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// Copyright (c) 2019 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 "source/fuzz/transformation_add_dead_break.h"
#include "gtest/gtest.h"
#include "source/fuzz/fuzzer_util.h"
#include "test/fuzz/fuzz_test_util.h"
namespace spvtools {
namespace fuzz {
namespace {
TEST(TransformationAddDeadBreakTest, BreaksOutOfSimpleIf) {
// For a simple if-then-else, checks that some dead break scenarios are
// possible, and that some invalid scenarios are indeed not allowed.
// The SPIR-V for this test is adapted from the following GLSL, by separating
// some assignments into their own basic blocks, and adding constants for true
// and false:
//
// void main() {
// int x;
// int y;
// x = 1;
// if (x < y) {
// x = 2;
// x = 3;
// } else {
// y = 2;
// y = 3;
// }
// x = y;
// }
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
OpName %8 "x"
OpName %11 "y"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%9 = OpConstant %6 1
%13 = OpTypeBool
%17 = OpConstant %6 2
%18 = OpConstant %6 3
%25 = OpConstantTrue %13
%26 = OpConstantFalse %13
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
%11 = OpVariable %7 Function
OpStore %8 %9
%10 = OpLoad %6 %8
%12 = OpLoad %6 %11
%14 = OpSLessThan %13 %10 %12
OpSelectionMerge %16 None
OpBranchConditional %14 %15 %19
%15 = OpLabel
OpStore %8 %17
OpBranch %21
%21 = OpLabel
OpStore %8 %18
OpBranch %22
%22 = OpLabel
OpBranch %16
%19 = OpLabel
OpStore %11 %17
OpBranch %23
%23 = OpLabel
OpStore %11 %18
OpBranch %24
%24 = OpLabel
OpBranch %16
%16 = OpLabel
%20 = OpLoad %6 %11
OpStore %8 %20
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto consumer = nullptr;
const auto context = BuildModule(env, consumer, shader, kFuzzAssembleOption);
spvtools::ValidatorOptions validator_options;
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
TransformationContext transformation_context(
MakeUnique<FactManager>(context.get()), validator_options);
const uint32_t merge_block = 16;
// These are all possibilities.
ASSERT_TRUE(TransformationAddDeadBreak(15, merge_block, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(15, merge_block, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(21, merge_block, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(21, merge_block, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(22, merge_block, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(22, merge_block, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(19, merge_block, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(19, merge_block, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(23, merge_block, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(23, merge_block, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(24, merge_block, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(24, merge_block, false, {})
.IsApplicable(context.get(), transformation_context));
// Inapplicable: 100 is not a block id.
ASSERT_FALSE(TransformationAddDeadBreak(100, merge_block, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(15, 100, true, {})
.IsApplicable(context.get(), transformation_context));
// Inapplicable: 24 is not a merge block.
ASSERT_FALSE(TransformationAddDeadBreak(15, 24, true, {})
.IsApplicable(context.get(), transformation_context));
// These are the transformations we will apply.
auto transformation1 = TransformationAddDeadBreak(15, merge_block, true, {});
auto transformation2 = TransformationAddDeadBreak(21, merge_block, false, {});
auto transformation3 = TransformationAddDeadBreak(22, merge_block, true, {});
auto transformation4 = TransformationAddDeadBreak(19, merge_block, false, {});
auto transformation5 = TransformationAddDeadBreak(23, merge_block, true, {});
auto transformation6 = TransformationAddDeadBreak(24, merge_block, false, {});
ASSERT_TRUE(
transformation1.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation1, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation2.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation2, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation3.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation3, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation4.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation4, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation5.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation5, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation6.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation6, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
std::string after_transformation = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
OpName %8 "x"
OpName %11 "y"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%9 = OpConstant %6 1
%13 = OpTypeBool
%17 = OpConstant %6 2
%18 = OpConstant %6 3
%25 = OpConstantTrue %13
%26 = OpConstantFalse %13
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
%11 = OpVariable %7 Function
OpStore %8 %9
%10 = OpLoad %6 %8
%12 = OpLoad %6 %11
%14 = OpSLessThan %13 %10 %12
OpSelectionMerge %16 None
OpBranchConditional %14 %15 %19
%15 = OpLabel
OpStore %8 %17
OpBranchConditional %25 %21 %16
%21 = OpLabel
OpStore %8 %18
OpBranchConditional %26 %16 %22
%22 = OpLabel
OpBranchConditional %25 %16 %16
%19 = OpLabel
OpStore %11 %17
OpBranchConditional %26 %16 %23
%23 = OpLabel
OpStore %11 %18
OpBranchConditional %25 %24 %16
%24 = OpLabel
OpBranchConditional %26 %16 %16
%16 = OpLabel
%20 = OpLoad %6 %11
OpStore %8 %20
OpReturn
OpFunctionEnd
)";
ASSERT_TRUE(IsEqual(env, after_transformation, context.get()));
}
TEST(TransformationAddDeadBreakTest, BreakOutOfNestedIfs) {
// Checks some allowed and disallowed scenarios for nests of ifs.
