#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(char *argv0, char *reason) {
  if (reason != NULL)
    printf("\n\tError: %s\n\n", reason);
  printf("usage: %s <file> <char> <size>\n", argv0);
  printf("   creates a new <file> full of <char> characters with a size if "
         "<size> bytes\n");
  exit(1);
}


x86 assembly (clang, -O0):
<usage>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpq   $0x0,-0x10(%rbp)
je     114d <usage+0x2d>
mov    -0x10(%rbp),%rsi
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%rsi
lea    0xeb6(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec8(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    $0x1,%edi
call   1040 <exit@plt>

x86 assembly (clang, -O2):
<usage>:
push   %rbx
mov    %rdi,%rbx
test   %rsi,%rsi
je     1147 <usage+0x17>
lea    0xec0(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xec0(%rip),%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xecf(%rip),%rdi
call   1030 <puts@plt>
mov    $0x1,%edi
call   1050 <exit@plt>

LLVM IR (-O0):
@.str = [14 x i8] c"\0A\09Error: %s\0A\0A\00"
@.str.1 = [32 x i8] c"usage: %s <file> <char> <size>\0A\00"
@.str.2 = [79 x i8] c" creates a new <file> full of <char> characters with a size if <size> bytes\0A\00"
define void @usage(i8* %0, i8* %1) {
%3 = alloca i8*
%4 = alloca i8*
store i8* %0, i8** %3
store i8* %1, i8** %4
%5 = load i8*, i8** %4
%6 = icmp ne i8* %5, null
br i1 %6, label %7, label %10
7: ; preds = %2
%8 = load i8*, i8** %4
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i8* %8)
br label %10
10: ; preds = %7, %2
%11 = load i8*, i8** %3
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str.1, i64 0, i64 0), i8* %11)
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([79 x i8], [79 x i8]* @.str.2, i64 0, i64 0))
%14 = call i32 @exit(i32 1)
unreachable
}

LLVM IR (-O2):
@.str = [14 x i8] c"\0A\09Error: %s\0A\0A\00"
@.str.1 = [32 x i8] c"usage: %s <file> <char> <size>\0A\00"
@str = [78 x i8] c" creates a new <file> full of <char> characters with a size if <size> bytes\00"
define void @usage(i8* %0, i8* %1) {
%3 = icmp eq i8* %1, null
br i1 %3, label %6, label %4
4: ; preds = %2
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i8* %1)
br label %6
6: ; preds = %4, %2
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([32 x i8], [32 x i8]* @.str.1, i64 0, i64 0), i8* %0)
%8 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([78 x i8], [78 x i8]* @str, i64 0, i64 0))
%9 = tail call i32 @exit(i32 1)
unreachable
}