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swiftshader / SwiftShader / cd848cd695a460a223de0658b7f8553d012b4184 / . / third_party / SPIRV-Tools / test / opt / loop_optimizations / dependence_analysis_helpers.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 <string>
#include <unordered_set>
#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/scalar_analysis.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 DependencyAnalysisHelpers = ::testing::Test;
/*
Generated from the following GLSL fragment shader
with --eliminate-local-multi-store
#version 440 core
void a() {
int[10][10] arr;
int i = 0;
int j = 0;
for (; i < 10 && j < 10; i++, j++) {
arr[i][j] = arr[i][j];
}
}
void b() {
int[10] arr;
for (int i = 0; i < 10; i+=2) {
arr[i] = arr[i];
}
}
void main(){
a();
b();
}
*/
TEST(DependencyAnalysisHelpers, UnsupportedLoops) {
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 %14 "j"
OpName %32 "arr"
OpName %45 "i"
OpName %54 "arr"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%10 = OpTypeInt 32 1
%11 = OpTypePointer Function %10
%13 = OpConstant %10 0
%21 = OpConstant %10 10
%22 = OpTypeBool
%27 = OpTypeInt 32 0
%28 = OpConstant %27 10
%29 = OpTypeArray %10 %28
%30 = OpTypeArray %29 %28
%31 = OpTypePointer Function %30
%41 = OpConstant %10 1
%53 = OpTypePointer Function %29
%60 = OpConstant %10 2
%4 = OpFunction %2 None %3
%5 = OpLabel
%63 = OpFunctionCall %2 %6
%64 = OpFunctionCall %2 %8
OpReturn
OpFunctionEnd
%6 = OpFunction %2 None %3
%7 = OpLabel
%12 = OpVariable %11 Function
%14 = OpVariable %11 Function
%32 = OpVariable %31 Function
OpStore %12 %13
OpStore %14 %13
OpBranch %15
%15 = OpLabel
%65 = OpPhi %10 %13 %7 %42 %18
%66 = OpPhi %10 %13 %7 %44 %18
OpLoopMerge %17 %18 None
OpBranch %19
%19 = OpLabel
%23 = OpSLessThan %22 %65 %21
%25 = OpSLessThan %22 %66 %21
%26 = OpLogicalAnd %22 %23 %25
OpBranchConditional %26 %16 %17
%16 = OpLabel
%37 = OpAccessChain %11 %32 %65 %66
%38 = OpLoad %10 %37
%39 = OpAccessChain %11 %32 %65 %66
OpStore %39 %38
OpBranch %18
%18 = OpLabel
%42 = OpIAdd %10 %65 %41
OpStore %12 %42
%44 = OpIAdd %10 %66 %41
OpStore %14 %44
OpBranch %15
%17 = OpLabel
OpReturn
OpFunctionEnd
%8 = OpFunction %2 None %3
%9 = OpLabel
%45 = OpVariable %11 Function
%54 = OpVariable %53 Function
OpStore %45 %13
OpBranch %46
%46 = OpLabel
%67 = OpPhi %10 %13 %9 %62 %49
OpLoopMerge %48 %49 None
OpBranch %50
%50 = OpLabel
%52 = OpSLessThan %22 %67 %21
OpBranchConditional %52 %47 %48
%47 = OpLabel
%57 = OpAccessChain %11 %54 %67
%58 = OpLoad %10 %57
%59 = OpAccessChain %11 %54 %67
OpStore %59 %58
OpBranch %49
%49 = OpLabel
%62 = OpIAdd %10 %67 %60
OpStore %45 %62
OpBranch %46
%48 = 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;
{
// 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[1] = {nullptr};
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 16)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store[stores_found] = &inst;
++stores_found;
}
}
// 38 -> 39
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.IsSupportedLoop(loops[0]));
EXPECT_FALSE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(38),
store[0], &distance_vector));
EXPECT_EQ(distance_vector.GetEntries()[0].dependence_information,
DistanceEntry::DependenceInformation::UNKNOWN);
EXPECT_EQ(distance_vector.GetEntries()[0].direction,
DistanceEntry::Directions::ALL);
}
{
// 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[1] = {nullptr};
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 47)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
store[stores_found] = &inst;
++stores_found;
}
}
// 58 -> 59
DistanceVector distance_vector{loops.size()};
EXPECT_FALSE(analysis.IsSupportedLoop(loops[0]));
EXPECT_FALSE(analysis.GetDependence(context->get_def_use_mgr()->GetDef(58),
store[0], &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
void a() {
for (int i = -10; i < 0; i++) {
}
}
void b() {
for (int i = -5; i < 5; i++) {
}
}
void c() {
for (int i = 0; i < 10; i++) {
}
}
void d() {
for (int i = 5; i < 15; i++) {
}
}
void e() {
for (int i = -10; i <= 0; i++) {
}
}
void f() {
for (int i = -5; i <= 5; i++) {
}
}
void g() {
for (int i = 0; i <= 10; i++) {
}
}
void h() {
for (int i = 5; i <= 15; i++) {
}
}
void i() {
for (int i = 0; i > -10; i--) {
}
}
void j() {
for (int i = 5; i > -5; i--) {
}
}
void k() {
for (int i = 10; i > 0; i--) {
}
}
void l() {
for (int i = 15; i > 5; i--) {
}
}
void m() {
for (int i = 0; i >= -10; i--) {
}
}
void n() {
for (int i = 5; i >= -5; i--) {
}
}
void o() {
for (int i = 10; i >= 0; i--) {
}
}
void p() {
for (int i = 15; i >= 5; i--) {
}
}
void main(){
a();
b();
c();
d();
e();
f();
g();
h();
i();
j();
k();
l();
m();
n();
o();
p();
}
*/
TEST(DependencyAnalysisHelpers, loop_information) {
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 %22 "i("
OpName %24 "j("
OpName %26 "k("
OpName %28 "l("
OpName %30 "m("
OpName %32 "n("
OpName %34 "o("
OpName %36 "p("
OpName %40 "i"
OpName %54 "i"
OpName %66 "i"
OpName %77 "i"
OpName %88 "i"
OpName %98 "i"
OpName %108 "i"
OpName %118 "i"
OpName %128 "i"
OpName %138 "i"
OpName %148 "i"
OpName %158 "i"
OpName %168 "i"
OpName %178 "i"
OpName %188 "i"
OpName %198 "i"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%38 = OpTypeInt 32 1
%39 = OpTypePointer Function %38
%41 = OpConstant %38 -10
%48 = OpConstant %38 0
%49 = OpTypeBool
%52 = OpConstant %38 1
%55 = OpConstant %38 -5
%62 = OpConstant %38 5
%73 = OpConstant %38 10
%84 = OpConstant %38 15
%4 = OpFunction %2 None %3
%5 = OpLabel
%208 = OpFunctionCall %2 %6
%209 = OpFunctionCall %2 %8
%210 = OpFunctionCall %2 %10
%211 = OpFunctionCall %2 %12
%212 = OpFunctionCall %2 %14
%213 = OpFunctionCall %2 %16
%214 = OpFunctionCall %2 %18
%215 = OpFunctionCall %2 %20
%216 = OpFunctionCall %2 %22
%217 = OpFunctionCall %2 %24
%218 = OpFunctionCall %2 %26
%219 = OpFunctionCall %2 %28
%220 = OpFunctionCall %2 %30
%221 = OpFunctionCall %2 %32
%222 = OpFunctionCall %2 %34
%223 = OpFunctionCall %2 %36
OpReturn
OpFunctionEnd
%6 = OpFunction %2 None %3
%7 = OpLabel
