r9ir 1.0.0

Rewrite 9cc in Rust
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152

#![allow(non_camel_case_types)]

use crate::gen_ir::*;
use crate::parse::*;
use std::cell::RefCell;
use std::rc::Rc;

fn regno(r: Option<Rc<RefCell<Reg>>>) -> i32 {
    if r.is_none() {
        return 0;
    }
    let rr = r.unwrap().clone();
    let rn = rr.borrow().rn;
    if rn != -1 {
        return rr.borrow().rn;
    }
    return rr.borrow().vn;
}

fn tostr_call(ir: & IR) -> String {
    let mut s = String::new();
    s.push_str(&format!("r{} = {}(", regno(ir.r0.clone()), ir.name));
    for i in 0..ir.nargs {
        if i != 0 {
            s.push_str(", ");
        }
        s.push_str(&format!("r{}", regno(Some(ir.args[i].clone()))));
    }
    s.push_str(")");
    return s;
}

pub fn tostr(ir: & IR) -> String {
    let r0 = regno(ir.r0.clone());
    let r1 = regno(ir.r1.clone());
    let r2 = regno(ir.r2.clone());

    match ir.op {
        IRType::ADD => format!("r{} = r{} + r{}", r0, r1, r2),
        IRType::CALL => tostr_call(ir),
        IRType::DIV => format!("r{} = r{} / r{}", r0, r1, r2),
        IRType::IMM => format!("r{} = {}", r0, ir.imm),
        IRType::JMP => {
            let bb1 = ir.bb1.clone().unwrap();
            let bbarg = ir.bbarg.clone();
            if bbarg.is_some() {
                return format!("JMP .L{} (r{})", bb1.borrow().label, regno(bbarg))
            }
            return format!("JMP .L{}", bb1.borrow().label);
        }
        IRType::LABEL_ADDR => format!("r{} = .L{}", r0, ir.label),
        IRType::EQ => format!("r{} = r{} == r{}", r0, r1, r2),
        IRType::NE => format!("r{} = r{} != r{}", r0, r1, r2),
        IRType::LE => format!("r{} = r{} <= r{}", r0, r1, r2),
        IRType::LT => format!("r{} = r{} < r{}", r0, r1, r2),
        IRType::AND => format!("r{} = r{} & r{}", r0, r1, r2),
        IRType::OR => format!("r{} = r{} | r{}", r0, r1, r2),
        IRType::XOR => format!("r{} = r{} ^ r{}", r0, r1, r2),
        IRType::SHL => format!("r{} = r{} << r{}", r0, r1, r2),
        IRType::SHR => format!("r{} = r{} >> r{}", r0, r1, r2),
        IRType::LOAD => format!("LOAD{} r{}, r{}", ir.size, r0, r2),
        IRType::LOAD_SPILL => format!("LOAD_SPILL r{}, {}", r0, ir.imm),
        IRType::MOD => format!("r{} = r{} % r{}", r0, r1, r2),
        IRType::MOV => format!("r{} = r{}", r0, r2),
        IRType::MUL => format!("r{} = r{} * r{}", r0, r1, r2),
        IRType::NOP => "NOP".to_string(),
        IRType::RETURN => format!("RET r{}", r2),
        IRType::STORE => format!("STORE{} r{}, r{}", ir.size, r1, r2),
        IRType::STORE_ARG => {
            let var = ir.var.clone().unwrap();
            let name = var.borrow().name.clone();
            let offset = var.borrow().offset;
            format!("STORE_ARG{} {} {} ({})", ir.size, ir.imm, name, offset)
        }
        IRType::STORE_SPILL => format!("STORE_SPILL r{}, {}", r1, ir.imm),
        IRType::SUB => format!("r{} = r{} - r{}", r0, r1, r2),
        IRType::BPREL => {
            let var = ir.var.clone().unwrap();
            let name = var.borrow().name.clone();
            let offset = var.borrow().offset;
            format!("BPREL r{} {} ({})", r0, name, offset)
        }
        IRType::BR => {
            let bb1 = ir.bb1.clone().unwrap();
            let bb2 = ir.bb2.clone().unwrap();
            return format!("BR r{} .L{} .L{}", r2, bb1.borrow().label, bb2.borrow().label);
        }
    }
}

fn print_rel(name: & str, v: Vec<Rc<RefCell<BB>>>) {
    if v.len() == 0 {
        return;
    }
    eprint!(" {}=", name);
    for i in 0..v.len() {
        let bb = &v[i];
        if i > 0 {
            eprint!(",");
        }
        eprint!(".L{}", bb.borrow().label);
    }
}

fn print_regs(name: & str, v: Vec<Rc<RefCell<Reg>>>) {
    if v.len() == 0 {
        return;
    }
    eprint!(" {}=", name);
    for i in 0..v.len() {
        let r = &v[i];
        if i > 0 {
            eprint!(",");
        }
        eprint!("r{}", regno(Some(r.clone())));
    }
}

fn print_bb(bb: Rc<RefCell<BB>>) {
    let label = bb.borrow().label.clone();
    let param = bb.borrow().param.clone();
    if param.is_some() {
        eprint!(".L{}({})", label, regno(param));
    } else {
        eprint!(".L{}", label);
    }

    print_rel("pred", bb.borrow().pred.clone());
    print_rel("succ", bb.borrow().succ.clone());
    let def_regs = bb.borrow().def_regs.clone();
    let in_regs = bb.borrow().in_regs.clone();
    let out_regs = bb.borrow().out_regs.clone();
    print_regs("defs", def_regs.borrow().clone());
    print_regs("in", in_regs.borrow().clone());
    print_regs("out", out_regs.borrow().clone());
    eprintln!();
}

pub fn dump_ir(irv: Vec<Rc<RefCell<Function>>>) {
    for fun in irv.iter() {
        eprintln!("{}:", fun.borrow().name);

        for bb in fun.borrow().bbs.iter() {
            print_bb(bb.clone());

            for i in bb.borrow().ir.iter() {
                eprintln!("\t{}", tostr(&i.borrow()).to_string());
            }
        }
    }
}