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swiftshader / SwiftShader / cd848cd695a460a223de0658b7f8553d012b4184 / . / third_party / SPIRV-Tools / test / opt / loop_optimizations / dependence_analysis.cpp
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// 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 <memory>
#include <set>
#include <string>
#include <unordered_set>
#include <utility>
#include <vector>
#include "gmock/gmock.h"
#include "source/opt/iterator.h"
#include "source/opt/loop_dependence.h"
#include "source/opt/loop_descriptor.h"
#include "source/opt/pass.h"
#include "source/opt/tree_iterator.h"
#include "test/opt//assembly_builder.h"
#include "test/opt//function_utils.h"
#include "test/opt//pass_fixture.h"
#include "test/opt//pass_utils.h"
namespace spvtools {
namespace opt {
namespace {
using DependencyAnalysis = ::testing::Test;
/*
Generated from the following GLSL fragment shader
with --eliminate-local-multi-store
#version 440 core
void main(){
int[10] arr;
int[10] arr2;
int a = 2;
for (int i = 0; i < 10; i++) {
arr[a] = arr[3];
arr[a*2] = arr[a+3];
arr[6] = arr2[6];
arr[a+5] = arr2[7];
}
}
*/
TEST(DependencyAnalysis, ZIV) {
const std::string text = R"( OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource GLSL 440
OpName %4 "main"
OpName %25 "arr"
OpName %39 "arr2"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%9 = OpConstant %6 2
%11 = OpConstant %6 0
%18 = OpConstant %6 10
%19 = OpTypeBool
%21 = OpTypeInt 32 0
%22 = OpConstant %21 10
%23 = OpTypeArray %6 %22
%24 = OpTypePointer Function %23
%27 = OpConstant %6 3
%38 = OpConstant %6 6
%44 = OpConstant %6 5
%46 = OpConstant %6 7
%51 = OpConstant %6 1
%4 = OpFunction %2 None %3
%5 = OpLabel
%25 = OpVariable %24 Function
%39 = OpVariable %24 Function
OpBranch %12
%12 = OpLabel
%53 = OpPhi %6 %11 %5 %52 %15
OpLoopMerge %14 %15 None
OpBranch %16
%16 = OpLabel
%20 = OpSLessThan %19 %53 %18
OpBranchConditional %20 %13 %14
%13 = OpLabel
%28 = OpAccessChain %7 %25 %27
%29 = OpLoad %6 %28
%30 = OpAccessChain %7 %25 %9
OpStore %30 %29
%32 = OpIMul %6 %9 %9
%34 = OpIAdd %6 %9 %27
%35 = OpAccessChain %7 %25 %34
%36 = OpLoad %6 %35
%37 = OpAccessChain %7 %25 %32
OpStore %37 %36
%40 = OpAccessChain %7 %39 %38
%41 = OpLoad %6 %40
%42 = OpAccessChain %7 %25 %38
OpStore %42 %41
%45 = OpIAdd %6 %9 %44
%47 = OpAccessChain %7 %39 %46
%48 = OpLoad %6 %47
%49 = OpAccessChain %7 %25 %45
OpStore %49 %48
OpBranch %15
%15 = OpLabel
%52 = OpIAdd %6 %53 %51
OpBranch %12
%14 = OpLabel
OpReturn
OpFunctionEnd
)";
std::unique_ptr<IRContext> context =
BuildModule(SPV_ENV_UNIVERSAL_1_1, nullptr, text,
SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
Module* module = context->module();
EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n"
<< text << std::endl;
const Function* f = spvtest::GetFunction(module, 4);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store[4];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 13)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 4; ++i) {
EXPECT_TRUE(store[i]);
}
// 29 -> 30 tests looking through constants.
{
DistanceVector distance_vector{loops.size()};
EXPECT_TRUE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(29),
store[0], &distance_vector));
}
// 36 -> 37 tests looking through additions.
{
DistanceVector distance_vector{loops.size()};
EXPECT_TRUE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(36),
store[1], &distance_vector));
}
// 41 -> 42 tests looking at same index across two different arrays.
{
DistanceVector distance_vector{loops.size()};
EXPECT_TRUE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(41),
store[2], &distance_vector));
}
// 48 -> 49 tests looking through additions for same index in two different
// arrays.
{
DistanceVector distance_vector{loops.size()};
EXPECT_TRUE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(48),
store[3], &distance_vector));
}
}
/*
Generated from the following GLSL fragment shader
with --eliminate-local-multi-store
#version 440 core
layout(location = 0) in vec4 c;
void main(){
int[10] arr;
int[10] arr2;
int[10] arr3;
int[10] arr4;
int[10] arr5;
int N = int(c.x);
for (int i = 0; i < N; i++) {
arr[2*N] = arr[N];
arr2[2*N+1] = arr2[N];
arr3[2*N] = arr3[N-1];
arr4[N] = arr5[N];
}
}
*/
TEST(DependencyAnalysis, SymbolicZIV) {
const std::string text = R"( OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main" %12
OpExecutionMode %4 OriginUpperLeft
OpSource GLSL 440
OpName %4 "main"
OpName %12 "c"
OpName %33 "arr"
OpName %41 "arr2"
OpName %50 "arr3"
OpName %58 "arr4"
OpName %60 "arr5"
OpDecorate %12 Location 0
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%9 = OpTypeFloat 32
%10 = OpTypeVector %9 4
%11 = OpTypePointer Input %10
%12 = OpVariable %11 Input
%13 = OpTypeInt 32 0
%14 = OpConstant %13 0
%15 = OpTypePointer Input %9
%20 = OpConstant %6 0
%28 = OpTypeBool
%30 = OpConstant %13 10
%31 = OpTypeArray %6 %30
%32 = OpTypePointer Function %31
%34 = OpConstant %6 2
%44 = OpConstant %6 1
%4 = OpFunction %2 None %3
%5 = OpLabel
%33 = OpVariable %32 Function
%41 = OpVariable %32 Function
%50 = OpVariable %32 Function
%58 = OpVariable %32 Function
%60 = OpVariable %32 Function
%16 = OpAccessChain %15 %12 %14
%17 = OpLoad %9 %16
%18 = OpConvertFToS %6 %17
OpBranch %21
%21 = OpLabel
%67 = OpPhi %6 %20 %5 %66 %24
OpLoopMerge %23 %24 None
OpBranch %25
%25 = OpLabel
%29 = OpSLessThan %28 %67 %18
OpBranchConditional %29 %22 %23
%22 = OpLabel
%36 = OpIMul %6 %34 %18
%38 = OpAccessChain %7 %33 %18
%39 = OpLoad %6 %38
%40 = OpAccessChain %7 %33 %36
OpStore %40 %39
%43 = OpIMul %6 %34 %18
%45 = OpIAdd %6 %43 %44
%47 = OpAccessChain %7 %41 %18
%48 = OpLoad %6 %47
%49 = OpAccessChain %7 %41 %45
OpStore %49 %48
%52 = OpIMul %6 %34 %18
%54 = OpISub %6 %18 %44
%55 = OpAccessChain %7 %50 %54
%56 = OpLoad %6 %55
%57 = OpAccessChain %7 %50 %52
OpStore %57 %56
%62 = OpAccessChain %7 %60 %18
%63 = OpLoad %6 %62
%64 = OpAccessChain %7 %58 %18
OpStore %64 %63
OpBranch %24
%24 = OpLabel
%66 = OpIAdd %6 %67 %44
OpBranch %21
%23 = OpLabel
OpReturn
OpFunctionEnd
)";
std::unique_ptr<IRContext> context =
BuildModule(SPV_ENV_UNIVERSAL_1_1, nullptr, text,
SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
Module* module = context->module();
EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n"
<< text << std::endl;
const Function* f = spvtest::GetFunction(module, 4);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store[4];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 22)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 4; ++i) {
EXPECT_TRUE(store[i]);
}
// independent due to loop bounds (won't enter if N <= 0).
// 39 -> 40 tests looking through symbols and multiplicaiton.
{
DistanceVector distance_vector{loops.size()};
EXPECT_TRUE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(39),
store[0], &distance_vector));
}
// 48 -> 49 tests looking through symbols and multiplication + addition.
{
DistanceVector distance_vector{loops.size()};
EXPECT_TRUE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(48),
store[1], &distance_vector));
}
// 56 -> 57 tests looking through symbols and arithmetic on load and store.
{
DistanceVector distance_vector{loops.size()};
EXPECT_TRUE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(56),
store[2], &distance_vector));
}
// independent as different arrays
// 63 -> 64 tests looking through symbols and load/store from/to different
// arrays.
{
DistanceVector distance_vector{loops.size()};
EXPECT_TRUE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(63),
store[3], &distance_vector));
}
}
/*
Generated from the following GLSL fragment shader
with --eliminate-local-multi-store
#version 440 core
void a(){
int[10] arr;
int[11] arr2;
int[20] arr3;
int[20] arr4;
int a = 2;
for (int i = 0; i < 10; i++) {
arr[i] = arr[i];
arr2[i] = arr2[i+1];
arr3[i] = arr3[i-1];
arr4[2*i] = arr4[i];
}
}
void b(){
int[10] arr;
int[11] arr2;
int[20] arr3;
int[20] arr4;
int a = 2;
for (int i = 10; i > 0; i--) {
arr[i] = arr[i];
arr2[i] = arr2[i+1];
arr3[i] = arr3[i-1];
arr4[2*i] = arr4[i];
}
}
void main() {
a();
b();
}
*/
TEST(DependencyAnalysis, SIV) {
const std::string text = R"( OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource GLSL 440
OpName %4 "main"
OpName %6 "a("
OpName %8 "b("
OpName %12 "a"
OpName %14 "i"
OpName %29 "arr"
OpName %38 "arr2"
OpName %49 "arr3"
OpName %56 "arr4"
OpName %65 "a"
OpName %66 "i"
OpName %74 "arr"
OpName %80 "arr2"
OpName %87 "arr3"
OpName %94 "arr4"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%10 = OpTypeInt 32 1
%11 = OpTypePointer Function %10
%13 = OpConstant %10 2
%15 = OpConstant %10 0
%22 = OpConstant %10 10
%23 = OpTypeBool
%25 = OpTypeInt 32 0
%26 = OpConstant %25 10
%27 = OpTypeArray %10 %26
%28 = OpTypePointer Function %27
%35 = OpConstant %25 11
%36 = OpTypeArray %10 %35
%37 = OpTypePointer Function %36
%41 = OpConstant %10 1
%46 = OpConstant %25 20
%47 = OpTypeArray %10 %46
%48 = OpTypePointer Function %47
%4 = OpFunction %2 None %3
%5 = OpLabel
%103 = OpFunctionCall %2 %6
%104 = OpFunctionCall %2 %8
OpReturn
OpFunctionEnd
%6 = OpFunction %2 None %3
%7 = OpLabel
%12 = OpVariable %11 Function
%14 = OpVariable %11 Function
%29 = OpVariable %28 Function
%38 = OpVariable %37 Function
%49 = OpVariable %48 Function
%56 = OpVariable %48 Function
OpStore %12 %13
OpStore %14 %15
OpBranch %16
%16 = OpLabel
%105 = OpPhi %10 %15 %7 %64 %19
OpLoopMerge %18 %19 None
OpBranch %20
%20 = OpLabel
%24 = OpSLessThan %23 %105 %22
OpBranchConditional %24 %17 %18
%17 = OpLabel
%32 = OpAccessChain %11 %29 %105
%33 = OpLoad %10 %32
%34 = OpAccessChain %11 %29 %105
OpStore %34 %33
%42 = OpIAdd %10 %105 %41
%43 = OpAccessChain %11 %38 %42
%44 = OpLoad %10 %43
%45 = OpAccessChain %11 %38 %105
OpStore %45 %44
%52 = OpISub %10 %105 %41
%53 = OpAccessChain %11 %49 %52
%54 = OpLoad %10 %53
%55 = OpAccessChain %11 %49 %105
OpStore %55 %54
%58 = OpIMul %10 %13 %105
%60 = OpAccessChain %11 %56 %105
%61 = OpLoad %10 %60
%62 = OpAccessChain %11 %56 %58
OpStore %62 %61
OpBranch %19
%19 = OpLabel
%64 = OpIAdd %10 %105 %41
OpStore %14 %64
OpBranch %16
%18 = OpLabel
OpReturn
OpFunctionEnd
%8 = OpFunction %2 None %3
%9 = OpLabel
%65 = OpVariable %11 Function
%66 = OpVariable %11 Function
%74 = OpVariable %28 Function
%80 = OpVariable %37 Function
%87 = OpVariable %48 Function
%94 = OpVariable %48 Function
OpStore %65 %13
OpStore %66 %22
OpBranch %67
%67 = OpLabel
%106 = OpPhi %10 %22 %9 %102 %70
OpLoopMerge %69 %70 None
OpBranch %71
%71 = OpLabel
%73 = OpSGreaterThan %23 %106 %15
OpBranchConditional %73 %68 %69
%68 = OpLabel
%77 = OpAccessChain %11 %74 %106
%78 = OpLoad %10 %77
%79 = OpAccessChain %11 %74 %106
OpStore %79 %78
%83 = OpIAdd %10 %106 %41
%84 = OpAccessChain %11 %80 %83
%85 = OpLoad %10 %84
%86 = OpAccessChain %11 %80 %106
OpStore %86 %85
%90 = OpISub %10 %106 %41
%91 = OpAccessChain %11 %87 %90
%92 = OpLoad %10 %91
%93 = OpAccessChain %11 %87 %106
OpStore %93 %92
%96 = OpIMul %10 %13 %106
%98 = OpAccessChain %11 %94 %106
%99 = OpLoad %10 %98
%100 = OpAccessChain %11 %94 %96
OpStore %100 %99
OpBranch %70
%70 = OpLabel
%102 = OpISub %10 %106 %41
OpStore %66 %102
OpBranch %67
%69 = OpLabel
OpReturn
OpFunctionEnd
)";
std::unique_ptr<IRContext> context =
BuildModule(SPV_ENV_UNIVERSAL_1_1, nullptr, text,
SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
Module* module = context->module();
EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n"
<< text << std::endl;
// For the loop in function a.
{
const Function* f = spvtest::GetFunction(module, 6);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store[4];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 17)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 4; ++i) {
EXPECT_TRUE(store[i]);
}
// = dependence
// 33 -> 34 tests looking at SIV in same array.
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(33), store[0], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::DISTANCE);
EXPECT_EQ(distance_vector.GetEntries()[0].direction,
DistanceEntry::Directions::EQ);
EXPECT_EQ(distance_vector.GetEntries()[0].distance, 0);
}
// > -1 dependence
// 44 -> 45 tests looking at SIV in same array with addition.
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(44), store[1], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::DISTANCE);
EXPECT_EQ(distance_vector.GetEntries()[0].direction,
DistanceEntry::Directions::GT);
EXPECT_EQ(distance_vector.GetEntries()[0].distance, -1);
}
// < 1 dependence
// 54 -> 55 tests looking at SIV in same array with subtraction.
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(54), store[2], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::DISTANCE);
EXPECT_EQ(distance_vector.GetEntries()[0].direction,
DistanceEntry::Directions::LT);
EXPECT_EQ(distance_vector.GetEntries()[0].distance, 1);
}
// <=> dependence
// 61 -> 62 tests looking at SIV in same array with multiplication.
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(61), store[3], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::UNKNOWN);
EXPECT_EQ(distance_vector.GetEntries()[0].direction,
DistanceEntry::Directions::ALL);
}
}
// For the loop in function b.
{
const Function* f = spvtest::GetFunction(module, 8);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store[4];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 68)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 4; ++i) {
EXPECT_TRUE(store[i]);
}
// = dependence
// 78 -> 79 tests looking at SIV in same array.