%40 = OpVariable %39 Function
OpStore %40 %41
OpBranch %42
%42 = OpLabel
%224 = OpPhi %38 %41 %7 %53 %45
OpLoopMerge %44 %45 None
OpBranch %46
%46 = OpLabel
%50 = OpSLessThan %49 %224 %48
OpBranchConditional %50 %43 %44
%43 = OpLabel
OpBranch %45
%45 = OpLabel
%53 = OpIAdd %38 %224 %52
OpStore %40 %53
OpBranch %42
%44 = OpLabel
OpReturn
OpFunctionEnd
%8 = OpFunction %2 None %3
%9 = OpLabel
%54 = OpVariable %39 Function
OpStore %54 %55
OpBranch %56
%56 = OpLabel
%225 = OpPhi %38 %55 %9 %65 %59
OpLoopMerge %58 %59 None
OpBranch %60
%60 = OpLabel
%63 = OpSLessThan %49 %225 %62
OpBranchConditional %63 %57 %58
%57 = OpLabel
OpBranch %59
%59 = OpLabel
%65 = OpIAdd %38 %225 %52
OpStore %54 %65
OpBranch %56
%58 = OpLabel
OpReturn
OpFunctionEnd
%10 = OpFunction %2 None %3
%11 = OpLabel
%66 = OpVariable %39 Function
OpStore %66 %48
OpBranch %67
%67 = OpLabel
%226 = OpPhi %38 %48 %11 %76 %70
OpLoopMerge %69 %70 None
OpBranch %71
%71 = OpLabel
%74 = OpSLessThan %49 %226 %73
OpBranchConditional %74 %68 %69
%68 = OpLabel
OpBranch %70
%70 = OpLabel
%76 = OpIAdd %38 %226 %52
OpStore %66 %76
OpBranch %67
%69 = OpLabel
OpReturn
OpFunctionEnd
%12 = OpFunction %2 None %3
%13 = OpLabel
%77 = OpVariable %39 Function
OpStore %77 %62
OpBranch %78
%78 = OpLabel
%227 = OpPhi %38 %62 %13 %87 %81
OpLoopMerge %80 %81 None
OpBranch %82
%82 = OpLabel
%85 = OpSLessThan %49 %227 %84
OpBranchConditional %85 %79 %80
%79 = OpLabel
OpBranch %81
%81 = OpLabel
%87 = OpIAdd %38 %227 %52
OpStore %77 %87
OpBranch %78
%80 = OpLabel
OpReturn
OpFunctionEnd
%14 = OpFunction %2 None %3
%15 = OpLabel
%88 = OpVariable %39 Function
OpStore %88 %41
OpBranch %89
%89 = OpLabel
%228 = OpPhi %38 %41 %15 %97 %92
OpLoopMerge %91 %92 None
OpBranch %93
%93 = OpLabel
%95 = OpSLessThanEqual %49 %228 %48
OpBranchConditional %95 %90 %91
%90 = OpLabel
OpBranch %92
%92 = OpLabel
%97 = OpIAdd %38 %228 %52
OpStore %88 %97
OpBranch %89
%91 = OpLabel
OpReturn
OpFunctionEnd
%16 = OpFunction %2 None %3
%17 = OpLabel
%98 = OpVariable %39 Function
OpStore %98 %55
OpBranch %99
%99 = OpLabel
%229 = OpPhi %38 %55 %17 %107 %102
OpLoopMerge %101 %102 None
OpBranch %103
%103 = OpLabel
%105 = OpSLessThanEqual %49 %229 %62
OpBranchConditional %105 %100 %101
%100 = OpLabel
OpBranch %102
%102 = OpLabel
%107 = OpIAdd %38 %229 %52
OpStore %98 %107
OpBranch %99
%101 = OpLabel
OpReturn
OpFunctionEnd
%18 = OpFunction %2 None %3
%19 = OpLabel
%108 = OpVariable %39 Function
OpStore %108 %48
OpBranch %109
%109 = OpLabel
%230 = OpPhi %38 %48 %19 %117 %112
OpLoopMerge %111 %112 None
OpBranch %113
%113 = OpLabel
%115 = OpSLessThanEqual %49 %230 %73
OpBranchConditional %115 %110 %111
%110 = OpLabel
OpBranch %112
%112 = OpLabel
%117 = OpIAdd %38 %230 %52
OpStore %108 %117
OpBranch %109
%111 = OpLabel
OpReturn
OpFunctionEnd
%20 = OpFunction %2 None %3
%21 = OpLabel
%118 = OpVariable %39 Function
OpStore %118 %62
OpBranch %119
%119 = OpLabel
%231 = OpPhi %38 %62 %21 %127 %122
OpLoopMerge %121 %122 None
OpBranch %123
%123 = OpLabel
%125 = OpSLessThanEqual %49 %231 %84
OpBranchConditional %125 %120 %121
%120 = OpLabel
OpBranch %122
%122 = OpLabel
%127 = OpIAdd %38 %231 %52
OpStore %118 %127
OpBranch %119
%121 = OpLabel
OpReturn
OpFunctionEnd
%22 = OpFunction %2 None %3
%23 = OpLabel
%128 = OpVariable %39 Function
OpStore %128 %48
OpBranch %129
%129 = OpLabel
%232 = OpPhi %38 %48 %23 %137 %132
OpLoopMerge %131 %132 None
OpBranch %133
%133 = OpLabel
%135 = OpSGreaterThan %49 %232 %41
OpBranchConditional %135 %130 %131
%130 = OpLabel
OpBranch %132
%132 = OpLabel
%137 = OpISub %38 %232 %52
OpStore %128 %137
OpBranch %129
%131 = OpLabel
OpReturn
OpFunctionEnd
%24 = OpFunction %2 None %3
%25 = OpLabel
%138 = OpVariable %39 Function
OpStore %138 %62
OpBranch %139
%139 = OpLabel
%233 = OpPhi %38 %62 %25 %147 %142
OpLoopMerge %141 %142 None
OpBranch %143
%143 = OpLabel
%145 = OpSGreaterThan %49 %233 %55
OpBranchConditional %145 %140 %141
%140 = OpLabel
OpBranch %142
%142 = OpLabel
%147 = OpISub %38 %233 %52
OpStore %138 %147
OpBranch %139
%141 = OpLabel
OpReturn
OpFunctionEnd
%26 = OpFunction %2 None %3
%27 = OpLabel
%148 = OpVariable %39 Function
OpStore %148 %73
OpBranch %149
%149 = OpLabel
%234 = OpPhi %38 %73 %27 %157 %152
OpLoopMerge %151 %152 None
OpBranch %153
%153 = OpLabel
%155 = OpSGreaterThan %49 %234 %48
OpBranchConditional %155 %150 %151
%150 = OpLabel
OpBranch %152
%152 = OpLabel
%157 = OpISub %38 %234 %52
OpStore %148 %157
OpBranch %149
%151 = OpLabel
OpReturn
OpFunctionEnd
%28 = OpFunction %2 None %3
%29 = OpLabel
%158 = OpVariable %39 Function
OpStore %158 %84
OpBranch %159
%159 = OpLabel
%235 = OpPhi %38 %84 %29 %167 %162
OpLoopMerge %161 %162 None
OpBranch %163
%163 = OpLabel
%165 = OpSGreaterThan %49 %235 %62
OpBranchConditional %165 %160 %161
%160 = OpLabel
OpBranch %162
%162 = OpLabel
%167 = OpISub %38 %235 %52
OpStore %158 %167
OpBranch %159
%161 = OpLabel
OpReturn
OpFunctionEnd
%30 = OpFunction %2 None %3
%31 = OpLabel
%168 = OpVariable %39 Function
OpStore %168 %48
OpBranch %169
%169 = OpLabel
%236 = OpPhi %38 %48 %31 %177 %172
OpLoopMerge %171 %172 None
OpBranch %173
%173 = OpLabel
%175 = OpSGreaterThanEqual %49 %236 %41
OpBranchConditional %175 %170 %171
%170 = OpLabel
OpBranch %172
%172 = OpLabel
%177 = OpISub %38 %236 %52
OpStore %168 %177
OpBranch %169
%171 = OpLabel
OpReturn
OpFunctionEnd
%32 = OpFunction %2 None %3
%33 = OpLabel
%178 = OpVariable %39 Function
OpStore %178 %62
OpBranch %179
%179 = OpLabel
%237 = OpPhi %38 %62 %33 %187 %182
OpLoopMerge %181 %182 None
OpBranch %183
%183 = OpLabel
%185 = OpSGreaterThanEqual %49 %237 %55
OpBranchConditional %185 %180 %181
%180 = OpLabel
OpBranch %182
%182 = OpLabel
%187 = OpISub %38 %237 %52
OpStore %178 %187
OpBranch %179
%181 = OpLabel
OpReturn
OpFunctionEnd
%34 = OpFunction %2 None %3
%35 = OpLabel
%188 = OpVariable %39 Function
OpStore %188 %73
OpBranch %189
%189 = OpLabel
%238 = OpPhi %38 %73 %35 %197 %192
OpLoopMerge %191 %192 None
OpBranch %193
%193 = OpLabel
%195 = OpSGreaterThanEqual %49 %238 %48
OpBranchConditional %195 %190 %191
