#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 /*<<< orphan*/ exit(int);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *);
int omp_get_thread_num();
int /*<<< orphan*/ printf(char *, int, int);
int /*<<< orphan*/ stderr;
int main(int argc, char **argv) {
  int i, n = 9;
  if (argc < 2) {
    fprintf(stderr, "\n[ERROR] - Falta nº iteraciones \n");
    exit(-1);
  }
  n = atoi(argv[1]);
#pragma omp parallel
  {
#pragma omp for
    for (i = 0; i < n; i++)
      printf("thread %d ejecuta la iteración %d del bucle\n",
             omp_get_thread_num(), i);
  }
  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)
movl   $0x9,-0x18(%rbp)
cmpl   $0x2,-0x8(%rbp)
jge    1196 <main+0x46>
mov    0x2e62(%rip),%rax
mov    (%rax),%edi
lea    0xe79(%rip),%rsi
call   1050 <fprintf@plt>
mov    $0xffffffff,%edi
call   1070 <exit@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1060 <atoi@plt>
mov    %eax,-0x18(%rbp)
movl   $0x0,-0x14(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0x18(%rbp),%eax
jge    11df <main+0x8f>
mov    $0x0,%al
call   1030 <omp_get_thread_num@plt>
mov    %eax,%esi
mov    -0x14(%rbp),%edx
lea    0xe57(%rip),%rdi
call   1040 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    11ad <main+0x5d>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r14
push   %rbx
cmp    $0x1,%edi
jle    11a1 <main+0x51>
mov    0x8(%rsi),%rdi
call   1060 <atoi@plt>
test   %eax,%eax
jle    119a <main+0x4a>
mov    %eax,%ebx
lea    0xeb4(%rip),%r14
xor    %ebp,%ebp
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
xor    %eax,%eax
call   1030 <omp_get_thread_num@plt>
mov    %r14,%rdi
mov    %eax,%esi
mov    %ebp,%edx
call   1040 <printf@plt>
add    $0x1,%ebp
cmp    %ebp,%ebx
jne    1180 <main+0x30>
xor    %eax,%eax
pop    %rbx
pop    %r14
pop    %rbp
ret
mov    0x2e38(%rip),%rax
mov    (%rax),%edi
lea    0xe4f(%rip),%rsi
call   1050 <fprintf@plt>
mov    $0xffffffff,%edi
call   1070 <exit@plt>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [35 x i8] c"\0A[ERROR] - Falta n\C2\BA iteraciones \0A\00"
@.str.1 = [46 x i8] c"thread %d ejecuta la iteraci\C3\B3n %d del bucle\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
store i32 9, i32* %7
%8 = load i32, i32* %4
%9 = icmp slt i32 %8, 2
br i1 %9, label %10, label %14
10: ; preds = %2
%11 = load i32, i32* @stderr
%12 = call i32 @fprintf(i32 %11, i8* getelementptr inbounds ([35 x i8], [35 x i8]* @.str, i64 0, i64 0))
%13 = call i32 @exit(i32 -1)
unreachable
14: ; preds = %2
%15 = load i8**, i8*** %5
%16 = getelementptr inbounds i8*, i8** %15, i64 1
%17 = load i8*, i8** %16
%18 = call i32 @atoi(i8* %17)
store i32 %18, i32* %7
store i32 0, i32* %6
br label %19
19: ; preds = %27, %14
%20 = load i32, i32* %6
%21 = load i32, i32* %7
%22 = icmp slt i32 %20, %21
br i1 %22, label %23, label %30
23: ; preds = %19
%24 = call i32 (...) @omp_get_thread_num()
%25 = load i32, i32* %6
%26 = call i32 @printf(i8* getelementptr inbounds ([46 x i8], [46 x i8]* @.str.1, i64 0, i64 0), i32 %24, i32 %25)
br label %27
27: ; preds = %23
%28 = load i32, i32* %6
%29 = add nsw i32 %28, 1
store i32 %29, i32* %6
br label %19
30: ; preds = %19
ret i32 0
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [35 x i8] c"\0A[ERROR] - Falta n\C2\BA iteraciones \0A\00"
@.str.1 = [46 x i8] c"thread %d ejecuta la iteraci\C3\B3n %d del bucle\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp slt i32 %0, 2
br i1 %3, label %4, label %8
4: ; preds = %2
%5 = load i32, i32* @stderr
%6 = tail call i32 @fprintf(i32 %5, i8* getelementptr inbounds ([35 x i8], [35 x i8]* @.str, i64 0, i64 0))
%7 = tail call i32 @exit(i32 -1)
unreachable
8: ; preds = %2
%9 = getelementptr inbounds i8*, i8** %1, i64 1
%10 = load i8*, i8** %9
%11 = tail call i32 @atoi(i8* %10)
%12 = icmp sgt i32 %11, 0
br i1 %12, label %13, label %19
13: ; preds = %8, %13
%14 = phi i32 [ %17, %13 ], [ 0, %8 ]
%15 = tail call i32 (...) @omp_get_thread_num()
%16 = tail call i32 @printf(i8* getelementptr inbounds ([46 x i8], [46 x i8]* @.str.1, i64 0, i64 0), i32 %15, i32 %14)
%17 = add nuw nsw i32 %14, 1
%18 = icmp eq i32 %17, %11
br i1 %18, label %19, label %13
19: ; preds = %13, %8
ret i32 0
}