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(78), store[0], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::DISTANCE);
EXPECT_EQ(distance_vector.GetEntries()[0].direction,
DistanceEntry::Directions::EQ);
EXPECT_EQ(distance_vector.GetEntries()[0].distance, 0);
}
// < 1 dependence
// 85 -> 86 tests looking at SIV in same array with addition.
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(85), store[1], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::DISTANCE);
EXPECT_EQ(distance_vector.GetEntries()[0].direction,
DistanceEntry::Directions::LT);
EXPECT_EQ(distance_vector.GetEntries()[0].distance, 1);
}
// > -1 dependence
// 92 -> 93 tests looking at SIV in same array with subtraction.
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(92), store[2], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::DISTANCE);
EXPECT_EQ(distance_vector.GetEntries()[0].direction,
DistanceEntry::Directions::GT);
EXPECT_EQ(distance_vector.GetEntries()[0].distance, -1);
}
// <=> dependence
// 99 -> 100 tests looking at SIV in same array with multiplication.
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(99), store[3], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::UNKNOWN);
EXPECT_EQ(distance_vector.GetEntries()[0].direction,
DistanceEntry::Directions::ALL);
}
}
}
/*
Generated from the following GLSL fragment shader
with --eliminate-local-multi-store
#version 440 core
layout(location = 0) in vec4 c;
void a() {
int[13] arr;
int[15] arr2;
int[18] arr3;
int[18] arr4;
int N = int(c.x);
int C = 2;
int a = 2;
for (int i = 0; i < N; i++) { // Bounds are N - 1
arr[i+2*N] = arr[i+N]; // |distance| = N
arr2[i+N] = arr2[i+2*N] + C; // |distance| = N
arr3[2*i+2*N+1] = arr3[2*i+N+1]; // |distance| = N
arr4[a*i+N+1] = arr4[a*i+2*N+1]; // |distance| = N
}
}
void b() {
int[13] arr;
int[15] arr2;
int[18] arr3;
int[18] arr4;
int N = int(c.x);
int C = 2;
int a = 2;
for (int i = N; i > 0; i--) { // Bounds are N - 1
arr[i+2*N] = arr[i+N]; // |distance| = N
arr2[i+N] = arr2[i+2*N] + C; // |distance| = N
arr3[2*i+2*N+1] = arr3[2*i+N+1]; // |distance| = N
arr4[a*i+N+1] = arr4[a*i+2*N+1]; // |distance| = N
}
}
void main(){
a();
b();
}*/
TEST(DependencyAnalysis, SymbolicSIV) {
const std::string text = R"( OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main" %16
OpExecutionMode %4 OriginUpperLeft
OpSource GLSL 440
OpName %4 "main"
OpName %6 "a("
OpName %8 "b("
OpName %12 "N"
OpName %16 "c"
OpName %23 "C"
OpName %25 "a"
OpName %26 "i"
OpName %40 "arr"
OpName %54 "arr2"
OpName %70 "arr3"
OpName %86 "arr4"
OpName %105 "N"
OpName %109 "C"
OpName %110 "a"
OpName %111 "i"
OpName %120 "arr"
OpName %131 "arr2"
OpName %144 "arr3"
OpName %159 "arr4"
OpDecorate %16 Location 0
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%10 = OpTypeInt 32 1
%11 = OpTypePointer Function %10
%13 = OpTypeFloat 32
%14 = OpTypeVector %13 4
%15 = OpTypePointer Input %14
%16 = OpVariable %15 Input
%17 = OpTypeInt 32 0
%18 = OpConstant %17 0
%19 = OpTypePointer Input %13
%24 = OpConstant %10 2
%27 = OpConstant %10 0
%35 = OpTypeBool
%37 = OpConstant %17 13
%38 = OpTypeArray %10 %37
%39 = OpTypePointer Function %38
%51 = OpConstant %17 15
%52 = OpTypeArray %10 %51
%53 = OpTypePointer Function %52
%67 = OpConstant %17 18
%68 = OpTypeArray %10 %67
%69 = OpTypePointer Function %68
%76 = OpConstant %10 1
%4 = OpFunction %2 None %3
%5 = OpLabel
%178 = OpFunctionCall %2 %6
%179 = OpFunctionCall %2 %8
OpReturn
OpFunctionEnd
%6 = OpFunction %2 None %3
%7 = OpLabel
%12 = OpVariable %11 Function
%23 = OpVariable %11 Function
%25 = OpVariable %11 Function
%26 = OpVariable %11 Function
%40 = OpVariable %39 Function
%54 = OpVariable %53 Function
%70 = OpVariable %69 Function
%86 = OpVariable %69 Function
%20 = OpAccessChain %19 %16 %18
%21 = OpLoad %13 %20
%22 = OpConvertFToS %10 %21
OpStore %12 %22
OpStore %23 %24
OpStore %25 %24
OpStore %26 %27
OpBranch %28
%28 = OpLabel
%180 = OpPhi %10 %27 %7 %104 %31
OpLoopMerge %30 %31 None
OpBranch %32
%32 = OpLabel
%36 = OpSLessThan %35 %180 %22
OpBranchConditional %36 %29 %30
%29 = OpLabel
%43 = OpIMul %10 %24 %22
%44 = OpIAdd %10 %180 %43
%47 = OpIAdd %10 %180 %22
%48 = OpAccessChain %11 %40 %47
%49 = OpLoad %10 %48
%50 = OpAccessChain %11 %40 %44
OpStore %50 %49
%57 = OpIAdd %10 %180 %22
%60 = OpIMul %10 %24 %22
%61 = OpIAdd %10 %180 %60
%62 = OpAccessChain %11 %54 %61
%63 = OpLoad %10 %62
%65 = OpIAdd %10 %63 %24
%66 = OpAccessChain %11 %54 %57
OpStore %66 %65
%72 = OpIMul %10 %24 %180
%74 = OpIMul %10 %24 %22
%75 = OpIAdd %10 %72 %74
%77 = OpIAdd %10 %75 %76
%79 = OpIMul %10 %24 %180
%81 = OpIAdd %10 %79 %22
%82 = OpIAdd %10 %81 %76
%83 = OpAccessChain %11 %70 %82
%84 = OpLoad %10 %83
%85 = OpAccessChain %11 %70 %77
OpStore %85 %84
%89 = OpIMul %10 %24 %180
%91 = OpIAdd %10 %89 %22
%92 = OpIAdd %10 %91 %76
%95 = OpIMul %10 %24 %180
%97 = OpIMul %10 %24 %22
%98 = OpIAdd %10 %95 %97
%99 = OpIAdd %10 %98 %76
%100 = OpAccessChain %11 %86 %99
%101 = OpLoad %10 %100
%102 = OpAccessChain %11 %86 %92
OpStore %102 %101
OpBranch %31
%31 = OpLabel
%104 = OpIAdd %10 %180 %76
OpStore %26 %104
OpBranch %28
%30 = OpLabel
OpReturn
OpFunctionEnd
%8 = OpFunction %2 None %3
%9 = OpLabel
%105 = OpVariable %11 Function
%109 = OpVariable %11 Function
%110 = OpVariable %11 Function
%111 = OpVariable %11 Function
%120 = OpVariable %39 Function
%131 = OpVariable %53 Function
%144 = OpVariable %69 Function
%159 = OpVariable %69 Function
%106 = OpAccessChain %19 %16 %18
%107 = OpLoad %13 %106
%108 = OpConvertFToS %10 %107
OpStore %105 %108
OpStore %109 %24
OpStore %110 %24
OpStore %111 %108
OpBranch %113
%113 = OpLabel
%181 = OpPhi %10 %108 %9 %177 %116
OpLoopMerge %115 %116 None
OpBranch %117
%117 = OpLabel
%119 = OpSGreaterThan %35 %181 %27
OpBranchConditional %119 %114 %115
%114 = OpLabel
%123 = OpIMul %10 %24 %108
%124 = OpIAdd %10 %181 %123
%127 = OpIAdd %10 %181 %108
%128 = OpAccessChain %11 %120 %127
%129 = OpLoad %10 %128
%130 = OpAccessChain %11 %120 %124
OpStore %130 %129
%134 = OpIAdd %10 %181 %108
%137 = OpIMul %10 %24 %108
%138 = OpIAdd %10 %181 %137
%139 = OpAccessChain %11 %131 %138
%140 = OpLoad %10 %139
%142 = OpIAdd %10 %140 %24
%143 = OpAccessChain %11 %131 %134
OpStore %143 %142
%146 = OpIMul %10 %24 %181
%148 = OpIMul %10 %24 %108
%149 = OpIAdd %10 %146 %148
%150 = OpIAdd %10 %149 %76
%152 = OpIMul %10 %24 %181
%154 = OpIAdd %10 %152 %108
%155 = OpIAdd %10 %154 %76
%156 = OpAccessChain %11 %144 %155
%157 = OpLoad %10 %156
%158 = OpAccessChain %11 %144 %150
OpStore %158 %157
%162 = OpIMul %10 %24 %181
%164 = OpIAdd %10 %162 %108
%165 = OpIAdd %10 %164 %76
%168 = OpIMul %10 %24 %181
%170 = OpIMul %10 %24 %108
%171 = OpIAdd %10 %168 %170
%172 = OpIAdd %10 %171 %76
%173 = OpAccessChain %11 %159 %172
%174 = OpLoad %10 %173
%175 = OpAccessChain %11 %159 %165
OpStore %175 %174
OpBranch %116
%116 = OpLabel
%177 = OpISub %10 %181 %76
OpStore %111 %177
OpBranch %113
%115 = OpLabel
OpReturn
OpFunctionEnd
)";
std::unique_ptr<IRContext> context =
BuildModule(SPV_ENV_UNIVERSAL_1_1, nullptr, text,
SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
Module* module = context->module();
EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n"
<< text << std::endl;
// For the loop in function a.
{
const Function* f = spvtest::GetFunction(module, 6);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store[4];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 29)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 4; ++i) {
EXPECT_TRUE(store[i]);
}
// independent due to loop bounds (won't enter when N <= 0)
// 49 -> 50 tests looking through SIV and symbols with multiplication
{
DistanceVector distance_vector{loops.size()};
// Independent but not yet supported.
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(49), store[0], &distance_vector));
}
// 63 -> 66 tests looking through SIV and symbols with multiplication and +
// C
{
DistanceVector distance_vector{loops.size()};
// Independent.
EXPECT_TRUE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(63),
store[1], &distance_vector));
}
// 84 -> 85 tests looking through arithmetic on SIV and symbols
{
DistanceVector distance_vector{loops.size()};
// Independent but not yet supported.
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(84), store[2], &distance_vector));
}
// 101 -> 102 tests looking through symbol arithmetic on SIV and symbols
{
DistanceVector distance_vector{loops.size()};
// Independent.
EXPECT_TRUE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(101), store[3], &distance_vector));
}
}
// For the loop in function b.
{
const Function* f = spvtest::GetFunction(module, 8);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store[4];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 114)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 4; ++i) {
EXPECT_TRUE(store[i]);
}
// independent due to loop bounds (won't enter when N <= 0).
// 129 -> 130 tests looking through SIV and symbols with multiplication.
{
DistanceVector distance_vector{loops.size()};
// Independent but not yet supported.
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(129), store[0], &distance_vector));
}
// 140 -> 143 tests looking through SIV and symbols with multiplication and
// + C.
{
DistanceVector distance_vector{loops.size()};
// Independent.
EXPECT_TRUE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(140), store[1], &distance_vector));
}
// 157 -> 158 tests looking through arithmetic on SIV and symbols.
{
DistanceVector distance_vector{loops.size()};
// Independent but not yet supported.
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(157), store[2], &distance_vector));
}
// 174 -> 175 tests looking through symbol arithmetic on SIV and symbols.
{
DistanceVector distance_vector{loops.size()};
// Independent.