// The SPIR-V for this test is adapted from the following GLSL:
//
// void main() {
// int x;
// int y;
// x = 1;
// if (x < y) {
// x = 2;
// x = 3;
// if (x == y) {
// y = 3;
// }
// } else {
// y = 2;
// y = 3;
// }
// if (x == y) {
// x = 2;
// }
// x = y;
// }
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
OpName %8 "x"
OpName %11 "y"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%9 = OpConstant %6 1
%13 = OpTypeBool
%17 = OpConstant %6 2
%18 = OpConstant %6 3
%31 = OpConstantTrue %13
%32 = OpConstantFalse %13
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
%11 = OpVariable %7 Function
OpStore %8 %9
%10 = OpLoad %6 %8
%12 = OpLoad %6 %11
%14 = OpSLessThan %13 %10 %12
OpSelectionMerge %16 None
OpBranchConditional %14 %15 %24
%15 = OpLabel
OpStore %8 %17
OpBranch %33
%33 = OpLabel
OpStore %8 %18
%19 = OpLoad %6 %8
OpBranch %34
%34 = OpLabel
%20 = OpLoad %6 %11
%21 = OpIEqual %13 %19 %20
OpSelectionMerge %23 None
OpBranchConditional %21 %22 %23
%22 = OpLabel
OpStore %11 %18
OpBranch %35
%35 = OpLabel
OpBranch %23
%23 = OpLabel
OpBranch %16
%24 = OpLabel
OpStore %11 %17
OpBranch %36
%36 = OpLabel
OpStore %11 %18
OpBranch %16
%16 = OpLabel
%25 = OpLoad %6 %8
OpBranch %37
%37 = OpLabel
%26 = OpLoad %6 %11
%27 = OpIEqual %13 %25 %26
OpSelectionMerge %29 None
OpBranchConditional %27 %28 %29
%28 = OpLabel
OpStore %8 %17
OpBranch %38
%38 = OpLabel
OpBranch %29
%29 = OpLabel
%30 = OpLoad %6 %11
OpStore %8 %30
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto consumer = nullptr;
const auto context = BuildModule(env, consumer, shader, kFuzzAssembleOption);
spvtools::ValidatorOptions validator_options;
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
TransformationContext transformation_context(
MakeUnique<FactManager>(context.get()), validator_options);
// The header and merge blocks
const uint32_t header_inner = 34;
const uint32_t merge_inner = 23;
const uint32_t header_outer = 5;
const uint32_t merge_outer = 16;
const uint32_t header_after = 37;
const uint32_t merge_after = 29;
// The non-merge-nor-header blocks in each construct
const uint32_t inner_block_1 = 22;
const uint32_t inner_block_2 = 35;
const uint32_t outer_block_1 = 15;
const uint32_t outer_block_2 = 33;
const uint32_t outer_block_3 = 24;
const uint32_t outer_block_4 = 36;
const uint32_t after_block_1 = 28;
const uint32_t after_block_2 = 38;
// Fine to break from a construct to its merge
ASSERT_TRUE(TransformationAddDeadBreak(inner_block_1, merge_inner, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(inner_block_2, merge_inner, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(outer_block_1, merge_outer, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(outer_block_2, merge_outer, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(outer_block_3, merge_outer, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(outer_block_4, merge_outer, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(after_block_1, merge_after, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(after_block_2, merge_after, false, {})
.IsApplicable(context.get(), transformation_context));
// Not OK to break to the wrong merge (whether enclosing or not)
ASSERT_FALSE(TransformationAddDeadBreak(inner_block_1, merge_outer, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(inner_block_2, merge_after, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(outer_block_1, merge_inner, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(outer_block_2, merge_after, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(after_block_1, merge_inner, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(after_block_2, merge_outer, false, {})
.IsApplicable(context.get(), transformation_context));
// Not OK to break from header (as it does not branch unconditionally)
ASSERT_FALSE(TransformationAddDeadBreak(header_inner, merge_inner, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(header_outer, merge_outer, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(header_after, merge_after, true, {})
.IsApplicable(context.get(), transformation_context));
// Not OK to break to non-merge
ASSERT_FALSE(
TransformationAddDeadBreak(inner_block_1, inner_block_2, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(
TransformationAddDeadBreak(outer_block_2, after_block_1, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(outer_block_1, header_after, true, {})
.IsApplicable(context.get(), transformation_context));
auto transformation1 =
TransformationAddDeadBreak(inner_block_1, merge_inner, true, {});
auto transformation2 =
TransformationAddDeadBreak(inner_block_2, merge_inner, false, {});
auto transformation3 =
TransformationAddDeadBreak(outer_block_1, merge_outer, true, {});
auto transformation4 =
TransformationAddDeadBreak(outer_block_2, merge_outer, false, {});
auto transformation5 =
TransformationAddDeadBreak(outer_block_3, merge_outer, true, {});
auto transformation6 =
TransformationAddDeadBreak(outer_block_4, merge_outer, false, {});
auto transformation7 =
TransformationAddDeadBreak(after_block_1, merge_after, true, {});
auto transformation8 =
TransformationAddDeadBreak(after_block_2, merge_after, false, {});
ASSERT_TRUE(
transformation1.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation1, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation2.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation2, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation3.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation3, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation4.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation4, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation5.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation5, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation6.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation6, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation7.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation7, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation8.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation8, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
std::string after_transformation = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
OpName %8 "x"
OpName %11 "y"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%9 = OpConstant %6 1
%13 = OpTypeBool
%17 = OpConstant %6 2
%18 = OpConstant %6 3
%31 = OpConstantTrue %13
%32 = OpConstantFalse %13
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
%11 = OpVariable %7 Function
OpStore %8 %9
%10 = OpLoad %6 %8
%12 = OpLoad %6 %11
%14 = OpSLessThan %13 %10 %12
OpSelectionMerge %16 None
OpBranchConditional %14 %15 %24
%15 = OpLabel
OpStore %8 %17
OpBranchConditional %31 %33 %16
%33 = OpLabel
OpStore %8 %18
%19 = OpLoad %6 %8
OpBranchConditional %32 %16 %34
%34 = OpLabel
%20 = OpLoad %6 %11
%21 = OpIEqual %13 %19 %20
OpSelectionMerge %23 None
OpBranchConditional %21 %22 %23
%22 = OpLabel
OpStore %11 %18
OpBranchConditional %31 %35 %23
%35 = OpLabel
OpBranchConditional %32 %23 %23
%23 = OpLabel
OpBranch %16
%24 = OpLabel
OpStore %11 %17
OpBranchConditional %31 %36 %16
%36 = OpLabel
OpStore %11 %18
OpBranchConditional %32 %16 %16
%16 = OpLabel
%25 = OpLoad %6 %8
OpBranch %37
%37 = OpLabel
%26 = OpLoad %6 %11
%27 = OpIEqual %13 %25 %26
OpSelectionMerge %29 None
OpBranchConditional %27 %28 %29
%28 = OpLabel
OpStore %8 %17
OpBranchConditional %31 %38 %29
%38 = OpLabel
OpBranchConditional %32 %29 %29
%29 = OpLabel
%30 = OpLoad %6 %11
OpStore %8 %30
OpReturn
OpFunctionEnd
)";
ASSERT_TRUE(IsEqual(env, after_transformation, context.get()));
}
TEST(TransformationAddDeadBreakTest, BreakOutOfNestedSwitches) {
// Checks some allowed and disallowed scenarios for nests of switches.
