#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 */
typedef int /*<<< orphan*/ FILE;

/* Variables and functions */
void *atoi(char *);
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
int /*<<< orphan*/ generate_file(int, unsigned int, int /*<<< orphan*/ *);
int /*<<< orphan*/ perror(char *);
int /*<<< orphan*/ stderr;
int main(int argc, char **argv) {
  int n;
  unsigned int seed;
  FILE *fout;
  if (argc < 2) {
    fprintf(stderr, "Usage: %s <n> [<seed>]\n", argv[0]);
    exit(1);
  }
  n = atoi(argv[1]);
  if (argc == 3) {
    seed = atoi(argv[1]);
  }
  fout = fopen("data.txt", "w");
  if (!fout) {
    perror("gentxt");
  }
  generate_file(n, seed, fout);
  fclose(fout);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x2,-0x8(%rbp)
jge    11b6 <main+0x46>
mov    0x2e49(%rip),%rax
mov    (%rax),%edi
mov    -0x10(%rbp),%rax
mov    (%rax),%rdx
lea    0xe59(%rip),%rsi
call   1040 <fprintf@plt>
mov    $0x1,%edi
call   1090 <exit@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1080 <atoi@plt>
mov    %eax,-0x14(%rbp)
cmpl   $0x3,-0x8(%rbp)
jne    11e0 <main+0x70>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1080 <atoi@plt>
mov    %eax,-0x18(%rbp)
lea    0xe31(%rip),%rdi
lea    0xe33(%rip),%rsi
call   1060 <fopen@plt>
mov    %rax,-0x20(%rbp)
cmpq   $0x0,-0x20(%rbp)
jne    120e <main+0x9e>
lea    0xe1a(%rip),%rdi
call   1070 <perror@plt>
mov    -0x14(%rbp),%edi
mov    -0x18(%rbp),%esi
mov    -0x20(%rbp),%rdx
call   1050 <generate_file@plt>
mov    -0x20(%rbp),%rdi
call   1030 <fclose@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
push   %rax
cmp    $0x1,%edi
jle    11ce <main+0x5e>
mov    0x8(%rsi),%rdi
call   1080 <atoi@plt>
mov    %rax,%r14
lea    0xe8c(%rip),%rdi
lea    0xe8e(%rip),%rsi
call   1060 <fopen@plt>
mov    %rax,%rbx
test   %rax,%rax
je     11c0 <main+0x50>
mov    %r14d,%edi
mov    %r14d,%esi
mov    %rbx,%rdx
call   1050 <generate_file@plt>
mov    %rbx,%rdi
call   1030 <fclose@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret
lea    0xe5c(%rip),%rdi
call   1070 <perror@plt>
jmp    11a0 <main+0x30>
mov    0x2e0b(%rip),%rax
mov    (%rax),%edi
mov    (%rsi),%rdx
lea    0xe1f(%rip),%rsi
call   1040 <fprintf@plt>
mov    $0x1,%edi
call   1090 <exit@plt>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [24 x i8] c"Usage: %s <n> [<seed>]\0A\00"
@.str.1 = [9 x i8] c"data.txt\00"
@.str.2 = [2 x i8] c"w\00"
@.str.3 = [7 x i8] c"gentxt\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
%8 = alloca i32*
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%9 = load i32, i32* %4
%10 = icmp slt i32 %9, 2
br i1 %10, label %11, label %18
11: ; preds = %2
%12 = load i32, i32* @stderr
%13 = load i8**, i8*** %5
%14 = getelementptr inbounds i8*, i8** %13, i64 0
%15 = load i8*, i8** %14
%16 = call i32 @fprintf(i32 %12, i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str, i64 0, i64 0), i8* %15)
%17 = call i32 @exit(i32 1)
unreachable
18: ; preds = %2
%19 = load i8**, i8*** %5
%20 = getelementptr inbounds i8*, i8** %19, i64 1
%21 = load i8*, i8** %20
%22 = call i8* @atoi(i8* %21)
%23 = ptrtoint i8* %22 to i32
store i32 %23, i32* %6
%24 = load i32, i32* %4
%25 = icmp eq i32 %24, 3
br i1 %25, label %26, label %32
26: ; preds = %18
%27 = load i8**, i8*** %5
%28 = getelementptr inbounds i8*, i8** %27, i64 1
%29 = load i8*, i8** %28
%30 = call i8* @atoi(i8* %29)
%31 = ptrtoint i8* %30 to i32
store i32 %31, i32* %7
br label %32
32: ; preds = %26, %18
%33 = call i32* @fopen(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
store i32* %33, i32** %8
%34 = load i32*, i32** %8
%35 = icmp ne i32* %34, null
br i1 %35, label %38, label %36
36: ; preds = %32
%37 = call i32 @perror(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.3, i64 0, i64 0))
br label %38
38: ; preds = %36, %32
%39 = load i32, i32* %6
%40 = load i32, i32* %7
%41 = load i32*, i32** %8
%42 = call i32 @generate_file(i32 %39, i32 %40, i32* %41)
%43 = load i32*, i32** %8
%44 = call i32 @fclose(i32* %43)
ret i32 0
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [24 x i8] c"Usage: %s <n> [<seed>]\0A\00"
@.str.1 = [9 x i8] c"data.txt\00"
@.str.2 = [2 x i8] c"w\00"
@.str.3 = [7 x i8] c"gentxt\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp slt i32 %0, 2
br i1 %3, label %4, label %9
4: ; preds = %2
%5 = load i32, i32* @stderr
%6 = load i8*, i8** %1
%7 = tail call i32 @fprintf(i32 %5, i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str, i64 0, i64 0), i8* %6)
%8 = tail call i32 @exit(i32 1)
unreachable
9: ; preds = %2
%10 = getelementptr inbounds i8*, i8** %1, i64 1
%11 = load i8*, i8** %10
%12 = tail call i8* @atoi(i8* %11)
%13 = tail call i32* @fopen(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
%14 = icmp eq i32* %13, null
br i1 %14, label %15, label %17
15: ; preds = %9
%16 = tail call i32 @perror(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.3, i64 0, i64 0))
br label %17
17: ; preds = %15, %9
%18 = ptrtoint i8* %12 to i64
%19 = trunc i64 %18 to i32
%20 = tail call i32 @generate_file(i32 %19, i32 %19, i32* %13)
%21 = tail call i32 @fclose(i32* %13)
ret i32 0
}