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[HVX] Fix DistributeShiftsAsMuls #7083

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Oct 14, 2022
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[HVX] Fix DistributeShiftsAsMuls #7083

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8 changes: 6 additions & 2 deletions src/HexagonOptimize.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2172,13 +2172,17 @@ class DistributeShiftsAsMuls : public IRMutator {
const Cast *cast_a = a.as<Cast>();
bool is_widening_cast = cast_a && cast_a->type.bits() >= cast_a->value.type().bits() * 2;
if (is_widening_cast || Call::as_intrinsic(a, {Call::widening_add, Call::widening_mul, Call::widening_sub})) {
return mutate(distribute(a, make_one(a.type()) << *const_b));
const uint64_t const_m = 1ull << *const_b;
Expr b = make_const(a.type(), const_m);
return mutate(distribute(a, b));
}
}
} else if (op->is_intrinsic(Call::widening_shift_left)) {
if (const uint64_t *const_b = as_const_uint(op->args[1])) {
const uint64_t const_m = 1ull << *const_b;
Expr b = make_const(op->type, const_m);
Expr a = Cast::make(op->type, op->args[0]);
return mutate(distribute(a, make_one(a.type()) << *const_b));
return mutate(distribute(a, b));
}
}
return IRMutator::visit(op);
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