A compiler term project for item03 as CompilerCS302 of Chungnam National University.
We made a Mini C compiler which works with LLVM Lite for a backend and Antlr for a frontend. This compiler generates LLVM IR Codes, assembly codes for target machine and CFG Graph.
We tesed on Ubuntu 16.04 and python2.
- sudo apt-get install antlr4
- pip install antlr4-python2-runtime
- conda install llvmlite
- pip install graphviz
python main.py sourcecode.c
int fib(int n)
{
if (n < 2)
return n;
return fib(n-1) + fib(n-2);
}
int main()
{
int k = 10;
int result;
k = fib(k);
return k;
}; ModuleID = '<string>'
target triple = "x86_64-pc-linux-gnu"
; Function Attrs: nounwind readnone
define i32 @fib(i32 %n) #0 {
fib:
%.5 = icmp slt i32 %n, 2
br i1 %.5, label %fib.if, label %fib.endif
fib.if: ; preds = %fib
ret i32 %n
fib.endif: ; preds = %fib
%.10 = add i32 %n, -1
%.11 = tail call i32 @fib(i32 %.10)
%.13 = add i32 %n, -2
%.14 = tail call i32 @fib(i32 %.13)
%.15 = add i32 %.14, %.11
ret i32 %.15
}
; Function Attrs: nounwind readnone
define i32 @main() #0 {
main:
%.4 = tail call i32 @fib(i32 10)
ret i32 %.4
}
attributes #0 = { nounwind readnone }
.text
.file "<string>"
.globl fib
.align 16, 0x90
.type fib,@function
fib:
pushq %rbp
pushq %r14
pushq %rbx
movl %edi, %ebx
cmpl $1, %ebx
jg .LBB0_3
movl %ebx, %eax
jmp .LBB0_2
.LBB0_3:
leal -1(%rbx), %edi
movabsq $fib, %r14
callq *%r14
movl %eax, %ebp
addl $-2, %ebx
movl %ebx, %edi
callq *%r14
addl %ebp, %eax
.LBB0_2:
popq %rbx
popq %r14
popq %rbp
retq
.Lfunc_end0:
.size fib, .Lfunc_end0-fib
.globl main
.align 16, 0x90
.type main,@function
main:
movabsq $fib, %rax
movl $10, %edi
jmpq *%rax
.Lfunc_end1:
.size main, .Lfunc_end1-main
.section ".note.GNU-stack","",@progbits