// The SPIR-V for this test is adapted from the following GLSL:
//
// void main() {
// int x;
// int y;
// x = 1;
// if (x < y) {
// switch (x) {
// case 0:
// case 1:
// if (x == y) {
// }
// x = 2;
// break;
// case 3:
// if (y == 4) {
// y = 2;
// x = 3;
// }
// case 10:
// break;
// default:
// switch (y) {
// case 1:
// break;
// case 2:
// x = 4;
// y = 2;
// default:
// x = 3;
// break;
// }
// }
// } else {
// switch (y) {
// case 1:
// x = 4;
// case 2:
// y = 3;
// default:
// x = y;
// break;
// }
// }
// }
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
OpName %8 "x"
OpName %11 "y"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%9 = OpConstant %6 1
%13 = OpTypeBool
%29 = OpConstant %6 2
%32 = OpConstant %6 4
%36 = OpConstant %6 3
%60 = OpConstantTrue %13
%61 = OpConstantFalse %13
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
%11 = OpVariable %7 Function
OpStore %8 %9
%10 = OpLoad %6 %8
%12 = OpLoad %6 %11
%14 = OpSLessThan %13 %10 %12
OpSelectionMerge %16 None
OpBranchConditional %14 %15 %47
%15 = OpLabel
%17 = OpLoad %6 %8
OpSelectionMerge %22 None
OpSwitch %17 %21 0 %18 1 %18 3 %19 10 %20
%21 = OpLabel
%38 = OpLoad %6 %11
OpSelectionMerge %42 None
OpSwitch %38 %41 1 %39 2 %40
%41 = OpLabel
OpStore %8 %36
OpBranch %42
%39 = OpLabel
OpBranch %42
%40 = OpLabel
OpStore %8 %32
OpStore %11 %29
OpBranch %41
%42 = OpLabel
OpBranch %22
%18 = OpLabel
%23 = OpLoad %6 %8
OpBranch %63
%63 = OpLabel
%24 = OpLoad %6 %11
%25 = OpIEqual %13 %23 %24
OpSelectionMerge %27 None
OpBranchConditional %25 %26 %27
%26 = OpLabel
OpBranch %27
%27 = OpLabel
OpStore %8 %29
OpBranch %22
%19 = OpLabel
%31 = OpLoad %6 %11
%33 = OpIEqual %13 %31 %32
OpSelectionMerge %35 None
OpBranchConditional %33 %34 %35
%34 = OpLabel
OpStore %11 %29
OpBranch %62
%62 = OpLabel
OpStore %8 %36
OpBranch %35
%35 = OpLabel
OpBranch %20
%20 = OpLabel
OpBranch %22
%22 = OpLabel
OpBranch %16
%47 = OpLabel
%48 = OpLoad %6 %11
OpSelectionMerge %52 None
OpSwitch %48 %51 1 %49 2 %50
%51 = OpLabel
%53 = OpLoad %6 %11
OpStore %8 %53
OpBranch %52
%49 = OpLabel
OpStore %8 %32
OpBranch %50
%50 = OpLabel
OpStore %11 %36
OpBranch %51
%52 = OpLabel
OpBranch %16
%16 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto consumer = nullptr;
const auto context = BuildModule(env, consumer, shader, kFuzzAssembleOption);
spvtools::ValidatorOptions validator_options;
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
TransformationContext transformation_context(
MakeUnique<FactManager>(context.get()), validator_options);
// The header and merge blocks
const uint32_t header_outer_if = 5;
const uint32_t merge_outer_if = 16;
const uint32_t header_then_outer_switch = 15;
const uint32_t merge_then_outer_switch = 22;
const uint32_t header_then_inner_switch = 21;
const uint32_t merge_then_inner_switch = 42;
const uint32_t header_else_switch = 47;
const uint32_t merge_else_switch = 52;
const uint32_t header_inner_if_1 = 19;
const uint32_t merge_inner_if_1 = 35;
const uint32_t header_inner_if_2 = 63;
const uint32_t merge_inner_if_2 = 27;
// The non-merge-nor-header blocks in each construct
const uint32_t then_outer_switch_block_1 = 18;
const uint32_t then_inner_switch_block_1 = 39;
const uint32_t then_inner_switch_block_2 = 40;
const uint32_t then_inner_switch_block_3 = 41;
const uint32_t else_switch_block_1 = 49;
const uint32_t else_switch_block_2 = 50;
const uint32_t else_switch_block_3 = 51;
const uint32_t inner_if_1_block_1 = 34;
const uint32_t inner_if_1_block_2 = 62;
const uint32_t inner_if_2_block_1 = 26;
// Fine to branch straight to direct merge block for a construct
ASSERT_TRUE(TransformationAddDeadBreak(then_outer_switch_block_1,
merge_then_outer_switch, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(then_inner_switch_block_1,
merge_then_inner_switch, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(then_inner_switch_block_2,
merge_then_inner_switch, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(then_inner_switch_block_3,
merge_then_inner_switch, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(else_switch_block_1, merge_else_switch,
false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(else_switch_block_2, merge_else_switch,
true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(else_switch_block_3, merge_else_switch,
false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(
TransformationAddDeadBreak(inner_if_1_block_1, merge_inner_if_1, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(inner_if_1_block_2, merge_inner_if_1,
false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(
TransformationAddDeadBreak(inner_if_2_block_1, merge_inner_if_2, true, {})
.IsApplicable(context.get(), transformation_context));
// Not OK to break out of a switch from a selection construct inside the
// switch.
ASSERT_FALSE(TransformationAddDeadBreak(inner_if_1_block_1,
merge_then_outer_switch, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(inner_if_1_block_2,
merge_then_outer_switch, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(inner_if_2_block_1,
merge_then_outer_switch, true, {})
.IsApplicable(context.get(), transformation_context));
// Some miscellaneous inapplicable cases.
ASSERT_FALSE(
TransformationAddDeadBreak(header_outer_if, merge_outer_if, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(header_inner_if_1, inner_if_1_block_2,
false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(header_then_inner_switch,
header_then_outer_switch, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(header_else_switch,
then_inner_switch_block_3, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(header_inner_if_2, header_inner_if_2,
false, {})
.IsApplicable(context.get(), transformation_context));
auto transformation1 = TransformationAddDeadBreak(
then_outer_switch_block_1, merge_then_outer_switch, true, {});
auto transformation2 = TransformationAddDeadBreak(
then_inner_switch_block_1, merge_then_inner_switch, false, {});
auto transformation3 = TransformationAddDeadBreak(
then_inner_switch_block_2, merge_then_inner_switch, true, {});
auto transformation4 = TransformationAddDeadBreak(
then_inner_switch_block_3, merge_then_inner_switch, true, {});
auto transformation5 = TransformationAddDeadBreak(
else_switch_block_1, merge_else_switch, false, {});
auto transformation6 = TransformationAddDeadBreak(
else_switch_block_2, merge_else_switch, true, {});
auto transformation7 = TransformationAddDeadBreak(
else_switch_block_3, merge_else_switch, false, {});
auto transformation8 = TransformationAddDeadBreak(inner_if_1_block_1,
merge_inner_if_1, true, {});
auto transformation9 = TransformationAddDeadBreak(
inner_if_1_block_2, merge_inner_if_1, false, {});
auto transformation10 = TransformationAddDeadBreak(
inner_if_2_block_1, merge_inner_if_2, true, {});
ASSERT_TRUE(
transformation1.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation1, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation2.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation2, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation3.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation3, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation4.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation4, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation5.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation5, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation6.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation6, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation7.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation7, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation8.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation8, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation9.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation9, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation10.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation10, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
std::string after_transformation = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
OpName %8 "x"
OpName %11 "y"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%9 = OpConstant %6 1
%13 = OpTypeBool
%29 = OpConstant %6 2
%32 = OpConstant %6 4
%36 = OpConstant %6 3
%60 = OpConstantTrue %13
%61 = OpConstantFalse %13
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
%11 = OpVariable %7 Function
OpStore %8 %9
%10 = OpLoad %6 %8
%12 = OpLoad %6 %11
%14 = OpSLessThan %13 %10 %12
OpSelectionMerge %16 None
OpBranchConditional %14 %15 %47
%15 = OpLabel
%17 = OpLoad %6 %8
OpSelectionMerge %22 None
OpSwitch %17 %21 0 %18 1 %18 3 %19 10 %20
%21 = OpLabel
%38 = OpLoad %6 %11
OpSelectionMerge %42 None
OpSwitch %38 %41 1 %39 2 %40
%41 = OpLabel
OpStore %8 %36
OpBranchConditional %60 %42 %42
%39 = OpLabel
OpBranchConditional %61 %42 %42
%40 = OpLabel
OpStore %8 %32
OpStore %11 %29
OpBranchConditional %60 %41 %42
%42 = OpLabel
OpBranch %22
%18 = OpLabel
%23 = OpLoad %6 %8
OpBranchConditional %60 %63 %22
%63 = OpLabel
%24 = OpLoad %6 %11
%25 = OpIEqual %13 %23 %24
OpSelectionMerge %27 None
OpBranchConditional %25 %26 %27
%26 = OpLabel
OpBranchConditional %60 %27 %27
%27 = OpLabel
OpStore %8 %29
OpBranch %22
%19 = OpLabel
%31 = OpLoad %6 %11
%33 = OpIEqual %13 %31 %32
OpSelectionMerge %35 None
OpBranchConditional %33 %34 %35
%34 = OpLabel
OpStore %11 %29
OpBranchConditional %60 %62 %35
%62 = OpLabel
OpStore %8 %36
OpBranchConditional %61 %35 %35
%35 = OpLabel
OpBranch %20
%20 = OpLabel
OpBranch %22
%22 = OpLabel
OpBranch %16
%47 = OpLabel
%48 = OpLoad %6 %11
OpSelectionMerge %52 None
OpSwitch %48 %51 1 %49 2 %50
%51 = OpLabel
%53 = OpLoad %6 %11
OpStore %8 %53
OpBranchConditional %61 %52 %52
%49 = OpLabel
OpStore %8 %32
OpBranchConditional %61 %52 %50
%50 = OpLabel
OpStore %11 %36
OpBranchConditional %60 %51 %52
%52 = OpLabel
OpBranch %16
%16 = OpLabel
OpReturn
OpFunctionEnd
)";
ASSERT_TRUE(IsEqual(env, after_transformation, context.get()));
}
TEST(TransformationAddDeadBreakTest, BreakOutOfLoopNest) {
// Checks some allowed and disallowed scenarios for a nest of loops, including
// breaking from an if or switch right out of a loop.
