MCompare::CompareType BaselineInspector::expectedCompareType(jsbytecode* pc) {
ICStub* first = monomorphicStub(pc);
ICStub* second = nullptr;
if (!first && !dimorphicStub(pc, &first, &second)) {
return MCompare::Compare_Unknown;
}
if (ICStub* fallback = second ? second->next() : first->next()) {
MOZ_ASSERT(fallback->isFallback());
if (fallback->toFallbackStub()->state().hasFailures()) {
return MCompare::Compare_Unknown;
}
}
MCompare::CompareType first_type =
ParseCacheIRStubForCompareType(first->toCacheIR_Regular());
if (!second) {
return first_type;
}
MCompare::CompareType second_type =
ParseCacheIRStubForCompareType(second->toCacheIR_Regular());
if (first_type == MCompare::Compare_Unknown ||
second_type == MCompare::Compare_Unknown) {
return MCompare::Compare_Unknown;
}
if (first_type == second_type) {
return first_type;
}
return CompatibleType(first_type, second_type);
}