%190 = OpLabel
OpBranch %192
%192 = OpLabel
%197 = OpISub %38 %238 %52
OpStore %188 %197
OpBranch %189
%191 = OpLabel
OpReturn
OpFunctionEnd
%36 = OpFunction %2 None %3
%37 = OpLabel
%198 = OpVariable %39 Function
OpStore %198 %84
OpBranch %199
%199 = OpLabel
%239 = OpPhi %38 %84 %37 %207 %202
OpLoopMerge %201 %202 None
OpBranch %203
%203 = OpLabel
%205 = OpSGreaterThanEqual %49 %239 %62
OpBranchConditional %205 %200 %201
%200 = OpLabel
OpBranch %202
%202 = OpLabel
%207 = OpISub %38 %239 %52
OpStore %198 %207
OpBranch %199
%201 = 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;
{
// 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};
EXPECT_EQ(
analysis.GetLowerBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
-10);
EXPECT_EQ(
analysis.GetUpperBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
-1);
EXPECT_EQ(
analysis.GetTripCount(loop)->AsSEConstantNode()->FoldToSingleValue(),
10);
EXPECT_EQ(analysis.GetFirstTripInductionNode(loop),
analysis.GetScalarEvolution()->CreateConstant(-10));
EXPECT_EQ(analysis.GetFinalTripInductionNode(
loop, analysis.GetScalarEvolution()->CreateConstant(1)),
analysis.GetScalarEvolution()->CreateConstant(-1));
}
{
// 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};
EXPECT_EQ(
analysis.GetLowerBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
-5);
EXPECT_EQ(
analysis.GetUpperBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
4);
EXPECT_EQ(
analysis.GetTripCount(loop)->AsSEConstantNode()->FoldToSingleValue(),
10);
EXPECT_EQ(analysis.GetFirstTripInductionNode(loop),
analysis.GetScalarEvolution()->CreateConstant(-5));
EXPECT_EQ(analysis.GetFinalTripInductionNode(
loop, analysis.GetScalarEvolution()->CreateConstant(1)),
analysis.GetScalarEvolution()->CreateConstant(4));
}
{
// 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};
EXPECT_EQ(
analysis.GetLowerBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
0);
EXPECT_EQ(
analysis.GetUpperBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
9);
EXPECT_EQ(
analysis.GetTripCount(loop)->AsSEConstantNode()->FoldToSingleValue(),
10);
EXPECT_EQ(analysis.GetFirstTripInductionNode(loop),
analysis.GetScalarEvolution()->CreateConstant(0));
EXPECT_EQ(analysis.GetFinalTripInductionNode(
loop, analysis.GetScalarEvolution()->CreateConstant(1)),
analysis.GetScalarEvolution()->CreateConstant(9));
}
{
// 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};
EXPECT_EQ(
analysis.GetLowerBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
5);
EXPECT_EQ(
analysis.GetUpperBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
14);
EXPECT_EQ(
analysis.GetTripCount(loop)->AsSEConstantNode()->FoldToSingleValue(),
10);
EXPECT_EQ(analysis.GetFirstTripInductionNode(loop),
analysis.GetScalarEvolution()->CreateConstant(5));
EXPECT_EQ(analysis.GetFinalTripInductionNode(
loop, analysis.GetScalarEvolution()->CreateConstant(1)),
analysis.GetScalarEvolution()->CreateConstant(14));
}
{
// Function e
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};
EXPECT_EQ(
analysis.GetLowerBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
-10);
EXPECT_EQ(
analysis.GetUpperBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
0);
EXPECT_EQ(
analysis.GetTripCount(loop)->AsSEConstantNode()->FoldToSingleValue(),
11);
EXPECT_EQ(analysis.GetFirstTripInductionNode(loop),
analysis.GetScalarEvolution()->CreateConstant(-10));
EXPECT_EQ(analysis.GetFinalTripInductionNode(
loop, analysis.GetScalarEvolution()->CreateConstant(1)),
analysis.GetScalarEvolution()->CreateConstant(0));
}
{
// Function f
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};
EXPECT_EQ(
analysis.GetLowerBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
-5);
EXPECT_EQ(
analysis.GetUpperBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
5);
EXPECT_EQ(
analysis.GetTripCount(loop)->AsSEConstantNode()->FoldToSingleValue(),
11);
EXPECT_EQ(analysis.GetFirstTripInductionNode(loop),
analysis.GetScalarEvolution()->CreateConstant(-5));
EXPECT_EQ(analysis.GetFinalTripInductionNode(
loop, analysis.GetScalarEvolution()->CreateConstant(1)),
analysis.GetScalarEvolution()->CreateConstant(5));
}
{
// Function g
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};
EXPECT_EQ(
analysis.GetLowerBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
0);
EXPECT_EQ(
analysis.GetUpperBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
10);
EXPECT_EQ(
analysis.GetTripCount(loop)->AsSEConstantNode()->FoldToSingleValue(),
11);
EXPECT_EQ(analysis.GetFirstTripInductionNode(loop),
analysis.GetScalarEvolution()->CreateConstant(0));
EXPECT_EQ(analysis.GetFinalTripInductionNode(
loop, analysis.GetScalarEvolution()->CreateConstant(1)),
analysis.GetScalarEvolution()->CreateConstant(10));
}
{
// Function h
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};
EXPECT_EQ(
analysis.GetLowerBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
5);
EXPECT_EQ(
analysis.GetUpperBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
15);
EXPECT_EQ(
analysis.GetTripCount(loop)->AsSEConstantNode()->FoldToSingleValue(),
11);
EXPECT_EQ(analysis.GetFirstTripInductionNode(loop),
analysis.GetScalarEvolution()->CreateConstant(5));
EXPECT_EQ(analysis.GetFinalTripInductionNode(
loop, analysis.GetScalarEvolution()->CreateConstant(1)),
analysis.GetScalarEvolution()->CreateConstant(15));
}
{
// Function i
const Function* f = spvtest::GetFunction(module, 22);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
EXPECT_EQ(
analysis.GetLowerBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
0);
EXPECT_EQ(
analysis.GetUpperBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
-9);
EXPECT_EQ(
analysis.GetTripCount(loop)->AsSEConstantNode()->FoldToSingleValue(),
10);
EXPECT_EQ(analysis.GetFirstTripInductionNode(loop),
analysis.GetScalarEvolution()->CreateConstant(0));
EXPECT_EQ(analysis.GetFinalTripInductionNode(
loop, analysis.GetScalarEvolution()->CreateConstant(-1)),
analysis.GetScalarEvolution()->CreateConstant(-9));
}
{
// Function j
const Function* f = spvtest::GetFunction(module, 24);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