EXPECT_TRUE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(174), store[3], &distance_vector));
}
}
}
/*
Generated from the following GLSL fragment shader
with --eliminate-local-multi-store
#version 440 core
void a() {
int[6] arr;
int N = 5;
for (int i = 1; i < N; i++) {
arr[i] = arr[N-i];
}
}
void b() {
int[6] arr;
int N = 5;
for (int i = 1; i < N; i++) {
arr[N-i] = arr[i];
}
}
void c() {
int[11] arr;
int N = 10;
for (int i = 1; i < N; i++) {
arr[i] = arr[N-i+1];
}
}
void d() {
int[11] arr;
int N = 10;
for (int i = 1; i < N; i++) {
arr[N-i+1] = arr[i];
}
}
void e() {
int[6] arr;
int N = 5;
for (int i = N; i > 0; i--) {
arr[i] = arr[N-i];
}
}
void f() {
int[6] arr;
int N = 5;
for (int i = N; i > 0; i--) {
arr[N-i] = arr[i];
}
}
void g() {
int[11] arr;
int N = 10;
for (int i = N; i > 0; i--) {
arr[i] = arr[N-i+1];
}
}
void h() {
int[11] arr;
int N = 10;
for (int i = N; i > 0; i--) {
arr[N-i+1] = arr[i];
}
}
void main(){
a();
b();
c();
d();
e();
f();
g();
h();
}
*/
TEST(DependencyAnalysis, Crossing) {
const std::string text = R"( OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource GLSL 440
OpName %4 "main"
OpName %6 "a("
OpName %8 "b("
OpName %10 "c("
OpName %12 "d("
OpName %14 "e("
OpName %16 "f("
OpName %18 "g("
OpName %20 "h("
OpName %24 "N"
OpName %26 "i"
OpName %41 "arr"
OpName %51 "N"
OpName %52 "i"
OpName %61 "arr"
OpName %71 "N"
OpName %73 "i"
OpName %85 "arr"
OpName %96 "N"
OpName %97 "i"
OpName %106 "arr"
OpName %117 "N"
OpName %118 "i"
OpName %128 "arr"
OpName %138 "N"
OpName %139 "i"
OpName %148 "arr"
OpName %158 "N"
OpName %159 "i"
OpName %168 "arr"
OpName %179 "N"
OpName %180 "i"
OpName %189 "arr"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%22 = OpTypeInt 32 1
%23 = OpTypePointer Function %22
%25 = OpConstant %22 5
%27 = OpConstant %22 1
%35 = OpTypeBool
%37 = OpTypeInt 32 0
%38 = OpConstant %37 6
%39 = OpTypeArray %22 %38
%40 = OpTypePointer Function %39
%72 = OpConstant %22 10
%82 = OpConstant %37 11
%83 = OpTypeArray %22 %82
%84 = OpTypePointer Function %83
%126 = OpConstant %22 0
%4 = OpFunction %2 None %3
%5 = OpLabel
%200 = OpFunctionCall %2 %6
%201 = OpFunctionCall %2 %8
%202 = OpFunctionCall %2 %10
%203 = OpFunctionCall %2 %12
%204 = OpFunctionCall %2 %14
%205 = OpFunctionCall %2 %16
%206 = OpFunctionCall %2 %18
%207 = OpFunctionCall %2 %20
OpReturn
OpFunctionEnd
%6 = OpFunction %2 None %3
%7 = OpLabel
%24 = OpVariable %23 Function
%26 = OpVariable %23 Function
%41 = OpVariable %40 Function
OpStore %24 %25
OpStore %26 %27
OpBranch %28
%28 = OpLabel
%208 = OpPhi %22 %27 %7 %50 %31
OpLoopMerge %30 %31 None
OpBranch %32
%32 = OpLabel
%36 = OpSLessThan %35 %208 %25
OpBranchConditional %36 %29 %30
%29 = OpLabel
%45 = OpISub %22 %25 %208
%46 = OpAccessChain %23 %41 %45
%47 = OpLoad %22 %46
%48 = OpAccessChain %23 %41 %208
OpStore %48 %47
OpBranch %31
%31 = OpLabel
%50 = OpIAdd %22 %208 %27
OpStore %26 %50
OpBranch %28
%30 = OpLabel
OpReturn
OpFunctionEnd
%8 = OpFunction %2 None %3
%9 = OpLabel
%51 = OpVariable %23 Function
%52 = OpVariable %23 Function
%61 = OpVariable %40 Function
OpStore %51 %25
OpStore %52 %27
OpBranch %53
%53 = OpLabel
%209 = OpPhi %22 %27 %9 %70 %56
OpLoopMerge %55 %56 None
OpBranch %57
%57 = OpLabel
%60 = OpSLessThan %35 %209 %25
OpBranchConditional %60 %54 %55
%54 = OpLabel
%64 = OpISub %22 %25 %209
%66 = OpAccessChain %23 %61 %209
%67 = OpLoad %22 %66
%68 = OpAccessChain %23 %61 %64
OpStore %68 %67
OpBranch %56
%56 = OpLabel
%70 = OpIAdd %22 %209 %27
OpStore %52 %70
OpBranch %53
%55 = OpLabel
OpReturn
OpFunctionEnd
%10 = OpFunction %2 None %3
%11 = OpLabel
%71 = OpVariable %23 Function
%73 = OpVariable %23 Function
%85 = OpVariable %84 Function
OpStore %71 %72
OpStore %73 %27
OpBranch %74
%74 = OpLabel
%210 = OpPhi %22 %27 %11 %95 %77
OpLoopMerge %76 %77 None
OpBranch %78
%78 = OpLabel
%81 = OpSLessThan %35 %210 %72
OpBranchConditional %81 %75 %76
%75 = OpLabel
%89 = OpISub %22 %72 %210
%90 = OpIAdd %22 %89 %27
%91 = OpAccessChain %23 %85 %90
%92 = OpLoad %22 %91
%93 = OpAccessChain %23 %85 %210
OpStore %93 %92
OpBranch %77
%77 = OpLabel
%95 = OpIAdd %22 %210 %27
OpStore %73 %95
OpBranch %74
%76 = OpLabel
OpReturn
OpFunctionEnd
%12 = OpFunction %2 None %3
%13 = OpLabel
%96 = OpVariable %23 Function
%97 = OpVariable %23 Function
%106 = OpVariable %84 Function
OpStore %96 %72
OpStore %97 %27
OpBranch %98
%98 = OpLabel
%211 = OpPhi %22 %27 %13 %116 %101
OpLoopMerge %100 %101 None
OpBranch %102
%102 = OpLabel
%105 = OpSLessThan %35 %211 %72
OpBranchConditional %105 %99 %100
%99 = OpLabel
%109 = OpISub %22 %72 %211
%110 = OpIAdd %22 %109 %27
%112 = OpAccessChain %23 %106 %211
%113 = OpLoad %22 %112
%114 = OpAccessChain %23 %106 %110
OpStore %114 %113
OpBranch %101
%101 = OpLabel
%116 = OpIAdd %22 %211 %27
OpStore %97 %116
OpBranch %98
%100 = OpLabel
OpReturn
OpFunctionEnd
%14 = OpFunction %2 None %3
%15 = OpLabel
%117 = OpVariable %23 Function
%118 = OpVariable %23 Function
%128 = OpVariable %40 Function
OpStore %117 %25
OpStore %118 %25
OpBranch %120
%120 = OpLabel
%212 = OpPhi %22 %25 %15 %137 %123
OpLoopMerge %122 %123 None
OpBranch %124
%124 = OpLabel
%127 = OpSGreaterThan %35 %212 %126
OpBranchConditional %127 %121 %122
%121 = OpLabel
%132 = OpISub %22 %25 %212
%133 = OpAccessChain %23 %128 %132
%134 = OpLoad %22 %133
%135 = OpAccessChain %23 %128 %212
OpStore %135 %134
OpBranch %123
%123 = OpLabel
%137 = OpISub %22 %212 %27
OpStore %118 %137
OpBranch %120
%122 = OpLabel
OpReturn
OpFunctionEnd
%16 = OpFunction %2 None %3
%17 = OpLabel
%138 = OpVariable %23 Function
%139 = OpVariable %23 Function
%148 = OpVariable %40 Function
OpStore %138 %25
OpStore %139 %25
OpBranch %141
%141 = OpLabel
%213 = OpPhi %22 %25 %17 %157 %144
OpLoopMerge %143 %144 None
OpBranch %145
%145 = OpLabel
%147 = OpSGreaterThan %35 %213 %126
OpBranchConditional %147 %142 %143
%142 = OpLabel
%151 = OpISub %22 %25 %213
%153 = OpAccessChain %23 %148 %213
%154 = OpLoad %22 %153
%155 = OpAccessChain %23 %148 %151
OpStore %155 %154
OpBranch %144
%144 = OpLabel
%157 = OpISub %22 %213 %27
OpStore %139 %157
OpBranch %141
%143 = OpLabel
OpReturn
OpFunctionEnd
%18 = OpFunction %2 None %3
%19 = OpLabel
%158 = OpVariable %23 Function
%159 = OpVariable %23 Function
%168 = OpVariable %84 Function
OpStore %158 %72
OpStore %159 %72
OpBranch %161
%161 = OpLabel
%214 = OpPhi %22 %72 %19 %178 %164
OpLoopMerge %163 %164 None
OpBranch %165
%165 = OpLabel
%167 = OpSGreaterThan %35 %214 %126
OpBranchConditional %167 %162 %163
%162 = OpLabel
%172 = OpISub %22 %72 %214
%173 = OpIAdd %22 %172 %27
%174 = OpAccessChain %23 %168 %173
%175 = OpLoad %22 %174
%176 = OpAccessChain %23 %168 %214
OpStore %176 %175
OpBranch %164
%164 = OpLabel
%178 = OpISub %22 %214 %27
OpStore %159 %178
OpBranch %161
%163 = OpLabel
OpReturn
OpFunctionEnd
%20 = OpFunction %2 None %3
%21 = OpLabel
%179 = OpVariable %23 Function
%180 = OpVariable %23 Function
%189 = OpVariable %84 Function
OpStore %179 %72
OpStore %180 %72
OpBranch %182
%182 = OpLabel
%215 = OpPhi %22 %72 %21 %199 %185
OpLoopMerge %184 %185 None
OpBranch %186
%186 = OpLabel
%188 = OpSGreaterThan %35 %215 %126
OpBranchConditional %188 %183 %184
%183 = OpLabel
%192 = OpISub %22 %72 %215
%193 = OpIAdd %22 %192 %27
%195 = OpAccessChain %23 %189 %215
%196 = OpLoad %22 %195
%197 = OpAccessChain %23 %189 %193
OpStore %197 %196
OpBranch %185
%185 = OpLabel
%199 = OpISub %22 %215 %27
OpStore %180 %199
OpBranch %182
%184 = OpLabel
OpReturn
OpFunctionEnd
)";
std::unique_ptr<IRContext> context =
BuildModule(SPV_ENV_UNIVERSAL_1_1, nullptr, text,
SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
Module* module = context->module();
EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n"
<< text << std::endl;
// First two tests can be split into two loops.
// Tests even crossing subscripts from low to high indexes.
// 47 -> 48
{
const Function* f = spvtest::GetFunction(module, 6);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store = nullptr;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 29)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store = &inst;
}
}
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(47),
store, &distance_vector));
}
// Tests even crossing subscripts from high to low indexes.
// 67 -> 68
{
const Function* f = spvtest::GetFunction(module, 8);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store = nullptr;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 54)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store = &inst;
}
}
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(67),
store, &distance_vector));
}
// Next two tests can have an end peeled, then be split.
// Tests uneven crossing subscripts from low to high indexes.
// 92 -> 93
{
const Function* f = spvtest::GetFunction(module, 10);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store = nullptr;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 75)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store = &inst;
}
}
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(92),
store, &distance_vector));
}
// Tests uneven crossing subscripts from high to low indexes.
// 113 -> 114
{
const Function* f = spvtest::GetFunction(module, 12);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store = nullptr;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 99)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store = &inst;
}
}
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(113),
store, &distance_vector));
}
// First two tests can be split into two loops.
// Tests even crossing subscripts from low to high indexes.
// 134 -> 135
{
const Function* f = spvtest::GetFunction(module, 14);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store = nullptr;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 121)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store = &inst;
}
}
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(134),
store, &distance_vector));
}
// Tests even crossing subscripts from high to low indexes.
// 154 -> 155
{
const Function* f = spvtest::GetFunction(module, 16);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store = nullptr;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 142)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store = &inst;
}
}
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(154),
store, &distance_vector));
}
// Next two tests can have an end peeled, then be split.
// Tests uneven crossing subscripts from low to high indexes.
// 175 -> 176
{
const Function* f = spvtest::GetFunction(module, 18);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store = nullptr;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 162)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store = &inst;
}
}
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(175),
store, &distance_vector));
}
// Tests uneven crossing subscripts from high to low indexes.
// 196 -> 197
{
const Function* f = spvtest::GetFunction(module, 20);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store = nullptr;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 183)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store = &inst;
}
}
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(196),
store, &distance_vector));
}
}
/*
Generated from the following GLSL fragment shader
with --eliminate-local-multi-store
#version 440 core
void a() {
int[10] arr;
for (int i = 0; i < 10; i++) {
arr[0] = arr[i]; // peel first
arr[i] = arr[0]; // peel first
arr[9] = arr[i]; // peel last
arr[i] = arr[9]; // peel last
}
}
void b() {
int[11] arr;
for (int i = 0; i <= 10; i++) {
arr[0] = arr[i]; // peel first
arr[i] = arr[0]; // peel first
arr[10] = arr[i]; // peel last
arr[i] = arr[10]; // peel last
}
}
void c() {
int[11] arr;
for (int i = 10; i > 0; i--) {
arr[10] = arr[i]; // peel first
arr[i] = arr[10]; // peel first
arr[1] = arr[i]; // peel last
arr[i] = arr[1]; // peel last
}
}
void d() {
int[11] arr;
for (int i = 10; i >= 0; i--) {
arr[10] = arr[i]; // peel first
arr[i] = arr[10]; // peel first
arr[0] = arr[i]; // peel last
arr[i] = arr[0]; // peel last
}
}
void main(){
a();
b();
c();
d();
}
*/
TEST(DependencyAnalysis, WeakZeroSIV) {
const std::string text = R"( OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource GLSL 440
OpName %4 "main"
OpName %6 "a("
OpName %8 "b("
OpName %10 "c("
OpName %12 "d("
OpName %16 "i"
OpName %31 "arr"
OpName %52 "i"
OpName %63 "arr"
OpName %82 "i"
OpName %90 "arr"
OpName %109 "i"
OpName %117 "arr"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%14 = OpTypeInt 32 1
%15 = OpTypePointer Function %14
%17 = OpConstant %14 0
%24 = OpConstant %14 10
%25 = OpTypeBool
%27 = OpTypeInt 32 0
%28 = OpConstant %27 10
%29 = OpTypeArray %14 %28
%30 = OpTypePointer Function %29
%40 = OpConstant %14 9
%50 = OpConstant %14 1
%60 = OpConstant %27 11
%61 = OpTypeArray %14 %60
%62 = OpTypePointer Function %61
%4 = OpFunction %2 None %3
%5 = OpLabel
%136 = OpFunctionCall %2 %6
%137 = OpFunctionCall %2 %8
%138 = OpFunctionCall %2 %10
%139 = OpFunctionCall %2 %12
OpReturn
OpFunctionEnd
%6 = OpFunction %2 None %3
%7 = OpLabel
%16 = OpVariable %15 Function
%31 = OpVariable %30 Function
OpStore %16 %17
OpBranch %18
%18 = OpLabel
%140 = OpPhi %14 %17 %7 %51 %21
OpLoopMerge %20 %21 None
OpBranch %22
%22 = OpLabel
%26 = OpSLessThan %25 %140 %24
OpBranchConditional %26 %19 %20
%19 = OpLabel
%33 = OpAccessChain %15 %31 %140
%34 = OpLoad %14 %33
%35 = OpAccessChain %15 %31 %17
OpStore %35 %34
%37 = OpAccessChain %15 %31 %17
%38 = OpLoad %14 %37
%39 = OpAccessChain %15 %31 %140
OpStore %39 %38
%42 = OpAccessChain %15 %31 %140
%43 = OpLoad %14 %42
%44 = OpAccessChain %15 %31 %40
OpStore %44 %43
%46 = OpAccessChain %15 %31 %40
%47 = OpLoad %14 %46
%48 = OpAccessChain %15 %31 %140
OpStore %48 %47
OpBranch %21
%21 = OpLabel
%51 = OpIAdd %14 %140 %50
OpStore %16 %51
OpBranch %18
%20 = OpLabel
OpReturn
OpFunctionEnd
%8 = OpFunction %2 None %3
%9 = OpLabel
%52 = OpVariable %15 Function
%63 = OpVariable %62 Function
OpStore %52 %17
OpBranch %53
%53 = OpLabel
%141 = OpPhi %14 %17 %9 %81 %56
OpLoopMerge %55 %56 None
OpBranch %57
%57 = OpLabel
%59 = OpSLessThanEqual %25 %141 %24
OpBranchConditional %59 %54 %55
%54 = OpLabel
%65 = OpAccessChain %15 %63 %141
%66 = OpLoad %14 %65
%67 = OpAccessChain %15 %63 %17
OpStore %67 %66
%69 = OpAccessChain %15 %63 %17
%70 = OpLoad %14 %69
%71 = OpAccessChain %15 %63 %141
OpStore %71 %70
%73 = OpAccessChain %15 %63 %141
%74 = OpLoad %14 %73
%75 = OpAccessChain %15 %63 %24
OpStore %75 %74
%77 = OpAccessChain %15 %63 %24
%78 = OpLoad %14 %77
%79 = OpAccessChain %15 %63 %141
OpStore %79 %78
OpBranch %56
%56 = OpLabel
%81 = OpIAdd %14 %141 %50
OpStore %52 %81
OpBranch %53
%55 = OpLabel
OpReturn
OpFunctionEnd
%10 = OpFunction %2 None %3
%11 = OpLabel
%82 = OpVariable %15 Function
%90 = OpVariable %62 Function
OpStore %82 %24
OpBranch %83
%83 = OpLabel
%142 = OpPhi %14 %24 %11 %108 %86
OpLoopMerge %85 %86 None
OpBranch %87
%87 = OpLabel
%89 = OpSGreaterThan %25 %142 %17
OpBranchConditional %89 %84 %85
%84 = OpLabel
%92 = OpAccessChain %15 %90 %142
%93 = OpLoad %14 %92
%94 = OpAccessChain %15 %90 %24
OpStore %94 %93
%96 = OpAccessChain %15 %90 %24
%97 = OpLoad %14 %96
%98 = OpAccessChain %15 %90 %142
OpStore %98 %97
%100 = OpAccessChain %15 %90 %142
%101 = OpLoad %14 %100
%102 = OpAccessChain %15 %90 %50
OpStore %102 %101
%104 = OpAccessChain %15 %90 %50
%105 = OpLoad %14 %104
%106 = OpAccessChain %15 %90 %142
OpStore %106 %105
OpBranch %86
%86 = OpLabel
%108 = OpISub %14 %142 %50
OpStore %82 %108
OpBranch %83
%85 = OpLabel
OpReturn
OpFunctionEnd
%12 = OpFunction %2 None %3
%13 = OpLabel
%109 = OpVariable %15 Function
%117 = OpVariable %62 Function
OpStore %109 %24
OpBranch %110
%110 = OpLabel
%143 = OpPhi %14 %24 %13 %135 %113
OpLoopMerge %112 %113 None
OpBranch %114
%114 = OpLabel
%116 = OpSGreaterThanEqual %25 %143 %17
OpBranchConditional %116 %111 %112
%111 = OpLabel
%119 = OpAccessChain %15 %117 %143
%120 = OpLoad %14 %119
%121 = OpAccessChain %15 %117 %24
OpStore %121 %120
%123 = OpAccessChain %15 %117 %24
%124 = OpLoad %14 %123
%125 = OpAccessChain %15 %117 %143
OpStore %125 %124
%127 = OpAccessChain %15 %117 %143
%128 = OpLoad %14 %127
%129 = OpAccessChain %15 %117 %17
OpStore %129 %128
%131 = OpAccessChain %15 %117 %17
%132 = OpLoad %14 %131
%133 = OpAccessChain %15 %117 %143
OpStore %133 %132
OpBranch %113
%113 = OpLabel
%135 = OpISub %14 %143 %50
OpStore %109 %135
OpBranch %110
%112 = OpLabel
OpReturn
OpFunctionEnd
)";
std::unique_ptr<IRContext> context =
BuildModule(SPV_ENV_UNIVERSAL_1_1, nullptr, text,
SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
Module* module = context->module();
EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n"
<< text << std::endl;
// For the loop in function a
{
const Function* f = spvtest::GetFunction(module, 6);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store[4];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 19)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 4; ++i) {
EXPECT_TRUE(store[i]);
}
// Tests identifying peel first with weak zero with destination as zero
// index.
