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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_selection_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 {
TEST(RemoveSelectionTest, OpportunityBecauseSameTargetBlock) {
// A test with the following structure. The OpSelectionMerge instruction
// should be removed.
//
// header
// ||
// block
// |
// merge
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %2 "main"
OpExecutionMode %2 OriginUpperLeft
OpSource ESSL 310
OpName %2 "main"
%3 = OpTypeVoid
%4 = OpTypeFunction %3
%5 = OpTypeInt 32 1
%6 = OpTypePointer Function %5
%7 = OpTypeBool
%8 = OpConstantTrue %7
%2 = OpFunction %3 None %4
%9 = OpLabel
OpSelectionMerge %10 None
OpBranchConditional %8 %11 %11
%11 = OpLabel
OpBranch %10
%10 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto context = BuildModule(env, nullptr, shader, kReduceAssembleOption);
auto ops =
RemoveSelectionReductionOpportunityFinder().GetAvailableOpportunities(
context.get(), 0);
ASSERT_EQ(1, ops.size());
ASSERT_TRUE(ops[0]->PreconditionHolds());
ops[0]->TryToApply();
CheckValid(env, context.get());
std::string after = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %2 "main"
OpExecutionMode %2 OriginUpperLeft
OpSource ESSL 310
OpName %2 "main"
%3 = OpTypeVoid
%4 = OpTypeFunction %3
%5 = OpTypeInt 32 1
%6 = OpTypePointer Function %5
%7 = OpTypeBool
%8 = OpConstantTrue %7
%2 = OpFunction %3 None %4
%9 = OpLabel
OpBranchConditional %8 %11 %11
%11 = OpLabel
OpBranch %10
%10 = OpLabel
OpReturn
OpFunctionEnd
)";
CheckEqual(env, after, context.get());
ops = RemoveSelectionReductionOpportunityFinder().GetAvailableOpportunities(
context.get(), 0);
ASSERT_EQ(0, ops.size());
}
TEST(RemoveSelectionTest, OpportunityBecauseSameTargetBlockMerge) {
// A test with the following structure. The OpSelectionMerge instruction
// should be removed.
//
// header
// ||
// merge
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %2 "main"
OpExecutionMode %2 OriginUpperLeft
OpSource ESSL 310
OpName %2 "main"
%3 = OpTypeVoid
%4 = OpTypeFunction %3
%5 = OpTypeInt 32 1
%6 = OpTypePointer Function %5
%7 = OpTypeBool
%8 = OpConstantTrue %7
%2 = OpFunction %3 None %4
%9 = OpLabel
OpSelectionMerge %10 None
OpBranchConditional %8 %10 %10
%10 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto context = BuildModule(env, nullptr, shader, kReduceAssembleOption);
auto ops =
RemoveSelectionReductionOpportunityFinder().GetAvailableOpportunities(
context.get(), 0);
ASSERT_EQ(1, ops.size());
ASSERT_TRUE(ops[0]->PreconditionHolds());
ops[0]->TryToApply();
CheckValid(env, context.get());
std::string after = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %2 "main"
OpExecutionMode %2 OriginUpperLeft
OpSource ESSL 310
OpName %2 "main"
%3 = OpTypeVoid
%4 = OpTypeFunction %3
%5 = OpTypeInt 32 1
%6 = OpTypePointer Function %5
%7 = OpTypeBool
%8 = OpConstantTrue %7
%2 = OpFunction %3 None %4
%9 = OpLabel
OpBranchConditional %8 %10 %10
%10 = OpLabel
OpReturn
OpFunctionEnd
)";
CheckEqual(env, after, context.get());
ops = RemoveSelectionReductionOpportunityFinder().GetAvailableOpportunities(
context.get(), 0);
ASSERT_EQ(0, ops.size());
}
TEST(RemoveSelectionTest, NoOpportunityBecauseDifferentTargetBlocksOneMerge) {
// A test with the following structure. The OpSelectionMerge instruction
// should NOT be removed.
