sl_compiler/compile/
compile_call.rs

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
use crate::{compile, CompileState, SloshVm};
use compile_state::state::SloshVmTrait;
use slvm::{VMResult, Value, BMOV, CALL, CALLM, CONST, MOV, TCALL, TCALLM};

fn compile_params(
    env: &mut SloshVm,
    state: &mut CompileState,
    cdr: &[Value],
    result: usize,
    tail: bool,
) -> VMResult<()> {
    if !cdr.is_empty() {
        for (i, r) in cdr.iter().enumerate() {
            compile(env, state, *r, result + i)?;
        }
        let line = env.own_line();
        if tail {
            state
                .chunk
                .encode3(BMOV, 1, result as u16, cdr.len() as u16, line)?;
        }
    }
    Ok(())
}

pub(crate) fn compile_call(
    env: &mut SloshVm,
    state: &mut CompileState,
    callable: Value,
    cdr: &[Value],
    result: usize,
) -> VMResult<()> {
    let b_reg = result + cdr.len() + 1;
    if b_reg > state.max_regs {
        state.max_regs = b_reg;
    }
    let const_i = state.add_constant(callable);
    let tail = state.tail && state.defers == 0;
    state.tail = false;
    compile_params(env, state, cdr, result + 1, tail)?;
    let line = env.own_line();
    state
        .chunk
        .encode2(CONST, b_reg as u16, const_i as u16, line)?;
    if tail {
        state
            .chunk
            .encode2(TCALL, b_reg as u16, cdr.len() as u16, line)?;
    } else {
        state
            .chunk
            .encode3(CALL, b_reg as u16, cdr.len() as u16, result as u16, line)?;
    }
    Ok(())
}

pub(crate) fn compile_callg(
    env: &mut SloshVm,
    state: &mut CompileState,
    global: u32,
    cdr: &[Value],
    result: usize,
) -> VMResult<()> {
    let tail = state.tail && state.defers == 0;
    state.tail = false;
    compile_params(env, state, cdr, result + 1, tail)?;
    let line = env.own_line();
    if tail {
        state.chunk.encode_tcallg(global, cdr.len() as u16, line)?;
    } else {
        state
            .chunk
            .encode_callg(global, cdr.len() as u16, result as u16, line)?;
    }
    Ok(())
}

pub(crate) fn compile_call_reg(
    env: &mut SloshVm,
    state: &mut CompileState,
    reg: u16,
    cdr: &[Value],
    result: usize,
) -> VMResult<()> {
    let tail = state.tail && state.defers == 0;
    state.tail = false;
    if tail {
        if result as u16 + 1 != reg {
            state
                .chunk
                .encode2(MOV, result as u16 + 1, reg, env.own_line())?;
        }
        // Lie about this being a tail call because we can not emit the BMOV yet.
        compile_params(env, state, cdr, result + 2, false)?;
        let b_reg = result + cdr.len() + 3;
        if b_reg > state.max_regs {
            state.max_regs = b_reg;
        }
        if result + 1 != b_reg {
            state
                .chunk
                .encode2(MOV, b_reg as u16, result as u16 + 1, env.own_line())?;
        }
        state
            .chunk
            .encode3(BMOV, 1, result as u16 + 2, cdr.len() as u16, env.own_line())?;
        state
            .chunk
            .encode2(TCALL, b_reg as u16, cdr.len() as u16, env.own_line())?;
    } else {
        compile_params(env, state, cdr, result + 1, tail)?;
        state
            .chunk
            .encode3(CALL, reg, cdr.len() as u16, result as u16, env.own_line())?;
    }
    Ok(())
}

pub(crate) fn compile_call_myself(
    env: &mut SloshVm,
    state: &mut CompileState,
    cdr: &[Value],
    result: usize,
    force_tail: bool,
) -> VMResult<()> {
    let tail = force_tail || (state.tail && state.defers == 0);
    state.tail = false;
    compile_params(env, state, cdr, result + 1, tail)?;
    let line = env.own_line();
    if tail {
        state.chunk.encode1(TCALLM, cdr.len() as u16, line)?;
    } else {
        state
            .chunk
            .encode2(CALLM, cdr.len() as u16, result as u16, line)?;
    }
    Ok(())
}