#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 *, char *);
char *strlen(char *);
int main(void) {
  char name[40];
  printf("What's your first name?\n");
  scanf("%s", name);
  printf("Fist name enclosed in double quotation marks:\n");
  printf("\"%s\"\n", name);
  printf("First name with 20 characters wide and at the right end of the filed "
         "in quotes:\n");
  printf("\"%20s\"\n", name);
  printf("First name at the left end of a field 20 characters wide with "
         "enclosed in quotes:\n");
  printf("\"%-20s\"\n", name);
  printf("First name in a filed three characters wider than it:\n");
  printf("\"%*s\"\n", strlen(name) + 3, name);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    -0x30(%rbp),%rsi
lea    0xec1(%rip),%rdi
call   1050 <scanf@plt>
lea    0xeb8(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    -0x30(%rbp),%rsi
lea    0xed5(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xecd(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    -0x30(%rbp),%rsi
lea    0xf0c(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xf06(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    -0x30(%rbp),%rsi
lea    0xf47(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xf42(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    -0x30(%rbp),%rdi
call   1030 <strlen@plt>
mov    %rax,%rsi
add    $0x3,%rsi
lea    -0x30(%rbp),%rdx
lea    0xf57(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x30,%rsp
lea    0xed5(%rip),%rdi
call   1030 <puts@plt>
lea    0xea8(%rip),%rdi
mov    %rsp,%rbx
mov    %rbx,%rsi
call   1060 <scanf@plt>
lea    0xecf(%rip),%rdi
call   1030 <puts@plt>
lea    0xe8d(%rip),%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xee0(%rip),%rdi
call   1030 <puts@plt>
lea    0xe76(%rip),%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xf13(%rip),%rdi
call   1030 <puts@plt>
lea    0xe61(%rip),%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xf48(%rip),%rdi
call   1030 <puts@plt>
mov    %rbx,%rdi
call   1040 <strlen@plt>
lea    0x3(%rax),%rsi
lea    0xe41(%rip),%rdi
mov    %rbx,%rdx
xor    %eax,%eax
call   1050 <printf@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [25 x i8] c"What's your first name?\0A\00"
@.str.1 = [3 x i8] c"%s\00"
@.str.2 = [47 x i8] c"Fist name enclosed in double quotation marks:\0A\00"
@.str.3 = [6 x i8] c"\22%s\22\0A\00"
@.str.4 = [81 x i8] c"First name with 20 characters wide and at the right end of the filed in quotes:\0A\00"
@.str.5 = [8 x i8] c"\22%20s\22\0A\00"
@.str.6 = [83 x i8] c"First name at the left end of a field 20 characters wide with enclosed in quotes:\0A\00"
@.str.7 = [9 x i8] c"\22%-20s\22\0A\00"
@.str.8 = [55 x i8] c"First name in a filed three characters wider than it:\0A\00"
@.str.9 = [7 x i8] c"\22%*s\22\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [40 x i8]
store i32 0, i32* %1
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0))
%4 = getelementptr inbounds [40 x i8], [40 x i8]* %2, i64 0, i64 0
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8* %4)
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([47 x i8], [47 x i8]* @.str.2, i64 0, i64 0))
%7 = getelementptr inbounds [40 x i8], [40 x i8]* %2, i64 0, i64 0
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.3, i64 0, i64 0), i8* %7)
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([81 x i8], [81 x i8]* @.str.4, i64 0, i64 0))
%10 = getelementptr inbounds [40 x i8], [40 x i8]* %2, i64 0, i64 0
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.5, i64 0, i64 0), i8* %10)
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([83 x i8], [83 x i8]* @.str.6, i64 0, i64 0))
%13 = getelementptr inbounds [40 x i8], [40 x i8]* %2, i64 0, i64 0
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.7, i64 0, i64 0), i8* %13)
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([55 x i8], [55 x i8]* @.str.8, i64 0, i64 0))
%16 = getelementptr inbounds [40 x i8], [40 x i8]* %2, i64 0, i64 0
%17 = call i8* @strlen(i8* %16)
%18 = getelementptr inbounds i8, i8* %17, i64 3
%19 = getelementptr inbounds [40 x i8], [40 x i8]* %2, i64 0, i64 0
%20 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.9, i64 0, i64 0), i8* %18, i8* %19)
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [3 x i8] c"%s\00"
@.str.3 = [6 x i8] c"\22%s\22\0A\00"
@.str.5 = [8 x i8] c"\22%20s\22\0A\00"
@.str.7 = [9 x i8] c"\22%-20s\22\0A\00"
@.str.9 = [7 x i8] c"\22%*s\22\0A\00"
@str = [24 x i8] c"What's your first name?\00"
@str.10 = [46 x i8] c"Fist name enclosed in double quotation marks:\00"
@str.11 = [80 x i8] c"First name with 20 characters wide and at the right end of the filed in quotes:\00"
@str.12 = [82 x i8] c"First name at the left end of a field 20 characters wide with enclosed in quotes:\00"
@str.13 = [54 x i8] c"First name in a filed three characters wider than it:\00"
define i32 @main() {
%1 = alloca [40 x i8]
%2 = getelementptr inbounds [40 x i8], [40 x i8]* %1, i64 0, i64 0
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([24 x i8], [24 x i8]* @str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8* %2)
%5 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([46 x i8], [46 x i8]* @str.10, i64 0, i64 0))
%6 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.3, i64 0, i64 0), i8* %2)
%7 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([80 x i8], [80 x i8]* @str.11, i64 0, i64 0))
%8 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([8 x i8], [8 x i8]* @.str.5, i64 0, i64 0), i8* %2)
%9 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([82 x i8], [82 x i8]* @str.12, i64 0, i64 0))
%10 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str.7, i64 0, i64 0), i8* %2)
%11 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([54 x i8], [54 x i8]* @str.13, i64 0, i64 0))
%12 = call i8* @strlen(i8* %2)
%13 = getelementptr inbounds i8, i8* %12, i64 3
%14 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([7 x i8], [7 x i8]* @.str.9, i64 0, i64 0), i8* %13, i8* %2)
ret i32 0
}