EXPECT_EQ(
analysis.GetLowerBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
5);
EXPECT_EQ(
analysis.GetUpperBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
-4);
EXPECT_EQ(
analysis.GetTripCount(loop)->AsSEConstantNode()->FoldToSingleValue(),
10);
EXPECT_EQ(analysis.GetFirstTripInductionNode(loop),
analysis.GetScalarEvolution()->CreateConstant(5));
EXPECT_EQ(analysis.GetFinalTripInductionNode(
loop, analysis.GetScalarEvolution()->CreateConstant(-1)),
analysis.GetScalarEvolution()->CreateConstant(-4));
}
{
// Function k
const Function* f = spvtest::GetFunction(module, 26);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
EXPECT_EQ(
analysis.GetLowerBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
10);
EXPECT_EQ(
analysis.GetUpperBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
1);
EXPECT_EQ(
analysis.GetTripCount(loop)->AsSEConstantNode()->FoldToSingleValue(),
10);
EXPECT_EQ(analysis.GetFirstTripInductionNode(loop),
analysis.GetScalarEvolution()->CreateConstant(10));
EXPECT_EQ(analysis.GetFinalTripInductionNode(
loop, analysis.GetScalarEvolution()->CreateConstant(-1)),
analysis.GetScalarEvolution()->CreateConstant(1));
}
{
// Function l
const Function* f = spvtest::GetFunction(module, 28);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
EXPECT_EQ(
analysis.GetLowerBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
15);
EXPECT_EQ(
analysis.GetUpperBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
6);
EXPECT_EQ(
analysis.GetTripCount(loop)->AsSEConstantNode()->FoldToSingleValue(),
10);
EXPECT_EQ(analysis.GetFirstTripInductionNode(loop),
analysis.GetScalarEvolution()->CreateConstant(15));
EXPECT_EQ(analysis.GetFinalTripInductionNode(
loop, analysis.GetScalarEvolution()->CreateConstant(-1)),
analysis.GetScalarEvolution()->CreateConstant(6));
}
{
// Function m
const Function* f = spvtest::GetFunction(module, 30);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
EXPECT_EQ(
analysis.GetLowerBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
0);
EXPECT_EQ(
analysis.GetUpperBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
-10);
EXPECT_EQ(
analysis.GetTripCount(loop)->AsSEConstantNode()->FoldToSingleValue(),
11);
EXPECT_EQ(analysis.GetFirstTripInductionNode(loop),
analysis.GetScalarEvolution()->CreateConstant(0));
EXPECT_EQ(analysis.GetFinalTripInductionNode(
loop, analysis.GetScalarEvolution()->CreateConstant(-1)),
analysis.GetScalarEvolution()->CreateConstant(-10));
}
{
// Function n
const Function* f = spvtest::GetFunction(module, 32);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
EXPECT_EQ(
analysis.GetLowerBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
5);
EXPECT_EQ(
analysis.GetUpperBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
-5);
EXPECT_EQ(
analysis.GetTripCount(loop)->AsSEConstantNode()->FoldToSingleValue(),
11);
EXPECT_EQ(analysis.GetFirstTripInductionNode(loop),
analysis.GetScalarEvolution()->CreateConstant(5));
EXPECT_EQ(analysis.GetFinalTripInductionNode(
loop, analysis.GetScalarEvolution()->CreateConstant(-1)),
analysis.GetScalarEvolution()->CreateConstant(-5));
}
{
// Function o
const Function* f = spvtest::GetFunction(module, 34);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
EXPECT_EQ(
analysis.GetLowerBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
10);
EXPECT_EQ(
analysis.GetUpperBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
0);
EXPECT_EQ(
analysis.GetTripCount(loop)->AsSEConstantNode()->FoldToSingleValue(),
11);
EXPECT_EQ(analysis.GetFirstTripInductionNode(loop),
analysis.GetScalarEvolution()->CreateConstant(10));
EXPECT_EQ(analysis.GetFinalTripInductionNode(
loop, analysis.GetScalarEvolution()->CreateConstant(-1)),
analysis.GetScalarEvolution()->CreateConstant(0));
}
{
// Function p
const Function* f = spvtest::GetFunction(module, 36);
LoopDescriptor& ld = *context->GetLoopDescriptor(f);
Loop* loop = &ld.GetLoopByIndex(0);
std::vector<const Loop*> loops{loop};
LoopDependenceAnalysis analysis{context.get(), loops};
EXPECT_EQ(
analysis.GetLowerBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
15);
EXPECT_EQ(
analysis.GetUpperBound(loop)->AsSEConstantNode()->FoldToSingleValue(),
5);
EXPECT_EQ(
analysis.GetTripCount(loop)->AsSEConstantNode()->FoldToSingleValue(),
11);
EXPECT_EQ(analysis.GetFirstTripInductionNode(loop),
analysis.GetScalarEvolution()->CreateConstant(15));
EXPECT_EQ(analysis.GetFinalTripInductionNode(
loop, analysis.GetScalarEvolution()->CreateConstant(-1)),
analysis.GetScalarEvolution()->CreateConstant(5));
}
}
/*
Generated from the following GLSL fragment shader
with --eliminate-local-multi-store
#version 440 core
void main(){
for (int i = 0; i < 10; i++) {
}
}
*/
TEST(DependencyAnalysisHelpers, bounds_checks) {
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"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%9 = OpConstant %6 0
%16 = OpConstant %6 10
%17 = OpTypeBool
%20 = OpConstant %6 1
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
OpStore %8 %9
OpBranch %10
%10 = OpLabel
%22 = OpPhi %6 %9 %5 %21 %13
OpLoopMerge %12 %13 None
OpBranch %14
%14 = OpLabel
%18 = OpSLessThan %17 %22 %16
OpBranchConditional %18 %11 %12
%11 = OpLabel
OpBranch %13
%13 = OpLabel
%21 = OpIAdd %6 %22 %20
OpStore %8 %21
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;
// We need a shader that includes a loop for this test so we can build a
// LoopDependenceAnalaysis
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};
EXPECT_TRUE(analysis.IsWithinBounds(0, 0, 0));
EXPECT_TRUE(analysis.IsWithinBounds(0, -1, 0));
EXPECT_TRUE(analysis.IsWithinBounds(0, 0, 1));
EXPECT_TRUE(analysis.IsWithinBounds(0, -1, 1));
EXPECT_TRUE(analysis.IsWithinBounds(-2, -2, -2));
EXPECT_TRUE(analysis.IsWithinBounds(-2, -3, 0));
EXPECT_TRUE(analysis.IsWithinBounds(-2, 0, -3));
EXPECT_TRUE(analysis.IsWithinBounds(2, 2, 2));
EXPECT_TRUE(analysis.IsWithinBounds(2, 3, 0));
EXPECT_FALSE(analysis.IsWithinBounds(2, 3, 3));
EXPECT_FALSE(analysis.IsWithinBounds(0, 1, 5));
