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3 changes: 3 additions & 0 deletions src/tools/fuzzing.h
Original file line number Diff line number Diff line change
Expand Up @@ -477,6 +477,9 @@ class TranslateToFuzzReader {
Expression* makeGlobalGet(Type type);
Expression* makeGlobalSet(Type type);
Expression* makeTupleMake(Type type);
Expression* makeWideIntAddSub(Type type);
Expression* makeWideIntMul(Type type);
Expression* makeWideIntExpression(Type type);
Expression* makeTupleExtract(Type type);
Expression* makePointer();
Expression* makeNonAtomicLoad(Type type);
Expand Down
40 changes: 36 additions & 4 deletions src/tools/fuzzing/fuzzing.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -2813,7 +2813,11 @@ Expression* TranslateToFuzzReader::_makeConcrete(Type type) {
&Self::makeStringGet);
}
if (type.isTuple()) {
options.add(FeatureSet::Multivalue, &Self::makeTupleMake);
if (type == Types::getI64Pair() && oneIn(2)) {
options.add(FeatureSet::WideArithmetic, &Self::makeWideIntExpression);
} else {
options.add(FeatureSet::Multivalue, &Self::makeTupleMake);
}
}
if (type.isRef()) {
auto heapType = type.getHeapType();
Expand Down Expand Up @@ -3496,6 +3500,30 @@ Expression* TranslateToFuzzReader::makeTupleMake(Type type) {
return builder.makeTupleMake(std::move(elements));
}

Expression* TranslateToFuzzReader::makeWideIntAddSub(Type type) {
assert(wasm.features.hasWideArithmetic());
assert(type == Types::getI64Pair());
auto op = oneIn(2) ? AddInt128 : SubInt128;
auto* leftLow = make(Type::i64);
auto* leftHigh = make(Type::i64);
auto* rightLow = make(Type::i64);
auto* rightHigh = make(Type::i64);
return builder.makeWideIntAddSub(op, leftLow, leftHigh, rightLow, rightHigh);
}

Expression* TranslateToFuzzReader::makeWideIntMul(Type type) {
assert(wasm.features.hasWideArithmetic());
assert(type == Types::getI64Pair());
auto op = oneIn(2) ? MulWideSInt64 : MulWideUInt64;
auto* left = make(Type::i64);
auto* right = make(Type::i64);
return builder.makeWideIntMul(op, left, right);
}

Expression* TranslateToFuzzReader::makeWideIntExpression(Type type) {
return oneIn(2) ? makeWideIntAddSub(type) : makeWideIntMul(type);
}

Expression* TranslateToFuzzReader::makeTupleExtract(Type type) {
// Tuples can require locals in binary format conversions.
if (!type.isDefaultable()) {
Expand Down Expand Up @@ -6426,9 +6454,13 @@ Type TranslateToFuzzReader::getMVPType() {
}

Type TranslateToFuzzReader::getTupleType() {
if (wasm.features.hasWideArithmetic() && oneIn(2)) {
return Types::getI64Pair();
}

std::vector<Type> elements;
size_t maxElements = 2 + upTo(fuzzParams->MAX_TUPLE_SIZE - 1);
for (size_t i = 0; i < maxElements; ++i) {
size_t numElements = 2 + upTo(fuzzParams->MAX_TUPLE_SIZE - 2);
Comment thread
stevenfontanella marked this conversation as resolved.
for (size_t i = 0; i < numElements; ++i) {
auto type = getSingleConcreteType();
// Don't add a non-defaultable type into a tuple, as currently we can't
// spill them into locals (that would require a "let").
Expand All @@ -6443,7 +6475,7 @@ Type TranslateToFuzzReader::getTupleType() {
}

Type TranslateToFuzzReader::getConcreteType() {
if (wasm.features.hasMultivalue() && oneIn(5)) {
if (wasm.features.hasMultivalue() && oneIn(2)) {
return getTupleType();
} else {
return getSingleConcreteType();
Expand Down
2 changes: 1 addition & 1 deletion src/tools/fuzzing/heap-types.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -422,7 +422,7 @@ struct HeapTypeGeneratorImpl {
}

Type generateTupleType(Shareability share) {
std::vector<Type> types(2 + rand.upTo(params.MAX_TUPLE_SIZE - 1));
std::vector<Type> types(2 + rand.upTo(params.MAX_TUPLE_SIZE - 2));
for (auto& type : types) {
type = generateSingleType(share);
}
Expand Down
2 changes: 1 addition & 1 deletion src/tools/fuzzing/parameters.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -26,7 +26,7 @@ void FuzzParams::setDefaults() {

MAX_GLOBALS = 30;

MAX_TUPLE_SIZE = 6;
MAX_TUPLE_SIZE = 7;

MAX_STRUCT_SIZE = 6;

Expand Down
Binary file modified test/lit/fuzz-import.wast.dat
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94 changes: 49 additions & 45 deletions test/passes/translate-to-fuzz_all-features_metrics_noprint.txt
Original file line number Diff line number Diff line change
@@ -1,55 +1,59 @@
Metrics
total
[exports] : 10
[funcs] : 5
[exports] : 16
[funcs] : 21
[globals] : 2
[imports] : 13
[imports] : 14
[memories] : 1
[memory-data] : 16
[table-data] : 2
[table-data] : 3
[tables] : 2
[tags] : 3
[total] : 704
[vars] : 26
ArrayNewFixed : 6
AtomicFence : 3
Binary : 30
Block : 130
BrOn : 6
Break : 23
Call : 30
CallRef : 2
Const : 103
Drop : 10
GlobalGet : 44
GlobalSet : 42
I31Get : 3
If : 39
Load : 6
LocalGet : 25
LocalSet : 27
Loop : 16
[tags] : 2
[total] : 694
[vars] : 70
ArrayNewFixed : 4
AtomicFence : 1
AtomicNotify : 3
Binary : 34
Block : 122
BrOn : 1
Break : 9
Call : 32
CallIndirect : 2
Const : 144
Drop : 18
GlobalGet : 54
GlobalSet : 54
I31Get : 1
If : 38
Load : 2
LocalGet : 12
LocalSet : 8
Loop : 6
MemoryInit : 1
Nop : 7
Pop : 6
RefEq : 1
RefFunc : 11
RefI31 : 10
RefNull : 10
RefTest : 7
Return : 3
Nop : 10
Pop : 3
RefAs : 2
RefEq : 3
RefFunc : 5
RefI31 : 12
RefIsNull : 1
RefNull : 1
RefTest : 1
Return : 4
SIMDExtract : 2
Select : 1
Store : 2
StringConst : 7
StringEq : 1
StringMeasure : 2
StringWTF16Get : 2
StructNew : 8
TableSet : 2
Throw : 2
Try : 6
TryTable : 6
StringConst : 8
StringMeasure : 1
StructNew : 3
Switch : 1
TableSet : 1
Throw : 3
ThrowRef : 1
Try : 4
TryTable : 5
TupleExtract : 3
TupleMake : 5
Unary : 35
Unreachable : 21
TupleMake : 6
Unary : 37
Unreachable : 28
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