// 34 -> 35
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(34), store[0], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::PEEL);
EXPECT_TRUE(distance_vector.GetEntries()[0].peel_first);
}
// Tests identifying peel first with weak zero with source as zero index.
// 38 -> 39
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(38), store[1], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::PEEL);
EXPECT_TRUE(distance_vector.GetEntries()[0].peel_first);
}
// Tests identifying peel first with weak zero with destination as zero
// index.
// 43 -> 44
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(43), store[2], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::PEEL);
EXPECT_TRUE(distance_vector.GetEntries()[0].peel_last);
}
// Tests identifying peel first with weak zero with source as zero index.
// 47 -> 48
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(47), store[3], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::PEEL);
EXPECT_TRUE(distance_vector.GetEntries()[0].peel_last);
}
}
// For the loop in function b
{
const Function* f = spvtest::GetFunction(module, 8);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store[4];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 54)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 4; ++i) {
EXPECT_TRUE(store[i]);
}
// Tests identifying peel first with weak zero with destination as zero
// index.
// 66 -> 67
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(66), store[0], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::PEEL);
EXPECT_TRUE(distance_vector.GetEntries()[0].peel_first);
}
// Tests identifying peel first with weak zero with source as zero index.
// 70 -> 71
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(70), store[1], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::PEEL);
EXPECT_TRUE(distance_vector.GetEntries()[0].peel_first);
}
// Tests identifying peel first with weak zero with destination as zero
// index.
// 74 -> 75
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(74), store[2], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::PEEL);
EXPECT_TRUE(distance_vector.GetEntries()[0].peel_last);
}
// Tests identifying peel first with weak zero with source as zero index.
// 78 -> 79
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(78), store[3], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::PEEL);
EXPECT_TRUE(distance_vector.GetEntries()[0].peel_last);
}
}
// For the loop in function c
{
const Function* f = spvtest::GetFunction(module, 10);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store[4];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 84)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 4; ++i) {
EXPECT_TRUE(store[i]);
}
// Tests identifying peel first with weak zero with destination as zero
// index.
// 93 -> 94
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(93), store[0], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::PEEL);
EXPECT_TRUE(distance_vector.GetEntries()[0].peel_first);
}
// Tests identifying peel first with weak zero with source as zero index.
// 97 -> 98
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(97), store[1], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::PEEL);
EXPECT_TRUE(distance_vector.GetEntries()[0].peel_first);
}
// Tests identifying peel first with weak zero with destination as zero
// index.
// 101 -> 102
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(101), store[2], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::PEEL);
EXPECT_TRUE(distance_vector.GetEntries()[0].peel_last);
}
// Tests identifying peel first with weak zero with source as zero index.
// 105 -> 106
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(105), store[3], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::PEEL);
EXPECT_TRUE(distance_vector.GetEntries()[0].peel_last);
}
}
// For the loop in function d
{
const Function* f = spvtest::GetFunction(module, 12);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store[4];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 111)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 4; ++i) {
EXPECT_TRUE(store[i]);
}
// Tests identifying peel first with weak zero with destination as zero
// index.
// 120 -> 121
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(120), store[0], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::PEEL);
EXPECT_TRUE(distance_vector.GetEntries()[0].peel_first);
}
// Tests identifying peel first with weak zero with source as zero index.
// 124 -> 125
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(124), store[1], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::PEEL);
EXPECT_TRUE(distance_vector.GetEntries()[0].peel_first);
}
// Tests identifying peel first with weak zero with destination as zero
// index.
// 128 -> 129
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(128), store[2], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::PEEL);
EXPECT_TRUE(distance_vector.GetEntries()[0].peel_last);
}
// Tests identifying peel first with weak zero with source as zero index.
// 132 -> 133
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(132), store[3], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::PEEL);
EXPECT_TRUE(distance_vector.GetEntries()[0].peel_last);
}
}
}
/*
Generated from the following GLSL fragment shader
with --eliminate-local-multi-store
#version 440 core
void main(){
int[10][10] arr;
for (int i = 0; i < 10; i++) {
arr[i][i] = arr[i][i];
arr[0][i] = arr[1][i];
arr[1][i] = arr[0][i];
arr[i][0] = arr[i][1];
arr[i][1] = arr[i][0];
arr[0][1] = arr[1][0];
}
}
*/
TEST(DependencyAnalysis, MultipleSubscriptZIVSIV) {
const std::string text = R"( OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource GLSL 440
OpName %4 "main"
OpName %8 "i"
OpName %24 "arr"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%9 = OpConstant %6 0
%16 = OpConstant %6 10
%17 = OpTypeBool
%19 = OpTypeInt 32 0
%20 = OpConstant %19 10
%21 = OpTypeArray %6 %20
%22 = OpTypeArray %21 %20
%23 = OpTypePointer Function %22
%33 = OpConstant %6 1
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
%24 = OpVariable %23 Function
OpStore %8 %9
OpBranch %10
%10 = OpLabel
%58 = OpPhi %6 %9 %5 %57 %13
OpLoopMerge %12 %13 None
OpBranch %14
%14 = OpLabel
%18 = OpSLessThan %17 %58 %16
OpBranchConditional %18 %11 %12
%11 = OpLabel
%29 = OpAccessChain %7 %24 %58 %58
%30 = OpLoad %6 %29
%31 = OpAccessChain %7 %24 %58 %58
OpStore %31 %30
%35 = OpAccessChain %7 %24 %33 %58
%36 = OpLoad %6 %35
%37 = OpAccessChain %7 %24 %9 %58
OpStore %37 %36
%40 = OpAccessChain %7 %24 %9 %58
%41 = OpLoad %6 %40
%42 = OpAccessChain %7 %24 %33 %58
OpStore %42 %41
%45 = OpAccessChain %7 %24 %58 %33
%46 = OpLoad %6 %45
%47 = OpAccessChain %7 %24 %58 %9
OpStore %47 %46
%50 = OpAccessChain %7 %24 %58 %9
%51 = OpLoad %6 %50
%52 = OpAccessChain %7 %24 %58 %33
OpStore %52 %51
%53 = OpAccessChain %7 %24 %33 %9
%54 = OpLoad %6 %53
%55 = OpAccessChain %7 %24 %9 %33
OpStore %55 %54
OpBranch %13
%13 = OpLabel
%57 = OpIAdd %6 %58 %33
OpStore %8 %57
OpBranch %10
%12 = OpLabel
OpReturn
OpFunctionEnd
)";
std::unique_ptr<IRContext> context =
BuildModule(SPV_ENV_UNIVERSAL_1_1, nullptr, text,
SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
Module* module = context->module();
EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n"
<< text << std::endl;
const Function* f = spvtest::GetFunction(module, 4);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store[6];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 11)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 6; ++i) {
EXPECT_TRUE(store[i]);
}
// 30 -> 31
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(30),
store[0], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::DISTANCE);
EXPECT_EQ(distance_vector.GetEntries()[0].direction,
DistanceEntry::Directions::EQ);
EXPECT_EQ(distance_vector.GetEntries()[0].distance, 0);
}
// 36 -> 37
{
DistanceVector distance_vector{loops.size()};
EXPECT_TRUE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(36),
store[1], &distance_vector));
}
// 41 -> 42
{
DistanceVector distance_vector{loops.size()};
EXPECT_TRUE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(41),
store[2], &distance_vector));
}
// 46 -> 47
{
DistanceVector distance_vector{loops.size()};
EXPECT_TRUE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(46),
store[3], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::DISTANCE);
EXPECT_EQ(distance_vector.GetEntries()[0].direction,
DistanceEntry::Directions::EQ);
EXPECT_EQ(distance_vector.GetEntries()[0].distance, 0);
}
// 51 -> 52
{
DistanceVector distance_vector{loops.size()};
EXPECT_TRUE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(51),
store[4], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::DISTANCE);
EXPECT_EQ(distance_vector.GetEntries()[0].direction,
DistanceEntry::Directions::EQ);
EXPECT_EQ(distance_vector.GetEntries()[0].distance, 0);
}
// 54 -> 55
{
DistanceVector distance_vector{loops.size()};
EXPECT_TRUE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(54),
store[5], &distance_vector));
}
}
/*
Generated from the following GLSL fragment shader
with --eliminate-local-multi-store
#version 440 core
void a(){
int[10] arr;
for (int i = 0; i < 10; i++) {
for (int j = 0; j < 10; j++) {
arr[j] = arr[j];
}
}
}
void b(){
int[10] arr;
for (int i = 0; i < 10; i++) {
for (int j = 0; j < 10; j++) {
arr[i] = arr[i];
}
}
}
void main() {
a();
b();
}
*/
TEST(DependencyAnalysis, IrrelevantSubscripts) {
const std::string text = R"( OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource GLSL 440
OpName %4 "main"
OpName %6 "a("
OpName %8 "b("
OpName %12 "i"
OpName %23 "j"
OpName %35 "arr"
OpName %46 "i"
OpName %54 "j"
OpName %62 "arr"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%10 = OpTypeInt 32 1
%11 = OpTypePointer Function %10
%13 = OpConstant %10 0
%20 = OpConstant %10 10
%21 = OpTypeBool
%31 = OpTypeInt 32 0
%32 = OpConstant %31 10
%33 = OpTypeArray %10 %32
%34 = OpTypePointer Function %33
%42 = OpConstant %10 1
%4 = OpFunction %2 None %3
%5 = OpLabel
%72 = OpFunctionCall %2 %6
%73 = OpFunctionCall %2 %8
OpReturn
OpFunctionEnd
%6 = OpFunction %2 None %3
%7 = OpLabel
%12 = OpVariable %11 Function
%23 = OpVariable %11 Function
%35 = OpVariable %34 Function
OpStore %12 %13
OpBranch %14
%14 = OpLabel
%74 = OpPhi %10 %13 %7 %45 %17
OpLoopMerge %16 %17 None
OpBranch %18
%18 = OpLabel
%22 = OpSLessThan %21 %74 %20
OpBranchConditional %22 %15 %16
%15 = OpLabel
OpStore %23 %13
OpBranch %24
%24 = OpLabel
%75 = OpPhi %10 %13 %15 %43 %27
OpLoopMerge %26 %27 None
OpBranch %28
%28 = OpLabel
%30 = OpSLessThan %21 %75 %20
OpBranchConditional %30 %25 %26
%25 = OpLabel
%38 = OpAccessChain %11 %35 %75
%39 = OpLoad %10 %38
%40 = OpAccessChain %11 %35 %75
OpStore %40 %39
OpBranch %27
%27 = OpLabel
%43 = OpIAdd %10 %75 %42
OpStore %23 %43
OpBranch %24
%26 = OpLabel
OpBranch %17
%17 = OpLabel
%45 = OpIAdd %10 %74 %42
OpStore %12 %45
OpBranch %14
%16 = OpLabel
OpReturn
OpFunctionEnd
%8 = OpFunction %2 None %3
%9 = OpLabel
%46 = OpVariable %11 Function
%54 = OpVariable %11 Function
%62 = OpVariable %34 Function
OpStore %46 %13
OpBranch %47
%47 = OpLabel
%77 = OpPhi %10 %13 %9 %71 %50
OpLoopMerge %49 %50 None
OpBranch %51
%51 = OpLabel
%53 = OpSLessThan %21 %77 %20
OpBranchConditional %53 %48 %49
%48 = OpLabel
OpStore %54 %13
OpBranch %55
%55 = OpLabel
%78 = OpPhi %10 %13 %48 %69 %58
OpLoopMerge %57 %58 None
OpBranch %59
%59 = OpLabel
%61 = OpSLessThan %21 %78 %20
OpBranchConditional %61 %56 %57
%56 = OpLabel
%65 = OpAccessChain %11 %62 %77
%66 = OpLoad %10 %65
%67 = OpAccessChain %11 %62 %77
OpStore %67 %66
OpBranch %58
%58 = OpLabel
%69 = OpIAdd %10 %78 %42
OpStore %54 %69
OpBranch %55
%57 = OpLabel
OpBranch %50
%50 = OpLabel
%71 = OpIAdd %10 %77 %42
OpStore %46 %71
OpBranch %47
%49 = OpLabel
OpReturn
OpFunctionEnd
)";
std::unique_ptr<IRContext> context =
BuildModule(SPV_ENV_UNIVERSAL_1_1, nullptr, text,
SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
Module* module = context->module();
EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n"
<< text << std::endl;
// For the loop in function a
{
const Function* f = spvtest::GetFunction(module, 6);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
std::vector<const Loop*> loops{&ld.GetLoopByIndex(1),