// The SPIR-V for this test is adapted from the following GLSL:
//
// void main() {
// int x, y;
// do {
// x++;
// for (int j = 0; j < 100; j++) {
// y++;
// if (x == y) {
// x++;
// if (x == 2) {
// y++;
// }
// switch (x) {
// case 0:
// x = 2;
// default:
// break;
// }
// }
// }
// } while (x > y);
//
// for (int i = 0; i < 100; i++) {
// x++;
// }
// }
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
OpName %12 "x"
OpName %16 "j"
OpName %27 "y"
OpName %55 "i"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%10 = OpTypeInt 32 1
%11 = OpTypePointer Function %10
%14 = OpConstant %10 1
%17 = OpConstant %10 0
%24 = OpConstant %10 100
%25 = OpTypeBool
%38 = OpConstant %10 2
%67 = OpConstantTrue %25
%68 = OpConstantFalse %25
%4 = OpFunction %2 None %3
%5 = OpLabel
%12 = OpVariable %11 Function
%16 = OpVariable %11 Function
%27 = OpVariable %11 Function
%55 = OpVariable %11 Function
OpBranch %6
%6 = OpLabel
OpLoopMerge %8 %9 None
OpBranch %7
%7 = OpLabel
%13 = OpLoad %10 %12
%15 = OpIAdd %10 %13 %14
OpStore %12 %15
OpStore %16 %17
OpBranch %18
%18 = OpLabel
OpLoopMerge %20 %21 None
OpBranch %22
%22 = OpLabel
%23 = OpLoad %10 %16
%26 = OpSLessThan %25 %23 %24
OpBranchConditional %26 %19 %20
%19 = OpLabel
%28 = OpLoad %10 %27
%29 = OpIAdd %10 %28 %14
OpStore %27 %29
%30 = OpLoad %10 %12
%31 = OpLoad %10 %27
%32 = OpIEqual %25 %30 %31
OpSelectionMerge %34 None
OpBranchConditional %32 %33 %34
%33 = OpLabel
%35 = OpLoad %10 %12
%36 = OpIAdd %10 %35 %14
OpStore %12 %36
%37 = OpLoad %10 %12
%39 = OpIEqual %25 %37 %38
OpSelectionMerge %41 None
OpBranchConditional %39 %40 %41
%40 = OpLabel
%42 = OpLoad %10 %27
%43 = OpIAdd %10 %42 %14
OpStore %27 %43
OpBranch %41
%41 = OpLabel
%44 = OpLoad %10 %12
OpSelectionMerge %47 None
OpSwitch %44 %46 0 %45
%46 = OpLabel
OpBranch %47
%45 = OpLabel
OpStore %12 %38
OpBranch %46
%47 = OpLabel
OpBranch %34
%34 = OpLabel
OpBranch %21
%21 = OpLabel
%50 = OpLoad %10 %16
%51 = OpIAdd %10 %50 %14
OpStore %16 %51
OpBranch %18
%20 = OpLabel
OpBranch %9
%9 = OpLabel
%52 = OpLoad %10 %12
%53 = OpLoad %10 %27
%54 = OpSGreaterThan %25 %52 %53
OpBranchConditional %54 %6 %8
%8 = OpLabel
OpStore %55 %17
OpBranch %56
%56 = OpLabel
OpLoopMerge %58 %59 None
OpBranch %60
%60 = OpLabel
%61 = OpLoad %10 %55
%62 = OpSLessThan %25 %61 %24
OpBranchConditional %62 %57 %58
%57 = OpLabel
%63 = OpLoad %10 %12
%64 = OpIAdd %10 %63 %14
OpStore %12 %64
OpBranch %59
%59 = OpLabel
%65 = OpLoad %10 %55
%66 = OpIAdd %10 %65 %14
OpStore %55 %66
OpBranch %56
%58 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto consumer = nullptr;
const auto context = BuildModule(env, consumer, shader, kFuzzAssembleOption);
spvtools::ValidatorOptions validator_options;
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
TransformationContext transformation_context(
MakeUnique<FactManager>(context.get()), validator_options);
// The header and merge blocks
const uint32_t header_do_while = 6;
const uint32_t merge_do_while = 8;
const uint32_t header_for_j = 18;
const uint32_t merge_for_j = 20;
const uint32_t header_for_i = 56;
const uint32_t merge_for_i = 58;
const uint32_t header_switch = 41;
const uint32_t merge_switch = 47;
const uint32_t header_if_x_eq_y = 19;
const uint32_t merge_if_x_eq_y = 34;
const uint32_t header_if_x_eq_2 = 33;
const uint32_t merge_if_x_eq_2 = 41;
// Loop continue targets
const uint32_t continue_do_while = 9;
const uint32_t continue_for_j = 21;
const uint32_t continue_for_i = 59;
// Some blocks in these constructs
const uint32_t block_in_inner_if = 40;
const uint32_t block_switch_case = 46;
const uint32_t block_switch_default = 45;
const uint32_t block_in_for_i_loop = 57;
// Fine to break from any loop header to its merge
ASSERT_TRUE(
TransformationAddDeadBreak(header_do_while, merge_do_while, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(header_for_i, merge_for_i, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(header_for_j, merge_for_j, true, {})
.IsApplicable(context.get(), transformation_context));
// Fine to break from any of the blocks in constructs in the "for j" loop to
// that loop's merge
ASSERT_TRUE(
TransformationAddDeadBreak(block_in_inner_if, merge_for_j, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(
TransformationAddDeadBreak(block_switch_case, merge_for_j, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(
TransformationAddDeadBreak(block_switch_default, merge_for_j, false, {})
.IsApplicable(context.get(), transformation_context));
// Fine to break from the body of the "for i" loop to that loop's merge
ASSERT_TRUE(
TransformationAddDeadBreak(block_in_for_i_loop, merge_for_i, true, {})
.IsApplicable(context.get(), transformation_context));
// Not OK to break from multiple loops
ASSERT_FALSE(
TransformationAddDeadBreak(block_in_inner_if, merge_do_while, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(
TransformationAddDeadBreak(block_switch_case, merge_do_while, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(block_switch_default, merge_do_while,
false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(
TransformationAddDeadBreak(header_for_j, merge_do_while, true, {})
.IsApplicable(context.get(), transformation_context));
// Not OK to break loop from its continue construct, except from the back-edge
// block.