EXPECT_FALSE(analysis.IsWithinBounds(0, -1, -4));
EXPECT_FALSE(analysis.IsWithinBounds(-2, -4, -3));
}
/*
Generated from the following GLSL fragment shader
with --eliminate-local-multi-store
#version 440 core
layout(location = 0) in vec4 in_vec;
// Loop iterates from constant to symbolic
void a() {
int N = int(in_vec.x);
int arr[10];
for (int i = 0; i < N; i++) { // Bounds are N - 0 - 1
arr[i] = arr[i+N]; // |distance| = N
arr[i+N] = arr[i]; // |distance| = N
}
}
void b() {
int N = int(in_vec.x);
int arr[10];
for (int i = 0; i <= N; i++) { // Bounds are N - 0
arr[i] = arr[i+N]; // |distance| = N
arr[i+N] = arr[i]; // |distance| = N
}
}
void c() {
int N = int(in_vec.x);
int arr[10];
for (int i = 9; i > N; i--) { // Bounds are 9 - N - 1
arr[i] = arr[i+N]; // |distance| = N
arr[i+N] = arr[i]; // |distance| = N
}
}
void d() {
int N = int(in_vec.x);
int arr[10];
for (int i = 9; i >= N; i--) { // Bounds are 9 - N
arr[i] = arr[i+N]; // |distance| = N
arr[i+N] = arr[i]; // |distance| = N
}
}
void main(){
a();
b();
c();
d();
}
*/
TEST(DependencyAnalysisHelpers, const_to_symbolic) {
const std::string text = R"( OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main" %20
OpExecutionMode %4 OriginUpperLeft
OpSource GLSL 440
OpName %4 "main"
OpName %6 "a("
OpName %8 "b("
OpName %10 "c("
OpName %12 "d("
OpName %16 "N"
OpName %20 "in_vec"
OpName %27 "i"
OpName %41 "arr"
OpName %59 "N"
OpName %63 "i"
OpName %72 "arr"
OpName %89 "N"
OpName %93 "i"
OpName %103 "arr"
OpName %120 "N"
OpName %124 "i"
OpName %133 "arr"
OpDecorate %20 Location 0
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%14 = OpTypeInt 32 1
%15 = OpTypePointer Function %14
%17 = OpTypeFloat 32
%18 = OpTypeVector %17 4
%19 = OpTypePointer Input %18
%20 = OpVariable %19 Input
%21 = OpTypeInt 32 0
%22 = OpConstant %21 0
%23 = OpTypePointer Input %17
%28 = OpConstant %14 0
%36 = OpTypeBool
%38 = OpConstant %21 10
%39 = OpTypeArray %14 %38
%40 = OpTypePointer Function %39
%57 = OpConstant %14 1
%94 = OpConstant %14 9
%4 = OpFunction %2 None %3
%5 = OpLabel
%150 = OpFunctionCall %2 %6
%151 = OpFunctionCall %2 %8
%152 = OpFunctionCall %2 %10
%153 = OpFunctionCall %2 %12
OpReturn
OpFunctionEnd
%6 = OpFunction %2 None %3
%7 = OpLabel
%16 = OpVariable %15 Function
%27 = OpVariable %15 Function
%41 = OpVariable %40 Function
%24 = OpAccessChain %23 %20 %22
%25 = OpLoad %17 %24
%26 = OpConvertFToS %14 %25
OpStore %16 %26
OpStore %27 %28
OpBranch %29
%29 = OpLabel
%154 = OpPhi %14 %28 %7 %58 %32
OpLoopMerge %31 %32 None
OpBranch %33
%33 = OpLabel
%37 = OpSLessThan %36 %154 %26
OpBranchConditional %37 %30 %31
%30 = OpLabel
%45 = OpIAdd %14 %154 %26
%46 = OpAccessChain %15 %41 %45
%47 = OpLoad %14 %46
%48 = OpAccessChain %15 %41 %154
OpStore %48 %47
%51 = OpIAdd %14 %154 %26
%53 = OpAccessChain %15 %41 %154
%54 = OpLoad %14 %53
%55 = OpAccessChain %15 %41 %51
OpStore %55 %54
OpBranch %32
%32 = OpLabel
%58 = OpIAdd %14 %154 %57
OpStore %27 %58
OpBranch %29
%31 = OpLabel
OpReturn
OpFunctionEnd
%8 = OpFunction %2 None %3
%9 = OpLabel
%59 = OpVariable %15 Function
%63 = OpVariable %15 Function
%72 = OpVariable %40 Function
%60 = OpAccessChain %23 %20 %22
%61 = OpLoad %17 %60
%62 = OpConvertFToS %14 %61
OpStore %59 %62
OpStore %63 %28
OpBranch %64
%64 = OpLabel
%155 = OpPhi %14 %28 %9 %88 %67
OpLoopMerge %66 %67 None
OpBranch %68
%68 = OpLabel
%71 = OpSLessThanEqual %36 %155 %62
OpBranchConditional %71 %65 %66
%65 = OpLabel
%76 = OpIAdd %14 %155 %62
%77 = OpAccessChain %15 %72 %76
%78 = OpLoad %14 %77
%79 = OpAccessChain %15 %72 %155
OpStore %79 %78
%82 = OpIAdd %14 %155 %62
%84 = OpAccessChain %15 %72 %155
%85 = OpLoad %14 %84
%86 = OpAccessChain %15 %72 %82
OpStore %86 %85
OpBranch %67
%67 = OpLabel
%88 = OpIAdd %14 %155 %57
OpStore %63 %88
OpBranch %64
%66 = OpLabel
OpReturn
OpFunctionEnd
%10 = OpFunction %2 None %3
%11 = OpLabel
%89 = OpVariable %15 Function
%93 = OpVariable %15 Function
%103 = OpVariable %40 Function
%90 = OpAccessChain %23 %20 %22
%91 = OpLoad %17 %90
%92 = OpConvertFToS %14 %91
OpStore %89 %92
OpStore %93 %94
OpBranch %95
%95 = OpLabel
%156 = OpPhi %14 %94 %11 %119 %98
OpLoopMerge %97 %98 None
OpBranch %99
%99 = OpLabel
%102 = OpSGreaterThan %36 %156 %92
OpBranchConditional %102 %96 %97
%96 = OpLabel
%107 = OpIAdd %14 %156 %92
%108 = OpAccessChain %15 %103 %107
%109 = OpLoad %14 %108
%110 = OpAccessChain %15 %103 %156
OpStore %110 %109
%113 = OpIAdd %14 %156 %92
%115 = OpAccessChain %15 %103 %156
%116 = OpLoad %14 %115
%117 = OpAccessChain %15 %103 %113
OpStore %117 %116
OpBranch %98
%98 = OpLabel
%119 = OpISub %14 %156 %57
OpStore %93 %119
OpBranch %95
%97 = OpLabel
OpReturn
OpFunctionEnd
%12 = OpFunction %2 None %3
%13 = OpLabel
%120 = OpVariable %15 Function
%124 = OpVariable %15 Function
%133 = OpVariable %40 Function
%121 = OpAccessChain %23 %20 %22
%122 = OpLoad %17 %121
%123 = OpConvertFToS %14 %122
OpStore %120 %123
OpStore %124 %94
OpBranch %125
%125 = OpLabel
%157 = OpPhi %14 %94 %13 %149 %128
OpLoopMerge %127 %128 None
OpBranch %129
%129 = OpLabel
%132 = OpSGreaterThanEqual %36 %157 %123
OpBranchConditional %132 %126 %127
%126 = OpLabel
%137 = OpIAdd %14 %157 %123
%138 = OpAccessChain %15 %133 %137
%139 = OpLoad %14 %138
%140 = OpAccessChain %15 %133 %157
OpStore %140 %139
%143 = OpIAdd %14 %157 %123
%145 = OpAccessChain %15 %133 %157
%146 = OpLoad %14 %145
%147 = OpAccessChain %15 %133 %143
OpStore %147 %146
OpBranch %128
%128 = OpLabel
%149 = OpISub %14 %157 %57
OpStore %124 %149
OpBranch %125
%127 = 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;
{
// 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* stores[2];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 30)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
stores[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 2; ++i) {
EXPECT_TRUE(stores[i]);
}
// 47 -> 48
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(47)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[0]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
// Independent and supported.
