#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 show_usage(char *argv[]) {
  printf("%s <-d device> <-a address> [-o offset] [-r length] [-w data] [-h]\n",
         argv[0]);
  printf("\t-d device: i2c device file, like /dev/i2c-1 by default\n");
  printf("\t-a address: i2c slave device base address, like 0x50 by default\n");
  printf("\t-o offset: offset from base address, like 0x00, 0x10 ...\n");
  printf("\t-r length: read length bytes from at24c256 eeprom\n");
  printf("\t-w data: write to at24c256 eeprom\n");
  printf("\t-h: show help message\n\n");
}


x86 assembly (clang, -O0):
<show_usage>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rax
mov    (%rax),%rsi
lea    0xed6(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf0c(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf37(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf6b(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf98(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xfbe(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xfd4(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<show_usage>:
push   %rax
mov    (%rdi),%rsi
lea    0xed5(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xf0b(%rip),%rdi
call   1030 <puts@plt>
lea    0xf37(%rip),%rdi
call   1030 <puts@plt>
lea    0xf6c(%rip),%rdi
call   1030 <puts@plt>
lea    0xf9a(%rip),%rdi
call   1030 <puts@plt>
lea    0xfc1(%rip),%rdi
call   1030 <puts@plt>
lea    0xfd8(%rip),%rdi
pop    %rax
jmp    1030 <puts@plt>

LLVM IR (-O0):
@.str = [68 x i8] c"%s <-d device> <-a address> [-o offset] [-r length] [-w data] [-h]\0A\00"
@.str.1 = [57 x i8] c"\09-d device: i2c device file, like /dev/i2c-1 by default\0A\00"
@.str.2 = [66 x i8] c"\09-a address: i2c slave device base address, like 0x50 by default\0A\00"
@.str.3 = [59 x i8] c"\09-o offset: offset from base address, like 0x00, 0x10 ...\0A\00"
@.str.4 = [52 x i8] c"\09-r length: read length bytes from at24c256 eeprom\0A\00"
@.str.5 = [36 x i8] c"\09-w data: write to at24c256 eeprom\0A\00"
@.str.6 = [25 x i8] c"\09-h: show help message\0A\0A\00"
define void @show_usage(i8** %0) {
%2 = alloca i8**
store i8** %0, i8*** %2
%3 = load i8**, i8*** %2
%4 = getelementptr inbounds i8*, i8** %3, i64 0
%5 = load i8*, i8** %4
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([68 x i8], [68 x i8]* @.str, i64 0, i64 0), i8* %5)
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([57 x i8], [57 x i8]* @.str.1, i64 0, i64 0))
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([66 x i8], [66 x i8]* @.str.2, i64 0, i64 0))
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([59 x i8], [59 x i8]* @.str.3, i64 0, i64 0))
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([52 x i8], [52 x i8]* @.str.4, i64 0, i64 0))
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str.5, i64 0, i64 0))
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.6, i64 0, i64 0))
ret void
}

LLVM IR (-O2):
@.str = [68 x i8] c"%s <-d device> <-a address> [-o offset] [-r length] [-w data] [-h]\0A\00"
@str = [56 x i8] c"\09-d device: i2c device file, like /dev/i2c-1 by default\00"
@str.7 = [65 x i8] c"\09-a address: i2c slave device base address, like 0x50 by default\00"
@str.8 = [58 x i8] c"\09-o offset: offset from base address, like 0x00, 0x10 ...\00"
@str.9 = [51 x i8] c"\09-r length: read length bytes from at24c256 eeprom\00"
@str.10 = [35 x i8] c"\09-w data: write to at24c256 eeprom\00"
@str.11 = [24 x i8] c"\09-h: show help message\0A\00"
define void @show_usage(i8** nocapture %0) {
%2 = load i8*, i8** %0
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([68 x i8], [68 x i8]* @.str, i64 0, i64 0), i8* %2)
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([56 x i8], [56 x i8]* @str, i64 0, i64 0))
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([65 x i8], [65 x i8]* @str.7, i64 0, i64 0))
%6 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([58 x i8], [58 x i8]* @str.8, i64 0, i64 0))
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([51 x i8], [51 x i8]* @str.9, i64 0, i64 0))
%8 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([35 x i8], [35 x i8]* @str.10, i64 0, i64 0))
%9 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([24 x i8], [24 x i8]* @str.11, i64 0, i64 0))
ret void
}