#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*/ F_GETFL;
int /*<<< orphan*/ F_SETFL;
int O_NONBLOCK;
int fcntl(int, int /*<<< orphan*/, ...);
int /*<<< orphan*/ unused(char *, int);
int make_nonblocking(int fd) {
  int flags = fcntl(fd, F_GETFL);
  if (flags == -1) {
    do {
      unused("fcntl(%d, F_GETFL) failed", fd);
    } while (0);
    return -1;
  }
  if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1) {
    do {
      unused("fcntl(%d, F_SETFL) failed", fd);
    } while (0);
    return -1;
  }
  return 0;
}


x86 assembly (clang, -O0):
<make_nonblocking>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %edi,-0x8(%rbp)
mov    -0x8(%rbp),%edi
mov    0x2e9b(%rip),%rax
mov    (%rax),%esi
mov    $0x0,%al
call   1030 <fcntl@plt>
mov    %eax,-0xc(%rbp)
cmpl   $0xffffffff,-0xc(%rbp)
jne    116b <make_nonblocking+0x4b>
jmp    1150 <make_nonblocking+0x30>
mov    -0x8(%rbp),%esi
lea    0xea6(%rip),%rdi
call   1040 <unused@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    11ba <make_nonblocking+0x9a>
mov    -0x8(%rbp),%edi
mov    0x2e63(%rip),%rax
mov    (%rax),%esi
mov    -0xc(%rbp),%edx
mov    0x2e67(%rip),%rax
or     (%rax),%edx
mov    $0x0,%al
call   1030 <fcntl@plt>
cmp    $0xffffffff,%eax
jne    11b3 <make_nonblocking+0x93>
jmp    1198 <make_nonblocking+0x78>
mov    -0x8(%rbp),%esi
lea    0xe78(%rip),%rdi
call   1040 <unused@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    11ba <make_nonblocking+0x9a>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<make_nonblocking>:
push   %rbp
push   %rbx
push   %rax
mov    %edi,%ebx
mov    0x2ea4(%rip),%rax
mov    (%rax),%esi
xor    %ebp,%ebp
xor    %eax,%eax
call   1030 <fcntl@plt>
cmp    $0xffffffff,%eax
je     1167 <make_nonblocking+0x47>
mov    0x2e95(%rip),%rcx
mov    (%rcx),%esi
mov    0x2e9c(%rip),%rcx
or     (%rcx),%eax
mov    %ebx,%edi
mov    %eax,%edx
xor    %eax,%eax
call   1030 <fcntl@plt>
cmp    $0xffffffff,%eax
jne    117a <make_nonblocking+0x5a>
lea    0xeb5(%rip),%rdi
jmp    116e <make_nonblocking+0x4e>
lea    0xe92(%rip),%rdi
mov    %ebx,%esi
call   1040 <unused@plt>
mov    $0xffffffff,%ebp
mov    %ebp,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@F_GETFL = global i32 0
@.str = [26 x i8] c"fcntl(%d, F_GETFL) failed\00"
@F_SETFL = global i32 0
@O_NONBLOCK = global i32 0
@.str.1 = [26 x i8] c"fcntl(%d, F_SETFL) failed\00"
define i32 @make_nonblocking(i32 %0) {
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
store i32 %0, i32* %3
%5 = load i32, i32* %3
%6 = load i32, i32* @F_GETFL
%7 = call i32 (i32, i32, ...) @fcntl(i32 %5, i32 %6)
store i32 %7, i32* %4
%8 = load i32, i32* %4
%9 = icmp eq i32 %8, -1
br i1 %9, label %10, label %15
10: ; preds = %1
br label %11
11: ; preds = %10
%12 = load i32, i32* %3
%13 = call i32 @unused(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0), i32 %12)
br label %14
14: ; preds = %11
store i32 -1, i32* %2
br label %29
15: ; preds = %1
%16 = load i32, i32* %3
%17 = load i32, i32* @F_SETFL
%18 = load i32, i32* %4
%19 = load i32, i32* @O_NONBLOCK
%20 = or i32 %18, %19
%21 = call i32 (i32, i32, ...) @fcntl(i32 %16, i32 %17, i32 %20)
%22 = icmp eq i32 %21, -1
br i1 %22, label %23, label %28
23: ; preds = %15
br label %24
24: ; preds = %23
%25 = load i32, i32* %3
%26 = call i32 @unused(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.1, i64 0, i64 0), i32 %25)
br label %27
27: ; preds = %24
store i32 -1, i32* %2
br label %29
28: ; preds = %15
store i32 0, i32* %2
br label %29
29: ; preds = %28, %27, %14
%30 = load i32, i32* %2
ret i32 %30
}

LLVM IR (-O2):
@F_GETFL = global i32 0
@.str = [26 x i8] c"fcntl(%d, F_GETFL) failed\00"
@F_SETFL = global i32 0
@O_NONBLOCK = global i32 0
@.str.1 = [26 x i8] c"fcntl(%d, F_SETFL) failed\00"
define i32 @make_nonblocking(i32 %0) {
%2 = load i32, i32* @F_GETFL
%3 = tail call i32 (i32, i32, ...) @fcntl(i32 %0, i32 %2)
%4 = icmp eq i32 %3, -1
br i1 %4, label %11, label %5
5: ; preds = %1
%6 = load i32, i32* @F_SETFL
%7 = load i32, i32* @O_NONBLOCK
%8 = or i32 %7, %3
%9 = tail call i32 (i32, i32, ...) @fcntl(i32 %0, i32 %6, i32 %8)
%10 = icmp eq i32 %9, -1
br i1 %10, label %11, label %14
11: ; preds = %5, %1
%12 = phi i8* [ getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0), %1 ], [ getelementptr inbounds ([26 x i8], [26 x i8]* @.str.1, i64 0, i64 0), %5 ]
%13 = tail call i32 @unused(i8* %12, i32 %0)
br label %14
14: ; preds = %11, %5
%15 = phi i32 [ 0, %5 ], [ -1, %11 ]
ret i32 %15
}