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