#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 atoi(char *);
int catalan(int);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *);
int /*<<< orphan*/ printf(char *, int, int);
int /*<<< orphan*/ stderr;
int main(int argc, char *argv[]) {
  if (argc < 2) {
    fprintf(stderr, "Parameters error!\nUsage: ./1 <n>\n");
    return -1;
  }
  printf("Catalan(%d) = %d\n", atoi(argv[1]), catalan(atoi(argv[1])));
  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    1181 <main+0x41>
mov    0x2e79(%rip),%rax
mov    (%rax),%edi
lea    0xe90(%rip),%rsi
call   1050 <fprintf@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    11bd <main+0x7d>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1060 <atoi@plt>
mov    %eax,-0x14(%rbp)
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1060 <atoi@plt>
mov    %eax,%edi
call   1030 <catalan@plt>
mov    -0x14(%rbp),%esi
mov    %eax,%edx
lea    0xe71(%rip),%rdi
call   1040 <printf@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
cmp    $0x1,%edi
jg     1162 <main+0x22>
mov    0x2e93(%rip),%rax
mov    (%rax),%edi
lea    0xeaa(%rip),%rsi
call   1050 <fprintf@plt>
mov    $0xffffffff,%eax
pop    %rbx
ret
mov    0x8(%rsi),%rdi
call   1060 <atoi@plt>
mov    %eax,%ebx
mov    %eax,%edi
call   1030 <catalan@plt>
lea    0xea7(%rip),%rdi
mov    %ebx,%esi
mov    %eax,%edx
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@stderr = global i32 0
@.str = [34 x i8] c"Parameters error!\0AUsage: ./1 <n>\0A\00"
@.str.1 = [18 x i8] c"Catalan(%d) = %d\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%6 = load i32, i32* %4
%7 = icmp slt i32 %6, 2
br i1 %7, label %8, label %11
8: ; preds = %2
%9 = load i32, i32* @stderr
%10 = call i32 @fprintf(i32 %9, i8* getelementptr inbounds ([34 x i8], [34 x i8]* @.str, i64 0, i64 0))
store i32 -1, i32* %3
br label %22
11: ; preds = %2
%12 = load i8**, i8*** %5
%13 = getelementptr inbounds i8*, i8** %12, i64 1
%14 = load i8*, i8** %13
%15 = call i32 @atoi(i8* %14)
%16 = load i8**, i8*** %5
%17 = getelementptr inbounds i8*, i8** %16, i64 1
%18 = load i8*, i8** %17
%19 = call i32 @atoi(i8* %18)
%20 = call i32 @catalan(i32 %19)
%21 = call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.1, i64 0, i64 0), i32 %15, i32 %20)
store i32 0, i32* %3
br label %22
22: ; preds = %11, %8
%23 = load i32, i32* %3
ret i32 %23
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [34 x i8] c"Parameters error!\0AUsage: ./1 <n>\0A\00"
@.str.1 = [18 x i8] c"Catalan(%d) = %d\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp slt i32 %0, 2
br i1 %3, label %4, label %7
4: ; preds = %2
%5 = load i32, i32* @stderr
%6 = tail call i32 @fprintf(i32 %5, i8* getelementptr inbounds ([34 x i8], [34 x i8]* @.str, i64 0, i64 0))
br label %13
7: ; preds = %2
%8 = getelementptr inbounds i8*, i8** %1, i64 1
%9 = load i8*, i8** %8
%10 = tail call i32 @atoi(i8* %9)
%11 = tail call i32 @catalan(i32 %10)
%12 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.1, i64 0, i64 0), i32 %10, i32 %11)
br label %13
13: ; preds = %7, %4
%14 = phi i32 [ -1, %4 ], [ 0, %7 ]
ret i32 %14
}