#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 omp_is_initial_device();
int /*<<< orphan*/ printf(char *, ...);
int main(void) {
  int isHost = 1;
#pragma omp target map(tofrom : isHost)
  {
    isHost = omp_is_initial_device();
    printf("Hello world. %d\n", 100);
    for (int i = 0; i < 5; i++) {
      printf("Hello world. iteration %d\n", i);
    }
  }
  printf("Target region executed on the %s\n", isHost ? "host" : "device");
  return isHost;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x1,-0x8(%rbp)
mov    $0x0,%al
call   1040 <omp_is_initial_device@plt>
mov    %eax,-0x8(%rbp)
lea    0xeb9(%rip),%rdi
mov    $0x64,%esi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0xc(%rbp)
cmpl   $0x5,-0xc(%rbp)
jge    1183 <main+0x63>
mov    -0xc(%rbp),%esi
lea    0xea3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    115a <main+0x3a>
mov    -0x8(%rbp),%ecx
lea    0xec6(%rip),%rsi
lea    0xeba(%rip),%rax
cmp    $0x0,%ecx
cmovne %rax,%rsi
lea    0xe8a(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
push   %rax
xor    %eax,%eax
call   1040 <omp_is_initial_device@plt>
mov    %eax,%ebp
lea    0xecd(%rip),%rdi
mov    $0x64,%esi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xecb(%rip),%rbx
mov    %rbx,%rdi
xor    %esi,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x1,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x4,%esi
xor    %eax,%eax
call   1030 <printf@plt>
test   %ebp,%ebp
lea    0xebc(%rip),%rax
lea    0xeb0(%rip),%rsi
cmove  %rax,%rsi
lea    0xe83(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %ebp,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [17 x i8] c"Hello world. %d\0A\00"
@.str.1 = [27 x i8] c"Hello world. iteration %d\0A\00"
@.str.2 = [34 x i8] c"Target region executed on the %s\0A\00"
@.str.3 = [5 x i8] c"host\00"
@.str.4 = [7 x i8] c"device\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
store i32 1, i32* %2
%4 = call i32 (...) @omp_is_initial_device()
store i32 %4, i32* %2
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0), i32 100)
store i32 0, i32* %3
br label %6
6: ; preds = %12, %0
%7 = load i32, i32* %3
%8 = icmp slt i32 %7, 5
br i1 %8, label %9, label %15
9: ; preds = %6
%10 = load i32, i32* %3
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.1, i64 0, i64 0), i32 %10)
br label %12
12: ; preds = %9
%13 = load i32, i32* %3
%14 = add nsw i32 %13, 1
store i32 %14, i32* %3
br label %6
15: ; preds = %6
%16 = load i32, i32* %2
%17 = icmp ne i32 %16, 0
%18 = zext i1 %17 to i64
%19 = select i1 %17, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.4, i64 0, i64 0)
%20 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([34 x i8], [34 x i8]* @.str.2, i64 0, i64 0), i8* %19)
%21 = load i32, i32* %2
ret i32 %21
}

LLVM IR (-O2):
@.str = [17 x i8] c"Hello world. %d\0A\00"
@.str.1 = [27 x i8] c"Hello world. iteration %d\0A\00"
@.str.2 = [34 x i8] c"Target region executed on the %s\0A\00"
@.str.3 = [5 x i8] c"host\00"
@.str.4 = [7 x i8] c"device\00"
define i32 @main() {
%1 = tail call i32 (...) @omp_is_initial_device()
%2 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0), i32 100)
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([27 x i8], [27 x i8]* @.str.1, i64 0, i64 0), i32 0)
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([27 x i8], [27 x i8]* @.str.1, i64 0, i64 0), i32 1)
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([27 x i8], [27 x i8]* @.str.1, i64 0, i64 0), i32 2)
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([27 x i8], [27 x i8]* @.str.1, i64 0, i64 0), i32 3)
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([27 x i8], [27 x i8]* @.str.1, i64 0, i64 0), i32 4)
%8 = icmp eq i32 %1, 0
%9 = select i1 %8, i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.4, i64 0, i64 0), i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.3, i64 0, i64 0)
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([34 x i8], [34 x i8]* @.str.2, i64 0, i64 0), i8* %9)
ret i32 %1
}