// Copyright (c) 2018 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 "reduce_test_util.h"
#include "source/reduce/operand_to_const_reduction_pass.h"
#include "source/reduce/reducer.h"
#include "source/reduce/remove_opname_instruction_reduction_pass.h"
#include "source/reduce/remove_unreferenced_instruction_reduction_pass.h"
namespace spvtools {
namespace reduce {
namespace {
// This changes its mind each time IsInteresting is invoked as to whether the
// binary is interesting, until some limit is reached after which the binary is
// always deemed interesting. This is useful to test that reduction passes
// interleave in interesting ways for a while, and then always succeed after
// some point; the latter is important to end up with a predictable final
// reduced binary for tests.
class PingPongInteresting {
public:
explicit PingPongInteresting(uint32_t always_interesting_after)
: is_interesting_(true),
always_interesting_after_(always_interesting_after),
count_(0) {}
bool IsInteresting(const std::vector<uint32_t>&) {
bool result;
if (count_ > always_interesting_after_) {
result = true;
} else {
result = is_interesting_;
is_interesting_ = !is_interesting_;
}
count_++;
return result;
}
private:
bool is_interesting_;
const uint32_t always_interesting_after_;
uint32_t count_;
};
TEST(ReducerTest, ExprToConstantAndRemoveUnreferenced) {
std::string original = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main" %60
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
OpName %16 "buf2"
OpMemberName %16 0 "i"
OpName %18 ""
OpName %25 "buf1"
OpMemberName %25 0 "f"
OpName %27 ""
OpName %60 "_GLF_color"
OpMemberDecorate %16 0 Offset 0
OpDecorate %16 Block
OpDecorate %18 DescriptorSet 0
OpDecorate %18 Binding 2
OpMemberDecorate %25 0 Offset 0
OpDecorate %25 Block
OpDecorate %27 DescriptorSet 0
OpDecorate %27 Binding 1
OpDecorate %60 Location 0
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%9 = OpConstant %6 0
%16 = OpTypeStruct %6
%17 = OpTypePointer Uniform %16
%18 = OpVariable %17 Uniform
%19 = OpTypePointer Uniform %6
%22 = OpTypeBool
%100 = OpConstantTrue %22
%24 = OpTypeFloat 32
%25 = OpTypeStruct %24
%26 = OpTypePointer Uniform %25
%27 = OpVariable %26 Uniform
%28 = OpTypePointer Uniform %24
%31 = OpConstant %24 2
%56 = OpConstant %6 1
%58 = OpTypeVector %24 4
%59 = OpTypePointer Output %58
%60 = OpVariable %59 Output
%72 = OpUndef %24
%74 = OpUndef %6
%4 = OpFunction %2 None %3
%5 = OpLabel
OpBranch %10
%10 = OpLabel
%73 = OpPhi %6 %74 %5 %77 %34
%71 = OpPhi %24 %72 %5 %76 %34
%70 = OpPhi %6 %9 %5 %57 %34
%20 = OpAccessChain %19 %18 %9
%21 = OpLoad %6 %20
%23 = OpSLessThan %22 %70 %21
OpLoopMerge %12 %34 None
OpBranchConditional %23 %11 %12
%11 = OpLabel
%29 = OpAccessChain %28 %27 %9
%30 = OpLoad %24 %29
%32 = OpFOrdGreaterThan %22 %30 %31
OpSelectionMerge %34 None
OpBranchConditional %32 %33 %46
%33 = OpLabel
%40 = OpFAdd %24 %71 %30
%45 = OpISub %6 %73 %21
OpBranch %34
%46 = OpLabel
%50 = OpFMul %24 %71 %30
%54 = OpSDiv %6 %73 %21
OpBranch %34
%34 = OpLabel
%77 = OpPhi %6 %45 %33 %54 %46
%76 = OpPhi %24 %40 %33 %50 %46
%57 = OpIAdd %6 %70 %56
OpBranch %10
%12 = OpLabel
%61 = OpAccessChain %28 %27 %9
%62 = OpLoad %24 %61
%66 = OpConvertSToF %24 %21
%68 = OpConvertSToF %24 %73
%69 = OpCompositeConstruct %58 %62 %71 %66 %68
OpStore %60 %69
OpReturn
OpFunctionEnd
)";
std::string expected = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main" %60
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
OpName %16 "buf2"
OpMemberName %16 0 "i"
OpName %18 ""
OpName %25 "buf1"
OpMemberName %25 0 "f"
OpName %27 ""
OpName %60 "_GLF_color"
OpMemberDecorate %16 0 Offset 0
OpDecorate %16 Block
