#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(void) {
  extern char *program_invocation_short_name;
  printf("USAGE:\n");
  printf("   %s INPUT_DEVICE\n", program_invocation_short_name);
  printf("for example,\n");
  printf("   %s "
         "'/dev/input/by-path/"
         "platform-1c1b000.ehci1-controller-usb-0:1.4:1.0-event-kbd'\n",
         program_invocation_short_name);
  printf("\n");
}


x86 assembly (clang, -O0):
<usage>:
push   %rbp
mov    %rsp,%rbp
lea    0xee5(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    0x2ec7(%rip),%rax
mov    (%rax),%rsi
lea    0xed5(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xedb(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    0x2ea1(%rip),%rax
mov    (%rax),%rsi
lea    0xed1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf17(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
pop    %rbp
ret

x86 assembly (clang, -O2):
<usage>:
push   %rbx
lea    0xf32(%rip),%rdi
call   1040 <puts@plt>
mov    0x2eac(%rip),%rbx
mov    (%rbx),%rsi
lea    0xeb2(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xf15(%rip),%rdi
call   1040 <puts@plt>
mov    (%rbx),%rsi
lea    0xea9(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    $0xa,%edi
pop    %rbx
jmp    1030 <putchar@plt>

LLVM IR (-O0):
@.str = [8 x i8] c"USAGE:\0A\00"
@.str.1 = [20 x i8] c" %s INPUT_DEVICE\0A\00"
@program_invocation_short_name = external global i8*
@.str.2 = [14 x i8] c"for example,\0A\00"
@.str.3 = [86 x i8] c" %s '/dev/input/by-path/platform-1c1b000.ehci1-controller-usb-0:1.4:1.0-event-kbd'\0A\00"
@.str.4 = [2 x i8] c"\0A\00"
define void @usage() {
%1 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0))
%2 = load i8*, i8** @program_invocation_short_name
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i8* %2)
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0))
%5 = load i8*, i8** @program_invocation_short_name
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([86 x i8], [86 x i8]* @.str.3, i64 0, i64 0), i8* %5)
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.4, i64 0, i64 0))
ret void
}

LLVM IR (-O2):
@.str.1 = [20 x i8] c" %s INPUT_DEVICE\0A\00"
@program_invocation_short_name = external global i8*
@.str.3 = [86 x i8] c" %s '/dev/input/by-path/platform-1c1b000.ehci1-controller-usb-0:1.4:1.0-event-kbd'\0A\00"
@str = [7 x i8] c"USAGE:\00"
@str.5 = [13 x i8] c"for example,\00"
define void @usage() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([7 x i8], [7 x i8]* @str, i64 0, i64 0))
%2 = load i8*, i8** @program_invocation_short_name
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i8* %2)
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @str.5, i64 0, i64 0))
%5 = load i8*, i8** @program_invocation_short_name
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([86 x i8], [86 x i8]* @.str.3, i64 0, i64 0), i8* %5)
%7 = tail call i32 @putchar(i32 10)
ret void
}