#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*/ exit(int);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
int /*<<< orphan*/ printf(char *);
int /*<<< orphan*/ stderr;
void usage(char *err) {
  if (err)
    fprintf(stderr, "%s\n", err);
  printf("wifistats_iterate [options]\n");
  printf("\t-h --help \n"
         "\t-b --buffer    [buffer up the output locally]\n"
         "\t-c --count     [number of iterations]\n"
         "\t-I --interval  [fractional number of seconds]\n"
         "\t-i --interface [wifi interface]\n");
  exit(-1);
}


x86 assembly (clang, -O0):
<usage>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
cmpq   $0x0,-0x8(%rbp)
je     1160 <usage+0x30>
mov    0x2e92(%rip),%rax
mov    (%rax),%edi
mov    -0x8(%rbp),%rdx
lea    0xea5(%rip),%rsi
call   1040 <fprintf@plt>
lea    0xe9d(%rip),%rdi
call   1030 <printf@plt>
lea    0xeae(%rip),%rdi
call   1030 <printf@plt>
mov    $0xffffffff,%edi
call   1050 <exit@plt>

x86 assembly (clang, -O2):
<usage>:
push   %rax
test   %rdi,%rdi
je     114e <usage+0x1e>
mov    %rdi,%rdx
mov    0x2ea0(%rip),%rax
mov    (%rax),%edi
lea    0xeb7(%rip),%rsi
call   1040 <fprintf@plt>
lea    0xeaf(%rip),%rdi
call   1030 <puts@plt>
lea    0xebf(%rip),%rdi
call   1030 <puts@plt>
mov    $0xffffffff,%edi
call   1050 <exit@plt>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [4 x i8] c"%s\0A\00"
@.str.1 = [29 x i8] c"wifistats_iterate [options]\0A\00"
@.str.2 = [179 x i8] c"\09-h --help \0A\09-b --buffer [buffer up the output locally]\0A\09-c --count [number of iterations]\0A\09-I --interval [fractional number of seconds]\0A\09-i --interface [wifi interface]\0A\00"
define void @usage(i8* %0) {
%2 = alloca i8*
store i8* %0, i8** %2
%3 = load i8*, i8** %2
%4 = icmp ne i8* %3, null
br i1 %4, label %5, label %9
5: ; preds = %1
%6 = load i32, i32* @stderr
%7 = load i8*, i8** %2
%8 = call i32 @fprintf(i32 %6, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i8* %7)
br label %9
9: ; preds = %5, %1
%10 = call i32 @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.1, i64 0, i64 0))
%11 = call i32 @printf(i8* getelementptr inbounds ([179 x i8], [179 x i8]* @.str.2, i64 0, i64 0))
%12 = call i32 @exit(i32 -1)
unreachable
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [4 x i8] c"%s\0A\00"
@str = [28 x i8] c"wifistats_iterate [options]\00"
@str.3 = [178 x i8] c"\09-h --help \0A\09-b --buffer [buffer up the output locally]\0A\09-c --count [number of iterations]\0A\09-I --interval [fractional number of seconds]\0A\09-i --interface [wifi interface]\00"
define void @usage(i8* %0) {
%2 = icmp eq i8* %0, null
br i1 %2, label %6, label %3
3: ; preds = %1
%4 = load i32, i32* @stderr
%5 = tail call i32 @fprintf(i32 %4, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i8* %0)
br label %6
6: ; preds = %3, %1
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([28 x i8], [28 x i8]* @str, i64 0, i64 0))
%8 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([178 x i8], [178 x i8]* @str.3, i64 0, i64 0))
%9 = tail call i32 @exit(i32 -1)
unreachable
}