type);
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/* Sequence like the following should not be modified by DCE.
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*
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* cmp.l.f0(8) g4<1>F g2<4,4,1>.wF g1<4,4,1>.xF
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* mov(8) g5<1>.xF g4<4,4,1>.xF
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* (+f0.x) sel(8) g6<1>UD g3<4>UD g6<4>UD
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*/
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vec4_instruction *test_cmp =
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bld.CMP(dst_reg(r4), r2, r1, BRW_CONDITIONAL_L);
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test_cmp->src[0].swizzle = BRW_SWIZZLE_WWWW;
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test_cmp->src[1].swizzle = BRW_SWIZZLE_XXXX;
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vec4_instruction *test_mov =
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bld.MOV(dst_reg(r5), r4);
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test_mov->dst.writemask = WRITEMASK_X;
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test_mov->src[0].swizzle = BRW_SWIZZLE_XXXX;
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vec4_instruction *test_sel =
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bld.SEL(dst_reg(r6), r3, r6);
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set_predicate(BRW_PREDICATE_NORMAL, test_sel);
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/* The scratch write is here just to make r5 and r6 be live so that the
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* whole program doesn't get eliminated by DCE.
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*/
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v->emit(v->SCRATCH_WRITE(dst_reg(r4), r6, r5));
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dead_code_eliminate(v);
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EXPECT_EQ(test_cmp->dst.writemask, WRITEMASK_XYZW);
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}
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