#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 *, char *);
int /*<<< orphan*/ scanf(char *, char *, ...);
int main() {
  char username[9];
  char first_name[10], last_name[10];
  scanf("%s", username);
  printf("Your username is '%8s'\n", username);
  scanf("%50s %50s", first_name, last_name);
  printf("First name: %s\n", first_name);
  printf("Last name: %s\n", last_name);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
lea    -0xd(%rbp),%rsi
lea    0xec6(%rip),%rdi
mov    $0x0,%al
call   1040 <scanf@plt>
lea    -0xd(%rbp),%rsi
lea    0xeb7(%rip),%rdi
call   1030 <printf@plt>
lea    -0x17(%rbp),%rsi
lea    -0x21(%rbp),%rdx
lea    0xebb(%rip),%rdi
mov    $0x0,%al
call   1040 <scanf@plt>
lea    -0x17(%rbp),%rsi
lea    0xeb3(%rip),%rdi
call   1030 <printf@plt>
lea    -0x21(%rbp),%rsi
lea    0xeb3(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
sub    $0x28,%rsp
lea    0xed2(%rip),%rdi
lea    0xb(%rsp),%rbx
mov    %rbx,%rsi
xor    %eax,%eax
call   1040 <scanf@plt>
lea    0xebf(%rip),%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
lea    0xec8(%rip),%rdi
lea    0x1e(%rsp),%rbx
lea    0x14(%rsp),%r14
mov    %rbx,%rsi
mov    %r14,%rdx
xor    %eax,%eax
call   1040 <scanf@plt>
lea    0xeb4(%rip),%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
lea    0xeb5(%rip),%rdi
mov    %r14,%rsi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x28,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [3 x i8] c"%s\00"
@.str.1 = [24 x i8] c"Your username is '%8s'\0A\00"
@.str.2 = [10 x i8] c"%50s %50s\00"
@.str.3 = [16 x i8] c"First name: %s\0A\00"
@.str.4 = [15 x i8] c"Last name: %s\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [9 x i8]
%3 = alloca [10 x i8]
%4 = alloca [10 x i8]
store i32 0, i32* %1
%5 = getelementptr inbounds [9 x i8], [9 x i8]* %2, i64 0, i64 0
%6 = call i32 (i8*, i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8* %5)
%7 = getelementptr inbounds [9 x i8], [9 x i8]* %2, i64 0, i64 0
%8 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.1, i64 0, i64 0), i8* %7)
%9 = getelementptr inbounds [10 x i8], [10 x i8]* %3, i64 0, i64 0
%10 = getelementptr inbounds [10 x i8], [10 x i8]* %4, i64 0, i64 0
%11 = call i32 (i8*, i8*, ...) @scanf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.2, i64 0, i64 0), i8* %9, i8* %10)
%12 = getelementptr inbounds [10 x i8], [10 x i8]* %3, i64 0, i64 0
%13 = call i32 @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0), i8* %12)
%14 = getelementptr inbounds [10 x i8], [10 x i8]* %4, i64 0, i64 0
%15 = call i32 @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.4, i64 0, i64 0), i8* %14)
ret i32 0
}

LLVM IR (-O2):
@.str = [3 x i8] c"%s\00"
@.str.1 = [24 x i8] c"Your username is '%8s'\0A\00"
@.str.2 = [10 x i8] c"%50s %50s\00"
@.str.3 = [16 x i8] c"First name: %s\0A\00"
@.str.4 = [15 x i8] c"Last name: %s\0A\00"
define i32 @main() {
%1 = alloca [9 x i8]
%2 = alloca [10 x i8]
%3 = alloca [10 x i8]
%4 = getelementptr inbounds [9 x i8], [9 x i8]* %1, i64 0, i64 0
%5 = getelementptr inbounds [10 x i8], [10 x i8]* %2, i64 0, i64 0
%6 = getelementptr inbounds [10 x i8], [10 x i8]* %3, i64 0, i64 0
%7 = call i32 (i8*, i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8* %4)
%8 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.1, i64 0, i64 0), i8* %4)
%9 = call i32 (i8*, i8*, ...) @scanf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.2, i64 0, i64 0), i8* %5, i8* %6)
%10 = call i32 @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0), i8* %5)
%11 = call i32 @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.4, i64 0, i64 0), i8* %6)
ret i32 0
}