EXPECT_TRUE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
// 54 -> 55
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(54)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[1]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
// Independent but not supported.
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
}
{
// 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* stores[2];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 65)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
stores[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 2; ++i) {
EXPECT_TRUE(stores[i]);
}
// 78 -> 79
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(78)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[0]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
// Dependent.
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
// 85 -> 86
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(85)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[1]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
// Dependent.
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
}
{
// 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* stores[2];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 96)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
stores[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 2; ++i) {
EXPECT_TRUE(stores[i]);
}
// 109 -> 110
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(109)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[0]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
// Independent but not supported.
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
// 116 -> 117
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(116)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[1]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
// Independent but not supported.
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
}
{
// 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* stores[2];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 126)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
stores[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 2; ++i) {
EXPECT_TRUE(stores[i]);
}
// 139 -> 140
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(139)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[0]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
// Dependent.
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
// 146 -> 147
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(146)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[1]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
// Dependent.
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
}
}
/*
Generated from the following GLSL fragment shader
with --eliminate-local-multi-store
#version 440 core
layout(location = 0) in vec4 in_vec;
// Loop iterates from symbolic to constant
void a() {
int N = int(in_vec.x);
int arr[10];
for (int i = N; i < 9; i++) { // Bounds are 9 - N - 1
arr[i] = arr[i+N]; // |distance| = N
arr[i+N] = arr[i]; // |distance| = N
}
}
void b() {
int N = int(in_vec.x);
int arr[10];
for (int i = N; i <= 9; i++) { // Bounds are 9 - N
arr[i] = arr[i+N]; // |distance| = N
arr[i+N] = arr[i]; // |distance| = N
}
}
void c() {
int N = int(in_vec.x);
int arr[10];
for (int i = N; i > 0; i--) { // Bounds are N - 0 - 1
arr[i] = arr[i+N]; // |distance| = N
arr[i+N] = arr[i]; // |distance| = N
}
}
void d() {
int N = int(in_vec.x);
int arr[10];
for (int i = N; i >= 0; i--) { // Bounds are N - 0
arr[i] = arr[i+N]; // |distance| = N
arr[i+N] = arr[i]; // |distance| = N
}
}
void main(){
a();
b();
c();
d();
}
*/
TEST(DependencyAnalysisHelpers, symbolic_to_const) {
const std::string text = R"( OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main" %20
OpExecutionMode %4 OriginUpperLeft
OpSource GLSL 440
OpName %4 "main"
OpName %6 "a("
OpName %8 "b("
OpName %10 "c("
OpName %12 "d("
OpName %16 "N"
OpName %20 "in_vec"
OpName %27 "i"
OpName %41 "arr"
OpName %59 "N"
OpName %63 "i"
OpName %72 "arr"
OpName %89 "N"
OpName %93 "i"
OpName %103 "arr"
OpName %120 "N"
OpName %124 "i"
OpName %133 "arr"
OpDecorate %20 Location 0
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%14 = OpTypeInt 32 1
%15 = OpTypePointer Function %14
%17 = OpTypeFloat 32
%18 = OpTypeVector %17 4
%19 = OpTypePointer Input %18
%20 = OpVariable %19 Input
%21 = OpTypeInt 32 0
%22 = OpConstant %21 0
%23 = OpTypePointer Input %17
%35 = OpConstant %14 9
%36 = OpTypeBool
%38 = OpConstant %21 10
%39 = OpTypeArray %14 %38
%40 = OpTypePointer Function %39
%57 = OpConstant %14 1
%101 = OpConstant %14 0
%4 = OpFunction %2 None %3
%5 = OpLabel
%150 = OpFunctionCall %2 %6
%151 = OpFunctionCall %2 %8
%152 = OpFunctionCall %2 %10
%153 = OpFunctionCall %2 %12
OpReturn
OpFunctionEnd
%6 = OpFunction %2 None %3
%7 = OpLabel
%16 = OpVariable %15 Function
%27 = OpVariable %15 Function
%41 = OpVariable %40 Function
%24 = OpAccessChain %23 %20 %22
%25 = OpLoad %17 %24
%26 = OpConvertFToS %14 %25
OpStore %16 %26
OpStore %27 %26
OpBranch %29
%29 = OpLabel
%154 = OpPhi %14 %26 %7 %58 %32
OpLoopMerge %31 %32 None
OpBranch %33
%33 = OpLabel
%37 = OpSLessThan %36 %154 %35
OpBranchConditional %37 %30 %31
%30 = OpLabel
%45 = OpIAdd %14 %154 %26
%46 = OpAccessChain %15 %41 %45
%47 = OpLoad %14 %46
%48 = OpAccessChain %15 %41 %154
OpStore %48 %47
%51 = OpIAdd %14 %154 %26
%53 = OpAccessChain %15 %41 %154
%54 = OpLoad %14 %53
%55 = OpAccessChain %15 %41 %51
OpStore %55 %54
OpBranch %32
%32 = OpLabel
%58 = OpIAdd %14 %154 %57
OpStore %27 %58
OpBranch %29
%31 = OpLabel
OpReturn
OpFunctionEnd
%8 = OpFunction %2 None %3
%9 = OpLabel
%59 = OpVariable %15 Function
%63 = OpVariable %15 Function
%72 = OpVariable %40 Function
%60 = OpAccessChain %23 %20 %22
%61 = OpLoad %17 %60
%62 = OpConvertFToS %14 %61
OpStore %59 %62
OpStore %63 %62
OpBranch %65
%65 = OpLabel
%155 = OpPhi %14 %62 %9 %88 %68
OpLoopMerge %67 %68 None
OpBranch %69
%69 = OpLabel
%71 = OpSLessThanEqual %36 %155 %35
OpBranchConditional %71 %66 %67
%66 = OpLabel
%76 = OpIAdd %14 %155 %62
%77 = OpAccessChain %15 %72 %76
%78 = OpLoad %14 %77
%79 = OpAccessChain %15 %72 %155
OpStore %79 %78
%82 = OpIAdd %14 %155 %62
%84 = OpAccessChain %15 %72 %155
%85 = OpLoad %14 %84
%86 = OpAccessChain %15 %72 %82
OpStore %86 %85
OpBranch %68
%68 = OpLabel
%88 = OpIAdd %14 %155 %57
OpStore %63 %88
OpBranch %65
%67 = OpLabel
OpReturn
OpFunctionEnd
%10 = OpFunction %2 None %3
%11 = OpLabel
%89 = OpVariable %15 Function
%93 = OpVariable %15 Function
%103 = OpVariable %40 Function
%90 = OpAccessChain %23 %20 %22
%91 = OpLoad %17 %90
%92 = OpConvertFToS %14 %91
OpStore %89 %92
OpStore %93 %92
OpBranch %95
%95 = OpLabel
%156 = OpPhi %14 %92 %11 %119 %98
OpLoopMerge %97 %98 None
OpBranch %99
%99 = OpLabel
%102 = OpSGreaterThan %36 %156 %101
OpBranchConditional %102 %96 %97
%96 = OpLabel
%107 = OpIAdd %14 %156 %92
%108 = OpAccessChain %15 %103 %107
%109 = OpLoad %14 %108
%110 = OpAccessChain %15 %103 %156
OpStore %110 %109
%113 = OpIAdd %14 %156 %92
%115 = OpAccessChain %15 %103 %156
%116 = OpLoad %14 %115
%117 = OpAccessChain %15 %103 %113
OpStore %117 %116
OpBranch %98
%98 = OpLabel
%119 = OpISub %14 %156 %57
OpStore %93 %119
OpBranch %95
%97 = OpLabel
OpReturn
OpFunctionEnd
%12 = OpFunction %2 None %3
%13 = OpLabel
%120 = OpVariable %15 Function
%124 = OpVariable %15 Function
%133 = OpVariable %40 Function
%121 = OpAccessChain %23 %20 %22
%122 = OpLoad %17 %121
%123 = OpConvertFToS %14 %122
OpStore %120 %123
OpStore %124 %123
OpBranch %126
%126 = OpLabel
%157 = OpPhi %14 %123 %13 %149 %129
OpLoopMerge %128 %129 None
OpBranch %130
%130 = OpLabel
%132 = OpSGreaterThanEqual %36 %157 %101
OpBranchConditional %132 %127 %128
%127 = OpLabel
%137 = OpIAdd %14 %157 %123
%138 = OpAccessChain %15 %133 %137
%139 = OpLoad %14 %138
%140 = OpAccessChain %15 %133 %157
OpStore %140 %139
%143 = OpIAdd %14 %157 %123
%145 = OpAccessChain %15 %133 %157
%146 = OpLoad %14 %145
%147 = OpAccessChain %15 %133 %143
OpStore %147 %146
OpBranch %129
%129 = OpLabel
%149 = OpISub %14 %157 %57
OpStore %124 %149
OpBranch %126
%128 = 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;
{
// 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* stores[2];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 30)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
stores[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 2; ++i) {
EXPECT_TRUE(stores[i]);
}
// 47 -> 48
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(47)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[0]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
// Independent but not supported.
