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// Copyright (c) 2020 Vasyl Teliman
//
// 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/fuzz/transformation_swap_conditional_branch_operands.h"
#include "gtest/gtest.h"
#include "source/fuzz/fuzzer_util.h"
#include "source/fuzz/instruction_descriptor.h"
#include "test/fuzz/fuzz_test_util.h"
namespace spvtools {
namespace fuzz {
namespace {
TEST(TransformationSwapConditionalBranchOperandsTest, BasicTest) {
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
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%9 = OpConstant %6 0
%11 = OpConstant %6 1
%14 = OpTypeBool
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
%10 = OpVariable %7 Function
OpStore %8 %9
OpStore %10 %11
%12 = OpLoad %6 %8
%13 = OpLoad %6 %10
%15 = OpSLessThan %14 %12 %13
OpSelectionMerge %17 None
OpBranchConditional %15 %16 %21 10 20
%16 = OpLabel
%18 = OpLoad %6 %10
%19 = OpLoad %6 %8
%20 = OpIAdd %6 %19 %18
OpBranch %17
%21 = OpLabel
%22 = OpLoad %6 %10
%23 = OpLoad %6 %8
%24 = OpISub %6 %23 %22
OpBranch %17
%17 = OpLabel
%25 = OpPhi %6 %20 %16 %24 %21
OpStore %8 %25
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto consumer = nullptr;
const auto context = BuildModule(env, consumer, shader, kFuzzAssembleOption);
spvtools::ValidatorOptions validator_options;
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
TransformationContext transformation_context(
MakeUnique<FactManager>(context.get()), validator_options);
// Invalid instruction descriptor.
ASSERT_FALSE(TransformationSwapConditionalBranchOperands(
MakeInstructionDescriptor(26, spv::Op::OpPhi, 0), 26)
.IsApplicable(context.get(), transformation_context));
// Descriptor for a wrong instruction.
ASSERT_FALSE(TransformationSwapConditionalBranchOperands(
MakeInstructionDescriptor(25, spv::Op::OpPhi, 0), 26)
.IsApplicable(context.get(), transformation_context));
// Fresh id is not fresh.
ASSERT_FALSE(
TransformationSwapConditionalBranchOperands(
MakeInstructionDescriptor(15, spv::Op::OpBranchConditional, 0), 25)
.IsApplicable(context.get(), transformation_context));
TransformationSwapConditionalBranchOperands transformation(
MakeInstructionDescriptor(15, spv::Op::OpBranchConditional, 0), 26);
ASSERT_EQ(nullptr, context->get_def_use_mgr()->GetDef(26));
ASSERT_EQ(nullptr, context->get_instr_block(26));
ASSERT_TRUE(
transformation.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation, context.get(), &transformation_context);
ASSERT_EQ(spv::Op::OpLogicalNot,
context->get_def_use_mgr()->GetDef(26)->opcode());
ASSERT_EQ(5, context->get_instr_block(26)->id());
ASSERT_EQ(1, context->get_def_use_mgr()->NumUses(26));
// Check that the def-use manager knows that the conditional branch operands
// have been swapped.
std::vector<std::pair<uint32_t, uint32_t>> phi_operand_to_new_operand_index =
{{16, 2}, {21, 1}};
for (std::pair<uint32_t, uint32_t>& entry :
phi_operand_to_new_operand_index) {
context->get_def_use_mgr()->WhileEachUse(
entry.first,
[&entry](opt::Instruction* inst, uint32_t operand_index) -> bool {
if (inst->opcode() == spv::Op::OpBranchConditional) {
EXPECT_EQ(entry.second, operand_index);
return false;
}
return true;
});
}
std::string after_transformation = 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
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%9 = OpConstant %6 0
%11 = OpConstant %6 1
%14 = OpTypeBool
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
%10 = OpVariable %7 Function
OpStore %8 %9
OpStore %10 %11
%12 = OpLoad %6 %8
%13 = OpLoad %6 %10
%15 = OpSLessThan %14 %12 %13
%26 = OpLogicalNot %14 %15
OpSelectionMerge %17 None
OpBranchConditional %26 %21 %16 20 10
%16 = OpLabel
%18 = OpLoad %6 %10
%19 = OpLoad %6 %8
%20 = OpIAdd %6 %19 %18
OpBranch %17
%21 = OpLabel
%22 = OpLoad %6 %10
%23 = OpLoad %6 %8
%24 = OpISub %6 %23 %22
OpBranch %17
%17 = OpLabel
%25 = OpPhi %6 %20 %16 %24 %21
OpStore %8 %25
OpReturn
OpFunctionEnd
)";
ASSERT_TRUE(IsEqual(env, after_transformation, context.get()));
}
} // namespace
} // namespace fuzz
} // namespace spvtools