#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*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
int productlast() {
  int i, z, rem, k, n, m, p = 0, q, f;
  printf("Enter the number");
  scanf("%d", &i);
  z = i;
  n = i;
  rem = z % 10;
  while (n != 0) {
    m = n % 10;
    p = p * 10 + m;
    n = n / 10;
  }
  q = p % 10;
  f = rem * q;
  printf("the answer is %d", f);
}


x86 assembly (clang, -O0):
<productlast>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x20(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xedb(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x8(%rbp),%eax
mov    %eax,-0xc(%rbp)
mov    -0x8(%rbp),%eax
mov    %eax,-0x18(%rbp)
mov    -0xc(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %edx,-0x10(%rbp)
cmpl   $0x0,-0x18(%rbp)
je     119c <productlast+0x7c>
mov    -0x18(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %edx,-0x1c(%rbp)
imul   $0xa,-0x20(%rbp),%eax
add    -0x1c(%rbp),%eax
mov    %eax,-0x20(%rbp)
mov    -0x18(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %eax,-0x18(%rbp)
jmp    1167 <productlast+0x47>
mov    -0x20(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %edx,-0x24(%rbp)
mov    -0x10(%rbp),%eax
imul   -0x24(%rbp),%eax
mov    %eax,-0x28(%rbp)
mov    -0x28(%rbp),%esi
lea    0xe53(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x4(%rbp),%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<productlast>:
push   %rbx
sub    $0x10,%rsp
lea    0xed4(%rip),%rdi
xor    %ebx,%ebx
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xee3(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1040 <scanf@plt>
mov    0xc(%rsp),%esi
test   %esi,%esi
je     11ad <productlast+0x8d>
xor    %ecx,%ecx
mov    %esi,%eax
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
lea    (%rcx,%rcx,4),%ecx
movslq %eax,%rbx
imul   $0x66666667,%rbx,%rax
mov    %rax,%rdi
shr    $0x3f,%rdi
sar    $0x22,%rax
add    %edi,%eax
lea    (%rax,%rax,1),%edi
lea    (%rdi,%rdi,4),%edi
mov    %ebx,%edx
sub    %edi,%edx
lea    (%rdx,%rcx,2),%ecx
add    $0x9,%ebx
cmp    $0x12,%ebx
ja     1160 <productlast+0x40>
movslq %ecx,%rbx
imul   $0x66666667,%rbx,%rax
mov    %rax,%rcx
shr    $0x3f,%rcx
sar    $0x22,%rax
add    %ecx,%eax
add    %eax,%eax
lea    (%rax,%rax,4),%eax
sub    %eax,%ebx
movslq %esi,%rax
imul   $0x66666667,%rax,%rax
mov    %rax,%rcx
shr    $0x3f,%rcx
sar    $0x22,%rax
add    %ecx,%eax
add    %eax,%eax
lea    (%rax,%rax,4),%eax
sub    %eax,%esi
imul   %ebx,%esi
lea    0xe3c(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [17 x i8] c"Enter the number\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [17 x i8] c"the answer is %d\00"
define i32 @productlast() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
%6 = alloca i32
%7 = alloca i32
%8 = alloca i32
%9 = alloca i32
%10 = alloca i32
store i32 0, i32* %8
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 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* %2)
%13 = load i32, i32* %2
store i32 %13, i32* %3
%14 = load i32, i32* %2
store i32 %14, i32* %6
%15 = load i32, i32* %3
%16 = srem i32 %15, 10
store i32 %16, i32* %4
br label %17
17: ; preds = %20, %0
%18 = load i32, i32* %6
%19 = icmp ne i32 %18, 0
br i1 %19, label %20, label %29
20: ; preds = %17
%21 = load i32, i32* %6
%22 = srem i32 %21, 10
store i32 %22, i32* %7
%23 = load i32, i32* %8
%24 = mul nsw i32 %23, 10
%25 = load i32, i32* %7
%26 = add nsw i32 %24, %25
store i32 %26, i32* %8
%27 = load i32, i32* %6
%28 = sdiv i32 %27, 10
store i32 %28, i32* %6
br label %17
29: ; preds = %17
%30 = load i32, i32* %8
%31 = srem i32 %30, 10
store i32 %31, i32* %9
%32 = load i32, i32* %4
%33 = load i32, i32* %9
%34 = mul nsw i32 %32, %33
store i32 %34, i32* %10
%35 = load i32, i32* %10
%36 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %35)
%37 = load i32, i32* %1
ret i32 %37
}

LLVM IR (-O2):
@.str = [17 x i8] c"Enter the number\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [17 x i8] c"the answer is %d\00"
define i32 @productlast() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%5 = load i32, i32* %1
%6 = icmp eq i32 %5, 0
br i1 %6, label %18, label %7
7: ; preds = %0, %7
%8 = phi i32 [ %13, %7 ], [ %5, %0 ]
%9 = phi i32 [ %12, %7 ], [ 0, %0 ]
%10 = srem i32 %8, 10
%11 = mul nsw i32 %9, 10
%12 = add nsw i32 %10, %11
%13 = sdiv i32 %8, 10
%14 = add i32 %8, 9
%15 = icmp ult i32 %14, 19
br i1 %15, label %16, label %7
16: ; preds = %7
%17 = srem i32 %12, 10
br label %18
18: ; preds = %16, %0
%19 = phi i32 [ 0, %0 ], [ %17, %16 ]
%20 = srem i32 %5, 10
%21 = mul nsw i32 %19, %20
%22 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %21)
ret i32 undef
}