branch_with_result/
branch_with_result.rs

1use std::ptr::eq;
2use gnu_libjit::{Abi, Context, Label};
3fn main() {
4    let mut context = Context::new();
5    context.build_start();
6
7
8    let i32_type = Context::int_type();
9    let mut func = context.function(Abi::Cdecl, i32_type, vec![i32_type, i32_type]).unwrap();
10
11
12    let result = func.alloca(4);
13
14    let a = func.arg(0).unwrap();
15    let b = func.arg(1).unwrap();
16    let a_eq_b = func.insn_eq(&a, &b);
17    let mut done_label = Label::new();
18    let mut eq_label = Label::new();
19
20    func.insn_branch_if(&a_eq_b, &mut eq_label);
21    let a_minus_b = func.insn_sub(&a, &b);
22    func.insn_store(&result, &a_minus_b);
23    func.insn_branch(&mut done_label);
24    func.insn_label(&mut eq_label);
25    let a_plus_b = func.insn_add(&a, &b);
26    func.insn_store(&result, &a_plus_b);
27    func.insn_label(&mut done_label);
28    let ret = func.insn_load(&result);
29    let hundred = func.create_int_constant(100);
30    let ret = func.insn_add(&ret, &hundred);
31    func.insn_return(&ret);
32
33    println!("{}", func.dump().unwrap());
34
35    func.compile();
36    println!("{}", func.dump().unwrap());
37    context.build_end();
38
39
40    let result: extern "C" fn(i32, i32) -> i32 = func.to_closure();
41    println!("{} == 102", result(1,1));
42    println!("{} == 101", result(3,2));
43}
44
45/*
46fn(a,b) {
47    x ;
48    if a == b {
49        x = a + b;
50    } else {
51        x = a - b;
52    }
53    return x + 100;
54 */
branch_with_result/branch_with_result.rs

branch_with_result/
branch_with_result.rs