&ld.GetLoopByIndex(0)};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store[1];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 25)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 1; ++i) {
EXPECT_TRUE(store[i]);
}
// 39 -> 40
{
DistanceVector distance_vector{loops.size()};
analysis.SetDebugStream(std::cout);
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(39), store[0], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::IRRELEVANT);
EXPECT_EQ(distance_vector.GetEntries()[1].dependence_information,
DistanceEntry::DependenceInformation::DISTANCE);
EXPECT_EQ(distance_vector.GetEntries()[1].distance, 0);
}
}
// For the loop in function b
{
const Function* f = spvtest::GetFunction(module, 8);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
std::vector<const Loop*> loops{&ld.GetLoopByIndex(1),
&ld.GetLoopByIndex(0)};
LoopDependenceAnalysis analysis{context.get(), loops};
const Instruction* store[1];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 56)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 1; ++i) {
EXPECT_TRUE(store[i]);
}
// 66 -> 67
{
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.GetDependence(
context->get_def_use_mgr()->GetDef(66), store[0], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::DISTANCE);
EXPECT_EQ(distance_vector.GetEntries()[0].distance, 0);
EXPECT_EQ(distance_vector.GetEntries()[1].dependence_information,
DistanceEntry::DependenceInformation::IRRELEVANT);
}
}
}
void CheckDependenceAndDirection(const Instruction* source,
const Instruction* destination,
bool expected_dependence,
DistanceVector expected_distance,
LoopDependenceAnalysis* analysis) {
DistanceVector dv_entry(2);
EXPECT_EQ(expected_dependence,
analysis->GetDependence(source, destination, &dv_entry));
EXPECT_EQ(expected_distance, dv_entry);
}
/*
Generated from the following GLSL fragment shader
with --eliminate-local-multi-store
#version 440 core
layout(location = 0) in vec4 c;
void main(){
int[10] arr;
int a = 2;
int b = 3;
int N = int(c.x);
for (int i = 0; i < 10; i++) {
for (int j = 2; j < 10; j++) {
arr[i] = arr[j]; // 0
arr[j] = arr[i]; // 1
arr[j-2] = arr[i+3]; // 2
arr[j-a] = arr[i+b]; // 3
arr[2*i] = arr[4*j+3]; // 4, independent
arr[2*i] = arr[4*j]; // 5
arr[i+j] = arr[i+j]; // 6
arr[10*i+j] = arr[10*i+j]; // 7
arr[10*i+10*j] = arr[10*i+10*j+3]; // 8, independent
arr[10*i+10*j] = arr[10*i+N*j+3]; // 9, bail out because of N coefficient
arr[10*i+10*j] = arr[10*i+10*j+N]; // 10, bail out because of N constant
// term
arr[10*i+N*j] = arr[10*i+10*j+3]; // 11, bail out because of N coefficient
arr[10*i+10*j+N] = arr[10*i+10*j]; // 12, bail out because of N constant
// term
arr[10*i] = arr[5*j]; // 13, independent
arr[5*i] = arr[10*j]; // 14, independent
arr[9*i] = arr[3*j]; // 15, independent
arr[3*i] = arr[9*j]; // 16, independent
}
}
}
*/
TEST(DependencyAnalysis, MIV) {
const std::string text = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main" %16
OpExecutionMode %4 OriginUpperLeft
OpSource GLSL 440
OpName %4 "main"
OpName %8 "a"
OpName %10 "b"
OpName %12 "N"
OpName %16 "c"
OpName %23 "i"
OpName %34 "j"
OpName %45 "arr"
OpDecorate %16 Location 0
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%9 = OpConstant %6 2
%11 = OpConstant %6 3
%13 = OpTypeFloat 32
%14 = OpTypeVector %13 4
%15 = OpTypePointer Input %14
%16 = OpVariable %15 Input
%17 = OpTypeInt 32 0
%18 = OpConstant %17 0
%19 = OpTypePointer Input %13
%24 = OpConstant %6 0
%31 = OpConstant %6 10
%32 = OpTypeBool
%42 = OpConstant %17 10
%43 = OpTypeArray %6 %42
%44 = OpTypePointer Function %43
%74 = OpConstant %6 4
%184 = OpConstant %6 5
%197 = OpConstant %6 9
%213 = OpConstant %6 1
%218 = OpUndef %6
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
%10 = OpVariable %7 Function
%12 = OpVariable %7 Function
%23 = OpVariable %7 Function
%34 = OpVariable %7 Function
%45 = OpVariable %44 Function
OpStore %8 %9
OpStore %10 %11
%20 = OpAccessChain %19 %16 %18
%21 = OpLoad %13 %20
%22 = OpConvertFToS %6 %21
OpStore %12 %22
OpStore %23 %24
OpBranch %25
%25 = OpLabel
%217 = OpPhi %6 %24 %5 %216 %28
%219 = OpPhi %6 %218 %5 %220 %28
OpLoopMerge %27 %28 None
OpBranch %29
%29 = OpLabel
%33 = OpSLessThan %32 %217 %31
OpBranchConditional %33 %26 %27
%26 = OpLabel
OpStore %34 %9
OpBranch %35
%35 = OpLabel
%220 = OpPhi %6 %9 %26 %214 %38
OpLoopMerge %37 %38 None
OpBranch %39
%39 = OpLabel
%41 = OpSLessThan %32 %220 %31
OpBranchConditional %41 %36 %37
%36 = OpLabel
%48 = OpAccessChain %7 %45 %220
%49 = OpLoad %6 %48
%50 = OpAccessChain %7 %45 %217
OpStore %50 %49
%53 = OpAccessChain %7 %45 %217
%54 = OpLoad %6 %53
%55 = OpAccessChain %7 %45 %220
OpStore %55 %54
%57 = OpISub %6 %220 %9
%59 = OpIAdd %6 %217 %11
%60 = OpAccessChain %7 %45 %59
%61 = OpLoad %6 %60
%62 = OpAccessChain %7 %45 %57
OpStore %62 %61
%65 = OpISub %6 %220 %9
%68 = OpIAdd %6 %217 %11
%69 = OpAccessChain %7 %45 %68
%70 = OpLoad %6 %69
%71 = OpAccessChain %7 %45 %65
OpStore %71 %70
%73 = OpIMul %6 %9 %217
%76 = OpIMul %6 %74 %220
%77 = OpIAdd %6 %76 %11
%78 = OpAccessChain %7 %45 %77
%79 = OpLoad %6 %78
%80 = OpAccessChain %7 %45 %73
OpStore %80 %79
%82 = OpIMul %6 %9 %217
%84 = OpIMul %6 %74 %220
%85 = OpAccessChain %7 %45 %84
%86 = OpLoad %6 %85
%87 = OpAccessChain %7 %45 %82
OpStore %87 %86
%90 = OpIAdd %6 %217 %220
%93 = OpIAdd %6 %217 %220
%94 = OpAccessChain %7 %45 %93
%95 = OpLoad %6 %94
%96 = OpAccessChain %7 %45 %90
OpStore %96 %95
%98 = OpIMul %6 %31 %217
%100 = OpIAdd %6 %98 %220
%102 = OpIMul %6 %31 %217
%104 = OpIAdd %6 %102 %220
%105 = OpAccessChain %7 %45 %104
%106 = OpLoad %6 %105
%107 = OpAccessChain %7 %45 %100
OpStore %107 %106
%109 = OpIMul %6 %31 %217
%111 = OpIMul %6 %31 %220
%112 = OpIAdd %6 %109 %111
%114 = OpIMul %6 %31 %217
%116 = OpIMul %6 %31 %220
%117 = OpIAdd %6 %114 %116
%118 = OpIAdd %6 %117 %11
%119 = OpAccessChain %7 %45 %118
%120 = OpLoad %6 %119
%121 = OpAccessChain %7 %45 %112
OpStore %121 %120
%123 = OpIMul %6 %31 %217
%125 = OpIMul %6 %31 %220
%126 = OpIAdd %6 %123 %125
%128 = OpIMul %6 %31 %217
%131 = OpIMul %6 %22 %220
%132 = OpIAdd %6 %128 %131
%133 = OpIAdd %6 %132 %11
%134 = OpAccessChain %7 %45 %133
%135 = OpLoad %6 %134
%136 = OpAccessChain %7 %45 %126
OpStore %136 %135
%138 = OpIMul %6 %31 %217
%140 = OpIMul %6 %31 %220
%141 = OpIAdd %6 %138 %140
%143 = OpIMul %6 %31 %217
%145 = OpIMul %6 %31 %220
%146 = OpIAdd %6 %143 %145
%148 = OpIAdd %6 %146 %22
%149 = OpAccessChain %7 %45 %148
%150 = OpLoad %6 %149
%151 = OpAccessChain %7 %45 %141
OpStore %151 %150
%153 = OpIMul %6 %31 %217
%156 = OpIMul %6 %22 %220
%157 = OpIAdd %6 %153 %156
%159 = OpIMul %6 %31 %217
%161 = OpIMul %6 %31 %220
%162 = OpIAdd %6 %159 %161
%163 = OpIAdd %6 %162 %11
%164 = OpAccessChain %7 %45 %163
%165 = OpLoad %6 %164
%166 = OpAccessChain %7 %45 %157
OpStore %166 %165
%168 = OpIMul %6 %31 %217
%170 = OpIMul %6 %31 %220
%171 = OpIAdd %6 %168 %170
%173 = OpIAdd %6 %171 %22
%175 = OpIMul %6 %31 %217
%177 = OpIMul %6 %31 %220
%178 = OpIAdd %6 %175 %177
%179 = OpAccessChain %7 %45 %178
%180 = OpLoad %6 %179
%181 = OpAccessChain %7 %45 %173
OpStore %181 %180
%183 = OpIMul %6 %31 %217
%186 = OpIMul %6 %184 %220
%187 = OpAccessChain %7 %45 %186
%188 = OpLoad %6 %187
%189 = OpAccessChain %7 %45 %183
OpStore %189 %188
%191 = OpIMul %6 %184 %217
%193 = OpIMul %6 %31 %220
%194 = OpAccessChain %7 %45 %193
%195 = OpLoad %6 %194
%196 = OpAccessChain %7 %45 %191
OpStore %196 %195
%199 = OpIMul %6 %197 %217
%201 = OpIMul %6 %11 %220
%202 = OpAccessChain %7 %45 %201
%203 = OpLoad %6 %202
%204 = OpAccessChain %7 %45 %199
OpStore %204 %203
%206 = OpIMul %6 %11 %217
%208 = OpIMul %6 %197 %220
%209 = OpAccessChain %7 %45 %208
%210 = OpLoad %6 %209
%211 = OpAccessChain %7 %45 %206
OpStore %211 %210
OpBranch %38
%38 = OpLabel
%214 = OpIAdd %6 %220 %213
OpStore %34 %214
OpBranch %35
%37 = OpLabel
OpBranch %28
%28 = OpLabel
%216 = OpIAdd %6 %217 %213
OpStore %23 %216
OpBranch %25
%27 = OpLabel
OpReturn
OpFunctionEnd
)";
std::unique_ptr<IRContext> context =
BuildModule(SPV_ENV_UNIVERSAL_1_1, nullptr, text,
SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
Module* module = context->module();
EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n"
<< text << std::endl;
const Function* f = spvtest::GetFunction(module, 4);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
std::vector<const Loop*> loops{&ld.GetLoopByIndex(0), &ld.GetLoopByIndex(1)};
LoopDependenceAnalysis analysis{context.get(), loops};
const int instructions_expected = 17;
const Instruction* store[instructions_expected];
const Instruction* load[instructions_expected];
int stores_found = 0;
int loads_found = 0;
int block_id = 36;
ASSERT_TRUE(spvtest::GetBasicBlock(f, block_id));
for (const Instruction& inst : *spvtest::GetBasicBlock(f, block_id)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store[stores_found] = &inst;
++stores_found;
}
if (inst.opcode() == SpvOp::SpvOpLoad) {
load[loads_found] = &inst;
++loads_found;
}
}
EXPECT_EQ(instructions_expected, stores_found);
EXPECT_EQ(instructions_expected, loads_found);
auto directions_all = DistanceEntry(DistanceEntry::Directions::ALL);
auto directions_none = DistanceEntry(DistanceEntry::Directions::NONE);
auto dependent = DistanceVector({directions_all, directions_all});
auto independent = DistanceVector({directions_none, directions_none});
CheckDependenceAndDirection(load[0], store[0], false, dependent, &analysis);
CheckDependenceAndDirection(load[1], store[1], false, dependent, &analysis);
CheckDependenceAndDirection(load[2], store[2], false, dependent, &analysis);
CheckDependenceAndDirection(load[3], store[3], false, dependent, &analysis);
CheckDependenceAndDirection(load[4], store[4], true, independent, &analysis);
CheckDependenceAndDirection(load[5], store[5], false, dependent, &analysis);
CheckDependenceAndDirection(load[6], store[6], false, dependent, &analysis);
CheckDependenceAndDirection(load[7], store[7], false, dependent, &analysis);
CheckDependenceAndDirection(load[8], store[8], true, independent, &analysis);
CheckDependenceAndDirection(load[9], store[9], false, dependent, &analysis);
CheckDependenceAndDirection(load[10], store[10], false, dependent, &analysis);
CheckDependenceAndDirection(load[11], store[11], false, dependent, &analysis);
CheckDependenceAndDirection(load[12], store[12], false, dependent, &analysis);
CheckDependenceAndDirection(load[13], store[13], true, independent,
&analysis);
CheckDependenceAndDirection(load[14], store[14], true, independent,
&analysis);
CheckDependenceAndDirection(load[15], store[15], true, independent,
&analysis);
CheckDependenceAndDirection(load[16], store[16], true, independent,
&analysis);
}
void PartitionSubscripts(const Instruction* instruction_0,
const Instruction* instruction_1,
LoopDependenceAnalysis* analysis,
std::vector<std::vector<int>> expected_ids) {
auto subscripts_0 = analysis->GetSubscripts(instruction_0);
auto subscripts_1 = analysis->GetSubscripts(instruction_1);
std::vector<std::set<std::pair<Instruction*, Instruction*>>>
expected_partition{};
for (const auto& partition : expected_ids) {
expected_partition.push_back(
std::set<std::pair<Instruction*, Instruction*>>{});
for (auto id : partition) {
expected_partition.back().insert({subscripts_0[id], subscripts_1[id]});
}
}
EXPECT_EQ(expected_partition,
analysis->PartitionSubscripts(subscripts_0, subscripts_1));
}
/*
Generated from the following GLSL fragment shader
with --eliminate-local-multi-store
#version 440 core
void main(){
int[10][10][10][10] arr;
for (int i = 0; i < 10; i++) {
for (int j = 0; j < 10; j++) {
for (int k = 0; k < 10; k++) {
for (int l = 0; l < 10; l++) {
arr[i][j][k][l] = arr[i][j][k][l]; // 0, all independent
arr[i][j][k][l] = arr[i][j][l][0]; // 1, last 2 coupled
arr[i][j][k][l] = arr[j][i][k][l]; // 2, first 2 coupled
arr[i][j][k][l] = arr[l][j][k][i]; // 3, first & last coupled
arr[i][j][k][l] = arr[i][k][j][l]; // 4, middle 2 coupled
arr[i+j][j][k][l] = arr[i][j][k][l]; // 5, first 2 coupled
arr[i+j+k][j][k][l] = arr[i][j][k][l]; // 6, first 3 coupled
arr[i+j+k+l][j][k][l] = arr[i][j][k][l]; // 7, all 4 coupled
arr[i][j][k][l] = arr[i][l][j][k]; // 8, last 3 coupled
arr[i][j-k][k][l] = arr[i][j][l][k]; // 9, last 3 coupled
arr[i][j][k][l] = arr[l][i][j][k]; // 10, all 4 coupled
arr[i][j][k][l] = arr[j][i][l][k]; // 11, 2 coupled partitions (i,j) &
(l&k)
