#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*/ scanf(char *, int *, int *);
int /*<<< orphan*/ sweap_by_address(int *, int *);
int /*<<< orphan*/ sweap_by_value(int, int);
int main() {
  int a, b;
  int *ptr1, *ptr2;
  ptr1 = &a;
  ptr2 = &b;
  printf("Please input two numbers:");
  scanf("%d%d", &a, &b);
  printf("Before invoke sweap_by_value\n");
  printf("a = %d, b = %d\n", a, b);
  sweap_by_value(a, b);
  printf("After invoke sweap_by_value\n");
  printf("a = %d, b = %d\n", a, b);
  printf("Before invoke sweap_by_address\n");
  printf("a = %d, b = %d\n", a, b);
  sweap_by_address(&a, &b);
  printf("After invoke sweap_by_address\n");
  printf("a = %d, b = %d\n", a, b);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    -0x8(%rbp),%rax
mov    %rax,-0x18(%rbp)
lea    -0xc(%rbp),%rax
mov    %rax,-0x20(%rbp)
lea    0xe9a(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xea6(%rip),%rdi
lea    -0x8(%rbp),%rsi
lea    -0xc(%rbp),%rdx
call   1060 <scanf@plt>
lea    0xe97(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
lea    0xea1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%edi
mov    -0xc(%rbp),%esi
call   1050 <sweap_by_value@plt>
lea    0xe98(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
lea    0xe74(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe93(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
lea    0xe52(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0x8(%rbp),%rdi
lea    -0xc(%rbp),%rsi
call   1040 <sweap_by_address@plt>
lea    0xe84(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
lea    0xe23(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
lea    0xea0(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xeac(%rip),%rdi
lea    0xc(%rsp),%r15
lea    0x8(%rsp),%r14
mov    %r15,%rsi
mov    %r14,%rdx
call   1070 <scanf@plt>
lea    0xea5(%rip),%rdi
call   1030 <puts@plt>
mov    0xc(%rsp),%esi
mov    0x8(%rsp),%edx
lea    0xe81(%rip),%rbx
mov    %rbx,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0xc(%rsp),%edi
mov    0x8(%rsp),%esi
call   1060 <sweap_by_value@plt>
lea    0xe90(%rip),%rdi
call   1030 <puts@plt>
mov    0xc(%rsp),%esi
mov    0x8(%rsp),%edx
mov    %rbx,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xe8e(%rip),%rdi
call   1030 <puts@plt>
mov    0xc(%rsp),%esi
mov    0x8(%rsp),%edx
mov    %rbx,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %r15,%rdi
mov    %r14,%rsi
call   1050 <sweap_by_address@plt>
lea    0xe84(%rip),%rdi
call   1030 <puts@plt>
mov    0xc(%rsp),%esi
mov    0x8(%rsp),%edx
mov    %rbx,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [26 x i8] c"Please input two numbers:\00"
@.str.1 = [5 x i8] c"%d%d\00"
@.str.2 = [30 x i8] c"Before invoke sweap_by_value\0A\00"
@.str.3 = [16 x i8] c"a = %d, b = %d\0A\00"
@.str.4 = [29 x i8] c"After invoke sweap_by_value\0A\00"
@.str.5 = [32 x i8] c"Before invoke sweap_by_address\0A\00"
@.str.6 = [31 x i8] c"After invoke sweap_by_address\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32*
%5 = alloca i32*
store i32 0, i32* %1
store i32* %2, i32** %4
store i32* %3, i32** %5
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32* %2, i32* %3)
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.2, i64 0, i64 0))
%9 = load i32, i32* %2
%10 = load i32, i32* %3
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0), i32 %9, i32 %10)
%12 = load i32, i32* %2
%13 = load i32, i32* %3
%14 = call i32 @sweap_by_value(i32 %12, i32 %13)
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.4, i64 0, i64 0))
%16 = load i32, i32* %2
%17 = load i32, i32* %3
%18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0), i32 %16, i32 %17)
%19 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str.5, i64 0, i64 0))
%20 = load i32, i32* %2
%21 = load i32, i32* %3
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0), i32 %20, i32 %21)
%23 = call i32 @sweap_by_address(i32* %2, i32* %3)
%24 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.6, i64 0, i64 0))
%25 = load i32, i32* %2
%26 = load i32, i32* %3
%27 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0), i32 %25, i32 %26)
ret i32 0
}

LLVM IR (-O2):
@.str = [26 x i8] c"Please input two numbers:\00"
@.str.1 = [5 x i8] c"%d%d\00"
@.str.3 = [16 x i8] c"a = %d, b = %d\0A\00"
@str = [29 x i8] c"Before invoke sweap_by_value\00"
@str.7 = [28 x i8] c"After invoke sweap_by_value\00"
@str.8 = [31 x i8] c"Before invoke sweap_by_address\00"
@str.9 = [30 x i8] c"After invoke sweap_by_address\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = bitcast i32* %1 to i8*
%4 = bitcast i32* %2 to i8*
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32* %1, i32* %2)
%7 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([29 x i8], [29 x i8]* @str, i64 0, i64 0))
%8 = load i32, i32* %1
%9 = load i32, i32* %2
%10 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0), i32 %8, i32 %9)
%11 = load i32, i32* %1
%12 = load i32, i32* %2
%13 = call i32 @sweap_by_value(i32 %11, i32 %12)
%14 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([28 x i8], [28 x i8]* @str.7, i64 0, i64 0))
%15 = load i32, i32* %1
%16 = load i32, i32* %2
%17 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0), i32 %15, i32 %16)
%18 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([31 x i8], [31 x i8]* @str.8, i64 0, i64 0))
%19 = load i32, i32* %1
%20 = load i32, i32* %2
%21 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0), i32 %19, i32 %20)
%22 = call i32 @sweap_by_address(i32* %1, i32* %2)
%23 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([30 x i8], [30 x i8]* @str.9, i64 0, i64 0))
%24 = load i32, i32* %1
%25 = load i32, i32* %2
%26 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0), i32 %24, i32 %25)
ret i32 0
}