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
// 54 -> 55
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(54)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[1]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
// Independent but not supported.
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
}
{
// 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* stores[2];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 66)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
stores[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 2; ++i) {
EXPECT_TRUE(stores[i]);
}
// 78 -> 79
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(78)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[0]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
// Dependent.
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
// 85 -> 86
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(85)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[1]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
// Dependent.
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
}
{
// 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* stores[2];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 96)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
stores[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 2; ++i) {
EXPECT_TRUE(stores[i]);
}
// 109 -> 110
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(109)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[0]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
// Independent and supported.
EXPECT_TRUE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
// 116 -> 117
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(116)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[1]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
// Independent but not supported.
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
}
{
// 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* stores[2];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 127)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
stores[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 2; ++i) {
EXPECT_TRUE(stores[i]);
}
// 139 -> 140
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(139)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[0]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
// Dependent
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
// 146 -> 147
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(146)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[1]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
// Dependent
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
}
}
/*
Generated from the following GLSL fragment shader
with --eliminate-local-multi-store
#version 440 core
layout(location = 0) in vec4 in_vec;
// Loop iterates from symbolic to symbolic
void a() {
int M = int(in_vec.x);
int N = int(in_vec.y);
int arr[10];
for (int i = M; i < N; i++) { // Bounds are N - M - 1
arr[i+M+N] = arr[i+M+2*N]; // |distance| = N
arr[i+M+2*N] = arr[i+M+N]; // |distance| = N
}
}
void b() {
int M = int(in_vec.x);
int N = int(in_vec.y);
int arr[10];
for (int i = M; i <= N; i++) { // Bounds are N - M
arr[i+M+N] = arr[i+M+2*N]; // |distance| = N
arr[i+M+2*N] = arr[i+M+N]; // |distance| = N
}
}
void c() {
int M = int(in_vec.x);
int N = int(in_vec.y);
int arr[10];
for (int i = M; i > N; i--) { // Bounds are M - N - 1
arr[i+M+N] = arr[i+M+2*N]; // |distance| = N
arr[i+M+2*N] = arr[i+M+N]; // |distance| = N
}
}
void d() {
int M = int(in_vec.x);
int N = int(in_vec.y);
int arr[10];
for (int i = M; i >= N; i--) { // Bounds are M - N
arr[i+M+N] = arr[i+M+2*N]; // |distance| = N
arr[i+M+2*N] = arr[i+M+N]; // |distance| = N
}
}
void main(){
a();
b();
c();
d();
}
*/
TEST(DependencyAnalysisHelpers, symbolic_to_symbolic) {
const std::string text = R"( OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main" %20
OpExecutionMode %4 OriginUpperLeft
OpSource GLSL 440
OpName %4 "main"
OpName %6 "a("
OpName %8 "b("
OpName %10 "c("
OpName %12 "d("
OpName %16 "M"
OpName %20 "in_vec"
OpName %27 "N"
OpName %32 "i"
OpName %46 "arr"
OpName %79 "M"
OpName %83 "N"
OpName %87 "i"
OpName %97 "arr"
OpName %128 "M"
OpName %132 "N"
OpName %136 "i"
OpName %146 "arr"
OpName %177 "M"
OpName %181 "N"
OpName %185 "i"
OpName %195 "arr"
OpDecorate %20 Location 0
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%14 = OpTypeInt 32 1
%15 = OpTypePointer Function %14
%17 = OpTypeFloat 32
%18 = OpTypeVector %17 4
%19 = OpTypePointer Input %18
%20 = OpVariable %19 Input
%21 = OpTypeInt 32 0
%22 = OpConstant %21 0
%23 = OpTypePointer Input %17
%28 = OpConstant %21 1
%41 = OpTypeBool
%43 = OpConstant %21 10
%44 = OpTypeArray %14 %43
%45 = OpTypePointer Function %44
%55 = OpConstant %14 2
%77 = OpConstant %14 1
%4 = OpFunction %2 None %3
%5 = OpLabel
%226 = OpFunctionCall %2 %6
%227 = OpFunctionCall %2 %8
%228 = OpFunctionCall %2 %10
%229 = OpFunctionCall %2 %12
OpReturn
OpFunctionEnd
%6 = OpFunction %2 None %3
%7 = OpLabel
%16 = OpVariable %15 Function
%27 = OpVariable %15 Function
%32 = OpVariable %15 Function
%46 = OpVariable %45 Function
%24 = OpAccessChain %23 %20 %22
%25 = OpLoad %17 %24
%26 = OpConvertFToS %14 %25
OpStore %16 %26
%29 = OpAccessChain %23 %20 %28
%30 = OpLoad %17 %29
%31 = OpConvertFToS %14 %30
OpStore %27 %31
OpStore %32 %26
OpBranch %34
%34 = OpLabel
%230 = OpPhi %14 %26 %7 %78 %37
OpLoopMerge %36 %37 None
OpBranch %38
%38 = OpLabel
%42 = OpSLessThan %41 %230 %31
OpBranchConditional %42 %35 %36
%35 = OpLabel
%49 = OpIAdd %14 %230 %26
%51 = OpIAdd %14 %49 %31
%54 = OpIAdd %14 %230 %26
%57 = OpIMul %14 %55 %31
%58 = OpIAdd %14 %54 %57
%59 = OpAccessChain %15 %46 %58
%60 = OpLoad %14 %59
%61 = OpAccessChain %15 %46 %51
OpStore %61 %60
%64 = OpIAdd %14 %230 %26
%66 = OpIMul %14 %55 %31
%67 = OpIAdd %14 %64 %66
%70 = OpIAdd %14 %230 %26
%72 = OpIAdd %14 %70 %31
%73 = OpAccessChain %15 %46 %72
%74 = OpLoad %14 %73
%75 = OpAccessChain %15 %46 %67
OpStore %75 %74
OpBranch %37
%37 = OpLabel
%78 = OpIAdd %14 %230 %77
OpStore %32 %78
OpBranch %34
%36 = OpLabel
OpReturn
OpFunctionEnd
%8 = OpFunction %2 None %3
%9 = OpLabel
%79 = OpVariable %15 Function
%83 = OpVariable %15 Function
%87 = OpVariable %15 Function
%97 = OpVariable %45 Function
%80 = OpAccessChain %23 %20 %22
%81 = OpLoad %17 %80
%82 = OpConvertFToS %14 %81
OpStore %79 %82
%84 = OpAccessChain %23 %20 %28
%85 = OpLoad %17 %84
%86 = OpConvertFToS %14 %85
OpStore %83 %86
OpStore %87 %82
OpBranch %89
%89 = OpLabel
%231 = OpPhi %14 %82 %9 %127 %92
OpLoopMerge %91 %92 None