arr[i][j][k][l] = arr[k][l][i][j]; // 12, 2 coupled partitions (i,k) &
(j&l)
}
}
}
}
}
*/
TEST(DependencyAnalysis, SubscriptPartitioning) {
const std::string text = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource GLSL 440
OpName %4 "main"
OpName %8 "i"
OpName %19 "j"
OpName %27 "k"
OpName %35 "l"
OpName %50 "arr"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%9 = OpConstant %6 0
%16 = OpConstant %6 10
%17 = OpTypeBool
%43 = OpTypeInt 32 0
%44 = OpConstant %43 10
%45 = OpTypeArray %6 %44
%46 = OpTypeArray %45 %44
%47 = OpTypeArray %46 %44
%48 = OpTypeArray %47 %44
%49 = OpTypePointer Function %48
%208 = OpConstant %6 1
%217 = OpUndef %6
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
%19 = OpVariable %7 Function
%27 = OpVariable %7 Function
%35 = OpVariable %7 Function
%50 = OpVariable %49 Function
OpStore %8 %9
OpBranch %10
%10 = OpLabel
%216 = OpPhi %6 %9 %5 %215 %13
%218 = OpPhi %6 %217 %5 %221 %13
%219 = OpPhi %6 %217 %5 %222 %13
%220 = OpPhi %6 %217 %5 %223 %13
OpLoopMerge %12 %13 None
OpBranch %14
%14 = OpLabel
%18 = OpSLessThan %17 %216 %16
OpBranchConditional %18 %11 %12
%11 = OpLabel
OpStore %19 %9
OpBranch %20
%20 = OpLabel
%221 = OpPhi %6 %9 %11 %213 %23
%222 = OpPhi %6 %219 %11 %224 %23
%223 = OpPhi %6 %220 %11 %225 %23
OpLoopMerge %22 %23 None
OpBranch %24
%24 = OpLabel
%26 = OpSLessThan %17 %221 %16
OpBranchConditional %26 %21 %22
%21 = OpLabel
OpStore %27 %9
OpBranch %28
%28 = OpLabel
%224 = OpPhi %6 %9 %21 %211 %31
%225 = OpPhi %6 %223 %21 %226 %31
OpLoopMerge %30 %31 None
OpBranch %32
%32 = OpLabel
%34 = OpSLessThan %17 %224 %16
OpBranchConditional %34 %29 %30
%29 = OpLabel
OpStore %35 %9
OpBranch %36
%36 = OpLabel
%226 = OpPhi %6 %9 %29 %209 %39
OpLoopMerge %38 %39 None
OpBranch %40
%40 = OpLabel
%42 = OpSLessThan %17 %226 %16
OpBranchConditional %42 %37 %38
%37 = OpLabel
%59 = OpAccessChain %7 %50 %216 %221 %224 %226
%60 = OpLoad %6 %59
%61 = OpAccessChain %7 %50 %216 %221 %224 %226
OpStore %61 %60
%69 = OpAccessChain %7 %50 %216 %221 %226 %9
%70 = OpLoad %6 %69
%71 = OpAccessChain %7 %50 %216 %221 %224 %226
OpStore %71 %70
%80 = OpAccessChain %7 %50 %221 %216 %224 %226
%81 = OpLoad %6 %80
%82 = OpAccessChain %7 %50 %216 %221 %224 %226
OpStore %82 %81
%91 = OpAccessChain %7 %50 %226 %221 %224 %216
%92 = OpLoad %6 %91
%93 = OpAccessChain %7 %50 %216 %221 %224 %226
OpStore %93 %92
%102 = OpAccessChain %7 %50 %216 %224 %221 %226
%103 = OpLoad %6 %102
%104 = OpAccessChain %7 %50 %216 %221 %224 %226
OpStore %104 %103
%107 = OpIAdd %6 %216 %221
%115 = OpAccessChain %7 %50 %216 %221 %224 %226
%116 = OpLoad %6 %115
%117 = OpAccessChain %7 %50 %107 %221 %224 %226
OpStore %117 %116
%120 = OpIAdd %6 %216 %221
%122 = OpIAdd %6 %120 %224
%130 = OpAccessChain %7 %50 %216 %221 %224 %226
%131 = OpLoad %6 %130
%132 = OpAccessChain %7 %50 %122 %221 %224 %226
OpStore %132 %131
%135 = OpIAdd %6 %216 %221
%137 = OpIAdd %6 %135 %224
%139 = OpIAdd %6 %137 %226
%147 = OpAccessChain %7 %50 %216 %221 %224 %226
%148 = OpLoad %6 %147
%149 = OpAccessChain %7 %50 %139 %221 %224 %226
OpStore %149 %148
%158 = OpAccessChain %7 %50 %216 %226 %221 %224
%159 = OpLoad %6 %158
%160 = OpAccessChain %7 %50 %216 %221 %224 %226
OpStore %160 %159
%164 = OpISub %6 %221 %224
%171 = OpAccessChain %7 %50 %216 %221 %226 %224
%172 = OpLoad %6 %171
%173 = OpAccessChain %7 %50 %216 %164 %224 %226
OpStore %173 %172
%182 = OpAccessChain %7 %50 %226 %216 %221 %224
%183 = OpLoad %6 %182
%184 = OpAccessChain %7 %50 %216 %221 %224 %226
OpStore %184 %183
%193 = OpAccessChain %7 %50 %221 %216 %226 %224
%194 = OpLoad %6 %193
%195 = OpAccessChain %7 %50 %216 %221 %224 %226
OpStore %195 %194
%204 = OpAccessChain %7 %50 %224 %226 %216 %221
%205 = OpLoad %6 %204
%206 = OpAccessChain %7 %50 %216 %221 %224 %226
OpStore %206 %205
OpBranch %39
%39 = OpLabel
%209 = OpIAdd %6 %226 %208
OpStore %35 %209
OpBranch %36
%38 = OpLabel
OpBranch %31
%31 = OpLabel
%211 = OpIAdd %6 %224 %208
OpStore %27 %211
OpBranch %28
%30 = OpLabel
OpBranch %23
%23 = OpLabel
%213 = OpIAdd %6 %221 %208
OpStore %19 %213
OpBranch %20
%22 = OpLabel
OpBranch %13
%13 = OpLabel
%215 = OpIAdd %6 %216 %208
OpStore %8 %215
OpBranch %10
%12 = OpLabel
OpReturn
OpFunctionEnd
)";
std::unique_ptr<IRContext> context =
BuildModule(SPV_ENV_UNIVERSAL_1_1, nullptr, text,
SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
Module* module = context->module();
EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n"
<< text << std::endl;
const Function* f = spvtest::GetFunction(module, 4);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
std::vector<const Loop*> loop_nest{
&ld.GetLoopByIndex(0), &ld.GetLoopByIndex(1), &ld.GetLoopByIndex(2),
&ld.GetLoopByIndex(3)};
LoopDependenceAnalysis analysis{context.get(), loop_nest};
const int instructions_expected = 13;
const Instruction* store[instructions_expected];
const Instruction* load[instructions_expected];
int stores_found = 0;
int loads_found = 0;
int block_id = 37;
ASSERT_TRUE(spvtest::GetBasicBlock(f, block_id));
for (const Instruction& inst : *spvtest::GetBasicBlock(f, block_id)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store[stores_found] = &inst;
++stores_found;
}
if (inst.opcode() == SpvOp::SpvOpLoad) {
load[loads_found] = &inst;
++loads_found;
}
}
EXPECT_EQ(instructions_expected, stores_found);
EXPECT_EQ(instructions_expected, loads_found);
PartitionSubscripts(load[0], store[0], &analysis, {{0}, {1}, {2}, {3}});
PartitionSubscripts(load[1], store[1], &analysis, {{0}, {1}, {2, 3}});
PartitionSubscripts(load[2], store[2], &analysis, {{0, 1}, {2}, {3}});
PartitionSubscripts(load[3], store[3], &analysis, {{0, 3}, {1}, {2}});
PartitionSubscripts(load[4], store[4], &analysis, {{0}, {1, 2}, {3}});
PartitionSubscripts(load[5], store[5], &analysis, {{0, 1}, {2}, {3}});
PartitionSubscripts(load[6], store[6], &analysis, {{0, 1, 2}, {3}});
PartitionSubscripts(load[7], store[7], &analysis, {{0, 1, 2, 3}});
PartitionSubscripts(load[8], store[8], &analysis, {{0}, {1, 2, 3}});
PartitionSubscripts(load[9], store[9], &analysis, {{0}, {1, 2, 3}});
PartitionSubscripts(load[10], store[10], &analysis, {{0, 1, 2, 3}});
PartitionSubscripts(load[11], store[11], &analysis, {{0, 1}, {2, 3}});
PartitionSubscripts(load[12], store[12], &analysis, {{0, 2}, {1, 3}});
}
/*
Generated from the following GLSL fragment shader
with --eliminate-local-multi-store
#version 440 core
void a() {
int[10][10] arr;
for (int i = 0; i < 10; ++i) {
for (int j = 0; j < 10; ++j) {
// Dependent, distance vector (1, -1)
arr[i+1][i+j] = arr[i][i+j];
}
}
}
void b() {
int[10][10] arr;
for (int i = 0; i < 10; ++i) {
// Independent
arr[i+1][i+2] = arr[i][i] + 2;
}
}
void c() {
int[10][10] arr;
for (int i = 0; i < 10; ++i) {
// Dependence point (1,2)
arr[i][i] = arr[1][i-1] + 2;
}
}
void d() {
int[10][10][10] arr;
for (int i = 0; i < 10; ++i) {
for (int j = 0; j < 10; ++j) {
for (int k = 0; k < 10; ++k) {
// Dependent, distance vector (1,1,-1)
arr[j-i][i+1][j+k] = arr[j-i][i][j+k];
}
}
}
}
void e() {
int[10][10] arr;
for (int i = 0; i < 10; ++i) {
for (int j = 0; j < 10; ++j) {
// Independent with GCD after propagation
arr[i][2*j+i] = arr[i][2*j-i+5];
}
}
}
void main(){
a();
b();
c();
d();
e();
}
*/
TEST(DependencyAnalysis, Delta) {
const std::string text = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource GLSL 440
OpName %4 "main"
OpName %6 "a("
OpName %8 "b("
OpName %10 "c("
OpName %12 "d("
OpName %14 "e("
OpName %18 "i"
OpName %29 "j"
OpName %42 "arr"
OpName %60 "i"
OpName %68 "arr"
OpName %82 "i"
OpName %90 "arr"
OpName %101 "i"
OpName %109 "j"
OpName %117 "k"
OpName %127 "arr"
OpName %152 "i"
OpName %160 "j"
OpName %168 "arr"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%16 = OpTypeInt 32 1
%17 = OpTypePointer Function %16
%19 = OpConstant %16 0
%26 = OpConstant %16 10
%27 = OpTypeBool
%37 = OpTypeInt 32 0
%38 = OpConstant %37 10
%39 = OpTypeArray %16 %38
%40 = OpTypeArray %39 %38
%41 = OpTypePointer Function %40
%44 = OpConstant %16 1
%72 = OpConstant %16 2
%125 = OpTypeArray %40 %38
%126 = OpTypePointer Function %125
%179 = OpConstant %16 5
%4 = OpFunction %2 None %3
%5 = OpLabel
%188 = OpFunctionCall %2 %6
%189 = OpFunctionCall %2 %8
%190 = OpFunctionCall %2 %10
%191 = OpFunctionCall %2 %12
%192 = OpFunctionCall %2 %14
OpReturn
OpFunctionEnd
%6 = OpFunction %2 None %3
%7 = OpLabel
%18 = OpVariable %17 Function
%29 = OpVariable %17 Function
%42 = OpVariable %41 Function
OpStore %18 %19
OpBranch %20
%20 = OpLabel
%193 = OpPhi %16 %19 %7 %59 %23
OpLoopMerge %22 %23 None
OpBranch %24
%24 = OpLabel
%28 = OpSLessThan %27 %193 %26
OpBranchConditional %28 %21 %22
%21 = OpLabel
OpStore %29 %19
OpBranch %30
%30 = OpLabel
%194 = OpPhi %16 %19 %21 %57 %33
OpLoopMerge %32 %33 None
OpBranch %34
%34 = OpLabel
%36 = OpSLessThan %27 %194 %26
OpBranchConditional %36 %31 %32
%31 = OpLabel
%45 = OpIAdd %16 %193 %44
%48 = OpIAdd %16 %193 %194
%52 = OpIAdd %16 %193 %194
%53 = OpAccessChain %17 %42 %193 %52
%54 = OpLoad %16 %53
%55 = OpAccessChain %17 %42 %45 %48
OpStore %55 %54
OpBranch %33
%33 = OpLabel
%57 = OpIAdd %16 %194 %44
OpStore %29 %57
OpBranch %30
%32 = OpLabel
OpBranch %23
%23 = OpLabel
%59 = OpIAdd %16 %193 %44
OpStore %18 %59
OpBranch %20
%22 = OpLabel
OpReturn
OpFunctionEnd
%8 = OpFunction %2 None %3
%9 = OpLabel
%60 = OpVariable %17 Function
%68 = OpVariable %41 Function
OpStore %60 %19
OpBranch %61
%61 = OpLabel
%196 = OpPhi %16 %19 %9 %81 %64
OpLoopMerge %63 %64 None
OpBranch %65
%65 = OpLabel
%67 = OpSLessThan %27 %196 %26
OpBranchConditional %67 %62 %63
%62 = OpLabel
%70 = OpIAdd %16 %196 %44
%73 = OpIAdd %16 %196 %72
%76 = OpAccessChain %17 %68 %196 %196
%77 = OpLoad %16 %76
%78 = OpIAdd %16 %77 %72
%79 = OpAccessChain %17 %68 %70 %73
OpStore %79 %78
OpBranch %64
%64 = OpLabel
%81 = OpIAdd %16 %196 %44
OpStore %60 %81
OpBranch %61
%63 = OpLabel
OpReturn
OpFunctionEnd
%10 = OpFunction %2 None %3
%11 = OpLabel
%82 = OpVariable %17 Function
%90 = OpVariable %41 Function
OpStore %82 %19
OpBranch %83
%83 = OpLabel
%197 = OpPhi %16 %19 %11 %100 %86
OpLoopMerge %85 %86 None
OpBranch %87
%87 = OpLabel
%89 = OpSLessThan %27 %197 %26
OpBranchConditional %89 %84 %85
%84 = OpLabel
%94 = OpISub %16 %197 %44
%95 = OpAccessChain %17 %90 %44 %94
%96 = OpLoad %16 %95
%97 = OpIAdd %16 %96 %72
%98 = OpAccessChain %17 %90 %197 %197
OpStore %98 %97
OpBranch %86
%86 = OpLabel
%100 = OpIAdd %16 %197 %44
OpStore %82 %100
OpBranch %83
%85 = OpLabel
OpReturn
OpFunctionEnd
%12 = OpFunction %2 None %3
%13 = OpLabel
%101 = OpVariable %17 Function
%109 = OpVariable %17 Function
%117 = OpVariable %17 Function
%127 = OpVariable %126 Function
OpStore %101 %19
OpBranch %102
%102 = OpLabel
%198 = OpPhi %16 %19 %13 %151 %105
OpLoopMerge %104 %105 None
OpBranch %106
%106 = OpLabel
%108 = OpSLessThan %27 %198 %26
OpBranchConditional %108 %103 %104
%103 = OpLabel
OpStore %109 %19
OpBranch %110
%110 = OpLabel
%199 = OpPhi %16 %19 %103 %149 %113
OpLoopMerge %112 %113 None
OpBranch %114
%114 = OpLabel
%116 = OpSLessThan %27 %199 %26
OpBranchConditional %116 %111 %112
%111 = OpLabel
OpStore %117 %19
OpBranch %118
%118 = OpLabel
%201 = OpPhi %16 %19 %111 %147 %121
OpLoopMerge %120 %121 None
OpBranch %122
%122 = OpLabel
%124 = OpSLessThan %27 %201 %26
OpBranchConditional %124 %119 %120
%119 = OpLabel
%130 = OpISub %16 %199 %198
%132 = OpIAdd %16 %198 %44
%135 = OpIAdd %16 %199 %201
%138 = OpISub %16 %199 %198
%142 = OpIAdd %16 %199 %201
%143 = OpAccessChain %17 %127 %138 %198 %142
%144 = OpLoad %16 %143
%145 = OpAccessChain %17 %127 %130 %132 %135
OpStore %145 %144
OpBranch %121
%121 = OpLabel
%147 = OpIAdd %16 %201 %44
OpStore %117 %147
OpBranch %118
%120 = OpLabel
OpBranch %113
%113 = OpLabel
%149 = OpIAdd %16 %199 %44
OpStore %109 %149
OpBranch %110
%112 = OpLabel
OpBranch %105
%105 = OpLabel
%151 = OpIAdd %16 %198 %44
OpStore %101 %151
OpBranch %102
%104 = OpLabel
OpReturn
OpFunctionEnd
%14 = OpFunction %2 None %3
%15 = OpLabel
%152 = OpVariable %17 Function
%160 = OpVariable %17 Function
%168 = OpVariable %41 Function
OpStore %152 %19
OpBranch %153
%153 = OpLabel
%204 = OpPhi %16 %19 %15 %187 %156
OpLoopMerge %155 %156 None
OpBranch %157
%157 = OpLabel
%159 = OpSLessThan %27 %204 %26
OpBranchConditional %159 %154 %155
%154 = OpLabel
OpStore %160 %19
OpBranch %161
%161 = OpLabel
%205 = OpPhi %16 %19 %154 %185 %164
OpLoopMerge %163 %164 None
OpBranch %165
%165 = OpLabel
%167 = OpSLessThan %27 %205 %26
