mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-12-26 17:51:02 +00:00
439 lines
16 KiB
C++
439 lines
16 KiB
C++
// Copyright (c) 2017 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <algorithm>
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#include <cstdarg>
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#include <iostream>
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#include <sstream>
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#include <string>
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#include <unordered_set>
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#include <vector>
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#include "gmock/gmock.h"
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#include "test/opt/assembly_builder.h"
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#include "test/opt/pass_fixture.h"
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#include "test/opt/pass_utils.h"
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namespace spvtools {
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namespace opt {
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namespace {
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using ::testing::HasSubstr;
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using ::testing::MatchesRegex;
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using StrengthReductionBasicTest = PassTest<::testing::Test>;
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// Test to make sure we replace 5*8.
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TEST_F(StrengthReductionBasicTest, BasicReplaceMulBy8) {
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const std::vector<const char*> text = {
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// clang-format off
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"OpCapability Shader",
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"%1 = OpExtInstImport \"GLSL.std.450\"",
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"OpMemoryModel Logical GLSL450",
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"OpEntryPoint Vertex %main \"main\"",
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"OpName %main \"main\"",
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"%void = OpTypeVoid",
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"%4 = OpTypeFunction %void",
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"%uint = OpTypeInt 32 0",
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"%uint_5 = OpConstant %uint 5",
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"%uint_8 = OpConstant %uint 8",
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"%main = OpFunction %void None %4",
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"%8 = OpLabel",
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"%9 = OpIMul %uint %uint_5 %uint_8",
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"OpReturn",
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"OpFunctionEnd"
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// clang-format on
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};
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auto result = SinglePassRunAndDisassemble<StrengthReductionPass>(
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JoinAllInsts(text), /* skip_nop = */ true, /* do_validation = */ false);
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EXPECT_EQ(Pass::Status::SuccessWithChange, std::get<1>(result));
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const std::string& output = std::get<0>(result);
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EXPECT_THAT(output, Not(HasSubstr("OpIMul")));
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EXPECT_THAT(output, HasSubstr("OpShiftLeftLogical %uint %uint_5 %uint_3"));
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}
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// TODO(dneto): Add Effcee as required dependency, and make this unconditional.
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// Test to make sure we replace 16*5
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// Also demonstrate use of Effcee matching.
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TEST_F(StrengthReductionBasicTest, BasicReplaceMulBy16) {
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const std::string text = R"(
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OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Vertex %main "main"
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OpName %main "main"
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%void = OpTypeVoid
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%4 = OpTypeFunction %void
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; We know disassembly will produce %uint here, but
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; CHECK: %uint = OpTypeInt 32 0
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; CHECK-DAG: [[five:%[a-zA-Z_\d]+]] = OpConstant %uint 5
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; We have RE2 regular expressions, so \w matches [_a-zA-Z0-9].
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; This shows the preferred pattern for matching SPIR-V identifiers.
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; (We could have cheated in this case since we know the disassembler will
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; generate the 'nice' name of "%uint_4".
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; CHECK-DAG: [[four:%\w+]] = OpConstant %uint 4
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%uint = OpTypeInt 32 0
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%uint_5 = OpConstant %uint 5
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%uint_16 = OpConstant %uint 16
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%main = OpFunction %void None %4
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; CHECK: OpLabel
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%8 = OpLabel
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; CHECK-NEXT: OpShiftLeftLogical %uint [[five]] [[four]]
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; The multiplication disappears.
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; CHECK-NOT: OpIMul
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%9 = OpIMul %uint %uint_16 %uint_5
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OpReturn
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; CHECK: OpFunctionEnd
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OpFunctionEnd)";
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SinglePassRunAndMatch<StrengthReductionPass>(text, false);
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}
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// Test to make sure we replace a multiple of 32 and 4.
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TEST_F(StrengthReductionBasicTest, BasicTwoPowersOf2) {
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// In this case, we have two powers of 2. Need to make sure we replace only
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// one of them for the bit shift.
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// clang-format off
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const std::string text = R"(
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OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Vertex %main "main"
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OpName %main "main"
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%void = OpTypeVoid
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%4 = OpTypeFunction %void
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%int = OpTypeInt 32 1
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%int_32 = OpConstant %int 32
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%int_4 = OpConstant %int 4
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%main = OpFunction %void None %4
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%8 = OpLabel
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%9 = OpIMul %int %int_32 %int_4
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OpReturn
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OpFunctionEnd
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)";
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// clang-format on
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auto result = SinglePassRunAndDisassemble<StrengthReductionPass>(
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text, /* skip_nop = */ true, /* do_validation = */ false);
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EXPECT_EQ(Pass::Status::SuccessWithChange, std::get<1>(result));
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const std::string& output = std::get<0>(result);
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EXPECT_THAT(output, Not(HasSubstr("OpIMul")));
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EXPECT_THAT(output, HasSubstr("OpShiftLeftLogical %int %int_4 %uint_5"));
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}
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// Test to make sure we don't replace 0*5.