//
// header
// | |
// | block
// | |
// merge
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %2 "main"
OpExecutionMode %2 OriginUpperLeft
OpSource ESSL 310
OpName %2 "main"
%3 = OpTypeVoid
%4 = OpTypeFunction %3
%5 = OpTypeInt 32 1
%6 = OpTypePointer Function %5
%7 = OpTypeBool
%8 = OpConstantTrue %7
%2 = OpFunction %3 None %4
%9 = OpLabel
OpSelectionMerge %10 None
OpBranchConditional %8 %10 %11
%11 = OpLabel
OpBranch %10
%10 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto context = BuildModule(env, nullptr, shader, kReduceAssembleOption);
auto ops =
RemoveSelectionReductionOpportunityFinder().GetAvailableOpportunities(
context.get(), 0);
ASSERT_EQ(0, ops.size());
}
TEST(RemoveSelectionTest, NoOpportunityBecauseDifferentTargetBlocks) {
// A test with the following structure. The OpSelectionMerge instruction
// should NOT be removed.
//
// header
// | |
// b b
// | |
// merge
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %2 "main"
OpExecutionMode %2 OriginUpperLeft
OpSource ESSL 310
OpName %2 "main"
%3 = OpTypeVoid
%4 = OpTypeFunction %3
%5 = OpTypeInt 32 1
%6 = OpTypePointer Function %5
%7 = OpTypeBool
%8 = OpConstantTrue %7
%2 = OpFunction %3 None %4
%9 = OpLabel
OpSelectionMerge %10 None
OpBranchConditional %8 %11 %12
%11 = OpLabel
OpBranch %10
%12 = OpLabel
OpBranch %10
%10 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto context = BuildModule(env, nullptr, shader, kReduceAssembleOption);
auto ops =
RemoveSelectionReductionOpportunityFinder().GetAvailableOpportunities(
context.get(), 0);
ASSERT_EQ(0, ops.size());
}
TEST(RemoveSelectionTest, NoOpportunityBecauseMergeUsed) {
// A test with the following structure. The OpSelectionMerge instruction
// should NOT be removed.
//
// header
// ||
// block
// | |
// | block
// | |
// merge
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %2 "main"
OpExecutionMode %2 OriginUpperLeft
OpSource ESSL 310
OpName %2 "main"
%3 = OpTypeVoid
%4 = OpTypeFunction %3
%5 = OpTypeInt 32 1
%6 = OpTypePointer Function %5
%7 = OpTypeBool
%8 = OpConstantTrue %7
%2 = OpFunction %3 None %4
%9 = OpLabel
OpSelectionMerge %10 None
OpBranchConditional %8 %11 %12
%11 = OpLabel
OpBranchConditional %8 %10 %12
%12 = OpLabel
OpBranch %10
%10 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto context = BuildModule(env, nullptr, shader, kReduceAssembleOption);
auto ops =
RemoveSelectionReductionOpportunityFinder().GetAvailableOpportunities(
context.get(), 0);
ASSERT_EQ(0, ops.size());
}
TEST(RemoveSelectionTest, OpportunityBecauseLoopMergeUsed) {
// A test with the following structure. The OpSelectionMerge instruction
// should be removed.