OpBranchConditional %167 %162 %163
%162 = OpLabel
%171 = OpIMul %16 %72 %205
%173 = OpIAdd %16 %171 %204
%176 = OpIMul %16 %72 %205
%178 = OpISub %16 %176 %204
%180 = OpIAdd %16 %178 %179
%181 = OpAccessChain %17 %168 %204 %180
%182 = OpLoad %16 %181
%183 = OpAccessChain %17 %168 %204 %173
OpStore %183 %182
OpBranch %164
%164 = OpLabel
%185 = OpIAdd %16 %205 %44
OpStore %160 %185
OpBranch %161
%163 = OpLabel
OpBranch %156
%156 = OpLabel
%187 = OpIAdd %16 %204 %44
OpStore %152 %187
OpBranch %153
%155 = OpLabel
OpReturn
OpFunctionEnd
)";
std::unique_ptr<IRContext> context =
BuildModule(SPV_ENV_UNIVERSAL_1_1, nullptr, text,
SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
ASSERT_NE(nullptr, context);
Module* module = context->module();
EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n"
<< text << std::endl;
{
const Function* f = spvtest::GetFunction(module, 6);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
const Instruction* store = nullptr;
const Instruction* load = nullptr;
int block_id = 31;
ASSERT_TRUE(spvtest::GetBasicBlock(f, block_id));
for (const Instruction& inst : *spvtest::GetBasicBlock(f, block_id)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store = &inst;
}
if (inst.opcode() == SpvOp::SpvOpLoad) {
load = &inst;
}
}
EXPECT_NE(nullptr, store);
EXPECT_NE(nullptr, load);
std::vector<const Loop*> loop_nest{&ld.GetLoopByIndex(0),
&ld.GetLoopByIndex(1)};
LoopDependenceAnalysis analysis{context.get(), loop_nest};
DistanceVector dv_entry(loop_nest.size());
std::vector<DistanceEntry> expected_entries{
DistanceEntry(DistanceEntry::Directions::LT, 1),
DistanceEntry(DistanceEntry::Directions::LT, 1)};
DistanceVector expected_distance_vector(expected_entries);
auto is_independent = analysis.GetDependence(load, store, &dv_entry);
EXPECT_FALSE(is_independent);
EXPECT_EQ(expected_distance_vector, dv_entry);
}
{
const Function* f = spvtest::GetFunction(module, 8);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
const Instruction* store = nullptr;
const Instruction* load = nullptr;
int block_id = 62;
ASSERT_TRUE(spvtest::GetBasicBlock(f, block_id));
for (const Instruction& inst : *spvtest::GetBasicBlock(f, block_id)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store = &inst;
}
if (inst.opcode() == SpvOp::SpvOpLoad) {
load = &inst;
}
}
EXPECT_NE(nullptr, store);
EXPECT_NE(nullptr, load);
std::vector<const Loop*> loop_nest{&ld.GetLoopByIndex(0)};
LoopDependenceAnalysis analysis{context.get(), loop_nest};
DistanceVector dv_entry(loop_nest.size());
auto is_independent = analysis.GetDependence(load, store, &dv_entry);
EXPECT_TRUE(is_independent);
}
{
const Function* f = spvtest::GetFunction(module, 10);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
const Instruction* store = nullptr;
const Instruction* load = nullptr;
int block_id = 84;
ASSERT_TRUE(spvtest::GetBasicBlock(f, block_id));
for (const Instruction& inst : *spvtest::GetBasicBlock(f, block_id)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store = &inst;
}
if (inst.opcode() == SpvOp::SpvOpLoad) {
load = &inst;
}
}
EXPECT_NE(nullptr, store);
EXPECT_NE(nullptr, load);
std::vector<const Loop*> loop_nest{&ld.GetLoopByIndex(0)};
LoopDependenceAnalysis analysis{context.get(), loop_nest};
DistanceVector dv_entry(loop_nest.size());
auto is_independent = analysis.GetDependence(load, store, &dv_entry);
DistanceVector expected_distance_vector({DistanceEntry(1, 2)});
EXPECT_FALSE(is_independent);
EXPECT_EQ(expected_distance_vector, dv_entry);
}
{
const Function* f = spvtest::GetFunction(module, 12);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
const Instruction* store = nullptr;
const Instruction* load = nullptr;
int block_id = 119;
ASSERT_TRUE(spvtest::GetBasicBlock(f, block_id));
for (const Instruction& inst : *spvtest::GetBasicBlock(f, block_id)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store = &inst;
}
if (inst.opcode() == SpvOp::SpvOpLoad) {
load = &inst;
}
}
EXPECT_NE(nullptr, store);
EXPECT_NE(nullptr, load);
std::vector<const Loop*> loop_nest{
&ld.GetLoopByIndex(0), &ld.GetLoopByIndex(1), &ld.GetLoopByIndex(2)};
LoopDependenceAnalysis analysis{context.get(), loop_nest};
DistanceVector dv_entry(loop_nest.size());
std::vector<DistanceEntry> expected_entries{
DistanceEntry(DistanceEntry::Directions::LT, 1),
DistanceEntry(DistanceEntry::Directions::LT, 1),
DistanceEntry(DistanceEntry::Directions::GT, -1)};
DistanceVector expected_distance_vector(expected_entries);
auto is_independent = analysis.GetDependence(store, load, &dv_entry);
EXPECT_FALSE(is_independent);
EXPECT_EQ(expected_distance_vector, dv_entry);
}
{
const Function* f = spvtest::GetFunction(module, 14);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
const Instruction* store = nullptr;
const Instruction* load = nullptr;
int block_id = 162;
ASSERT_TRUE(spvtest::GetBasicBlock(f, block_id));
for (const Instruction& inst : *spvtest::GetBasicBlock(f, block_id)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store = &inst;
}
if (inst.opcode() == SpvOp::SpvOpLoad) {
load = &inst;
}
}
EXPECT_NE(nullptr, store);
EXPECT_NE(nullptr, load);
std::vector<const Loop*> loop_nest{&ld.GetLoopByIndex(0),
&ld.GetLoopByIndex(1)};
LoopDependenceAnalysis analysis{context.get(), loop_nest};
DistanceVector dv_entry(loop_nest.size());
auto is_independent = analysis.GetDependence(load, store, &dv_entry);
EXPECT_TRUE(is_independent);
}
}
TEST(DependencyAnalysis, ConstraintIntersection) {
LoopDependenceAnalysis analysis{nullptr, std::vector<const Loop*>{}};
auto scalar_evolution = analysis.GetScalarEvolution();
{
// One is none. Other should be returned
auto none = analysis.make_constraint<DependenceNone>();
auto x = scalar_evolution->CreateConstant(1);
auto y = scalar_evolution->CreateConstant(10);
auto point = analysis.make_constraint<DependencePoint>(x, y, nullptr);
auto ret_0 = analysis.IntersectConstraints(none, point, nullptr, nullptr);
auto ret_point_0 = ret_0->AsDependencePoint();
ASSERT_NE(nullptr, ret_point_0);
EXPECT_EQ(*x, *ret_point_0->GetSource());
EXPECT_EQ(*y, *ret_point_0->GetDestination());
auto ret_1 = analysis.IntersectConstraints(point, none, nullptr, nullptr);
auto ret_point_1 = ret_1->AsDependencePoint();
ASSERT_NE(nullptr, ret_point_1);
EXPECT_EQ(*x, *ret_point_1->GetSource());
EXPECT_EQ(*y, *ret_point_1->GetDestination());
}
{
// Both distances
auto x = scalar_evolution->CreateConstant(1);
auto y = scalar_evolution->CreateConstant(10);
auto distance_0 = analysis.make_constraint<DependenceDistance>(x, nullptr);
auto distance_1 = analysis.make_constraint<DependenceDistance>(y, nullptr);
// Equal distances
auto ret_0 =
analysis.IntersectConstraints(distance_1, distance_1, nullptr, nullptr);
auto ret_distance = ret_0->AsDependenceDistance();
ASSERT_NE(nullptr, ret_distance);
EXPECT_EQ(*y, *ret_distance->GetDistance());
// Non-equal distances
auto ret_1 =
analysis.IntersectConstraints(distance_0, distance_1, nullptr, nullptr);
EXPECT_NE(nullptr, ret_1->AsDependenceEmpty());
}
{
// Both points
auto x = scalar_evolution->CreateConstant(1);
auto y = scalar_evolution->CreateConstant(10);
auto point_0 = analysis.make_constraint<DependencePoint>(x, y, nullptr);
auto point_1 = analysis.make_constraint<DependencePoint>(x, y, nullptr);
auto point_2 = analysis.make_constraint<DependencePoint>(y, y, nullptr);
// Equal points
auto ret_0 =
analysis.IntersectConstraints(point_0, point_1, nullptr, nullptr);
auto ret_point_0 = ret_0->AsDependencePoint();
ASSERT_NE(nullptr, ret_point_0);
EXPECT_EQ(*x, *ret_point_0->GetSource());
EXPECT_EQ(*y, *ret_point_0->GetDestination());
// Non-equal points
auto ret_1 =
analysis.IntersectConstraints(point_0, point_2, nullptr, nullptr);
EXPECT_NE(nullptr, ret_1->AsDependenceEmpty());
}
{
// Both lines, parallel
auto a0 = scalar_evolution->CreateConstant(3);
auto b0 = scalar_evolution->CreateConstant(6);
auto c0 = scalar_evolution->CreateConstant(9);
auto a1 = scalar_evolution->CreateConstant(6);
auto b1 = scalar_evolution->CreateConstant(12);
auto c1 = scalar_evolution->CreateConstant(18);
auto line_0 = analysis.make_constraint<DependenceLine>(a0, b0, c0, nullptr);
auto line_1 = analysis.make_constraint<DependenceLine>(a1, b1, c1, nullptr);
// Same line, both ways
auto ret_0 =
analysis.IntersectConstraints(line_0, line_1, nullptr, nullptr);
auto ret_1 =
analysis.IntersectConstraints(line_1, line_0, nullptr, nullptr);
auto ret_line_0 = ret_0->AsDependenceLine();
auto ret_line_1 = ret_1->AsDependenceLine();
EXPECT_NE(nullptr, ret_line_0);
EXPECT_NE(nullptr, ret_line_1);
// Non-intersecting parallel lines
auto c2 = scalar_evolution->CreateConstant(12);
auto line_2 = analysis.make_constraint<DependenceLine>(a1, b1, c2, nullptr);
auto ret_2 =
analysis.IntersectConstraints(line_0, line_2, nullptr, nullptr);
auto ret_3 =
analysis.IntersectConstraints(line_2, line_0, nullptr, nullptr);
EXPECT_NE(nullptr, ret_2->AsDependenceEmpty());
EXPECT_NE(nullptr, ret_3->AsDependenceEmpty());
auto c3 = scalar_evolution->CreateConstant(20);
auto line_3 = analysis.make_constraint<DependenceLine>(a1, b1, c3, nullptr);
auto ret_4 =
analysis.IntersectConstraints(line_0, line_3, nullptr, nullptr);
auto ret_5 =
analysis.IntersectConstraints(line_3, line_0, nullptr, nullptr);
EXPECT_NE(nullptr, ret_4->AsDependenceEmpty());
EXPECT_NE(nullptr, ret_5->AsDependenceEmpty());
}
{
// Non-constant line
auto unknown = scalar_evolution->CreateCantComputeNode();
auto constant = scalar_evolution->CreateConstant(10);
auto line_0 = analysis.make_constraint<DependenceLine>(constant, constant,
constant, nullptr);
auto line_1 = analysis.make_constraint<DependenceLine>(unknown, unknown,
unknown, nullptr);
auto ret_0 =
analysis.IntersectConstraints(line_0, line_1, nullptr, nullptr);
auto ret_1 =
analysis.IntersectConstraints(line_1, line_0, nullptr, nullptr);
EXPECT_NE(nullptr, ret_0->AsDependenceNone());
EXPECT_NE(nullptr, ret_1->AsDependenceNone());
}
{
auto bound_0 = scalar_evolution->CreateConstant(0);
auto bound_1 = scalar_evolution->CreateConstant(20);
auto a0 = scalar_evolution->CreateConstant(1);
auto b0 = scalar_evolution->CreateConstant(2);
auto c0 = scalar_evolution->CreateConstant(6);
auto a1 = scalar_evolution->CreateConstant(-1);
auto b1 = scalar_evolution->CreateConstant(2);
auto c1 = scalar_evolution->CreateConstant(2);
auto line_0 = analysis.make_constraint<DependenceLine>(a0, b0, c0, nullptr);
auto line_1 = analysis.make_constraint<DependenceLine>(a1, b1, c1, nullptr);
// Intersecting lines, has integer solution, in bounds
auto ret_0 =
analysis.IntersectConstraints(line_0, line_1, bound_0, bound_1);
auto ret_1 =
analysis.IntersectConstraints(line_1, line_0, bound_0, bound_1);
auto ret_point_0 = ret_0->AsDependencePoint();
auto ret_point_1 = ret_1->AsDependencePoint();
EXPECT_NE(nullptr, ret_point_0);
EXPECT_NE(nullptr, ret_point_1);
auto const_2 = scalar_evolution->CreateConstant(2);
EXPECT_EQ(*const_2, *ret_point_0->GetSource());
EXPECT_EQ(*const_2, *ret_point_0->GetDestination());
EXPECT_EQ(*const_2, *ret_point_1->GetSource());
EXPECT_EQ(*const_2, *ret_point_1->GetDestination());
// Intersecting lines, has integer solution, out of bounds
auto ret_2 =
analysis.IntersectConstraints(line_0, line_1, bound_0, bound_0);
auto ret_3 =
analysis.IntersectConstraints(line_1, line_0, bound_0, bound_0);
EXPECT_NE(nullptr, ret_2->AsDependenceEmpty());
EXPECT_NE(nullptr, ret_3->AsDependenceEmpty());
auto a2 = scalar_evolution->CreateConstant(-4);
auto b2 = scalar_evolution->CreateConstant(1);
auto c2 = scalar_evolution->CreateConstant(0);
auto a3 = scalar_evolution->CreateConstant(4);
auto b3 = scalar_evolution->CreateConstant(1);
auto c3 = scalar_evolution->CreateConstant(4);
auto line_2 = analysis.make_constraint<DependenceLine>(a2, b2, c2, nullptr);
auto line_3 = analysis.make_constraint<DependenceLine>(a3, b3, c3, nullptr);
// Intersecting, no integer solution
auto ret_4 =
analysis.IntersectConstraints(line_2, line_3, bound_0, bound_1);
auto ret_5 =
analysis.IntersectConstraints(line_3, line_2, bound_0, bound_1);
EXPECT_NE(nullptr, ret_4->AsDependenceEmpty());
EXPECT_NE(nullptr, ret_5->AsDependenceEmpty());
auto unknown = scalar_evolution->CreateCantComputeNode();
// Non-constant bound
auto ret_6 =
analysis.IntersectConstraints(line_0, line_1, unknown, bound_1);
auto ret_7 =
analysis.IntersectConstraints(line_1, line_0, bound_0, unknown);