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TEST_F(StrengthReductionBasicTest, BasicDontReplace0) {
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const std::vector<const char*> text = {
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// clang-format off
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"OpCapability Shader",
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"%1 = OpExtInstImport \"GLSL.std.450\"",
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"OpMemoryModel Logical GLSL450",
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"OpEntryPoint Vertex %main \"main\"",
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"OpName %main \"main\"",
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"%void = OpTypeVoid",
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"%4 = OpTypeFunction %void",
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"%int = OpTypeInt 32 1",
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"%int_0 = OpConstant %int 0",
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"%int_5 = OpConstant %int 5",
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"%main = OpFunction %void None %4",
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"%8 = OpLabel",
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"%9 = OpIMul %int %int_0 %int_5",
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"OpReturn",
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"OpFunctionEnd"
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// clang-format on
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};
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auto result = SinglePassRunAndDisassemble<StrengthReductionPass>(
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JoinAllInsts(text), /* skip_nop = */ true, /* do_validation = */ false);
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EXPECT_EQ(Pass::Status::SuccessWithoutChange, std::get<1>(result));
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}
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// Test to make sure we do not replace a multiple of 5 and 7.
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TEST_F(StrengthReductionBasicTest, BasicNoChange) {
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const std::vector<const char*> text = {
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// clang-format off
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"OpCapability Shader",
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"%1 = OpExtInstImport \"GLSL.std.450\"",
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"OpMemoryModel Logical GLSL450",
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"OpEntryPoint Vertex %2 \"main\"",
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"OpName %2 \"main\"",
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"%3 = OpTypeVoid",
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"%4 = OpTypeFunction %3",
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"%5 = OpTypeInt 32 1",
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"%6 = OpTypeInt 32 0",
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"%7 = OpConstant %5 5",
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"%8 = OpConstant %5 7",
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"%2 = OpFunction %3 None %4",
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"%9 = OpLabel",
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"%10 = OpIMul %5 %7 %8",
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"OpReturn",
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"OpFunctionEnd",
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// clang-format on
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};
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auto result = SinglePassRunAndDisassemble<StrengthReductionPass>(
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JoinAllInsts(text), /* skip_nop = */ true, /* do_validation = */ false);
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EXPECT_EQ(Pass::Status::SuccessWithoutChange, std::get<1>(result));
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}
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// Test to make sure constants and types are reused and not duplicated.
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TEST_F(StrengthReductionBasicTest, NoDuplicateConstantsAndTypes) {
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const std::vector<const char*> text = {
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// clang-format off
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"OpCapability Shader",
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"%1 = OpExtInstImport \"GLSL.std.450\"",
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"OpMemoryModel Logical GLSL450",
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"OpEntryPoint Vertex %main \"main\"",
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"OpName %main \"main\"",
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"%void = OpTypeVoid",
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"%4 = OpTypeFunction %void",
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"%uint = OpTypeInt 32 0",
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"%uint_8 = OpConstant %uint 8",
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"%uint_3 = OpConstant %uint 3",
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"%main = OpFunction %void None %4",
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"%8 = OpLabel",
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"%9 = OpIMul %uint %uint_8 %uint_3",
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"OpReturn",
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"OpFunctionEnd",
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// clang-format on
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};
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auto result = SinglePassRunAndDisassemble<StrengthReductionPass>(
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JoinAllInsts(text), /* skip_nop = */ true, /* do_validation = */ false);
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EXPECT_EQ(Pass::Status::SuccessWithChange, std::get<1>(result));
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const std::string& output = std::get<0>(result);
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EXPECT_THAT(output,
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Not(MatchesRegex(".*OpConstant %uint 3.*OpConstant %uint 3.*")));
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EXPECT_THAT(output, Not(MatchesRegex(".*OpTypeInt 32 0.*OpTypeInt 32 0.*")));
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}
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// Test to make sure we generate the constants only once
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TEST_F(StrengthReductionBasicTest, BasicCreateOneConst) {
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const std::vector<const char*> text = {
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// clang-format off
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"OpCapability Shader",
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"%1 = OpExtInstImport \"GLSL.std.450\"",
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"OpMemoryModel Logical GLSL450",
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"OpEntryPoint Vertex %main \"main\"",
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"OpName %main \"main\"",
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"%void = OpTypeVoid",
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"%4 = OpTypeFunction %void",
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"%uint = OpTypeInt 32 0",
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"%uint_5 = OpConstant %uint 5",
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"%uint_9 = OpConstant %uint 9",
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"%uint_128 = OpConstant %uint 128",
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"%main = OpFunction %void None %4",
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"%8 = OpLabel",
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"%9 = OpIMul %uint %uint_5 %uint_128",
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"%10 = OpIMul %uint %uint_9 %uint_128",
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"OpReturn",
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"OpFunctionEnd"