//
// loop header
// |
// |
// s.header
// ||
// block
// | |
// | |
// | | ^ (to loop header)
// s.merge | |
// | / loop continue target (unreachable)
// loop merge
//
//
// which becomes:
//
// loop header
// |
// |
// block
// ||
// block
// | |
// | |
// | | ^ (to loop header)
// block | |
// | / loop continue target (unreachable)
// loop merge
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %2 "main"
OpExecutionMode %2 OriginUpperLeft
OpSource ESSL 310
OpName %2 "main"
%3 = OpTypeVoid
%4 = OpTypeFunction %3
%5 = OpTypeInt 32 1
%6 = OpTypePointer Function %5
%7 = OpTypeBool
%8 = OpConstantTrue %7
%2 = OpFunction %3 None %4
%9 = OpLabel
OpBranch %10
%10 = OpLabel
OpLoopMerge %11 %12 None
OpBranch %13
%13 = OpLabel
OpSelectionMerge %14 None
OpBranchConditional %8 %15 %15
%15 = OpLabel
OpBranchConditional %8 %14 %11
%14 = OpLabel
OpBranch %11
%12 = OpLabel
OpBranch %10
%11 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto context = BuildModule(env, nullptr, shader, kReduceAssembleOption);
CheckValid(env, context.get());
auto ops =
RemoveSelectionReductionOpportunityFinder().GetAvailableOpportunities(
context.get(), 0);
ASSERT_EQ(1, ops.size());
ASSERT_TRUE(ops[0]->PreconditionHolds());
ops[0]->TryToApply();
CheckValid(env, context.get());
std::string after = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %2 "main"
OpExecutionMode %2 OriginUpperLeft
OpSource ESSL 310
OpName %2 "main"
%3 = OpTypeVoid
%4 = OpTypeFunction %3
%5 = OpTypeInt 32 1
%6 = OpTypePointer Function %5
%7 = OpTypeBool
%8 = OpConstantTrue %7
%2 = OpFunction %3 None %4
%9 = OpLabel
OpBranch %10
%10 = OpLabel
OpLoopMerge %11 %12 None
OpBranch %13
%13 = OpLabel
OpBranchConditional %8 %15 %15
%15 = OpLabel
OpBranchConditional %8 %14 %11
%14 = OpLabel
OpBranch %11
%12 = OpLabel
OpBranch %10
%11 = OpLabel
OpReturn
OpFunctionEnd
)";
CheckEqual(env, after, context.get());
ops = RemoveSelectionReductionOpportunityFinder().GetAvailableOpportunities(
context.get(), 0);
ASSERT_EQ(0, ops.size());
}
TEST(RemoveSelectionTest, OpportunityBecauseLoopContinueUsed) {
// A test with the following structure. The OpSelectionMerge instruction
// should be removed.
//
// loop header
// |
// |
// s.header
// ||
// block
// | |
// | |
// | | ^ (to loop header)
// s.merge | |
// | loop continue target
// loop merge
//
//
// which becomes:
//
// loop header
// |
// |
// block
// ||
// block
// | |
// | |
// | | ^ (to loop header)
// block | |
// | loop continue target
// loop merge
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %2 "main"
OpExecutionMode %2 OriginUpperLeft
OpSource ESSL 310
OpName %2 "main"
%3 = OpTypeVoid
%4 = OpTypeFunction %3
%5 = OpTypeInt 32 1
%6 = OpTypePointer Function %5
%7 = OpTypeBool
%8 = OpConstantTrue %7
%2 = OpFunction %3 None %4
%9 = OpLabel
OpBranch %10
%10 = OpLabel
OpLoopMerge %11 %12 None
OpBranch %13
%13 = OpLabel
OpSelectionMerge %14 None
OpBranchConditional %8 %15 %15
%15 = OpLabel
OpBranchConditional %8 %14 %12
%14 = OpLabel
OpBranch %11
%12 = OpLabel
OpBranch %10
%11 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto context = BuildModule(env, nullptr, shader, kReduceAssembleOption);
CheckValid(env, context.get());
auto ops =
RemoveSelectionReductionOpportunityFinder().GetAvailableOpportunities(
context.get(), 0);
ASSERT_EQ(1, ops.size());
ASSERT_TRUE(ops[0]->PreconditionHolds());
ops[0]->TryToApply();
CheckValid(env, context.get());
std::string after = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %2 "main"
OpExecutionMode %2 OriginUpperLeft
OpSource ESSL 310
OpName %2 "main"
%3 = OpTypeVoid
%4 = OpTypeFunction %3
%5 = OpTypeInt 32 1
%6 = OpTypePointer Function %5
%7 = OpTypeBool
%8 = OpConstantTrue %7
%2 = OpFunction %3 None %4
%9 = OpLabel
OpBranch %10
%10 = OpLabel
OpLoopMerge %11 %12 None
OpBranch %13
%13 = OpLabel
OpBranchConditional %8 %15 %15
%15 = OpLabel
OpBranchConditional %8 %14 %12
%14 = OpLabel
OpBranch %11
%12 = OpLabel
OpBranch %10
%11 = OpLabel
OpReturn
OpFunctionEnd
)";
CheckEqual(env, after, context.get());
ops = RemoveSelectionReductionOpportunityFinder().GetAvailableOpportunities(
context.get(), 0);
ASSERT_EQ(0, ops.size());
}
} // namespace
} // namespace reduce
} // namespace spvtools