#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 */
typedef int /*<<< orphan*/ sigset_t;

/* Variables and functions */
int /*<<< orphan*/ SIGALRM;
int /*<<< orphan*/ SIG_UNBLOCK;
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ perror(char *);
int /*<<< orphan*/ sigaddset(int /*<<< orphan*/ *, int /*<<< orphan*/);
int /*<<< orphan*/ sigemptyset(int /*<<< orphan*/ *);
int sigprocmask(int /*<<< orphan*/, int /*<<< orphan*/ *, int /*<<< orphan*/ *);
void tlmu_hosttimer_unblock(void) {
  sigset_t mask;
  sigemptyset(&mask);
  sigaddset(&mask, SIGALRM);
  if (sigprocmask(SIG_UNBLOCK, &mask, NULL) == -1) {
    perror("sigprocmask");
    exit(1);
  }
}


x86 assembly (clang, -O0):
<tlmu_hosttimer_unblock>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
lea    -0x4(%rbp),%rdi
call   1040 <sigemptyset@plt>
mov    0x2e78(%rip),%rax
mov    (%rax),%esi
lea    -0x4(%rbp),%rdi
call   1070 <sigaddset@plt>
mov    0x2e6e(%rip),%rax
mov    (%rax),%edi
lea    -0x4(%rbp),%rsi
xor    %eax,%eax
mov    %eax,%edx
call   1030 <sigprocmask@plt>
cmp    $0xffffffff,%eax
jne    11a8 <tlmu_hosttimer_unblock+0x58>
lea    0xe67(%rip),%rdi
call   1050 <perror@plt>
mov    $0x1,%edi
call   1060 <exit@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<tlmu_hosttimer_unblock>:
push   %rbx
sub    $0x10,%rsp
lea    0xc(%rsp),%rbx
mov    %rbx,%rdi
call   1040 <sigemptyset@plt>
mov    0x2e77(%rip),%rax
mov    (%rax),%esi
mov    %rbx,%rdi
call   1070 <sigaddset@plt>
mov    0x2e6e(%rip),%rax
mov    (%rax),%edi
mov    %rbx,%rsi
xor    %edx,%edx
call   1030 <sigprocmask@plt>
cmp    $0xffffffff,%eax
je     1191 <tlmu_hosttimer_unblock+0x41>
add    $0x10,%rsp
pop    %rbx
ret
lea    0xe68(%rip),%rdi
call   1050 <perror@plt>
mov    $0x1,%edi
call   1060 <exit@plt>

LLVM IR (-O0):
@SIGALRM = global i32 0
@SIG_UNBLOCK = global i32 0
@.str = [12 x i8] c"sigprocmask\00"
define void @tlmu_hosttimer_unblock() {
%1 = alloca i32
%2 = call i32 @sigemptyset(i32* %1)
%3 = load i32, i32* @SIGALRM
%4 = call i32 @sigaddset(i32* %1, i32 %3)
%5 = load i32, i32* @SIG_UNBLOCK
%6 = call i32 @sigprocmask(i32 %5, i32* %1, i32* null)
%7 = icmp eq i32 %6, -1
br i1 %7, label %8, label %11
8: ; preds = %0
%9 = call i32 @perror(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i64 0, i64 0))
%10 = call i32 @exit(i32 1)
unreachable
11: ; preds = %0
ret void
}

LLVM IR (-O2):
@SIGALRM = global i32 0
@SIG_UNBLOCK = global i32 0
@.str = [12 x i8] c"sigprocmask\00"
define void @tlmu_hosttimer_unblock() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = call i32 @sigemptyset(i32* %1)
%4 = load i32, i32* @SIGALRM
%5 = call i32 @sigaddset(i32* %1, i32 %4)
%6 = load i32, i32* @SIG_UNBLOCK
%7 = call i32 @sigprocmask(i32 %6, i32* %1, i32* null)
%8 = icmp eq i32 %7, -1
br i1 %8, label %9, label %12
9: ; preds = %0
%10 = call i32 @perror(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i64 0, i64 0))
%11 = call i32 @exit(i32 1)
unreachable
12: ; preds = %0
ret void
}