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// clang-format on
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};
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auto result = SinglePassRunAndDisassemble<StrengthReductionPass>(
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JoinAllInsts(text), /* skip_nop = */ true, /* do_validation = */ false);
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EXPECT_EQ(Pass::Status::SuccessWithChange, std::get<1>(result));
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const std::string& output = std::get<0>(result);
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EXPECT_THAT(output, Not(HasSubstr("OpIMul")));
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EXPECT_THAT(output, HasSubstr("OpShiftLeftLogical %uint %uint_5 %uint_7"));
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EXPECT_THAT(output, HasSubstr("OpShiftLeftLogical %uint %uint_9 %uint_7"));
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}
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// Test to make sure we generate the instructions in the correct position and
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// that the uses get replaced as well. Here we check that the use in the return
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// is replaced, we also check that we can replace two OpIMuls when one feeds the
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// other.
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TEST_F(StrengthReductionBasicTest, BasicCheckPositionAndReplacement) {
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// This is just the preamble to set up the test.
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const std::vector<const char*> common_text = {
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// clang-format off
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"OpCapability Shader",
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"%1 = OpExtInstImport \"GLSL.std.450\"",
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"OpMemoryModel Logical GLSL450",
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"OpEntryPoint Fragment %main \"main\" %gl_FragColor",
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"OpExecutionMode %main OriginUpperLeft",
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"OpName %main \"main\"",
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"OpName %foo_i1_ \"foo(i1;\"",
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"OpName %n \"n\"",
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"OpName %gl_FragColor \"gl_FragColor\"",
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"OpName %param \"param\"",
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"OpDecorate %gl_FragColor Location 0",
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"%void = OpTypeVoid",
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"%3 = OpTypeFunction %void",
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"%int = OpTypeInt 32 1",
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"%_ptr_Function_int = OpTypePointer Function %int",
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"%8 = OpTypeFunction %int %_ptr_Function_int",
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"%int_256 = OpConstant %int 256",
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"%int_2 = OpConstant %int 2",
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"%float = OpTypeFloat 32",
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"%v4float = OpTypeVector %float 4",
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"%_ptr_Output_v4float = OpTypePointer Output %v4float",
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"%gl_FragColor = OpVariable %_ptr_Output_v4float Output",
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"%float_1 = OpConstant %float 1",
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"%int_10 = OpConstant %int 10",
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"%float_0_375 = OpConstant %float 0.375",
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"%float_0_75 = OpConstant %float 0.75",
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"%uint = OpTypeInt 32 0",
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"%uint_8 = OpConstant %uint 8",
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"%uint_1 = OpConstant %uint 1",
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"%main = OpFunction %void None %3",
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"%5 = OpLabel",
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"%param = OpVariable %_ptr_Function_int Function",
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"OpStore %param %int_10",
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"%26 = OpFunctionCall %int %foo_i1_ %param",
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"%27 = OpConvertSToF %float %26",
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"%28 = OpFDiv %float %float_1 %27",
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"%31 = OpCompositeConstruct %v4float %28 %float_0_375 %float_0_75 %float_1",
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"OpStore %gl_FragColor %31",
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"OpReturn",
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"OpFunctionEnd"
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// clang-format on
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};
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// This is the real test. The two OpIMul should be replaced. The expected
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// output is in |foo_after|.
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const std::vector<const char*> foo_before = {
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// clang-format off
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"%foo_i1_ = OpFunction %int None %8",
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"%n = OpFunctionParameter %_ptr_Function_int",
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"%11 = OpLabel",
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"%12 = OpLoad %int %n",
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"%14 = OpIMul %int %12 %int_256",
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"%16 = OpIMul %int %14 %int_2",
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"OpReturnValue %16",
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"OpFunctionEnd",
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// clang-format on
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};
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const std::vector<const char*> foo_after = {
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// clang-format off
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"%foo_i1_ = OpFunction %int None %8",
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"%n = OpFunctionParameter %_ptr_Function_int",
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"%11 = OpLabel",
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"%12 = OpLoad %int %n",
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"%33 = OpShiftLeftLogical %int %12 %uint_8",
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"%34 = OpShiftLeftLogical %int %33 %uint_1",
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"OpReturnValue %34",
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"OpFunctionEnd",
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// clang-format on
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};
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SetAssembleOptions(SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
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SinglePassRunAndCheck<StrengthReductionPass>(
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JoinAllInsts(Concat(common_text, foo_before)),
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JoinAllInsts(Concat(common_text, foo_after)),
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/* skip_nop = */ true, /* do_validate = */ true);
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}
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// Test that, when the result of an OpIMul instruction has more than 1 use, and
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// the instruction is replaced, all of the uses of the results are replace with
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// the new result.
