#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 *);
void usage(void) {
  printf("Usage: shell [-hvp]\n");
  printf("   -h  print this message\n");
  printf("   -v  print additional diagnostic information\n");
  printf("   -p  do not emit a command prompt\n");
  printf("   -l  emit logging statements to console\n");
  exit(1);
}


x86 assembly (clang, -O0):
<usage>:
push   %rbp
mov    %rsp,%rbp
lea    0xed5(%rip),%rdi
call   1030 <printf@plt>
lea    0xede(%rip),%rdi
call   1030 <printf@plt>
lea    0xeed(%rip),%rdi
call   1030 <printf@plt>
lea    0xf11(%rip),%rdi
call   1030 <printf@plt>
lea    0xf2a(%rip),%rdi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1040 <exit@plt>

x86 assembly (clang, -O2):
<usage>:
push   %rax
lea    0xed8(%rip),%rdi
call   1030 <puts@plt>
lea    0xee0(%rip),%rdi
call   1030 <puts@plt>
lea    0xeee(%rip),%rdi
call   1030 <puts@plt>
lea    0xf11(%rip),%rdi
call   1030 <puts@plt>
lea    0xf29(%rip),%rdi
call   1030 <puts@plt>
mov    $0x1,%edi
call   1040 <exit@plt>

LLVM IR (-O0):
@.str = [21 x i8] c"Usage: shell [-hvp]\0A\00"
@.str.1 = [27 x i8] c" -h print this message\0A\00"
@.str.2 = [48 x i8] c" -v print additional diagnostic information\0A\00"
@.str.3 = [37 x i8] c" -p do not emit a command prompt\0A\00"
@.str.4 = [43 x i8] c" -l emit logging statements to console\0A\00"
define void @usage() {
%1 = call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0))
%2 = call i32 @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.1, i64 0, i64 0))
%3 = call i32 @printf(i8* getelementptr inbounds ([48 x i8], [48 x i8]* @.str.2, i64 0, i64 0))
%4 = call i32 @printf(i8* getelementptr inbounds ([37 x i8], [37 x i8]* @.str.3, i64 0, i64 0))
%5 = call i32 @printf(i8* getelementptr inbounds ([43 x i8], [43 x i8]* @.str.4, i64 0, i64 0))
%6 = call i32 @exit(i32 1)
unreachable
}

LLVM IR (-O2):
@str = [20 x i8] c"Usage: shell [-hvp]\00"
@str.5 = [26 x i8] c" -h print this message\00"
@str.6 = [47 x i8] c" -v print additional diagnostic information\00"
@str.7 = [36 x i8] c" -p do not emit a command prompt\00"
@str.8 = [42 x i8] c" -l emit logging statements to console\00"
define void @usage() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @str, i64 0, i64 0))
%2 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @str.5, i64 0, i64 0))
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([47 x i8], [47 x i8]* @str.6, i64 0, i64 0))
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([36 x i8], [36 x i8]* @str.7, i64 0, i64 0))
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([42 x i8], [42 x i8]* @str.8, i64 0, i64 0))
%6 = tail call i32 @exit(i32 1)
unreachable
}