#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*/ printf(char *, char const *);
int /*<<< orphan*/ puts(char *);
void print_usage(const char *prog) {
  printf("Usage: %s [-DsbdlnHOLC3] [data,..]\n", prog);
  puts("  -D --device   device to use (default /dev/spidev0.0)\n"
       "  -s --speed    max speed (Hz)\n"
       "  -d --delay    delay (usec)\n"
       "  -b --bpw      bits per word \n"
       "  -n --len      length\n"
       "  -l --loop     loopback\n"
       "  -H --cpha     clock phase\n"
       "  -O --cpol     clock polarity\n"
       "  -L --lsb      least significant bit first\n"
       "  -C --cs-high  chip select active high\n"
       "  -3 --3wire    SI/SO signals shared\n"
       "  -q --quiet    Don't output data send/received\n"
       "  data is a series of octets to send, separated by comma, or b# to "
       "switch to another bits per word\n");
  exit(1);
}


x86 assembly (clang, -O0):
<print_usage>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rsi
lea    0xeb9(%rip),%rdi
call   1040 <printf@plt>
lea    0xed1(%rip),%rdi
call   1030 <puts@plt>
mov    $0x1,%edi
call   1050 <exit@plt>

x86 assembly (clang, -O2):
<print_usage>:
push   %rax
mov    %rdi,%rsi
lea    0xec5(%rip),%rdi
call   1040 <printf@plt>
lea    0xedd(%rip),%rdi
call   1030 <puts@plt>
mov    $0x1,%edi
call   1050 <exit@plt>

LLVM IR (-O0):
@.str = [36 x i8] c"Usage: %s [-DsbdlnHOLC3] [data,..]\0A\00"
@.str.1 = [522 x i8] c" -D --device device to use (default /dev/spidev0.0)\0A -s --speed max speed (Hz)\0A -d --delay delay (usec)\0A -b --bpw bits per word \0A -n --len length\0A -l --loop loopback\0A -H --cpha clock phase\0A -O --cpol clock polarity\0A -L --lsb least significant bit first\0A -C --cs-high chip select active high\0A -3 --3wire SI/SO signals shared\0A -q --quiet Don't output data send/received\0A data is a series of octets to send, separated by comma, or b# to switch to another bits per word\0A\00"
define void @print_usage(i8* %0) {
%2 = alloca i8*
store i8* %0, i8** %2
%3 = load i8*, i8** %2
%4 = call i32 @printf(i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str, i64 0, i64 0), i8* %3)
%5 = call i32 @puts(i8* getelementptr inbounds ([522 x i8], [522 x i8]* @.str.1, i64 0, i64 0))
%6 = call i32 @exit(i32 1)
unreachable
}

LLVM IR (-O2):
@.str = [36 x i8] c"Usage: %s [-DsbdlnHOLC3] [data,..]\0A\00"
@.str.1 = [522 x i8] c" -D --device device to use (default /dev/spidev0.0)\0A -s --speed max speed (Hz)\0A -d --delay delay (usec)\0A -b --bpw bits per word \0A -n --len length\0A -l --loop loopback\0A -H --cpha clock phase\0A -O --cpol clock polarity\0A -L --lsb least significant bit first\0A -C --cs-high chip select active high\0A -3 --3wire SI/SO signals shared\0A -q --quiet Don't output data send/received\0A data is a series of octets to send, separated by comma, or b# to switch to another bits per word\0A\00"
define void @print_usage(i8* %0) {
%2 = tail call i32 @printf(i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str, i64 0, i64 0), i8* %0)
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([522 x i8], [522 x i8]* @.str.1, i64 0, i64 0))
%4 = tail call i32 @exit(i32 1)
unreachable
}