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TEST_F(StrengthReductionBasicTest, BasicTestMultipleReplacements) {
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// This is just the preamble to set up the test.
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const std::vector<const char*> common_text = {
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// clang-format off
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"OpCapability Shader",
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"%1 = OpExtInstImport \"GLSL.std.450\"",
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"OpMemoryModel Logical GLSL450",
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"OpEntryPoint Fragment %main \"main\" %gl_FragColor",
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"OpExecutionMode %main OriginUpperLeft",
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"OpName %main \"main\"",
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"OpName %foo_i1_ \"foo(i1;\"",
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"OpName %n \"n\"",
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"OpName %gl_FragColor \"gl_FragColor\"",
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"OpName %param \"param\"",
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"OpDecorate %gl_FragColor Location 0",
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"%void = OpTypeVoid",
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"%3 = OpTypeFunction %void",
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"%int = OpTypeInt 32 1",
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"%_ptr_Function_int = OpTypePointer Function %int",
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"%8 = OpTypeFunction %int %_ptr_Function_int",
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"%int_256 = OpConstant %int 256",
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"%int_2 = OpConstant %int 2",
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"%float = OpTypeFloat 32",
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"%v4float = OpTypeVector %float 4",
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"%_ptr_Output_v4float = OpTypePointer Output %v4float",
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"%gl_FragColor = OpVariable %_ptr_Output_v4float Output",
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"%float_1 = OpConstant %float 1",
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"%int_10 = OpConstant %int 10",
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"%float_0_375 = OpConstant %float 0.375",
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"%float_0_75 = OpConstant %float 0.75",
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"%uint = OpTypeInt 32 0",
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"%uint_8 = OpConstant %uint 8",
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"%uint_1 = OpConstant %uint 1",
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"%main = OpFunction %void None %3",
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"%5 = OpLabel",
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"%param = OpVariable %_ptr_Function_int Function",
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"OpStore %param %int_10",
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"%26 = OpFunctionCall %int %foo_i1_ %param",
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"%27 = OpConvertSToF %float %26",
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"%28 = OpFDiv %float %float_1 %27",
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"%31 = OpCompositeConstruct %v4float %28 %float_0_375 %float_0_75 %float_1",
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"OpStore %gl_FragColor %31",
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"OpReturn",
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"OpFunctionEnd"
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// clang-format on
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};
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// This is the real test. The two OpIMul instructions should be replaced. In
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// particular, we want to be sure that both uses of %16 are changed to use the
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// new result.
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const std::vector<const char*> foo_before = {
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// clang-format off
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"%foo_i1_ = OpFunction %int None %8",
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"%n = OpFunctionParameter %_ptr_Function_int",
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"%11 = OpLabel",
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"%12 = OpLoad %int %n",
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"%14 = OpIMul %int %12 %int_256",
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"%16 = OpIMul %int %14 %int_2",
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"%17 = OpIAdd %int %14 %16",
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"OpReturnValue %17",
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"OpFunctionEnd",
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// clang-format on
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};
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const std::vector<const char*> foo_after = {
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// clang-format off
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"%foo_i1_ = OpFunction %int None %8",
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"%n = OpFunctionParameter %_ptr_Function_int",
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"%11 = OpLabel",
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"%12 = OpLoad %int %n",
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"%34 = OpShiftLeftLogical %int %12 %uint_8",
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"%35 = OpShiftLeftLogical %int %34 %uint_1",
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"%17 = OpIAdd %int %34 %35",
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"OpReturnValue %17",
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"OpFunctionEnd",
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// clang-format on
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};
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SetAssembleOptions(SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
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SinglePassRunAndCheck<StrengthReductionPass>(
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JoinAllInsts(Concat(common_text, foo_before)),
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JoinAllInsts(Concat(common_text, foo_after)),
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/* skip_nop = */ true, /* do_validate = */ true);
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}
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} // namespace
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} // namespace opt
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} // namespace spvtools
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