#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 *, ...);
void usage(const char *cmd) {
  printf("Start a XDP prog which send ICMP \"packet too big\" \n"
         "messages if ingress packet is bigger then MAX_SIZE bytes\n");
  printf("Usage: %s [...]\n", cmd);
  printf("    -i <ifindex> Interface Index\n");
  printf("    -T <stop-after-X-seconds> Default: 0 (forever)\n");
  printf("    -S use skb-mode\n");
  printf("    -N enforce native mode\n");
  printf("    -F force loading prog\n");
  printf("    -h Display this help\n");
}


x86 assembly (clang, -O0):
<usage>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
lea    0xedd(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%rsi
lea    0xf38(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf3b(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf4f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf75(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf7c(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf8a(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf97(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<usage>:
push   %rbx
mov    %rdi,%rbx
lea    0xee6(%rip),%rdi
call   1030 <puts@plt>
lea    0xec9(%rip),%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xf35(%rip),%rdi
call   1030 <puts@plt>
lea    0xf4a(%rip),%rdi
call   1030 <puts@plt>
lea    0xf71(%rip),%rdi
call   1030 <puts@plt>
lea    0xf79(%rip),%rdi
call   1030 <puts@plt>
lea    0xf88(%rip),%rdi
call   1030 <puts@plt>
lea    0xf96(%rip),%rdi
pop    %rbx
jmp    1030 <puts@plt>

LLVM IR (-O0):
@.str = [109 x i8] c"Start a XDP prog which send ICMP \22packet too big\22 \0Amessages if ingress packet is bigger then MAX_SIZE bytes\0A\00"
@.str.1 = [17 x i8] c"Usage: %s [...]\0A\00"
@.str.2 = [34 x i8] c" -i <ifindex> Interface Index\0A\00"
@.str.3 = [52 x i8] c" -T <stop-after-X-seconds> Default: 0 (forever)\0A\00"
@.str.4 = [21 x i8] c" -S use skb-mode\0A\00"
@.str.5 = [28 x i8] c" -N enforce native mode\0A\00"
@.str.6 = [27 x i8] c" -F force loading prog\0A\00"
@.str.7 = [26 x i8] c" -h Display this help\0A\00"
define void @usage(i8* %0) {
%2 = alloca i8*
store i8* %0, i8** %2
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([109 x i8], [109 x i8]* @.str, i64 0, i64 0))
%4 = load i8*, i8** %2
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0), i8* %4)
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([34 x i8], [34 x i8]* @.str.2, i64 0, i64 0))
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([52 x i8], [52 x i8]* @.str.3, i64 0, i64 0))
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.4, i64 0, i64 0))
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.5, i64 0, i64 0))
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.6, i64 0, i64 0))
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.7, i64 0, i64 0))
ret void
}

LLVM IR (-O2):
@.str.1 = [17 x i8] c"Usage: %s [...]\0A\00"
@str = [108 x i8] c"Start a XDP prog which send ICMP \22packet too big\22 \0Amessages if ingress packet is bigger then MAX_SIZE bytes\00"
@str.8 = [33 x i8] c" -i <ifindex> Interface Index\00"
@str.9 = [51 x i8] c" -T <stop-after-X-seconds> Default: 0 (forever)\00"
@str.10 = [20 x i8] c" -S use skb-mode\00"
@str.11 = [27 x i8] c" -N enforce native mode\00"
@str.12 = [26 x i8] c" -F force loading prog\00"
@str.13 = [25 x i8] c" -h Display this help\00"
define void @usage(i8* %0) {
%2 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([108 x i8], [108 x i8]* @str, i64 0, i64 0))
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0), i8* %0)
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([33 x i8], [33 x i8]* @str.8, i64 0, i64 0))
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([51 x i8], [51 x i8]* @str.9, i64 0, i64 0))
%6 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @str.10, i64 0, i64 0))
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([27 x i8], [27 x i8]* @str.11, i64 0, i64 0))
%8 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @str.12, i64 0, i64 0))
%9 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @str.13, i64 0, i64 0))
ret void
}