MCompare::CompareType
BaselineInspector::expectedCompareType(jsbytecode *pc)
{
ICStub *first = monomorphicStub(pc), *second = NULL;
if (!first && !dimorphicStub(pc, &first, &second))
return MCompare::Compare_Unknown;
if (CanUseInt32Compare(first->kind()) && (!second || CanUseInt32Compare(second->kind())))
return MCompare::Compare_Int32;
if (CanUseDoubleCompare(first->kind()) && (!second || CanUseDoubleCompare(second->kind()))) {
ICCompare_NumberWithUndefined *coerce =
first->isCompare_NumberWithUndefined()
? first->toCompare_NumberWithUndefined()
: (second && second->isCompare_NumberWithUndefined())
? second->toCompare_NumberWithUndefined()
: NULL;
if (coerce) {
return coerce->lhsIsUndefined()
? MCompare::Compare_DoubleMaybeCoerceLHS
: MCompare::Compare_DoubleMaybeCoerceRHS;
}
return MCompare::Compare_Double;
}
return MCompare::Compare_Unknown;
}
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->toCompare_Fallback()->hadUnoptimizableAccess())
return MCompare::Compare_Unknown;
}
if (CanUseInt32Compare(first->kind()) && (!second || CanUseInt32Compare(second->kind()))) {
ICCompare_Int32WithBoolean* coerce =
first->isCompare_Int32WithBoolean()
? first->toCompare_Int32WithBoolean()
: ((second && second->isCompare_Int32WithBoolean())
? second->toCompare_Int32WithBoolean()
: nullptr);
if (coerce) {
return coerce->lhsIsInt32()
? MCompare::Compare_Int32MaybeCoerceRHS
: MCompare::Compare_Int32MaybeCoerceLHS;
}
return MCompare::Compare_Int32;
}
if (CanUseDoubleCompare(first->kind()) && (!second || CanUseDoubleCompare(second->kind()))) {
ICCompare_NumberWithUndefined* coerce =
first->isCompare_NumberWithUndefined()
? first->toCompare_NumberWithUndefined()
: (second && second->isCompare_NumberWithUndefined())
? second->toCompare_NumberWithUndefined()
: nullptr;
if (coerce) {
return coerce->lhsIsUndefined()
? MCompare::Compare_DoubleMaybeCoerceLHS
: MCompare::Compare_DoubleMaybeCoerceRHS;
}
return MCompare::Compare_Double;
}
return MCompare::Compare_Unknown;
}
