#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*/ pay_amount(int, int *, int *, int *, int *);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
int main(void) {
  int dollars, twenties, tens, fives, ones;
  printf("enter a dollar amount:\n");
  scanf("%d", &dollars);
  pay_amount(dollars, &twenties, &tens, &fives, &ones);
  printf("$20 bills: %d\n$10 bills: %d\n $5 bills: %d\n $1 bills: %d\n",
         twenties, tens, fives, ones);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xec4(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1050 <scanf@plt>
mov    -0x8(%rbp),%edi
lea    -0xc(%rbp),%rsi
lea    -0x10(%rbp),%rdx
lea    -0x14(%rbp),%rcx
lea    -0x18(%rbp),%r8
call   1030 <pay_amount@plt>
mov    -0xc(%rbp),%esi
mov    -0x10(%rbp),%edx
mov    -0x14(%rbp),%ecx
mov    -0x18(%rbp),%r8d
lea    0xe92(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
sub    $0x18,%rsp
lea    0xef1(%rip),%rdi
call   1040 <puts@plt>
lea    0xea9(%rip),%rdi
lea    0x14(%rsp),%rsi
call   1060 <scanf@plt>
mov    0x14(%rsp),%edi
lea    0x10(%rsp),%rsi
lea    0xc(%rsp),%rdx
lea    0x8(%rsp),%rcx
lea    0x4(%rsp),%r8
call   1030 <pay_amount@plt>
mov    0x10(%rsp),%esi
mov    0xc(%rsp),%edx
mov    0x8(%rsp),%ecx
mov    0x4(%rsp),%r8d
lea    0xe6d(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
xor    %eax,%eax
add    $0x18,%rsp
ret

LLVM IR (-O0):
@.str = [24 x i8] c"enter a dollar amount:\0A\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [57 x i8] c"$20 bills: %d\0A$10 bills: %d\0A $5 bills: %d\0A $1 bills: %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
%6 = alloca i32
store i32 0, i32* %1
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str, i64 0, i64 0))
%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* %2
%10 = call i32 @pay_amount(i32 %9, i32* %3, i32* %4, i32* %5, i32* %6)
%11 = load i32, i32* %3
%12 = load i32, i32* %4
%13 = load i32, i32* %5
%14 = load i32, i32* %6
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([57 x i8], [57 x i8]* @.str.2, i64 0, i64 0), i32 %11, i32 %12, i32 %13, i32 %14)
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [57 x i8] c"$20 bills: %d\0A$10 bills: %d\0A $5 bills: %d\0A $1 bills: %d\0A\00"
@str = [23 x i8] c"enter a dollar amount:\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
%6 = bitcast i32* %1 to i8*
%7 = bitcast i32* %2 to i8*
%8 = bitcast i32* %3 to i8*
%9 = bitcast i32* %4 to i8*
%10 = bitcast i32* %5 to i8*
%11 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([23 x i8], [23 x i8]* @str, i64 0, i64 0))
%12 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%13 = load i32, i32* %1
%14 = call i32 @pay_amount(i32 %13, i32* %2, i32* %3, i32* %4, i32* %5)
%15 = load i32, i32* %2
%16 = load i32, i32* %3
%17 = load i32, i32* %4
%18 = load i32, i32* %5
%19 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([57 x i8], [57 x i8]* @.str.2, i64 0, i64 0), i32 %15, i32 %16, i32 %17, i32 %18)
ret i32 0
}