#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(int argc, char **argv) {
  printf("Usage: %s [OPTIONS] [DOMAIN...]\n", argv[0]);
  printf("Intercept DNS traffic and update the routing table for any A or AAAA "
         "records\n");
  printf("that match the targeted DOMAINS.\n\n");
  printf("Options:\n");
  printf("\t-d, --dev IFNAME          Use IFNAME as the outgoing interface for "
         "matching records.\n");
  printf("\t-r, --route ADDR          Use ADDR as the IPv4 gateway for "
         "matching records.\n");
  printf("\t-s, --script FILE         Execute FILE on a DNS cache update for "
         "each matching record.\n");
  printf("\t-c, --cachefile FILE      Preserve the DNS cache in FILE.\n");
  printf("\t-g, --grace-period DELAY  Maintain the DNS cache entries and "
         "routes for matching records\n");
  printf("\t                          for DELAY seconds beyond the specified "
         "TTL.\n");
  printf("\t-h, --help                Display this message.\n");
}


x86 assembly (clang, -O0):
<usage>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %edi,-0x4(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x10(%rbp),%rax
mov    (%rax),%rsi
lea    0xed3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xee6(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf26(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf3b(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf37(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf80(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xfc1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0x100c(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0x103a(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0x1087(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0x10c1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<usage>:
push   %rax
mov    (%rsi),%rsi
lea    0xed5(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xee8(%rip),%rdi
call   1030 <puts@plt>
lea    0xf29(%rip),%rdi
call   1030 <puts@plt>
lea    0xf3f(%rip),%rdi
call   1030 <puts@plt>
lea    0xf3c(%rip),%rdi
call   1030 <puts@plt>
lea    0xf86(%rip),%rdi
call   1030 <puts@plt>
lea    0xfc8(%rip),%rdi
call   1030 <puts@plt>
lea    0x1014(%rip),%rdi
call   1030 <puts@plt>
lea    0x1043(%rip),%rdi
call   1030 <puts@plt>
lea    0x1091(%rip),%rdi
call   1030 <puts@plt>
lea    0x10cc(%rip),%rdi
pop    %rax
jmp    1030 <puts@plt>

LLVM IR (-O0):
@.str = [33 x i8] c"Usage: %s [OPTIONS] [DOMAIN...]\0A\00"
@.str.1 = [78 x i8] c"Intercept DNS traffic and update the routing table for any A or AAAA records\0A\00"
@.str.2 = [35 x i8] c"that match the targeted DOMAINS.\0A\0A\00"
@.str.3 = [10 x i8] c"Options:\0A\00"
@.str.4 = [87 x i8] c"\09-d, --dev IFNAME Use IFNAME as the outgoing interface for matching records.\0A\00"
@.str.5 = [79 x i8] c"\09-r, --route ADDR Use ADDR as the IPv4 gateway for matching records.\0A\00"
@.str.6 = [89 x i8] c"\09-s, --script FILE Execute FILE on a DNS cache update for each matching record.\0A\00"
@.str.7 = [60 x i8] c"\09-c, --cachefile FILE Preserve the DNS cache in FILE.\0A\00"
@.str.8 = [91 x i8] c"\09-g, --grace-period DELAY Maintain the DNS cache entries and routes for matching records\0A\00"
@.str.9 = [72 x i8] c"\09 for DELAY seconds beyond the specified TTL.\0A\00"
@.str.10 = [50 x i8] c"\09-h, --help Display this message.\0A\00"
define void @usage(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i8**
store i32 %0, i32* %3
store i8** %1, i8*** %4
%5 = load i8**, i8*** %4
%6 = getelementptr inbounds i8*, i8** %5, i64 0
%7 = load i8*, i8** %6
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([33 x i8], [33 x i8]* @.str, i64 0, i64 0), i8* %7)
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([78 x i8], [78 x i8]* @.str.1, i64 0, i64 0))
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([35 x i8], [35 x i8]* @.str.2, i64 0, i64 0))
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0))
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([87 x i8], [87 x i8]* @.str.4, i64 0, i64 0))
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([79 x i8], [79 x i8]* @.str.5, i64 0, i64 0))
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([89 x i8], [89 x i8]* @.str.6, i64 0, i64 0))
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @.str.7, i64 0, i64 0))
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([91 x i8], [91 x i8]* @.str.8, i64 0, i64 0))
%17 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([72 x i8], [72 x i8]* @.str.9, i64 0, i64 0))
%18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([50 x i8], [50 x i8]* @.str.10, i64 0, i64 0))
ret void
}

LLVM IR (-O2):
@.str = [33 x i8] c"Usage: %s [OPTIONS] [DOMAIN...]\0A\00"
@str = [77 x i8] c"Intercept DNS traffic and update the routing table for any A or AAAA records\00"
@str.11 = [34 x i8] c"that match the targeted DOMAINS.\0A\00"
@str.12 = [9 x i8] c"Options:\00"
@str.13 = [86 x i8] c"\09-d, --dev IFNAME Use IFNAME as the outgoing interface for matching records.\00"
@str.14 = [78 x i8] c"\09-r, --route ADDR Use ADDR as the IPv4 gateway for matching records.\00"
@str.15 = [88 x i8] c"\09-s, --script FILE Execute FILE on a DNS cache update for each matching record.\00"
@str.16 = [59 x i8] c"\09-c, --cachefile FILE Preserve the DNS cache in FILE.\00"
@str.17 = [90 x i8] c"\09-g, --grace-period DELAY Maintain the DNS cache entries and routes for matching records\00"
@str.18 = [71 x i8] c"\09 for DELAY seconds beyond the specified TTL.\00"
@str.19 = [49 x i8] c"\09-h, --help Display this message.\00"
define void @usage(i32 %0, i8** nocapture %1) {
%3 = load i8*, i8** %1
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([33 x i8], [33 x i8]* @.str, i64 0, i64 0), i8* %3)
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([77 x i8], [77 x i8]* @str, i64 0, i64 0))
%6 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([34 x i8], [34 x i8]* @str.11, i64 0, i64 0))
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @str.12, i64 0, i64 0))
%8 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([86 x i8], [86 x i8]* @str.13, i64 0, i64 0))
%9 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([78 x i8], [78 x i8]* @str.14, i64 0, i64 0))
%10 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([88 x i8], [88 x i8]* @str.15, i64 0, i64 0))
%11 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([59 x i8], [59 x i8]* @str.16, i64 0, i64 0))
%12 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([90 x i8], [90 x i8]* @str.17, i64 0, i64 0))
%13 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([71 x i8], [71 x i8]* @str.18, i64 0, i64 0))
%14 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([49 x i8], [49 x i8]* @str.19, i64 0, i64 0))
ret void
}