#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 */
struct timeval {
  int tv_sec;
  scalar_t__ tv_usec;
};
typedef int /*<<< orphan*/ fd_set;

/* Variables and functions */
int /*<<< orphan*/ FD_SET(int, int /*<<< orphan*/ *);
int /*<<< orphan*/ FD_ZERO(int /*<<< orphan*/ *);
int /*<<< orphan*/ close(int);
int /*<<< orphan*/ gracefulshut(int);
int /*<<< orphan*/ select(int, int /*<<< orphan*/ *, int /*<<< orphan*/ *,
                          int /*<<< orphan*/ *, struct timeval *);
void gracefulclose(int left) {
  struct timeval tv;
  fd_set rdset;
  gracefulshut(left);
  tv.tv_usec = 0;
  tv.tv_sec = 1;
  FD_ZERO(&rdset);
  FD_SET(left, &rdset);
  select(left + 1, &rdset, NULL, NULL, &tv);
  close(left);
}


x86 assembly (clang, -O0):
<gracefulclose>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %edi,-0x4(%rbp)
mov    -0x4(%rbp),%edi
call   1060 <gracefulshut@plt>
movq   $0x0,-0x10(%rbp)
movl   $0x1,-0x18(%rbp)
lea    -0x1c(%rbp),%rdi
call   1040 <FD_ZERO@plt>
mov    -0x4(%rbp),%edi
lea    -0x1c(%rbp),%rsi
call   1070 <FD_SET@plt>
mov    -0x4(%rbp),%edi
add    $0x1,%edi
lea    -0x1c(%rbp),%rsi
xor    %eax,%eax
mov    %eax,%ecx
lea    -0x18(%rbp),%r8
mov    %rcx,%rdx
call   1050 <select@plt>
mov    -0x4(%rbp),%edi
call   1030 <close@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<gracefulclose>:
push   %r14
push   %rbx
sub    $0x18,%rsp
mov    %edi,%ebx
call   1060 <gracefulshut@plt>
movq   $0x0,0x10(%rsp)
movl   $0x1,0x8(%rsp)
lea    0x4(%rsp),%r14
mov    %r14,%rdi
call   1040 <FD_ZERO@plt>
mov    %ebx,%edi
mov    %r14,%rsi
call   1070 <FD_SET@plt>
lea    0x1(%rbx),%edi
lea    0x8(%rsp),%r8
mov    %r14,%rsi
xor    %edx,%edx
xor    %ecx,%ecx
call   1050 <select@plt>
mov    %ebx,%edi
call   1030 <close@plt>
add    $0x18,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
%struct.timeval = type { i32, i64 }
define void @gracefulclose(i32 %0) {
%2 = alloca i32
%3 = alloca %struct.timeval
%4 = alloca i32
store i32 %0, i32* %2
%5 = load i32, i32* %2
%6 = call i32 @gracefulshut(i32 %5)
%7 = getelementptr inbounds %struct.timeval, %struct.timeval* %3, i32 0, i32 1
store i64 0, i64* %7
%8 = getelementptr inbounds %struct.timeval, %struct.timeval* %3, i32 0, i32 0
store i32 1, i32* %8
%9 = call i32 @FD_ZERO(i32* %4)
%10 = load i32, i32* %2
%11 = call i32 @FD_SET(i32 %10, i32* %4)
%12 = load i32, i32* %2
%13 = add nsw i32 %12, 1
%14 = call i32 @select(i32 %13, i32* %4, i32* null, i32* null, %struct.timeval* %3)
%15 = load i32, i32* %2
%16 = call i32 @close(i32 %15)
ret void
}

LLVM IR (-O2):
%struct.timeval = type { i32, i64 }
define void @gracefulclose(i32 %0) {
%2 = alloca %struct.timeval
%3 = alloca i32
%4 = bitcast %struct.timeval* %2 to i8*
%5 = bitcast i32* %3 to i8*
%6 = tail call i32 @gracefulshut(i32 %0)
%7 = getelementptr inbounds %struct.timeval, %struct.timeval* %2, i64 0, i32 1
store i64 0, i64* %7
%8 = getelementptr inbounds %struct.timeval, %struct.timeval* %2, i64 0, i32 0
store i32 1, i32* %8
%9 = call i32 @FD_ZERO(i32* %3)
%10 = call i32 @FD_SET(i32 %0, i32* %3)
%11 = add nsw i32 %0, 1
%12 = call i32 @select(i32 %11, i32* %3, i32* null, i32* null, %struct.timeval* %2)
%13 = call i32 @close(i32 %0)
ret void
}