#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 EXIT_FAILURE;
int EXIT_SUCCESS;
size_t atoi(char *);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, ...);
int /*<<< orphan*/ stderr;
int /*<<< orphan*/ stdout;
int /*<<< orphan*/ syracuse(size_t);
int main(int argc, char *argv[]) {
  size_t number;
  if (argc != 2) {
    fprintf(stderr, "syracuses number\n");
    return EXIT_FAILURE;
  }
  number = atoi(argv[1]);
  fprintf(stdout, "Syracuse\'s conjecture reached in %zu loops\n",
          syracuse(number));
  return EXIT_SUCCESS;
}


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)
je     1178 <main+0x48>
mov    0x2e89(%rip),%rax
mov    (%rax),%edi
lea    0xea0(%rip),%rsi
mov    $0x0,%al
call   1030 <fprintf@plt>
mov    0x2e6a(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
jmp    11bd <main+0x8d>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1050 <atoi@plt>
mov    %rax,-0x18(%rbp)
mov    0x2e40(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x1c(%rbp)
mov    -0x18(%rbp),%rdi
call   1040 <syracuse@plt>
mov    -0x1c(%rbp),%edi
mov    %eax,%edx
lea    0xe68(%rip),%rsi
mov    $0x0,%al
call   1030 <fprintf@plt>
mov    0x2e10(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
cmp    $0x2,%edi
jne    116b <main+0x3b>
mov    0x8(%rsi),%rdi
call   1050 <atoi@plt>
mov    0x2e8a(%rip),%rcx
mov    (%rcx),%ebx
mov    %rax,%rdi
call   1040 <syracuse@plt>
lea    0xebb(%rip),%rsi
mov    %ebx,%edi
mov    %eax,%edx
xor    %eax,%eax
call   1030 <fprintf@plt>
mov    0x2e5f(%rip),%rax
jmp    1189 <main+0x59>
mov    0x2e6e(%rip),%rax
mov    (%rax),%edi
lea    0xe85(%rip),%rsi
xor    %eax,%eax
call   1030 <fprintf@plt>
mov    0x2e4f(%rip),%rax
mov    (%rax),%eax
pop    %rbx
ret

LLVM IR (-O0):
@stderr = global i32 0
@.str = [18 x i8] c"syracuses number\0A\00"
@EXIT_FAILURE = global i32 0
@stdout = global i32 0
@.str.1 = [44 x i8] c"Syracuse's conjecture reached in %zu loops\0A\00"
@EXIT_SUCCESS = global i32 0
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i64
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%7 = load i32, i32* %4
%8 = icmp ne i32 %7, 2
br i1 %8, label %9, label %13
9: ; preds = %2
%10 = load i32, i32* @stderr
%11 = call i32 (i32, i8*, ...) @fprintf(i32 %10, i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0))
%12 = load i32, i32* @EXIT_FAILURE
store i32 %12, i32* %3
br label %23
13: ; preds = %2
%14 = load i8**, i8*** %5
%15 = getelementptr inbounds i8*, i8** %14, i64 1
%16 = load i8*, i8** %15
%17 = call i64 @atoi(i8* %16)
store i64 %17, i64* %6
%18 = load i32, i32* @stdout
%19 = load i64, i64* %6
%20 = call i32 @syracuse(i64 %19)
%21 = call i32 (i32, i8*, ...) @fprintf(i32 %18, i8* getelementptr inbounds ([44 x i8], [44 x i8]* @.str.1, i64 0, i64 0), i32 %20)
%22 = load i32, i32* @EXIT_SUCCESS
store i32 %22, i32* %3
br label %23
23: ; preds = %13, %9
%24 = load i32, i32* %3
ret i32 %24
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [18 x i8] c"syracuses number\0A\00"
@EXIT_FAILURE = global i32 0
@stdout = global i32 0
@.str.1 = [44 x i8] c"Syracuse's conjecture reached in %zu loops\0A\00"
@EXIT_SUCCESS = global i32 0
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 2
br i1 %3, label %7, label %4
4: ; preds = %2
%5 = load i32, i32* @stderr
%6 = tail call i32 (i32, i8*, ...) @fprintf(i32 %5, i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0))
br label %14
7: ; preds = %2
%8 = getelementptr inbounds i8*, i8** %1, i64 1
%9 = load i8*, i8** %8
%10 = tail call i64 @atoi(i8* %9)
%11 = load i32, i32* @stdout
%12 = tail call i32 @syracuse(i64 %10)
%13 = tail call i32 (i32, i8*, ...) @fprintf(i32 %11, i8* getelementptr inbounds ([44 x i8], [44 x i8]* @.str.1, i64 0, i64 0), i32 %12)
br label %14
14: ; preds = %7, %4
%15 = phi i32* [ @EXIT_FAILURE, %4 ], [ @EXIT_SUCCESS, %7 ]
%16 = load i32, i32* %15
ret i32 %16
}