#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 help() {
  printf("Usage:\n");
  printf("stdin to stdout: echo 00 | hex2bin > 0.bin\n");
  printf("arg to stdout: hex2bin 00 > 0.bin\n");
  printf("stdin to file: echo 00 | hex2bin -stdin 0.bin\n");
  printf("arg to file: hex2bin 00 0.bin\n");
  printf("\n");
  printf("Input must contain only hex characters.\n");
  return -1;
}


x86 assembly (clang, -O0):
<help>:
push   %rbp
mov    %rsp,%rbp
lea    0xee5(%rip),%rdi
call   1030 <printf@plt>
lea    0xee1(%rip),%rdi
call   1030 <printf@plt>
lea    0xf01(%rip),%rdi
call   1030 <printf@plt>
lea    0xf18(%rip),%rdi
call   1030 <printf@plt>
lea    0xf3b(%rip),%rdi
call   1030 <printf@plt>
lea    0xf75(%rip),%rdi
call   1030 <printf@plt>
lea    0xf42(%rip),%rdi
call   1030 <printf@plt>
mov    $0xffffffff,%eax
pop    %rbp
ret

x86 assembly (clang, -O2):
<help>:
push   %rax
lea    0xed8(%rip),%rdi
call   1040 <puts@plt>
lea    0xed3(%rip),%rdi
call   1040 <puts@plt>
lea    0xef2(%rip),%rdi
call   1040 <puts@plt>
lea    0xf08(%rip),%rdi
call   1040 <puts@plt>
lea    0xf2a(%rip),%rdi
call   1040 <puts@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
lea    0xf32(%rip),%rdi
call   1040 <puts@plt>
mov    $0xffffffff,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [8 x i8] c"Usage:\0A\00"
@.str.1 = [44 x i8] c"stdin to stdout: echo 00 | hex2bin > 0.bin\0A\00"
@.str.2 = [35 x i8] c"arg to stdout: hex2bin 00 > 0.bin\0A\00"
@.str.3 = [47 x i8] c"stdin to file: echo 00 | hex2bin -stdin 0.bin\0A\00"
@.str.4 = [31 x i8] c"arg to file: hex2bin 00 0.bin\0A\00"
@.str.5 = [2 x i8] c"\0A\00"
@.str.6 = [41 x i8] c"Input must contain only hex characters.\0A\00"
define i32 @help() {
%1 = call i32 @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0))
%2 = call i32 @printf(i8* getelementptr inbounds ([44 x i8], [44 x i8]* @.str.1, i64 0, i64 0))
%3 = call i32 @printf(i8* getelementptr inbounds ([35 x i8], [35 x i8]* @.str.2, i64 0, i64 0))
%4 = call i32 @printf(i8* getelementptr inbounds ([47 x i8], [47 x i8]* @.str.3, i64 0, i64 0))
%5 = call i32 @printf(i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.4, i64 0, i64 0))
%6 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.5, i64 0, i64 0))
%7 = call i32 @printf(i8* getelementptr inbounds ([41 x i8], [41 x i8]* @.str.6, i64 0, i64 0))
ret i32 -1
}

LLVM IR (-O2):
@str = [7 x i8] c"Usage:\00"
@str.7 = [43 x i8] c"stdin to stdout: echo 00 | hex2bin > 0.bin\00"
@str.8 = [34 x i8] c"arg to stdout: hex2bin 00 > 0.bin\00"
@str.9 = [46 x i8] c"stdin to file: echo 00 | hex2bin -stdin 0.bin\00"
@str.10 = [30 x i8] c"arg to file: hex2bin 00 0.bin\00"
@str.11 = [40 x i8] c"Input must contain only hex characters.\00"
define i32 @help() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([7 x i8], [7 x i8]* @str, i64 0, i64 0))
%2 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([43 x i8], [43 x i8]* @str.7, i64 0, i64 0))
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([34 x i8], [34 x i8]* @str.8, i64 0, i64 0))
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([46 x i8], [46 x i8]* @str.9, i64 0, i64 0))
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([30 x i8], [30 x i8]* @str.10, i64 0, i64 0))
%6 = tail call i32 @putchar(i32 10)
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([40 x i8], [40 x i8]* @str.11, i64 0, i64 0))
ret i32 -1
}