#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*/ SIGINT;
int /*<<< orphan*/ printf(char *);
int /*<<< orphan*/ signal(int /*<<< orphan*/, void (*)(int));
int /*<<< orphan*/ sleep(int);
main() {
  void f(int);
  int i;
  signal(SIGINT, f);
  for (i = 0; i < 5; i++) {
    printf("hello\n");
    sleep(1);
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    0x2ea2(%rip),%rax
mov    (%rax),%edi
mov    0x2e89(%rip),%rsi
call   1040 <signal@plt>
movl   $0x0,-0x8(%rbp)
cmpl   $0x5,-0x8(%rbp)
jge    1189 <main+0x59>
lea    0xe94(%rip),%rdi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    115b <main+0x2b>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
mov    0x2eb0(%rip),%rax
mov    (%rax),%edi
mov    0x2e97(%rip),%rsi
call   1040 <signal@plt>
lea    0xeb3(%rip),%rbx
mov    %rbx,%rdi
call   1030 <puts@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
call   1030 <puts@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
call   1030 <puts@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
call   1030 <puts@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
call   1030 <puts@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@SIGINT = global i32 0
@.str = [7 x i8] c"hello\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = load i32, i32* @SIGINT
%4 = call i32 @signal(i32 %3, void (i32)* @f)
store i32 0, i32* %2
br label %5
5: ; preds = %11, %0
%6 = load i32, i32* %2
%7 = icmp slt i32 %6, 5
br i1 %7, label %8, label %14
8: ; preds = %5
%9 = call i32 @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0))
%10 = call i32 @sleep(i32 1)
br label %11
11: ; preds = %8
%12 = load i32, i32* %2
%13 = add nsw i32 %12, 1
store i32 %13, i32* %2
br label %5
14: ; preds = %5
%15 = load i32, i32* %1
ret i32 %15
}

LLVM IR (-O2):
@SIGINT = global i32 0
@str = [6 x i8] c"hello\00"
define i32 @main() {
%1 = load i32, i32* @SIGINT
%2 = tail call i32 @signal(i32 %1, void (i32)* @f)
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @str, i64 0, i64 0))
%4 = tail call i32 @sleep(i32 1)
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @str, i64 0, i64 0))
%6 = tail call i32 @sleep(i32 1)
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @str, i64 0, i64 0))
%8 = tail call i32 @sleep(i32 1)
%9 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @str, i64 0, i64 0))
%10 = tail call i32 @sleep(i32 1)
%11 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @str, i64 0, i64 0))
%12 = tail call i32 @sleep(i32 1)
ret i32 0
}