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spirv-fuzz: Fix vector width issue in 'add equation instructions' pass (#3223)

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Fixes #3213.
This commit is contained in:
Alastair Donaldson 2020-03-12 10:56:11 +00:00 committed by GitHub
parent dd3d91691f
commit 1af1df3b23
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 53 additions and 5 deletions
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9
source/fuzz/fuzzer_pass_add_equation_instructions.cpp
View File

@ -201,9 +201,12 @@ FuzzerPassAddEquationInstructions::RestrictToVectorWidth(
std::vector<opt::Instruction*> result;
for (auto& inst : instructions) {
auto type = GetIRContext()->get_type_mgr()->GetType(inst->type_id());
if ((vector_width == 1 && !type->AsVector()) ||
(vector_width > 1 &&
type->AsVector()->element_count() == vector_width)) {
// Get the vector width of |inst|, which is 1 if |inst| is a scalar and is
// otherwise derived from its vector type.
uint32_t other_vector_width =
type->AsVector() ? type->AsVector()->element_count() : 1;
// Keep |inst| if the vector widths match.
if (vector_width == other_vector_width) {
result.push_back(inst);
}
}

49
test/fuzz/fuzzer_replayer_test.cpp
View File

@ -1515,6 +1515,44 @@ const std::string kTestShader4 = R"(
OpFunctionEnd
)";
// The SPIR-V comes from the following GLSL:
//
// #version 310 es
// precision highp float;
//
// layout(location = 0) out vec4 color;
//
// void main()
// {
// color = vec4(1.0, 0.0, 0.0, 1.0);
// }
const std::string kTestShader5 = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main" %9
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
OpName %9 "color"
OpDecorate %9 Location 0
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeFloat 32
%7 = OpTypeVector %6 4
%8 = OpTypePointer Output %7
%9 = OpVariable %8 Output
%10 = OpConstant %6 1
%11 = OpConstant %6 0
%12 = OpConstantComposite %7 %10 %11 %11 %10
%4 = OpFunction %2 None %3
%5 = OpLabel
OpStore %9 %12
OpReturn
OpFunctionEnd
)";
void AddConstantUniformFact(protobufs::FactSequence* facts,
uint32_t descriptor_set, uint32_t binding,
std::vector<uint32_t>&& indices, uint32_t value) {
@ -1552,8 +1590,8 @@ void RunFuzzerAndReplayer(const std::string& shader,
ASSERT_TRUE(t.Validate(binary_in));
std::vector<fuzzerutil::ModuleSupplier> donor_suppliers;
for (auto donor :
{&kTestShader1, &kTestShader2, &kTestShader3, &kTestShader4}) {
for (auto donor : {&kTestShader1, &kTestShader2, &kTestShader3, &kTestShader4,
&kTestShader5}) {
donor_suppliers.emplace_back([donor]() {
return BuildModule(env, kConsoleMessageConsumer, *donor,
kFuzzAssembleOption);
@ -1636,6 +1674,13 @@ TEST(FuzzerReplayerTest, Miscellaneous4) {
RunFuzzerAndReplayer(kTestShader4, facts, 14, kNumFuzzerRuns);
}
TEST(FuzzerReplayerTest, Miscellaneous5) {
// Do some fuzzer runs, starting from an initial seed of 29 (seed value chosen
// arbitrarily).
RunFuzzerAndReplayer(kTestShader5, protobufs::FactSequence(), 29,
kNumFuzzerRuns);
}
} // namespace
} // namespace fuzz
} // namespace spvtools