OpBranch %93
%93 = OpLabel
%96 = OpSLessThanEqual %41 %231 %86
OpBranchConditional %96 %90 %91
%90 = OpLabel
%100 = OpIAdd %14 %231 %82
%102 = OpIAdd %14 %100 %86
%105 = OpIAdd %14 %231 %82
%107 = OpIMul %14 %55 %86
%108 = OpIAdd %14 %105 %107
%109 = OpAccessChain %15 %97 %108
%110 = OpLoad %14 %109
%111 = OpAccessChain %15 %97 %102
OpStore %111 %110
%114 = OpIAdd %14 %231 %82
%116 = OpIMul %14 %55 %86
%117 = OpIAdd %14 %114 %116
%120 = OpIAdd %14 %231 %82
%122 = OpIAdd %14 %120 %86
%123 = OpAccessChain %15 %97 %122
%124 = OpLoad %14 %123
%125 = OpAccessChain %15 %97 %117
OpStore %125 %124
OpBranch %92
%92 = OpLabel
%127 = OpIAdd %14 %231 %77
OpStore %87 %127
OpBranch %89
%91 = OpLabel
OpReturn
OpFunctionEnd
%10 = OpFunction %2 None %3
%11 = OpLabel
%128 = OpVariable %15 Function
%132 = OpVariable %15 Function
%136 = OpVariable %15 Function
%146 = OpVariable %45 Function
%129 = OpAccessChain %23 %20 %22
%130 = OpLoad %17 %129
%131 = OpConvertFToS %14 %130
OpStore %128 %131
%133 = OpAccessChain %23 %20 %28
%134 = OpLoad %17 %133
%135 = OpConvertFToS %14 %134
OpStore %132 %135
OpStore %136 %131
OpBranch %138
%138 = OpLabel
%232 = OpPhi %14 %131 %11 %176 %141
OpLoopMerge %140 %141 None
OpBranch %142
%142 = OpLabel
%145 = OpSGreaterThan %41 %232 %135
OpBranchConditional %145 %139 %140
%139 = OpLabel
%149 = OpIAdd %14 %232 %131
%151 = OpIAdd %14 %149 %135
%154 = OpIAdd %14 %232 %131
%156 = OpIMul %14 %55 %135
%157 = OpIAdd %14 %154 %156
%158 = OpAccessChain %15 %146 %157
%159 = OpLoad %14 %158
%160 = OpAccessChain %15 %146 %151
OpStore %160 %159
%163 = OpIAdd %14 %232 %131
%165 = OpIMul %14 %55 %135
%166 = OpIAdd %14 %163 %165
%169 = OpIAdd %14 %232 %131
%171 = OpIAdd %14 %169 %135
%172 = OpAccessChain %15 %146 %171
%173 = OpLoad %14 %172
%174 = OpAccessChain %15 %146 %166
OpStore %174 %173
OpBranch %141
%141 = OpLabel
%176 = OpISub %14 %232 %77
OpStore %136 %176
OpBranch %138
%140 = OpLabel
OpReturn
OpFunctionEnd
%12 = OpFunction %2 None %3
%13 = OpLabel
%177 = OpVariable %15 Function
%181 = OpVariable %15 Function
%185 = OpVariable %15 Function
%195 = OpVariable %45 Function
%178 = OpAccessChain %23 %20 %22
%179 = OpLoad %17 %178
%180 = OpConvertFToS %14 %179
OpStore %177 %180
%182 = OpAccessChain %23 %20 %28
%183 = OpLoad %17 %182
%184 = OpConvertFToS %14 %183
OpStore %181 %184
OpStore %185 %180
OpBranch %187
%187 = OpLabel
%233 = OpPhi %14 %180 %13 %225 %190
OpLoopMerge %189 %190 None
OpBranch %191
%191 = OpLabel
%194 = OpSGreaterThanEqual %41 %233 %184
OpBranchConditional %194 %188 %189
%188 = OpLabel
%198 = OpIAdd %14 %233 %180
%200 = OpIAdd %14 %198 %184
%203 = OpIAdd %14 %233 %180
%205 = OpIMul %14 %55 %184
%206 = OpIAdd %14 %203 %205
%207 = OpAccessChain %15 %195 %206
%208 = OpLoad %14 %207
%209 = OpAccessChain %15 %195 %200
OpStore %209 %208
%212 = OpIAdd %14 %233 %180
%214 = OpIMul %14 %55 %184
%215 = OpIAdd %14 %212 %214
%218 = OpIAdd %14 %233 %180
%220 = OpIAdd %14 %218 %184
%221 = OpAccessChain %15 %195 %220
%222 = OpLoad %14 %221
%223 = OpAccessChain %15 %195 %215
OpStore %223 %222
OpBranch %190
%190 = OpLabel
%225 = OpISub %14 %233 %77
OpStore %185 %225
OpBranch %187
%189 = 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;
{
// 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* stores[2];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 35)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
stores[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 2; ++i) {
EXPECT_TRUE(stores[i]);
}
// 60 -> 61
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(60)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[0]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
// 74 -> 75
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(74)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[1]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
}
{
// 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* stores[2];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 90)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
stores[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 2; ++i) {
EXPECT_TRUE(stores[i]);
}
// 110 -> 111
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(110)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[0]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
// 124 -> 125
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(124)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[1]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
}
{
// 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* stores[2];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 139)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
stores[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 2; ++i) {
EXPECT_TRUE(stores[i]);
}
// 159 -> 160
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(159)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[0]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
// 173 -> 174
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(173)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[1]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
}
{
// 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* stores[2];
int stores_found = 0;
for (const Instruction& inst : *spvtest::GetBasicBlock(f, 188)) {
if (inst.opcode() == SpvOp::SpvOpStore) {
stores[stores_found] = &inst;
++stores_found;
}
}
for (int i = 0; i < 2; ++i) {
EXPECT_TRUE(stores[i]);
}
// 208 -> 209
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(208)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[0]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
// 222 -> 223
{
// Analyse and simplify the instruction behind the access chain of this
// load.
Instruction* load_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(context->get_def_use_mgr()
->GetDef(222)
->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* load = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(load_var));
// Analyse and simplify the instruction behind the access chain of this
// store.
Instruction* store_var = context->get_def_use_mgr()->GetDef(
context->get_def_use_mgr()
->GetDef(stores[1]->GetSingleWordInOperand(0))
->GetSingleWordInOperand(1));
SENode* store = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->AnalyzeInstruction(store_var));
SENode* delta = analysis.GetScalarEvolution()->SimplifyExpression(
analysis.GetScalarEvolution()->CreateSubtraction(load, store));
EXPECT_FALSE(analysis.IsProvablyOutsideOfLoopBounds(
loop, delta, store->AsSERecurrentNode()->GetCoefficient()));
}
}
}
} // namespace
} // namespace opt
} // namespace spvtools