ASSERT_FALSE(
TransformationAddDeadBreak(continue_do_while, merge_do_while, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(continue_for_j, merge_for_j, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(continue_for_i, merge_for_i, true, {})
.IsApplicable(context.get(), transformation_context));
// Not OK to break out of multiple non-loop constructs if not breaking to a
// loop merge
ASSERT_FALSE(
TransformationAddDeadBreak(block_in_inner_if, merge_if_x_eq_y, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(
TransformationAddDeadBreak(block_switch_case, merge_if_x_eq_y, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(block_switch_default, merge_if_x_eq_y,
false, {})
.IsApplicable(context.get(), transformation_context));
// Some miscellaneous inapplicable transformations
ASSERT_FALSE(
TransformationAddDeadBreak(header_if_x_eq_2, header_if_x_eq_y, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(
TransformationAddDeadBreak(merge_if_x_eq_2, merge_switch, false, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(
TransformationAddDeadBreak(header_switch, header_switch, false, {})
.IsApplicable(context.get(), transformation_context));
auto transformation1 =
TransformationAddDeadBreak(header_do_while, merge_do_while, true, {});
auto transformation2 =
TransformationAddDeadBreak(header_for_i, merge_for_i, false, {});
auto transformation3 =
TransformationAddDeadBreak(header_for_j, merge_for_j, true, {});
auto transformation4 =
TransformationAddDeadBreak(block_in_inner_if, merge_for_j, false, {});
auto transformation5 =
TransformationAddDeadBreak(block_switch_case, merge_for_j, true, {});
auto transformation6 =
TransformationAddDeadBreak(block_switch_default, merge_for_j, false, {});
auto transformation7 =
TransformationAddDeadBreak(block_in_for_i_loop, merge_for_i, true, {});
ASSERT_TRUE(
transformation1.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation1, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation2.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation2, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation3.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation3, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation4.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation4, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation5.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation5, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation6.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation6, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation7.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation7, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
std::string after_transformation = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
OpName %12 "x"
OpName %16 "j"
OpName %27 "y"
OpName %55 "i"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%10 = OpTypeInt 32 1
%11 = OpTypePointer Function %10
%14 = OpConstant %10 1
%17 = OpConstant %10 0
%24 = OpConstant %10 100
%25 = OpTypeBool
%38 = OpConstant %10 2
%67 = OpConstantTrue %25
%68 = OpConstantFalse %25
%4 = OpFunction %2 None %3
%5 = OpLabel
%12 = OpVariable %11 Function
%16 = OpVariable %11 Function
%27 = OpVariable %11 Function
%55 = OpVariable %11 Function
OpBranch %6
%6 = OpLabel
OpLoopMerge %8 %9 None
OpBranchConditional %67 %7 %8
%7 = OpLabel
%13 = OpLoad %10 %12
%15 = OpIAdd %10 %13 %14
OpStore %12 %15
OpStore %16 %17
OpBranch %18
%18 = OpLabel
OpLoopMerge %20 %21 None
OpBranchConditional %67 %22 %20
%22 = OpLabel
%23 = OpLoad %10 %16
%26 = OpSLessThan %25 %23 %24
OpBranchConditional %26 %19 %20
%19 = OpLabel
%28 = OpLoad %10 %27
%29 = OpIAdd %10 %28 %14
OpStore %27 %29
%30 = OpLoad %10 %12
%31 = OpLoad %10 %27
%32 = OpIEqual %25 %30 %31
OpSelectionMerge %34 None
OpBranchConditional %32 %33 %34
%33 = OpLabel
%35 = OpLoad %10 %12
%36 = OpIAdd %10 %35 %14
OpStore %12 %36
%37 = OpLoad %10 %12
%39 = OpIEqual %25 %37 %38
OpSelectionMerge %41 None
OpBranchConditional %39 %40 %41
%40 = OpLabel
%42 = OpLoad %10 %27
%43 = OpIAdd %10 %42 %14
OpStore %27 %43
OpBranchConditional %68 %20 %41
%41 = OpLabel
%44 = OpLoad %10 %12
OpSelectionMerge %47 None
OpSwitch %44 %46 0 %45
%46 = OpLabel
OpBranchConditional %67 %47 %20
%45 = OpLabel
OpStore %12 %38
OpBranchConditional %68 %20 %46
%47 = OpLabel
OpBranch %34
%34 = OpLabel
OpBranch %21
%21 = OpLabel
%50 = OpLoad %10 %16
%51 = OpIAdd %10 %50 %14
OpStore %16 %51
OpBranch %18
%20 = OpLabel
OpBranch %9
%9 = OpLabel
%52 = OpLoad %10 %12
%53 = OpLoad %10 %27
%54 = OpSGreaterThan %25 %52 %53
OpBranchConditional %54 %6 %8
%8 = OpLabel
OpStore %55 %17
OpBranch %56
%56 = OpLabel
OpLoopMerge %58 %59 None
OpBranchConditional %68 %58 %60
%60 = OpLabel
%61 = OpLoad %10 %55
%62 = OpSLessThan %25 %61 %24
OpBranchConditional %62 %57 %58
%57 = OpLabel
%63 = OpLoad %10 %12
%64 = OpIAdd %10 %63 %14
OpStore %12 %64
OpBranchConditional %67 %59 %58
%59 = OpLabel
%65 = OpLoad %10 %55
%66 = OpIAdd %10 %65 %14
OpStore %55 %66
OpBranch %56
%58 = OpLabel
OpReturn
OpFunctionEnd
)";
ASSERT_TRUE(IsEqual(env, after_transformation, context.get()));
}
TEST(TransformationAddDeadBreakTest, NoBreakFromContinueConstruct) {
// Checks that it is illegal to break straight from a continue construct.
