#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 /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ puts(char *);
int /*<<< orphan*/ scanf(char *, int *);
int main(void) {
  int x = 0, y = 0;
  int sub = 0;
  puts("请输入两个整数");
  printf("整数1: ");
  scanf("%d", &x);
  printf("整数2: ");
  scanf("%d", &y);
  if (x > y) {
    sub = x - y;
  } else {
    sub = y - x;
  }
  printf("它们的差是: %d\n", sub);
  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
call   1030 <puts@plt>
lea    0xeaf(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xeab(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1050 <scanf@plt>
lea    0xe9e(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xe8d(%rip),%rdi
lea    -0xc(%rbp),%rsi
call   1050 <scanf@plt>
mov    -0x8(%rbp),%eax
cmp    -0xc(%rbp),%eax
jle    11b6 <main+0x86>
mov    -0x8(%rbp),%eax
sub    -0xc(%rbp),%eax
mov    %eax,-0x10(%rbp)
jmp    11bf <main+0x8f>
mov    -0xc(%rbp),%eax
sub    -0x8(%rbp),%eax
mov    %eax,-0x10(%rbp)
mov    -0x10(%rbp),%esi
lea    0xe64(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
movl   $0x0,0xc(%rsp)
movl   $0x0,0x8(%rsp)
lea    0xeb4(%rip),%rdi
call   1030 <puts@plt>
lea    0xebe(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xeba(%rip),%rbx
lea    0xc(%rsp),%rsi
mov    %rbx,%rdi
call   1050 <scanf@plt>
lea    0xea9(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0x8(%rsp),%rsi
mov    %rbx,%rdi
call   1050 <scanf@plt>
mov    0xc(%rsp),%esi
mov    0x8(%rsp),%eax
mov    %esi,%ecx
sub    %eax,%ecx
neg    %ecx
sub    %eax,%esi
cmovle %ecx,%esi
lea    0xe85(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [22 x i8] c"\E8\AF\B7\E8\BE\93\E5\85\A5\E4\B8\A4\E4\B8\AA\E6\95\B4\E6\95\B0\00"
@.str.1 = [10 x i8] c"\E6\95\B4\E6\95\B01: \00"
@.str.2 = [3 x i8] c"%d\00"
@.str.3 = [10 x i8] c"\E6\95\B4\E6\95\B02: \00"
@.str.4 = [21 x i8] c"\E5\AE\83\E4\BB\AC\E7\9A\84\E5\B7\AE\E6\98\AF: %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 @puts(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0))
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %2)
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0))
%9 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %3)
%10 = load i32, i32* %2
%11 = load i32, i32* %3
%12 = icmp sgt i32 %10, %11
br i1 %12, label %13, label %17
13: ; preds = %0
%14 = load i32, i32* %2
%15 = load i32, i32* %3
%16 = sub nsw i32 %14, %15
store i32 %16, i32* %4
br label %21
17: ; preds = %0
%18 = load i32, i32* %3
%19 = load i32, i32* %2
%20 = sub nsw i32 %18, %19
store i32 %20, i32* %4
br label %21
21: ; preds = %17, %13
%22 = load i32, i32* %4
%23 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.4, i64 0, i64 0), i32 %22)
ret i32 0
}

LLVM IR (-O2):
@.str = [22 x i8] c"\E8\AF\B7\E8\BE\93\E5\85\A5\E4\B8\A4\E4\B8\AA\E6\95\B4\E6\95\B0\00"
@.str.1 = [10 x i8] c"\E6\95\B4\E6\95\B01: \00"
@.str.2 = [3 x i8] c"%d\00"
@.str.3 = [10 x i8] c"\E6\95\B4\E6\95\B02: \00"
@.str.4 = [21 x i8] c"\E5\AE\83\E4\BB\AC\E7\9A\84\E5\B7\AE\E6\98\AF: %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 @puts(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0))
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %1)
%8 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0))
%9 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %2)
%10 = load i32, i32* %1
%11 = load i32, i32* %2
%12 = icmp sgt i32 %10, %11
%13 = sub nsw i32 %10, %11
%14 = sub nsw i32 %11, %10
%15 = select i1 %12, i32 %13, i32 %14
%16 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @.str.4, i64 0, i64 0), i32 %15)
ret i32 0
}