EXPECT_NE(nullptr, ret_6->AsDependenceNone());
EXPECT_NE(nullptr, ret_7->AsDependenceNone());
}
{
auto constant_0 = scalar_evolution->CreateConstant(0);
auto constant_1 = scalar_evolution->CreateConstant(1);
auto constant_neg_1 = scalar_evolution->CreateConstant(-1);
auto constant_2 = scalar_evolution->CreateConstant(2);
auto constant_neg_2 = scalar_evolution->CreateConstant(-2);
auto point_0_0 = analysis.make_constraint<DependencePoint>(
constant_0, constant_0, nullptr);
auto point_0_1 = analysis.make_constraint<DependencePoint>(
constant_0, constant_1, nullptr);
auto point_1_0 = analysis.make_constraint<DependencePoint>(
constant_1, constant_0, nullptr);
auto point_1_1 = analysis.make_constraint<DependencePoint>(
constant_1, constant_1, nullptr);
auto point_1_2 = analysis.make_constraint<DependencePoint>(
constant_1, constant_2, nullptr);
auto point_1_neg_1 = analysis.make_constraint<DependencePoint>(
constant_1, constant_neg_1, nullptr);
auto point_neg_1_1 = analysis.make_constraint<DependencePoint>(
constant_neg_1, constant_1, nullptr);
auto line_y_0 = analysis.make_constraint<DependenceLine>(
constant_0, constant_1, constant_0, nullptr);
auto line_y_1 = analysis.make_constraint<DependenceLine>(
constant_0, constant_1, constant_1, nullptr);
auto line_y_2 = analysis.make_constraint<DependenceLine>(
constant_0, constant_1, constant_2, nullptr);
// Parallel horizontal lines, y = 0 & y = 1, should return no intersection
auto ret =
analysis.IntersectConstraints(line_y_0, line_y_1, nullptr, nullptr);
EXPECT_NE(nullptr, ret->AsDependenceEmpty());
// Parallel horizontal lines, y = 1 & y = 2, should return no intersection
auto ret_y_12 =
analysis.IntersectConstraints(line_y_1, line_y_2, nullptr, nullptr);
EXPECT_NE(nullptr, ret_y_12->AsDependenceEmpty());
// Same horizontal lines, y = 0 & y = 0, should return the line
auto ret_y_same_0 =
analysis.IntersectConstraints(line_y_0, line_y_0, nullptr, nullptr);
EXPECT_NE(nullptr, ret_y_same_0->AsDependenceLine());
// Same horizontal lines, y = 1 & y = 1, should return the line
auto ret_y_same_1 =
analysis.IntersectConstraints(line_y_1, line_y_1, nullptr, nullptr);
EXPECT_NE(nullptr, ret_y_same_1->AsDependenceLine());
auto line_x_0 = analysis.make_constraint<DependenceLine>(
constant_1, constant_0, constant_0, nullptr);
auto line_x_1 = analysis.make_constraint<DependenceLine>(
constant_1, constant_0, constant_1, nullptr);
auto line_x_2 = analysis.make_constraint<DependenceLine>(
constant_1, constant_0, constant_2, nullptr);
auto line_2x_1 = analysis.make_constraint<DependenceLine>(
constant_2, constant_0, constant_1, nullptr);
auto line_2x_2 = analysis.make_constraint<DependenceLine>(
constant_2, constant_0, constant_2, nullptr);
// Parallel vertical lines, x = 0 & x = 1, should return no intersection
auto ret_x =
analysis.IntersectConstraints(line_x_0, line_x_1, nullptr, nullptr);
EXPECT_NE(nullptr, ret_x->AsDependenceEmpty());
// Parallel vertical lines, x = 1 & x = 2, should return no intersection
auto ret_x_12 =
analysis.IntersectConstraints(line_x_1, line_x_2, nullptr, nullptr);
EXPECT_NE(nullptr, ret_x_12->AsDependenceEmpty());
// Parallel vertical lines, 2x = 1 & 2x = 2, should return no intersection
auto ret_2x_2_2x_1 =
analysis.IntersectConstraints(line_2x_2, line_2x_1, nullptr, nullptr);
EXPECT_NE(nullptr, ret_2x_2_2x_1->AsDependenceEmpty());
// same line, 2x=2 & x = 1
auto ret_2x_2_x_1 =
analysis.IntersectConstraints(line_2x_2, line_x_1, nullptr, nullptr);
EXPECT_NE(nullptr, ret_2x_2_x_1->AsDependenceLine());
// Same vertical lines, x = 0 & x = 0, should return the line
auto ret_x_same_0 =
analysis.IntersectConstraints(line_x_0, line_x_0, nullptr, nullptr);
EXPECT_NE(nullptr, ret_x_same_0->AsDependenceLine());
// EXPECT_EQ(*line_x_0, *ret_x_same_0->AsDependenceLine());
// Same vertical lines, x = 1 & x = 1, should return the line
auto ret_x_same_1 =
analysis.IntersectConstraints(line_x_1, line_x_1, nullptr, nullptr);
EXPECT_NE(nullptr, ret_x_same_1->AsDependenceLine());
EXPECT_EQ(*line_x_1, *ret_x_same_1->AsDependenceLine());
// x=1 & y = 0, intersect at (1, 0)
auto ret_1_0 = analysis.IntersectConstraints(line_x_1, line_y_0,
constant_neg_1, constant_2);
auto ret_point_1_0 = ret_1_0->AsDependencePoint();
EXPECT_NE(nullptr, ret_point_1_0);
EXPECT_EQ(*point_1_0, *ret_point_1_0);
// x=1 & y = 1, intersect at (1, 1)
auto ret_1_1 = analysis.IntersectConstraints(line_x_1, line_y_1,
constant_neg_1, constant_2);
auto ret_point_1_1 = ret_1_1->AsDependencePoint();
EXPECT_NE(nullptr, ret_point_1_1);
EXPECT_EQ(*point_1_1, *ret_point_1_1);
// x=0 & y = 0, intersect at (0, 0)
auto ret_0_0 = analysis.IntersectConstraints(line_x_0, line_y_0,
constant_neg_1, constant_2);
auto ret_point_0_0 = ret_0_0->AsDependencePoint();
EXPECT_NE(nullptr, ret_point_0_0);
EXPECT_EQ(*point_0_0, *ret_point_0_0);
// x=0 & y = 1, intersect at (0, 1)
auto ret_0_1 = analysis.IntersectConstraints(line_x_0, line_y_1,
constant_neg_1, constant_2);
auto ret_point_0_1 = ret_0_1->AsDependencePoint();
EXPECT_NE(nullptr, ret_point_0_1);
EXPECT_EQ(*point_0_1, *ret_point_0_1);
// x = 1 & y = 2
auto ret_1_2 = analysis.IntersectConstraints(line_x_1, line_y_2,
constant_neg_1, constant_2);
auto ret_point_1_2 = ret_1_2->AsDependencePoint();
EXPECT_NE(nullptr, ret_point_1_2);
EXPECT_EQ(*point_1_2, *ret_point_1_2);
auto line_x_y_0 = analysis.make_constraint<DependenceLine>(
constant_1, constant_1, constant_0, nullptr);
auto line_x_y_1 = analysis.make_constraint<DependenceLine>(
constant_1, constant_1, constant_1, nullptr);
// x+y=0 & x=0, intersect (0, 0)
auto ret_xy_0_x_0 = analysis.IntersectConstraints(
line_x_y_0, line_x_0, constant_neg_1, constant_2);
EXPECT_NE(nullptr, ret_xy_0_x_0->AsDependencePoint());
EXPECT_EQ(*point_0_0, *ret_xy_0_x_0);
// x+y=0 & y=0, intersect (0, 0)
auto ret_xy_0_y_0 = analysis.IntersectConstraints(
line_x_y_0, line_y_0, constant_neg_1, constant_2);
EXPECT_NE(nullptr, ret_xy_0_y_0->AsDependencePoint());
EXPECT_EQ(*point_0_0, *ret_xy_0_y_0);
// x+y=0 & x=1, intersect (1, -1)
auto ret_xy_0_x_1 = analysis.IntersectConstraints(
line_x_y_0, line_x_1, constant_neg_2, constant_2);
EXPECT_NE(nullptr, ret_xy_0_x_1->AsDependencePoint());
EXPECT_EQ(*point_1_neg_1, *ret_xy_0_x_1);
// x+y=0 & y=1, intersect (-1, 1)
auto ret_xy_0_y_1 = analysis.IntersectConstraints(
line_x_y_0, line_y_1, constant_neg_2, constant_2);
EXPECT_NE(nullptr, ret_xy_0_y_1->AsDependencePoint());
EXPECT_EQ(*point_neg_1_1, *ret_xy_0_y_1);
// x=0 & x+y=0, intersect (0, 0)
auto ret_x_0_xy_0 = analysis.IntersectConstraints(
line_x_0, line_x_y_0, constant_neg_1, constant_2);
EXPECT_NE(nullptr, ret_x_0_xy_0->AsDependencePoint());
EXPECT_EQ(*point_0_0, *ret_x_0_xy_0);
// y=0 & x+y=0, intersect (0, 0)
auto ret_y_0_xy_0 = analysis.IntersectConstraints(
line_y_0, line_x_y_0, constant_neg_1, constant_2);
EXPECT_NE(nullptr, ret_y_0_xy_0->AsDependencePoint());
EXPECT_EQ(*point_0_0, *ret_y_0_xy_0);
// x=1 & x+y=0, intersect (1, -1)
auto ret_x_1_xy_0 = analysis.IntersectConstraints(
line_x_1, line_x_y_0, constant_neg_2, constant_2);
EXPECT_NE(nullptr, ret_x_1_xy_0->AsDependencePoint());
EXPECT_EQ(*point_1_neg_1, *ret_x_1_xy_0);
// y=1 & x+y=0, intersect (-1, 1)
auto ret_y_1_xy_0 = analysis.IntersectConstraints(
line_y_1, line_x_y_0, constant_neg_2, constant_2);
EXPECT_NE(nullptr, ret_y_1_xy_0->AsDependencePoint());
EXPECT_EQ(*point_neg_1_1, *ret_y_1_xy_0);
// x+y=1 & x=0, intersect (0, 1)
auto ret_xy_1_x_0 = analysis.IntersectConstraints(
line_x_y_1, line_x_0, constant_neg_1, constant_2);
EXPECT_NE(nullptr, ret_xy_1_x_0->AsDependencePoint());
EXPECT_EQ(*point_0_1, *ret_xy_1_x_0);
// x+y=1 & y=0, intersect (1, 0)
auto ret_xy_1_y_0 = analysis.IntersectConstraints(
line_x_y_1, line_y_0, constant_neg_1, constant_2);
EXPECT_NE(nullptr, ret_xy_1_y_0->AsDependencePoint());
EXPECT_EQ(*point_1_0, *ret_xy_1_y_0);
// x+y=1 & x=1, intersect (1, 0)
auto ret_xy_1_x_1 = analysis.IntersectConstraints(
line_x_y_1, line_x_1, constant_neg_1, constant_2);
EXPECT_NE(nullptr, ret_xy_1_x_1->AsDependencePoint());
EXPECT_EQ(*point_1_0, *ret_xy_1_x_1);
// x+y=1 & y=1, intersect (0, 1)
auto ret_xy_1_y_1 = analysis.IntersectConstraints(
line_x_y_1, line_y_1, constant_neg_1, constant_2);
EXPECT_NE(nullptr, ret_xy_1_y_1->AsDependencePoint());
EXPECT_EQ(*point_0_1, *ret_xy_1_y_1);
// x=0 & x+y=1, intersect (0, 1)
auto ret_x_0_xy_1 = analysis.IntersectConstraints(
line_x_0, line_x_y_1, constant_neg_1, constant_2);
EXPECT_NE(nullptr, ret_x_0_xy_1->AsDependencePoint());
EXPECT_EQ(*point_0_1, *ret_x_0_xy_1);
// y=0 & x+y=1, intersect (1, 0)
auto ret_y_0_xy_1 = analysis.IntersectConstraints(
line_y_0, line_x_y_1, constant_neg_1, constant_2);
EXPECT_NE(nullptr, ret_y_0_xy_1->AsDependencePoint());
EXPECT_EQ(*point_1_0, *ret_y_0_xy_1);
// x=1 & x+y=1, intersect (1, 0)
auto ret_x_1_xy_1 = analysis.IntersectConstraints(
line_x_1, line_x_y_1, constant_neg_2, constant_2);
EXPECT_NE(nullptr, ret_x_1_xy_1->AsDependencePoint());
EXPECT_EQ(*point_1_0, *ret_x_1_xy_1);
// y=1 & x+y=1, intersect (0, 1)
auto ret_y_1_xy_1 = analysis.IntersectConstraints(
line_y_1, line_x_y_1, constant_neg_2, constant_2);
EXPECT_NE(nullptr, ret_y_1_xy_1->AsDependencePoint());
EXPECT_EQ(*point_0_1, *ret_y_1_xy_1);
}
{
// Line and point
auto a = scalar_evolution->CreateConstant(3);
auto b = scalar_evolution->CreateConstant(10);
auto c = scalar_evolution->CreateConstant(16);
auto line = analysis.make_constraint<DependenceLine>(a, b, c, nullptr);
// Point on line
auto x = scalar_evolution->CreateConstant(2);
auto y = scalar_evolution->CreateConstant(1);
auto point_0 = analysis.make_constraint<DependencePoint>(x, y, nullptr);
auto ret_0 = analysis.IntersectConstraints(line, point_0, nullptr, nullptr);
auto ret_1 = analysis.IntersectConstraints(point_0, line, nullptr, nullptr);
auto ret_point_0 = ret_0->AsDependencePoint();
auto ret_point_1 = ret_1->AsDependencePoint();
ASSERT_NE(nullptr, ret_point_0);
ASSERT_NE(nullptr, ret_point_1);
EXPECT_EQ(*x, *ret_point_0->GetSource());
EXPECT_EQ(*y, *ret_point_0->GetDestination());
EXPECT_EQ(*x, *ret_point_1->GetSource());
EXPECT_EQ(*y, *ret_point_1->GetDestination());
// Point not on line
auto point_1 = analysis.make_constraint<DependencePoint>(a, a, nullptr);
auto ret_2 = analysis.IntersectConstraints(line, point_1, nullptr, nullptr);
auto ret_3 = analysis.IntersectConstraints(point_1, line, nullptr, nullptr);
EXPECT_NE(nullptr, ret_2->AsDependenceEmpty());
EXPECT_NE(nullptr, ret_3->AsDependenceEmpty());
// Non-constant
auto unknown = scalar_evolution->CreateCantComputeNode();
auto point_2 =
analysis.make_constraint<DependencePoint>(unknown, x, nullptr);
auto ret_4 = analysis.IntersectConstraints(line, point_2, nullptr, nullptr);
auto ret_5 = analysis.IntersectConstraints(point_2, line, nullptr, nullptr);
EXPECT_NE(nullptr, ret_4->AsDependenceNone());
EXPECT_NE(nullptr, ret_5->AsDependenceNone());
}
{
// Distance and point
auto d = scalar_evolution->CreateConstant(5);
auto distance = analysis.make_constraint<DependenceDistance>(d, nullptr);
// Point on line
auto x = scalar_evolution->CreateConstant(10);
auto point_0 = analysis.make_constraint<DependencePoint>(d, x, nullptr);
auto ret_0 =
analysis.IntersectConstraints(distance, point_0, nullptr, nullptr);
auto ret_1 =
analysis.IntersectConstraints(point_0, distance, nullptr, nullptr);
auto ret_point_0 = ret_0->AsDependencePoint();
auto ret_point_1 = ret_1->AsDependencePoint();
ASSERT_NE(nullptr, ret_point_0);
ASSERT_NE(nullptr, ret_point_1);
// Point not on line
auto point_1 = analysis.make_constraint<DependencePoint>(x, x, nullptr);
auto ret_2 =
analysis.IntersectConstraints(distance, point_1, nullptr, nullptr);
auto ret_3 =
analysis.IntersectConstraints(point_1, distance, nullptr, nullptr);
EXPECT_NE(nullptr, ret_2->AsDependenceEmpty());
EXPECT_NE(nullptr, ret_3->AsDependenceEmpty());
// Non-constant
auto unknown = scalar_evolution->CreateCantComputeNode();
auto unknown_distance =
analysis.make_constraint<DependenceDistance>(unknown, nullptr);
auto ret_4 = analysis.IntersectConstraints(unknown_distance, point_1,
nullptr, nullptr);
auto ret_5 = analysis.IntersectConstraints(point_1, unknown_distance,
nullptr, nullptr);
EXPECT_NE(nullptr, ret_4->AsDependenceNone());
EXPECT_NE(nullptr, ret_5->AsDependenceNone());
}
}
} // namespace
} // namespace opt
} // namespace spvtools