1 // Copyright (c) 2020 Google LLC
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include "source/fuzz/comparator_deep_blocks_first.h"
16
17 #include "gtest/gtest.h"
18 #include "source/fuzz/fact_manager/fact_manager.h"
19 #include "source/fuzz/fuzzer_util.h"
20 #include "source/fuzz/pseudo_random_generator.h"
21 #include "source/fuzz/transformation_context.h"
22 #include "test/fuzz/fuzz_test_util.h"
23
24 namespace spvtools {
25 namespace fuzz {
26 namespace {
27
28 std::string shader = R"(
29 OpCapability Shader
30 %1 = OpExtInstImport "GLSL.std.450"
31 OpMemoryModel Logical GLSL450
32 OpEntryPoint Fragment %2 "main"
33 OpExecutionMode %2 OriginUpperLeft
34 OpSource ESSL 310
35 %3 = OpTypeVoid
36 %4 = OpTypeFunction %3
37 %5 = OpTypeBool
38 %6 = OpConstantTrue %5
39 %7 = OpTypeInt 32 1
40 %8 = OpTypePointer Function %7
41 %9 = OpConstant %7 1
42 %10 = OpConstant %7 10
43 %11 = OpConstant %7 2
44 %2 = OpFunction %3 None %4
45 %12 = OpLabel
46 OpSelectionMerge %13 None
47 OpBranchConditional %6 %14 %15
48 %14 = OpLabel
49 OpBranch %13
50 %15 = OpLabel
51 OpBranch %16
52 %16 = OpLabel
53 OpLoopMerge %17 %18 None
54 OpBranch %19
55 %19 = OpLabel
56 OpBranchConditional %6 %20 %17
57 %20 = OpLabel
58 OpSelectionMerge %21 None
59 OpBranchConditional %6 %22 %23
60 %22 = OpLabel
61 OpBranch %21
62 %23 = OpLabel
63 OpBranch %21
64 %21 = OpLabel
65 OpBranch %18
66 %18 = OpLabel
67 OpBranch %16
68 %17 = OpLabel
69 OpBranch %13
70 %13 = OpLabel
71 OpReturn
72 OpFunctionEnd
73 )";
74
TEST(ComparatorDeepBlocksFirstTest,Compare)75 TEST(ComparatorDeepBlocksFirstTest, Compare) {
76 const auto env = SPV_ENV_UNIVERSAL_1_5;
77 const auto consumer = nullptr;
78 const auto context = BuildModule(env, consumer, shader, kFuzzAssembleOption);
79 spvtools::ValidatorOptions validator_options;
80 ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
81 kConsoleMessageConsumer));
82 TransformationContext transformation_context(
83 MakeUnique<FactManager>(context.get()), validator_options);
84 auto is_deeper = ComparatorDeepBlocksFirst(context.get());
85
86 // The block ids and the corresponding depths are:
87 // 12, 13 -> depth 0
88 // 14, 15, 16, 17 -> depth 1
89 // 18, 19, 20, 21 -> depth 2
90 // 22, 23 -> depth 3
91
92 // Perform some comparisons and check that they return true iff the first
93 // block is deeper than the second.
94 ASSERT_FALSE(is_deeper(12, 12));
95 ASSERT_FALSE(is_deeper(12, 13));
96 ASSERT_FALSE(is_deeper(12, 14));
97 ASSERT_FALSE(is_deeper(12, 18));
98 ASSERT_FALSE(is_deeper(12, 22));
99 ASSERT_TRUE(is_deeper(14, 12));
100 ASSERT_FALSE(is_deeper(14, 15));
101 ASSERT_FALSE(is_deeper(15, 14));
102 ASSERT_FALSE(is_deeper(14, 18));
103 ASSERT_TRUE(is_deeper(18, 12));
104 ASSERT_TRUE(is_deeper(18, 16));
105 }
106
TEST(ComparatorDeepBlocksFirstTest,Sort)107 TEST(ComparatorDeepBlocksFirstTest, Sort) {
108 const auto env = SPV_ENV_UNIVERSAL_1_5;
109 const auto consumer = nullptr;
110 const auto context = BuildModule(env, consumer, shader, kFuzzAssembleOption);
111 spvtools::ValidatorOptions validator_options;
112 ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
113 kConsoleMessageConsumer));
114 TransformationContext transformation_context(
115 MakeUnique<FactManager>(context.get()), validator_options);
116 // Check that, sorting using the comparator, the blocks are ordered from more
117 // deeply nested to less deeply nested.
118 // 17 has depth 1, 20 has depth 2, 13 has depth 0.
119 std::vector<opt::BasicBlock*> blocks = {context->get_instr_block(17),
120 context->get_instr_block(20),
121 context->get_instr_block(13)};
122
123 std::sort(blocks.begin(), blocks.end(),
124 ComparatorDeepBlocksFirst(context.get()));
125
126 // Check that the blocks are in the correct order.
127 ASSERT_EQ(blocks[0]->id(), 20);
128 ASSERT_EQ(blocks[1]->id(), 17);
129 ASSERT_EQ(blocks[2]->id(), 13);
130 }
131 } // namespace
132 } // namespace fuzz
133 } // namespace spvtools
134