// The SPIR-V for this test is adapted from the following GLSL:
//
// void main() {
// for (int i = 0; i < 100; i++) {
// }
// }
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
OpName %8 "i"
OpDecorate %8 RelaxedPrecision
OpDecorate %15 RelaxedPrecision
OpDecorate %19 RelaxedPrecision
OpDecorate %21 RelaxedPrecision
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%9 = OpConstant %6 0
%16 = OpConstant %6 100
%17 = OpTypeBool
%22 = OpConstantTrue %17
%20 = OpConstant %6 1
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
OpStore %8 %9
OpBranch %10
%10 = OpLabel
OpLoopMerge %12 %13 None
OpBranch %14
%14 = OpLabel
%15 = OpLoad %6 %8
%18 = OpSLessThan %17 %15 %16
OpBranchConditional %18 %11 %12
%11 = OpLabel
OpBranch %13
%13 = OpLabel
%19 = OpLoad %6 %8
%21 = OpIAdd %6 %19 %20
OpBranch %23
%23 = OpLabel
OpStore %8 %21
OpBranch %10
%12 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto consumer = nullptr;
const auto context = BuildModule(env, consumer, shader, kFuzzAssembleOption);
spvtools::ValidatorOptions validator_options;
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
TransformationContext transformation_context(
MakeUnique<FactManager>(context.get()), validator_options);
// Not OK to break loop from its continue construct, except from the back-edge
// block.
ASSERT_FALSE(TransformationAddDeadBreak(13, 12, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_TRUE(TransformationAddDeadBreak(23, 12, true, {})
.IsApplicable(context.get(), transformation_context));
}
TEST(TransformationAddDeadBreakTest, BreakFromBackEdgeBlock) {
std::string reference_shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Vertex %10 "main"
; Types
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%4 = OpTypeInt 32 0
%5 = OpTypeBool
%6 = OpTypePointer Function %4
; Constants
%7 = OpConstant %4 0
%8 = OpConstant %4 1
%9 = OpConstantTrue %5
; main function
%10 = OpFunction %2 None %3
%11 = OpLabel
%12 = OpVariable %6 Function
OpStore %12 %7
OpBranch %13
%13 = OpLabel
OpLoopMerge %21 %18 None ; structured loop
OpBranch %14
%14 = OpLabel
%15 = OpLoad %4 %12
%16 = OpULessThan %5 %15 %8 ; i < 1 ?
OpBranchConditional %16 %17 %21 ; body or break
%17 = OpLabel ; body
OpBranch %18
%18 = OpLabel ; continue target does not strictly dominates the back-edge block
%19 = OpLoad %4 %12
%20 = OpIAdd %4 %19 %8 ; ++i
OpStore %12 %20
OpBranch %13
%21 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_5;
const auto consumer = nullptr;
const auto context =
BuildModule(env, consumer, reference_shader, kFuzzAssembleOption);
spvtools::ValidatorOptions validator_options;
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
TransformationContext transformation_context(
MakeUnique<FactManager>(context.get()), validator_options);
auto transformation = TransformationAddDeadBreak(18, 21, true, {});
ApplyAndCheckFreshIds(transformation, context.get(), &transformation_context);
std::string variant_shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Vertex %10 "main"
; Types
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%4 = OpTypeInt 32 0
%5 = OpTypeBool
%6 = OpTypePointer Function %4
; Constants
%7 = OpConstant %4 0
%8 = OpConstant %4 1
%9 = OpConstantTrue %5
; main function
%10 = OpFunction %2 None %3
%11 = OpLabel
%12 = OpVariable %6 Function
OpStore %12 %7
OpBranch %13
%13 = OpLabel
OpLoopMerge %21 %18 None ; structured loop
OpBranch %14
%14 = OpLabel
%15 = OpLoad %4 %12
%16 = OpULessThan %5 %15 %8 ; i < 1 ?
OpBranchConditional %16 %17 %21 ; body or break
%17 = OpLabel ; body
OpBranch %18
%18 = OpLabel ; continue target does not strictly dominates the back-edge block
%19 = OpLoad %4 %12
%20 = OpIAdd %4 %19 %8 ; ++i
OpStore %12 %20
OpBranchConditional %9 %13 %21
%21 = OpLabel
OpReturn
OpFunctionEnd
)";
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(IsEqual(env, variant_shader, context.get()));
}
TEST(TransformationAddDeadBreakTest, SelectionInContinueConstruct) {
// Considers some scenarios where there is a selection construct in a loop's
// continue construct.
// The SPIR-V for this test is adapted from the following GLSL:
//
// void main() {
// for (int i = 0; i < 100; i = (i < 50 ? i + 2 : i + 1)) {
// }
// }
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
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 %6 100
%17 = OpTypeBool
%99 = OpConstantTrue %17
%20 = OpConstant %6 50
%26 = OpConstant %6 2
%30 = OpConstant %6 1
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
%22 = OpVariable %7 Function
OpStore %8 %9
OpBranch %10
%10 = OpLabel
OpLoopMerge %12 %13 None
OpBranch %14
%14 = OpLabel
%15 = OpLoad %6 %8
%18 = OpSLessThan %17 %15 %16
OpBranchConditional %18 %11 %12
%11 = OpLabel
OpBranch %13
%13 = OpLabel
%19 = OpLoad %6 %8
%21 = OpSLessThan %17 %19 %20
OpSelectionMerge %24 None
OpBranchConditional %21 %23 %28
%23 = OpLabel
%25 = OpLoad %6 %8
OpBranch %100
%100 = OpLabel
%27 = OpIAdd %6 %25 %26
OpStore %22 %27
OpBranch %24
%28 = OpLabel
%29 = OpLoad %6 %8
OpBranch %101
%101 = OpLabel
%31 = OpIAdd %6 %29 %30
OpStore %22 %31
OpBranch %24
%24 = OpLabel
%32 = OpLoad %6 %22
OpStore %8 %32
OpBranch %10
%12 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto consumer = nullptr;
const auto context = BuildModule(env, consumer, shader, kFuzzAssembleOption);
spvtools::ValidatorOptions validator_options;
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
TransformationContext transformation_context(
MakeUnique<FactManager>(context.get()), validator_options);
const uint32_t loop_merge = 12;
const uint32_t selection_merge = 24;
const uint32_t in_selection_1 = 23;
const uint32_t in_selection_2 = 100;
const uint32_t in_selection_3 = 28;
const uint32_t in_selection_4 = 101;
// Not OK to jump from the selection to the loop merge, as this would break
// from the loop's continue construct.
