mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-11-29 14:31:04 +00:00
307 lines
9.8 KiB
C++
307 lines
9.8 KiB
C++
// Copyright (c) 2021 Google LLC.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "source/opt/control_dependence.h"
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#include <algorithm>
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#include <vector>
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#include "gmock/gmock-matchers.h"
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#include "gtest/gtest.h"
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#include "source/opt/build_module.h"
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#include "source/opt/cfg.h"
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#include "test/opt/function_utils.h"
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namespace spvtools {
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namespace opt {
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namespace {
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void GatherEdges(const ControlDependenceAnalysis& cdg,
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std::vector<ControlDependence>& ret) {
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cdg.ForEachBlockLabel([&](uint32_t label) {
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ret.reserve(ret.size() + cdg.GetDependenceTargets(label).size());
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ret.insert(ret.end(), cdg.GetDependenceTargets(label).begin(),
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cdg.GetDependenceTargets(label).end());
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});
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std::sort(ret.begin(), ret.end());
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// Verify that reverse graph is the same.
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std::vector<ControlDependence> reverse_edges;
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reverse_edges.reserve(ret.size());
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cdg.ForEachBlockLabel([&](uint32_t label) {
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reverse_edges.insert(reverse_edges.end(),
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cdg.GetDependenceSources(label).begin(),
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cdg.GetDependenceSources(label).end());
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});
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std::sort(reverse_edges.begin(), reverse_edges.end());
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ASSERT_THAT(reverse_edges, testing::ElementsAreArray(ret));
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}
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using ControlDependenceTest = ::testing::Test;
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TEST(ControlDependenceTest, DependenceSimpleCFG) {
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const std::string text = R"(
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OpCapability Addresses
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OpCapability Kernel
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OpMemoryModel Physical64 OpenCL
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OpEntryPoint Kernel %1 "main"
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%2 = OpTypeVoid
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%3 = OpTypeFunction %2
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%4 = OpTypeBool
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%5 = OpTypeInt 32 0
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%6 = OpConstant %5 0
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%7 = OpConstantFalse %4
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%8 = OpConstantTrue %4
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%9 = OpConstant %5 1
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%1 = OpFunction %2 None %3
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%10 = OpLabel
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OpBranch %11
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%11 = OpLabel
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OpSwitch %6 %12 1 %13
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%12 = OpLabel
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OpBranch %14
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%13 = OpLabel
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OpBranch %14
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%14 = OpLabel
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OpBranchConditional %8 %15 %16
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%15 = OpLabel
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OpBranch %19
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%16 = OpLabel
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OpBranchConditional %8 %17 %18
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%17 = OpLabel
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OpBranch %18
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%18 = OpLabel
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OpBranch %19
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%19 = OpLabel
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OpReturn
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OpFunctionEnd
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)";
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// CFG: (all edges pointing downward)
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// %10
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// |
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// %11
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// / \ (R: %6 == 1, L: default)
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// %12 %13
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// \ /
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// %14
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// T/ \F
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// %15 %16
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// | T/ |F
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// | %17|
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// | \ |
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// | %18
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// | /
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// %19
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std::unique_ptr<IRContext> context =
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BuildModule(SPV_ENV_UNIVERSAL_1_0, nullptr, text,
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SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
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Module* module = context->module();
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EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n"
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<< text << std::endl;
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const Function* fn = spvtest::GetFunction(module, 1);
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const BasicBlock* entry = spvtest::GetBasicBlock(fn, 10);
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EXPECT_EQ(entry, fn->entry().get())
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<< "The entry node is not the expected one";
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{
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PostDominatorAnalysis pdom;
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const CFG& cfg = *context->cfg();
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pdom.InitializeTree(cfg, fn);
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ControlDependenceAnalysis cdg;
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cdg.ComputeControlDependenceGraph(cfg, pdom);
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// Test HasBlock.
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for (uint32_t id = 10; id <= 19; id++) {
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EXPECT_TRUE(cdg.HasBlock(id));
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}
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EXPECT_TRUE(cdg.HasBlock(ControlDependenceAnalysis::kPseudoEntryBlock));
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// Check blocks before/after valid range.
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EXPECT_FALSE(cdg.HasBlock(5));
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EXPECT_FALSE(cdg.HasBlock(25));
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EXPECT_FALSE(cdg.HasBlock(UINT32_MAX));
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// Test ForEachBlockLabel.
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std::set<uint32_t> block_labels;
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cdg.ForEachBlockLabel([&block_labels](uint32_t id) {
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bool inserted = block_labels.insert(id).second;
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EXPECT_TRUE(inserted); // Should have no duplicates.
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});
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EXPECT_THAT(block_labels, testing::ElementsAre(0, 10, 11, 12, 13, 14, 15,
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16, 17, 18, 19));
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{
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// Test WhileEachBlockLabel.
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uint32_t iters = 0;
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EXPECT_TRUE(cdg.WhileEachBlockLabel([&iters](uint32_t) {
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++iters;
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return true;
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}));
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EXPECT_EQ((uint32_t)block_labels.size(), iters);
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iters = 0;
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EXPECT_FALSE(cdg.WhileEachBlockLabel([&iters](uint32_t) {
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++iters;
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return false;
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}));
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EXPECT_EQ(1, iters);
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}
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// Test IsDependent.
