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// Copyright (c) 2019 Google LLC
//
// 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 "source/reduce/remove_function_reduction_opportunity_finder.h"
#include "source/opt/build_module.h"
#include "source/reduce/reduction_opportunity.h"
#include "test/reduce/reduce_test_util.h"
namespace spvtools {
namespace reduce {
namespace {
// Helper to count the number of functions in the module.
// Remove if there turns out to be a more direct way to do this.
uint32_t count_functions(opt::IRContext* context) {
uint32_t result = 0;
for (auto& function : *context->module()) {
(void)(function);
++result;
}
return result;
}
TEST(RemoveFunctionTest, BasicCheck) {
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%4 = OpFunction %2 None %3
%5 = OpLabel
OpReturn
OpFunctionEnd
%6 = OpFunction %2 None %3
%7 = OpLabel
OpReturn
OpFunctionEnd
%8 = OpFunction %2 None %3
%9 = OpLabel
%10 = OpFunctionCall %2 %6
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto consumer = nullptr;
const auto context =
BuildModule(env, consumer, shader, kReduceAssembleOption);
ASSERT_EQ(3, count_functions(context.get()));
auto ops =
RemoveFunctionReductionOpportunityFinder().GetAvailableOpportunities(
context.get(), 0);
ASSERT_EQ(1, ops.size());
ASSERT_TRUE(ops[0]->PreconditionHolds());
ops[0]->TryToApply();
ASSERT_EQ(2, count_functions(context.get()));
std::string after_first = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%4 = OpFunction %2 None %3
%5 = OpLabel
OpReturn
OpFunctionEnd
%6 = OpFunction %2 None %3
%7 = OpLabel
OpReturn
OpFunctionEnd
)";
CheckEqual(env, after_first, context.get());
ops = RemoveFunctionReductionOpportunityFinder().GetAvailableOpportunities(
context.get(), 0);
ASSERT_EQ(1, ops.size());
ASSERT_TRUE(ops[0]->PreconditionHolds());
ops[0]->TryToApply();
ASSERT_EQ(1, count_functions(context.get()));
std::string after_second = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%4 = OpFunction %2 None %3
%5 = OpLabel
OpReturn
OpFunctionEnd
)";
CheckEqual(env, after_second, context.get());
}
TEST(RemoveFunctionTest, NothingToRemove) {
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%4 = OpFunction %2 None %3
%5 = OpLabel
%11 = OpFunctionCall %2 %8
OpReturn
OpFunctionEnd
%6 = OpFunction %2 None %3
%7 = OpLabel
OpReturn
OpFunctionEnd
%8 = OpFunction %2 None %3
%9 = OpLabel
%10 = OpFunctionCall %2 %6
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto consumer = nullptr;
const auto context =
BuildModule(env, consumer, shader, kReduceAssembleOption);
auto ops =
RemoveFunctionReductionOpportunityFinder().GetAvailableOpportunities(
context.get(), 0);
ASSERT_EQ(0, ops.size());
}
TEST(RemoveFunctionTest, TwoRemovableFunctions) {
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%4 = OpFunction %2 None %3
%5 = OpLabel
OpReturn
OpFunctionEnd
%6 = OpFunction %2 None %3
%7 = OpLabel
OpReturn
OpFunctionEnd
%8 = OpFunction %2 None %3
%9 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto consumer = nullptr;
const auto context =
BuildModule(env, consumer, shader, kReduceAssembleOption);
ASSERT_EQ(3, count_functions(context.get()));
auto ops =
RemoveFunctionReductionOpportunityFinder().GetAvailableOpportunities(
context.get(), 0);
ASSERT_EQ(2, ops.size());
ASSERT_TRUE(ops[0]->PreconditionHolds());
ops[0]->TryToApply();
ASSERT_EQ(2, count_functions(context.get()));
ASSERT_TRUE(ops[1]->PreconditionHolds());
ops[1]->TryToApply();
ASSERT_EQ(1, count_functions(context.get()));
std::string after = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%4 = OpFunction %2 None %3
%5 = OpLabel
OpReturn
OpFunctionEnd
)";
CheckEqual(env, after, context.get());
}
TEST(RemoveFunctionTest, NoRemovalsDueToOpName) {
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
OpName %6 "foo("
OpName %8 "bar("
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%4 = OpFunction %2 None %3
%5 = OpLabel
OpReturn
OpFunctionEnd
%6 = OpFunction %2 None %3
%7 = OpLabel
OpReturn
OpFunctionEnd
%8 = OpFunction %2 None %3
%9 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto consumer = nullptr;
const auto context =
BuildModule(env, consumer, shader, kReduceAssembleOption);
auto ops =
RemoveFunctionReductionOpportunityFinder().GetAvailableOpportunities(
context.get(), 0);
ASSERT_EQ(0, ops.size());
}
TEST(RemoveFunctionTest, NoRemovalDueToLinkageDecoration) {
// The non-entry point function is not removable because it is referenced by a
// linkage decoration. Thus no function can be removed.
std::string shader = R"(
OpCapability Shader
OpCapability Linkage
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %1 "main"
OpName %1 "main"
OpDecorate %2 LinkageAttributes "ExportedFunc" Export
%4 = OpTypeVoid
%5 = OpTypeFunction %4
%1 = OpFunction %4 None %5
%6 = OpLabel
OpReturn
OpFunctionEnd
%2 = OpFunction %4 None %5
%7 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto consumer = nullptr;
const auto context =
BuildModule(env, consumer, shader, kReduceAssembleOption);
auto ops =
RemoveFunctionReductionOpportunityFinder().GetAvailableOpportunities(
context.get(), 0);
ASSERT_EQ(0, ops.size());
}
} // namespace
} // namespace reduce
} // namespace spvtools
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