OpDecorate %18 DescriptorSet 0
OpDecorate %18 Binding 2
OpMemberDecorate %25 0 Offset 0
OpDecorate %25 Block
OpDecorate %27 DescriptorSet 0
OpDecorate %27 Binding 1
OpDecorate %60 Location 0
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%9 = OpConstant %6 0
%16 = OpTypeStruct %6
%17 = OpTypePointer Uniform %16
%18 = OpVariable %17 Uniform
%19 = OpTypePointer Uniform %6
%22 = OpTypeBool
%100 = OpConstantTrue %22
%24 = OpTypeFloat 32
%25 = OpTypeStruct %24
%26 = OpTypePointer Uniform %25
%27 = OpVariable %26 Uniform
%28 = OpTypePointer Uniform %24
%31 = OpConstant %24 2
%56 = OpConstant %6 1
%58 = OpTypeVector %24 4
%59 = OpTypePointer Output %58
%60 = OpVariable %59 Output
%72 = OpUndef %24
%74 = OpUndef %6
%4 = OpFunction %2 None %3
%5 = OpLabel
OpBranch %10
%10 = OpLabel
OpLoopMerge %12 %34 None
OpBranchConditional %100 %11 %12
%11 = OpLabel
OpSelectionMerge %34 None
OpBranchConditional %100 %33 %46
%33 = OpLabel
OpBranch %34
%46 = OpLabel
OpBranch %34
%34 = OpLabel
OpBranch %10
%12 = OpLabel
OpReturn
OpFunctionEnd
)";
spv_target_env env = SPV_ENV_UNIVERSAL_1_3;
Reducer reducer(env);
PingPongInteresting ping_pong_interesting(10);
reducer.SetMessageConsumer(NopDiagnostic);
reducer.SetInterestingnessFunction(
[&](const std::vector<uint32_t>& binary, uint32_t) -> bool {
return ping_pong_interesting.IsInteresting(binary);
});
reducer.AddReductionPass(MakeUnique<OperandToConstReductionPass>(env));
reducer.AddReductionPass(
MakeUnique<RemoveUnreferencedInstructionReductionPass>(env));
std::vector<uint32_t> binary_in;
SpirvTools t(env);
ASSERT_TRUE(t.Assemble(original, &binary_in, kReduceAssembleOption));
std::vector<uint32_t> binary_out;
spvtools::ReducerOptions reducer_options;
reducer_options.set_step_limit(500);
reducer.Run(std::move(binary_in), &binary_out, reducer_options);
CheckEqual(env, expected, binary_out);
}
TEST(ReducerTest, RemoveOpnameAndRemoveUnreferenced) {
const std::string original = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %2 "main"
OpExecutionMode %2 OriginUpperLeft
OpSource ESSL 310
OpName %2 "main"
OpName %3 "a"
OpName %4 "this-name-counts-as-usage-for-load-instruction"
%5 = OpTypeVoid
%6 = OpTypeFunction %5
%7 = OpTypeFloat 32
%8 = OpTypePointer Function %7
%9 = OpConstant %7 1
%2 = OpFunction %5 None %6
%10 = OpLabel
%3 = OpVariable %8 Function
%4 = OpLoad %7 %3
OpStore %3 %7
OpReturn
OpFunctionEnd
)";
const std::string expected = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %2 "main"
OpExecutionMode %2 OriginUpperLeft
OpSource ESSL 310
%5 = OpTypeVoid
%6 = OpTypeFunction %5
%7 = OpTypeFloat 32
%8 = OpTypePointer Function %7
%9 = OpConstant %7 1
%2 = OpFunction %5 None %6
%10 = OpLabel
OpReturn
OpFunctionEnd
)";
spv_target_env env = SPV_ENV_UNIVERSAL_1_3;
Reducer reducer(env);
// Make ping-pong interesting very quickly, as there are not much
// opportunities.
PingPongInteresting ping_pong_interesting(1);
reducer.SetMessageConsumer(NopDiagnostic);
reducer.SetInterestingnessFunction(
[&](const std::vector<uint32_t>& binary, uint32_t) -> bool {
return ping_pong_interesting.IsInteresting(binary);
});
reducer.AddReductionPass(
MakeUnique<RemoveOpNameInstructionReductionPass>(env));
reducer.AddReductionPass(
MakeUnique<RemoveUnreferencedInstructionReductionPass>(env));
std::vector<uint32_t> binary_in;
SpirvTools t(env);
ASSERT_TRUE(t.Assemble(original, &binary_in, kReduceAssembleOption));
std::vector<uint32_t> binary_out;
spvtools::ReducerOptions reducer_options;
reducer_options.set_step_limit(500);
reducer.Run(std::move(binary_in), &binary_out, reducer_options);
CheckEqual(env, expected, binary_out);
}
} // namespace
} // namespace reduce
} // namespace spvtools