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BigInt support in the constant system

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This commit is contained in:
gingerBill
2018-07-28 00:41:31 +01:00
parent d0e04bf569
commit c3c7834246
13 changed files with 1663 additions and 340 deletions
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src/check_stmt.cpp
+10 -11
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@@ -260,18 +260,17 @@ Type *check_assignment_variable(CheckerContext *ctx, Operand *lhs, Operand *rhs)
if (rhs->mode == Addressing_Constant) {
ExactValue v = exact_value_to_integer(rhs->value);
if (v.kind == ExactValue_Integer) {
i64 i = v.value_integer;
u64 u = bit_cast<u64>(i);
u64 umax = ~cast(u64)0ull;
if (lhs_bits < 64) {
umax = (1ull << cast(u64)lhs_bits) - 1ull;
}
i64 imax = 1ll << (cast(i64)lhs_bits-1ll);
BigInt i = v.value_integer;
if (!i.neg) {
u64 imax_ = ~cast(u64)0ull;
if (lhs_bits < 64) {
imax_ = (1ull << cast(u64)lhs_bits) - 1ull;
}
bool ok = !(u < 0 || u > umax);
if (ok) {
return rhs->type;
BigInt imax = big_int_make_u64(imax_);
if (big_int_cmp(&i, &imax) > 0) {
return rhs->type;
}
}
}
} else if (is_type_integer(rhs->type)) {