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Subset and superset operators for bit_set: < <= > >=

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gingerBill
2018-11-25 16:19:17 +00:00
parent 444f4f446a
commit e496b95881
6 changed files with 127 additions and 15 deletions
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32
src/ir.cpp
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@@ -3823,6 +3823,37 @@ irValue *ir_emit_comp(irProcedure *proc, TokenKind op_kind, irValue *left, irVal
return ir_emit_runtime_call(proc, runtime_proc, args);
}
if (is_type_bit_set(a)) {
switch (op_kind) {
case Token_Lt:
case Token_LtEq:
case Token_Gt:
case Token_GtEq:
{
Type *it = bit_set_to_int(a);
irValue *lhs = ir_emit_bitcast(proc, left, it);
irValue *rhs = ir_emit_bitcast(proc, right, it);
irValue *res = ir_emit_arith(proc, Token_And, lhs, rhs, it);
if (op_kind == Token_Lt || op_kind == Token_LtEq) {
// (lhs & rhs) == lhs
res = ir_emit(proc, ir_instr_binary_op(proc, Token_CmpEq, res, lhs, t_llvm_bool));
} else if (op_kind == Token_Gt || op_kind == Token_GtEq) {
// (lhs & rhs) == rhs
res = ir_emit(proc, ir_instr_binary_op(proc, Token_CmpEq, res, rhs, t_llvm_bool));
}
// NOTE(bill): Strict subsets
if (op_kind == Token_Lt || op_kind == Token_Gt) {
// res &~ (lhs == rhs)
irValue *eq = ir_emit(proc, ir_instr_binary_op(proc, Token_CmpEq, lhs, rhs, t_llvm_bool));
res = ir_emit_arith(proc, Token_AndNot, res, eq, t_llvm_bool);
}
return res;
}
}
}
return ir_emit(proc, ir_instr_binary_op(proc, op_kind, left, right, t_llvm_bool));
}
@@ -6168,7 +6199,6 @@ irValue *ir_build_expr_internal(irProcedure *proc, Ast *expr) {
Type *key_type = rt->BitSet.elem;
GB_ASSERT(are_types_identical(ir_type(left), key_type));
Type *it = bit_set_to_int(rt);
left = ir_emit_conv(proc, left, it);