ASSERT_FALSE(TransformationAddDeadBreak(in_selection_1, loop_merge, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(in_selection_2, loop_merge, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(in_selection_3, loop_merge, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(TransformationAddDeadBreak(in_selection_4, loop_merge, true, {})
.IsApplicable(context.get(), transformation_context));
// But fine to jump from the selection to its merge.
auto transformation1 =
TransformationAddDeadBreak(in_selection_1, selection_merge, true, {});
auto transformation2 =
TransformationAddDeadBreak(in_selection_2, selection_merge, true, {});
auto transformation3 =
TransformationAddDeadBreak(in_selection_3, selection_merge, true, {});
auto transformation4 =
TransformationAddDeadBreak(in_selection_4, selection_merge, true, {});
ASSERT_TRUE(
transformation1.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation1, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation2.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation2, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation3.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation3, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation4.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation4, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
std::string after_transformation = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
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 %6 100
%17 = OpTypeBool
%99 = OpConstantTrue %17
%20 = OpConstant %6 50
%26 = OpConstant %6 2
%30 = OpConstant %6 1
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
%22 = OpVariable %7 Function
OpStore %8 %9
OpBranch %10
%10 = OpLabel
OpLoopMerge %12 %13 None
OpBranch %14
%14 = OpLabel
%15 = OpLoad %6 %8
%18 = OpSLessThan %17 %15 %16
OpBranchConditional %18 %11 %12
%11 = OpLabel
OpBranch %13
%13 = OpLabel
%19 = OpLoad %6 %8
%21 = OpSLessThan %17 %19 %20
OpSelectionMerge %24 None
OpBranchConditional %21 %23 %28
%23 = OpLabel
%25 = OpLoad %6 %8
OpBranchConditional %99 %100 %24
%100 = OpLabel
%27 = OpIAdd %6 %25 %26
OpStore %22 %27
OpBranchConditional %99 %24 %24
%28 = OpLabel
%29 = OpLoad %6 %8
OpBranchConditional %99 %101 %24
%101 = OpLabel
%31 = OpIAdd %6 %29 %30
OpStore %22 %31
OpBranchConditional %99 %24 %24
%24 = OpLabel
%32 = OpLoad %6 %22
OpStore %8 %32
OpBranch %10
%12 = OpLabel
OpReturn
OpFunctionEnd
)";
ASSERT_TRUE(IsEqual(env, after_transformation, context.get()));
}
TEST(TransformationAddDeadBreakTest, LoopInContinueConstruct) {
// Considers some scenarios where there is a loop in a loop's continue
// construct.
// The SPIR-V for this test is adapted from the following GLSL, with inlining
// applied so that the loop from foo is in the main loop's continue construct:
//
// int foo() {
// int result = 0;
// for (int j = 0; j < 10; j++) {
// result++;
// }
// return result;
// }
//
// void main() {
// for (int i = 0; i < 100; i += foo()) {
// }
// }
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
OpName %31 "i"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypeFunction %6
%10 = OpTypePointer Function %6
%12 = OpConstant %6 0
%20 = OpConstant %6 10
%21 = OpTypeBool
%100 = OpConstantTrue %21
%24 = OpConstant %6 1
%38 = OpConstant %6 100
%4 = OpFunction %2 None %3
%5 = OpLabel
%43 = OpVariable %10 Function
%44 = OpVariable %10 Function
%45 = OpVariable %10 Function
%31 = OpVariable %10 Function
OpStore %31 %12
OpBranch %32
%32 = OpLabel
OpLoopMerge %34 %35 None
OpBranch %36
%36 = OpLabel
%37 = OpLoad %6 %31
%39 = OpSLessThan %21 %37 %38
OpBranchConditional %39 %33 %34
%33 = OpLabel
OpBranch %35
%35 = OpLabel
OpStore %43 %12
OpStore %44 %12
OpBranch %46
%46 = OpLabel
OpLoopMerge %47 %48 None
OpBranch %49
%49 = OpLabel
%50 = OpLoad %6 %44
%51 = OpSLessThan %21 %50 %20
OpBranchConditional %51 %52 %47
%52 = OpLabel
%53 = OpLoad %6 %43
OpBranch %101
%101 = OpLabel
%54 = OpIAdd %6 %53 %24
OpStore %43 %54
OpBranch %48
%48 = OpLabel
%55 = OpLoad %6 %44
%56 = OpIAdd %6 %55 %24
OpStore %44 %56
OpBranch %46
%47 = OpLabel
%57 = OpLoad %6 %43
OpStore %45 %57
%40 = OpLoad %6 %45
%41 = OpLoad %6 %31
%42 = OpIAdd %6 %41 %40
OpStore %31 %42
OpBranch %32
%34 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto consumer = nullptr;
const auto context = BuildModule(env, consumer, shader, kFuzzAssembleOption);
spvtools::ValidatorOptions validator_options;
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
TransformationContext transformation_context(
MakeUnique<FactManager>(context.get()), validator_options);
const uint32_t outer_loop_merge = 34;
const uint32_t outer_loop_block = 33;
const uint32_t inner_loop_merge = 47;
const uint32_t inner_loop_block = 52;
// Some inapplicable cases
ASSERT_FALSE(
TransformationAddDeadBreak(inner_loop_block, outer_loop_merge, true, {})
.IsApplicable(context.get(), transformation_context));
ASSERT_FALSE(
TransformationAddDeadBreak(outer_loop_block, inner_loop_merge, true, {})
.IsApplicable(context.get(), transformation_context));
auto transformation1 =
TransformationAddDeadBreak(inner_loop_block, inner_loop_merge, true, {});
auto transformation2 =
TransformationAddDeadBreak(outer_loop_block, outer_loop_merge, true, {});
ASSERT_TRUE(
transformation1.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation1, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation2.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation2, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
std::string after_transformation = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
OpName %31 "i"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypeFunction %6
%10 = OpTypePointer Function %6
%12 = OpConstant %6 0
%20 = OpConstant %6 10
%21 = OpTypeBool
%100 = OpConstantTrue %21
%24 = OpConstant %6 1
%38 = OpConstant %6 100
%4 = OpFunction %2 None %3
%5 = OpLabel
%43 = OpVariable %10 Function
%44 = OpVariable %10 Function
%45 = OpVariable %10 Function
%31 = OpVariable %10 Function
OpStore %31 %12
OpBranch %32
%32 = OpLabel
OpLoopMerge %34 %35 None
OpBranch %36
%36 = OpLabel
%37 = OpLoad %6 %31
%39 = OpSLessThan %21 %37 %38
OpBranchConditional %39 %33 %34
%33 = OpLabel
OpBranchConditional %100 %35 %34
%35 = OpLabel
OpStore %43 %12
OpStore %44 %12
OpBranch %46
%46 = OpLabel
OpLoopMerge %47 %48 None
OpBranch %49
%49 = OpLabel
%50 = OpLoad %6 %44
%51 = OpSLessThan %21 %50 %20
OpBranchConditional %51 %52 %47
%52 = OpLabel
%53 = OpLoad %6 %43
OpBranchConditional %100 %101 %47
%101 = OpLabel
%54 = OpIAdd %6 %53 %24
OpStore %43 %54
OpBranch %48
%48 = OpLabel
%55 = OpLoad %6 %44
%56 = OpIAdd %6 %55 %24
OpStore %44 %56
OpBranch %46
%47 = OpLabel
%57 = OpLoad %6 %43
OpStore %45 %57
%40 = OpLoad %6 %45
%41 = OpLoad %6 %31
%42 = OpIAdd %6 %41 %40
OpStore %31 %42
OpBranch %32
%34 = OpLabel
OpReturn
OpFunctionEnd
)";
ASSERT_TRUE(IsEqual(env, after_transformation, context.get()));
}
TEST(TransformationAddDeadBreakTest, PhiInstructions) {
// Checks that the transformation works in the presence of phi instructions.
