#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*/ atoi(char *);
int omp_get_num_threads();
int omp_get_thread_num();
int /*<<< orphan*/ omp_set_num_threads(int /*<<< orphan*/);
int /*<<< orphan*/ printf(char *, ...);
int main(int argc, char **argv) {
  printf("\n");
  if (argc > 1) {
    omp_set_num_threads(atoi(argv[1]));
  }
  {
    int id = omp_get_thread_num();
    int numThreads = omp_get_num_threads();
    if (id == 0) {
      printf("Greetings from the master, # %d of %d threads\n", id, numThreads);
    } else {
      printf("Greetings from a worker, # %d of %d threads\n", id, numThreads);
    }
  }
  printf("\n");
  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)
lea    0xeed(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
cmpl   $0x1,-0x8(%rbp)
jle    1192 <main+0x42>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1070 <atoi@plt>
mov    %eax,%edi
call   1060 <omp_set_num_threads@plt>
mov    $0x0,%al
call   1030 <omp_get_thread_num@plt>
mov    %eax,-0x14(%rbp)
mov    $0x0,%al
call   1050 <omp_get_num_threads@plt>
mov    %eax,-0x18(%rbp)
cmpl   $0x0,-0x14(%rbp)
jne    11c9 <main+0x79>
mov    -0x14(%rbp),%esi
mov    -0x18(%rbp),%edx
lea    0xe43(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
jmp    11dd <main+0x8d>
mov    -0x14(%rbp),%esi
mov    -0x18(%rbp),%edx
lea    0xe59(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xe76(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
push   %rax
mov    %rsi,%rbx
mov    %edi,%ebp
mov    $0xa,%edi
call   1030 <putchar@plt>
cmp    $0x2,%ebp
jl     1187 <main+0x27>
mov    0x8(%rbx),%rdi
call   1080 <atoi@plt>
mov    %eax,%edi
call   1070 <omp_set_num_threads@plt>
xor    %eax,%eax
call   1040 <omp_get_thread_num@plt>
mov    %eax,%ebx
xor    %eax,%eax
call   1060 <omp_get_num_threads@plt>
test   %ebx,%ebx
je     11a6 <main+0x46>
lea    0xe8d(%rip),%rdi
mov    %ebx,%esi
jmp    11af <main+0x4f>
lea    0xe53(%rip),%rdi
xor    %esi,%esi
mov    %eax,%edx
xor    %eax,%eax
call   1050 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [2 x i8] c"\0A\00"
@.str.1 = [47 x i8] c"Greetings from the master, # %d of %d threads\0A\00"
@.str.2 = [45 x i8] c"Greetings from a worker, # %d of %d threads\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
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%9 = load i32, i32* %4
%10 = icmp sgt i32 %9, 1
br i1 %10, label %11, label %17
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 = call i32 @omp_set_num_threads(i32 %15)
br label %17
17: ; preds = %11, %2
%18 = call i32 (...) @omp_get_thread_num()
store i32 %18, i32* %6
%19 = call i32 (...) @omp_get_num_threads()
store i32 %19, i32* %7
%20 = load i32, i32* %6
%21 = icmp eq i32 %20, 0
br i1 %21, label %22, label %26
22: ; preds = %17
%23 = load i32, i32* %6
%24 = load i32, i32* %7
%25 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([47 x i8], [47 x i8]* @.str.1, i64 0, i64 0), i32 %23, i32 %24)
br label %30
26: ; preds = %17
%27 = load i32, i32* %6
%28 = load i32, i32* %7
%29 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([45 x i8], [45 x i8]* @.str.2, i64 0, i64 0), i32 %27, i32 %28)
br label %30
30: ; preds = %26, %22
%31 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [47 x i8] c"Greetings from the master, # %d of %d threads\0A\00"
@.str.2 = [45 x i8] c"Greetings from a worker, # %d of %d threads\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = tail call i32 @putchar(i32 10)
%4 = icmp sgt i32 %0, 1
br i1 %4, label %5, label %10
5: ; preds = %2
%6 = getelementptr inbounds i8*, i8** %1, i64 1
%7 = load i8*, i8** %6
%8 = tail call i32 @atoi(i8* %7)
%9 = tail call i32 @omp_set_num_threads(i32 %8)
br label %10
10: ; preds = %5, %2
%11 = tail call i32 (...) @omp_get_thread_num()
%12 = tail call i32 (...) @omp_get_num_threads()
%13 = icmp eq i32 %11, 0
br i1 %13, label %14, label %16
14: ; preds = %10
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([47 x i8], [47 x i8]* @.str.1, i64 0, i64 0), i32 0, i32 %12)
br label %18
16: ; preds = %10
%17 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([45 x i8], [45 x i8]* @.str.2, i64 0, i64 0), i32 %11, i32 %12)
br label %18
18: ; preds = %16, %14
%19 = tail call i32 @putchar(i32 10)
ret i32 0
}