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EXPECT_TRUE(cdg.IsDependent(12, 11));
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EXPECT_TRUE(cdg.IsDependent(13, 11));
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EXPECT_TRUE(cdg.IsDependent(15, 14));
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EXPECT_TRUE(cdg.IsDependent(16, 14));
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EXPECT_TRUE(cdg.IsDependent(18, 14));
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EXPECT_TRUE(cdg.IsDependent(17, 16));
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EXPECT_TRUE(cdg.IsDependent(10, 0));
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EXPECT_TRUE(cdg.IsDependent(11, 0));
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EXPECT_TRUE(cdg.IsDependent(14, 0));
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EXPECT_TRUE(cdg.IsDependent(19, 0));
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EXPECT_FALSE(cdg.IsDependent(14, 11));
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EXPECT_FALSE(cdg.IsDependent(17, 14));
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EXPECT_FALSE(cdg.IsDependent(19, 14));
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EXPECT_FALSE(cdg.IsDependent(12, 0));
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// Test GetDependenceSources/Targets.
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std::vector<ControlDependence> edges;
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GatherEdges(cdg, edges);
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EXPECT_THAT(edges,
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testing::ElementsAre(
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ControlDependence(0, 10), ControlDependence(0, 11, 10),
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ControlDependence(0, 14, 10), ControlDependence(0, 19, 10),
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ControlDependence(11, 12), ControlDependence(11, 13),
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ControlDependence(14, 15), ControlDependence(14, 16),
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ControlDependence(14, 18, 16), ControlDependence(16, 17)));
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const uint32_t expected_condition_ids[] = {
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0, 0, 0, 0, 6, 6, 8, 8, 8, 8,
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};
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for (uint32_t i = 0; i < edges.size(); i++) {
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EXPECT_EQ(expected_condition_ids[i], edges[i].GetConditionID(cfg));
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}
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}
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}
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TEST(ControlDependenceTest, DependencePaperCFG) {
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const std::string text = R"(
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OpCapability Addresses
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OpCapability Kernel
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OpMemoryModel Physical64 OpenCL
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OpEntryPoint Kernel %101 "main"
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%102 = OpTypeVoid
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%103 = OpTypeFunction %102
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%104 = OpTypeBool
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%108 = OpConstantTrue %104
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%101 = OpFunction %102 None %103
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%1 = OpLabel
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OpBranch %2
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%2 = OpLabel
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OpBranchConditional %108 %3 %7
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%3 = OpLabel
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OpBranchConditional %108 %4 %5
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%4 = OpLabel
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OpBranch %6
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%5 = OpLabel
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OpBranch %6
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%6 = OpLabel
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OpBranch %8
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%7 = OpLabel
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OpBranch %8
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%8 = OpLabel
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OpBranch %9
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%9 = OpLabel
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OpBranchConditional %108 %10 %11
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%10 = OpLabel
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OpBranch %11
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%11 = OpLabel
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OpBranchConditional %108 %12 %9
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%12 = OpLabel
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OpBranchConditional %108 %13 %2
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%13 = OpLabel
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OpReturn
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OpFunctionEnd
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)";
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// CFG: (edges pointing downward if no arrow)
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// %1
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// |
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// %2 <----+
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// T/ \F |
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// %3 \ |
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// T/ \F \ |
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// %4 %5 %7 |
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// \ / / |
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// %6 / |
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// \ / |
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// %8 |
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// | |
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// %9 <-+ |
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// T/ | | |
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// %10 | | |
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// \ | | |
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// %11-F+ |
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// T| |
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// %12-F---+
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// T|
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// %13
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std::unique_ptr<IRContext> context =
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BuildModule(SPV_ENV_UNIVERSAL_1_0, nullptr, text,
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SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
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Module* module = context->module();
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EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n"
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<< text << std::endl;
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const Function* fn = spvtest::GetFunction(module, 101);
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const BasicBlock* entry = spvtest::GetBasicBlock(fn, 1);
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EXPECT_EQ(entry, fn->entry().get())
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<< "The entry node is not the expected one";
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{
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PostDominatorAnalysis pdom;
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const CFG& cfg = *context->cfg();
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pdom.InitializeTree(cfg, fn);
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ControlDependenceAnalysis cdg;
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cdg.ComputeControlDependenceGraph(cfg, pdom);
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std::vector<ControlDependence> edges;
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GatherEdges(cdg, edges);
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EXPECT_THAT(
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edges, testing::ElementsAre(
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ControlDependence(0, 1), ControlDependence(0, 2, 1),
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ControlDependence(0, 8, 1), ControlDependence(0, 9, 1),
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ControlDependence(0, 11, 1), ControlDependence(0, 12, 1),
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ControlDependence(0, 13, 1), ControlDependence(2, 3),
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ControlDependence(2, 6, 3), ControlDependence(2, 7),
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ControlDependence(3, 4), ControlDependence(3, 5),
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ControlDependence(9, 10), ControlDependence(11, 9),
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ControlDependence(11, 11, 9), ControlDependence(12, 2),
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ControlDependence(12, 8, 2), ControlDependence(12, 9, 2),
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ControlDependence(12, 11, 2), ControlDependence(12, 12, 2)));
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const uint32_t expected_condition_ids[] = {
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0, 0, 0, 0, 0, 0, 0, 108, 108, 108,
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108, 108, 108, 108, 108, 108, 108, 108, 108, 108,
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};
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for (uint32_t i = 0; i < edges.size(); i++) {
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EXPECT_EQ(expected_condition_ids[i], edges[i].GetConditionID(cfg));
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}
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}
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}
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} // namespace
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} // namespace opt
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} // namespace spvtools
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