#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 */
union sigval {
  int sival_int;
};
typedef int pid_t;

/* Variables and functions */
int /*<<< orphan*/ printf(char *);
int /*<<< orphan*/ scanf(char *, int *);
int /*<<< orphan*/ sigqueue(int, int, union sigval);
int main(void) {
  union sigval a;
  a.sival_int = 100;
  pid_t pid;
  printf("pid: ");
  scanf("%d", &pid);
  printf("signal: ");
  int s;
  scanf("%d", &s);
  sigqueue(pid, s, a);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x64,-0x8(%rbp)
lea    0xeba(%rip),%rdi
call   1030 <printf@plt>
lea    0xeb4(%rip),%rdi
lea    -0xc(%rbp),%rsi
call   1050 <scanf@plt>
lea    0xea7(%rip),%rdi
call   1030 <printf@plt>
lea    0xe98(%rip),%rdi
lea    -0x10(%rbp),%rsi
call   1050 <scanf@plt>
mov    -0xc(%rbp),%edi
mov    -0x10(%rbp),%esi
mov    -0x8(%rbp),%edx
call   1040 <sigqueue@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xec4(%rip),%rdi
call   1030 <printf@plt>
lea    0xebe(%rip),%rbx
lea    0xc(%rsp),%rsi
mov    %rbx,%rdi
call   1050 <scanf@plt>
lea    0xead(%rip),%rdi
call   1030 <printf@plt>
lea    0x8(%rsp),%rsi
mov    %rbx,%rdi
call   1050 <scanf@plt>
mov    0xc(%rsp),%edi
mov    0x8(%rsp),%esi
mov    $0x64,%edx
call   1040 <sigqueue@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
%union.sigval = type { i32 }
@.str = [6 x i8] c"pid: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [9 x i8] c"signal: \00"
define i32 @main() {
%1 = alloca %union.sigval
%2 = alloca i32
%3 = alloca i32
%4 = bitcast %union.sigval* %1 to i32*
store i32 100, i32* %4
%5 = call i32 @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%7 = call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %3)
%9 = load i32, i32* %2
%10 = load i32, i32* %3
%11 = getelementptr inbounds %union.sigval, %union.sigval* %1, i32 0, i32 0
%12 = load i32, i32* %11
%13 = call i32 @sigqueue(i32 %9, i32 %10, i32 %12)
ret i32 0
}

LLVM IR (-O2):
@.str = [6 x i8] c"pid: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [9 x i8] c"signal: \00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = bitcast i32* %1 to i8*
%4 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0))
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%6 = call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0))
%7 = bitcast i32* %2 to i8*
%8 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%9 = load i32, i32* %1
%10 = load i32, i32* %2
%11 = call i32 @sigqueue(i32 %9, i32 %10, i32 100)
ret i32 0
}