// The SPIR-V for this test is adapted from the following GLSL, with a bit of
// extra and artificial work to get some interesting uses of OpPhi:
//
// void main() {
// int x; int y;
// float f;
// x = 2;
// f = 3.0;
// if (x > y) {
// x = 3;
// f = 4.0;
// } else {
// x = x + 2;
// f = f + 10.0;
// }
// while (x < y) {
// x = x + 1;
// f = f + 1.0;
// }
// y = x;
// f = f + 3.0;
// }
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
OpName %8 "x"
OpName %12 "f"
OpName %15 "y"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%9 = OpConstant %6 2
%10 = OpTypeFloat 32
%11 = OpTypePointer Function %10
%13 = OpConstant %10 3
%17 = OpTypeBool
%80 = OpConstantTrue %17
%21 = OpConstant %6 3
%22 = OpConstant %10 4
%27 = OpConstant %10 10
%38 = OpConstant %6 1
%41 = OpConstant %10 1
%46 = OpUndef %6
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
%12 = OpVariable %11 Function
%15 = OpVariable %7 Function
OpStore %8 %9
OpStore %12 %13
%18 = OpSGreaterThan %17 %9 %46
OpSelectionMerge %20 None
OpBranchConditional %18 %19 %23
%19 = OpLabel
OpStore %8 %21
OpStore %12 %22
OpBranch %20
%23 = OpLabel
%25 = OpIAdd %6 %9 %9
OpStore %8 %25
OpBranch %70
%70 = OpLabel
%28 = OpFAdd %10 %13 %27
OpStore %12 %28
OpBranch %20
%20 = OpLabel
%52 = OpPhi %10 %22 %19 %28 %70
%48 = OpPhi %6 %21 %19 %25 %70
OpBranch %29
%29 = OpLabel
%51 = OpPhi %10 %52 %20 %42 %32
%47 = OpPhi %6 %48 %20 %39 %32
OpLoopMerge %31 %32 None
OpBranch %33
%33 = OpLabel
%36 = OpSLessThan %17 %47 %46
OpBranchConditional %36 %30 %31
%30 = OpLabel
%39 = OpIAdd %6 %47 %38
OpStore %8 %39
OpBranch %75
%75 = OpLabel
%42 = OpFAdd %10 %51 %41
OpStore %12 %42
OpBranch %32
%32 = OpLabel
OpBranch %29
%31 = OpLabel
%71 = OpPhi %6 %47 %33
%72 = OpPhi %10 %51 %33
OpStore %15 %71
%45 = OpFAdd %10 %72 %13
OpStore %12 %45
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto consumer = nullptr;
const auto context = BuildModule(env, consumer, shader, kFuzzAssembleOption);
spvtools::ValidatorOptions validator_options;
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
TransformationContext transformation_context(
MakeUnique<FactManager>(context.get()), validator_options);
// Some inapplicable transformations
// Not applicable because there is already an edge 19->20, so the OpPhis at 20
// do not need to be updated
ASSERT_FALSE(TransformationAddDeadBreak(19, 20, true, {13, 21})
.IsApplicable(context.get(), transformation_context));
// Not applicable because two OpPhis (not zero) need to be updated at 20
ASSERT_FALSE(TransformationAddDeadBreak(23, 20, true, {})
.IsApplicable(context.get(), transformation_context));
// Not applicable because two OpPhis (not just one) need to be updated at 20
ASSERT_FALSE(TransformationAddDeadBreak(23, 20, true, {13})
.IsApplicable(context.get(), transformation_context));
// Not applicable because the given ids do not have types that match the
// OpPhis at 20, in order
ASSERT_FALSE(TransformationAddDeadBreak(23, 20, true, {21, 13})
.IsApplicable(context.get(), transformation_context));
// Not applicable because id 23 is a label
ASSERT_FALSE(TransformationAddDeadBreak(23, 20, true, {21, 23})
.IsApplicable(context.get(), transformation_context));
// Not applicable because 101 is not an id
ASSERT_FALSE(TransformationAddDeadBreak(23, 20, true, {21, 101})
.IsApplicable(context.get(), transformation_context));
// Not applicable because ids 51 and 47 are not available at the end of block
// 23
ASSERT_FALSE(TransformationAddDeadBreak(23, 20, true, {51, 47})
.IsApplicable(context.get(), transformation_context));
// Not applicable because OpConstantFalse is not present in the module
ASSERT_FALSE(TransformationAddDeadBreak(19, 20, false, {})
.IsApplicable(context.get(), transformation_context));
auto transformation1 = TransformationAddDeadBreak(19, 20, true, {});
auto transformation2 = TransformationAddDeadBreak(23, 20, true, {13, 21});
auto transformation3 = TransformationAddDeadBreak(70, 20, true, {});
auto transformation4 = TransformationAddDeadBreak(30, 31, true, {21, 13});
auto transformation5 = TransformationAddDeadBreak(75, 31, true, {47, 51});
ASSERT_TRUE(
transformation1.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation1, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation2.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation2, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation3.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation3, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation4.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation4, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(
transformation5.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation5, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
std::string after_transformation = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
OpName %8 "x"
OpName %12 "f"
OpName %15 "y"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%9 = OpConstant %6 2
%10 = OpTypeFloat 32
%11 = OpTypePointer Function %10
%13 = OpConstant %10 3
%17 = OpTypeBool
%80 = OpConstantTrue %17
%21 = OpConstant %6 3
%22 = OpConstant %10 4
%27 = OpConstant %10 10
%38 = OpConstant %6 1
%41 = OpConstant %10 1
%46 = OpUndef %6
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
%12 = OpVariable %11 Function
%15 = OpVariable %7 Function
OpStore %8 %9
OpStore %12 %13
%18 = OpSGreaterThan %17 %9 %46
OpSelectionMerge %20 None
OpBranchConditional %18 %19 %23
%19 = OpLabel
OpStore %8 %21
OpStore %12 %22
OpBranchConditional %80 %20 %20
%23 = OpLabel
%25 = OpIAdd %6 %9 %9
OpStore %8 %25
OpBranchConditional %80 %70 %20
%70 = OpLabel
%28 = OpFAdd %10 %13 %27
OpStore %12 %28
OpBranchConditional %80 %20 %20
%20 = OpLabel
%52 = OpPhi %10 %22 %19 %28 %70 %13 %23
%48 = OpPhi %6 %21 %19 %25 %70 %21 %23
OpBranch %29
%29 = OpLabel
%51 = OpPhi %10 %52 %20 %42 %32
%47 = OpPhi %6 %48 %20 %39 %32
OpLoopMerge %31 %32 None
OpBranch %33
%33 = OpLabel
%36 = OpSLessThan %17 %47 %46
OpBranchConditional %36 %30 %31
%30 = OpLabel
%39 = OpIAdd %6 %47 %38
OpStore %8 %39
OpBranchConditional %80 %75 %31
%75 = OpLabel
%42 = OpFAdd %10 %51 %41
OpStore %12 %42
OpBranchConditional %80 %32 %31
%32 = OpLabel