#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 usage(void) {
  printf("usage: unixtime [-x] [<number>]\n\n");
  printf("Print UNIX time (seconds since the start of epoch: 1970-01-01 "
         "00:00:00)\n");
  printf("in a human readable form.\n");
  printf("If no arguments are given -- the numbers are read from stdin.\n\n");
  printf("  -h -- display this message.\n");
  printf("  -x -- convert a hexadecimal number.\n");
}


x86 assembly (clang, -O0):
<usage>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
lea    0xee1(%rip),%rdi
call   1030 <printf@plt>
lea    0xef7(%rip),%rdi
call   1030 <printf@plt>
lea    0xf34(%rip),%rdi
call   1030 <printf@plt>
lea    0xf43(%rip),%rdi
call   1030 <printf@plt>
lea    0xf77(%rip),%rdi
call   1030 <printf@plt>
lea    0xf8a(%rip),%rdi
call   1030 <printf@plt>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<usage>:
push   %rax
lea    0xee8(%rip),%rdi
call   1030 <puts@plt>
lea    0xefd(%rip),%rdi
call   1030 <puts@plt>
lea    0xf39(%rip),%rdi
call   1030 <puts@plt>
lea    0xf47(%rip),%rdi
call   1030 <puts@plt>
lea    0xf7a(%rip),%rdi
call   1030 <puts@plt>
lea    0xf8c(%rip),%rdi
pop    %rax
jmp    1030 <puts@plt>

LLVM IR (-O0):
@.str = [34 x i8] c"usage: unixtime [-x] [<number>]\0A\0A\00"
@.str.1 = [73 x i8] c"Print UNIX time (seconds since the start of epoch: 1970-01-01 00:00:00)\0A\00"
@.str.2 = [27 x i8] c"in a human readable form.\0A\00"
@.str.3 = [64 x i8] c"If no arguments are given -- the numbers are read from stdin.\0A\0A\00"
@.str.4 = [31 x i8] c" -h -- display this message.\0A\00"
@.str.5 = [39 x i8] c" -x -- convert a hexadecimal number.\0A\00"
define i32 @usage() {
%1 = alloca i32
%2 = call i32 @printf(i8* getelementptr inbounds ([34 x i8], [34 x i8]* @.str, i64 0, i64 0))
%3 = call i32 @printf(i8* getelementptr inbounds ([73 x i8], [73 x i8]* @.str.1, i64 0, i64 0))
%4 = call i32 @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.2, i64 0, i64 0))
%5 = call i32 @printf(i8* getelementptr inbounds ([64 x i8], [64 x i8]* @.str.3, i64 0, i64 0))
%6 = call i32 @printf(i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.4, i64 0, i64 0))
%7 = call i32 @printf(i8* getelementptr inbounds ([39 x i8], [39 x i8]* @.str.5, i64 0, i64 0))
%8 = load i32, i32* %1
ret i32 %8
}

LLVM IR (-O2):
@str = [33 x i8] c"usage: unixtime [-x] [<number>]\0A\00"
@str.6 = [72 x i8] c"Print UNIX time (seconds since the start of epoch: 1970-01-01 00:00:00)\00"
@str.7 = [26 x i8] c"in a human readable form.\00"
@str.8 = [63 x i8] c"If no arguments are given -- the numbers are read from stdin.\0A\00"
@str.9 = [30 x i8] c" -h -- display this message.\00"
@str.10 = [38 x i8] c" -x -- convert a hexadecimal number.\00"
define i32 @usage() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([33 x i8], [33 x i8]* @str, i64 0, i64 0))
%2 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([72 x i8], [72 x i8]* @str.6, i64 0, i64 0))
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @str.7, i64 0, i64 0))
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([63 x i8], [63 x i8]* @str.8, i64 0, i64 0))
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([30 x i8], [30 x i8]* @str.9, i64 0, i64 0))
%6 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([38 x i8], [38 x i8]* @str.10, i64 0, i64 0))
ret i32 undef
}