compiler
A toy compiler for a syntax subset of c++ written in python
requires python3, antlr4, antlr4-python3-runtime
in the follwing instructions, you may replace python3 with python and pip3 with pip in your enviroment
To install antlr4-python3-runtime, run pip3 install antlr4-python3-runtime==4.6
install
For installing, run python3 setup.py install
run a demo
- First, make a new file, write some codes (like the follwing) in it, name it test.c
class A {
int foo() {
if (a < 0) {
return a++;
}
else {
return a--;
}
}
int a;
}
int sum(int i) {
int s = 0;
int j;
for (j = 0; j < i; j++) {
s += j;
}
return s;
}
int main() {
A a;
a.foo();
int s = sum(10);
return 0;
}
- Then, run python3 -m compiler -in test.c -out out.asm
- At last, run cat out.asm, you may see the follwing assembly codes
section .data
section .text
ALIGN 16
sum__func__:
sum_begin0:
mov rax, 0
mov rsi, 0
loop_test2:
cmp rsi, rdi
jge loop_end3
loop_begin1:
add rsi, 1
jmp loop_test2
loop_end3:
sum_end4:
ret
ALIGN 16
:
sub rsp, 8
main_begin5:
call A_foo__func__
mov rdi, 10
call sum__func__
mov rax, 0
main_end6:
add rsp, 8
ret
ALIGN 16
A_foo__func__:
foo_begin7:
mov rsi, qword [rdi]
cmp rsi, 0
jge if_else9
if_then8:
mov rax, qword [rdi]
mov rsi, qword [rdi]
add rsi, 1
mov qword [rdi], rsi
foo_end11:
ret
cfg_added_0:
if_end10:
jmp foo_end11
if_else9:
mov rax, qword [rdi]
mov rsi, qword [rdi]
sub rsi, 1
mov qword [rdi], rsi
jmp foo_end11