#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
int gcd_func(int, int);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *, int *);
int main(void) {
  int first_num = 0, second_num = 0, result_num = 0;
  printf("輸入欲計算最大公因數的兩個數字(空格分開):");
  scanf("%d %d", &first_num, &second_num);
  result_num = gcd_func(first_num, second_num);
  printf("%d 及 %d 的最大公因數為 %d\n", first_num, second_num, result_num);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x8(%rbp)
movl   $0x0,-0xc(%rbp)
movl   $0x0,-0x10(%rbp)
lea    0xea5(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed4(%rip),%rdi
lea    -0x8(%rbp),%rsi
lea    -0xc(%rbp),%rdx
call   1040 <scanf@plt>
mov    -0x8(%rbp),%edi
mov    -0xc(%rbp),%esi
call   1050 <gcd_func@plt>
mov    %eax,-0x10(%rbp)
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
mov    -0x10(%rbp),%ecx
lea    0xeaf(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
movl   $0x0,0x4(%rsp)
movl   $0x0,(%rsp)
lea    0xeb9(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xee8(%rip),%rdi
lea    0x4(%rsp),%rsi
mov    %rsp,%rdx
call   1040 <scanf@plt>
mov    0x4(%rsp),%edi
mov    (%rsp),%esi
call   1050 <gcd_func@plt>
mov    0x4(%rsp),%esi
mov    (%rsp),%edx
lea    0xec7(%rip),%rdi
mov    %eax,%ecx
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [61 x i8] c"\E8\BC\B8\E5\85\A5\E6\AC\B2\E8\A8\88\E7\AE\97\E6\9C\80\E5\A4\A7\E5\85\AC\E5\9B\A0\E6\95\B8\E7\9A\84\E5\85\A9\E5\80\8B\E6\95\B8\E5\AD\97(\E7\A9\BA\E6\A0\BC\E5\88\86\E9\96\8B):\00"
@.str.1 = [6 x i8] c"%d %d\00"
@.str.2 = [36 x i8] c"%d \E5\8F\8A %d \E7\9A\84\E6\9C\80\E5\A4\A7\E5\85\AC\E5\9B\A0\E6\95\B8\E7\82\BA %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %2
store i32 0, i32* %3
store i32 0, i32* %4
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([61 x i8], [61 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32* %2, i32* %3)
%7 = load i32, i32* %2
%8 = load i32, i32* %3
%9 = call i32 @gcd_func(i32 %7, i32 %8)
store i32 %9, i32* %4
%10 = load i32, i32* %2
%11 = load i32, i32* %3
%12 = load i32, i32* %4
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str.2, i64 0, i64 0), i32 %10, i32 %11, i32 %12)
ret i32 0
}

LLVM IR (-O2):
@.str = [61 x i8] c"\E8\BC\B8\E5\85\A5\E6\AC\B2\E8\A8\88\E7\AE\97\E6\9C\80\E5\A4\A7\E5\85\AC\E5\9B\A0\E6\95\B8\E7\9A\84\E5\85\A9\E5\80\8B\E6\95\B8\E5\AD\97(\E7\A9\BA\E6\A0\BC\E5\88\86\E9\96\8B):\00"
@.str.1 = [6 x i8] c"%d %d\00"
@.str.2 = [36 x i8] c"%d \E5\8F\8A %d \E7\9A\84\E6\9C\80\E5\A4\A7\E5\85\AC\E5\9B\A0\E6\95\B8\E7\82\BA %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = bitcast i32* %1 to i8*
store i32 0, i32* %1
%4 = bitcast i32* %2 to i8*
store i32 0, i32* %2
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([61 x i8], [61 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32* %1, i32* %2)
%7 = load i32, i32* %1
%8 = load i32, i32* %2
%9 = call i32 @gcd_func(i32 %7, i32 %8)
%10 = load i32, i32* %1
%11 = load i32, i32* %2
%12 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([36 x i8], [36 x i8]* @.str.2, i64 0, i64 0), i32 %10, i32 %11, i32 %9)
ret i32 0
}