#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);
int /*<<< orphan*/ puts(char *);
int /*<<< orphan*/ scanf(char *, int *);
int main() {
  int decks;
  puts("Enter the number of decks: ");
  scanf("%i", &decks);
  if (decks < 1) {
    puts("Not a valid number of decks");
    return 1;
  }
  printf("There are %i cards in the deck.\n", (decks * 52));
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
call   1030 <puts@plt>
lea    0xeca(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1050 <scanf@plt>
cmpl   $0x1,-0x8(%rbp)
jge    117d <main+0x4d>
lea    0xeb3(%rip),%rdi
call   1030 <puts@plt>
movl   $0x1,-0x4(%rbp)
jmp    1194 <main+0x64>
imul   $0x34,-0x8(%rbp),%esi
lea    0xeb3(%rip),%rdi
call   1040 <printf@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xec8(%rip),%rdi
call   1030 <puts@plt>
lea    0xed8(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1050 <scanf@plt>
mov    0x4(%rsp),%eax
test   %eax,%eax
jle    1169 <main+0x39>
imul   $0x34,%eax,%esi
lea    0xedb(%rip),%rdi
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret
lea    0xeaf(%rip),%rdi
call   1030 <puts@plt>
mov    $0x1,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [28 x i8] c"Enter the number of decks: \00"
@.str.1 = [3 x i8] c"%i\00"
@.str.2 = [28 x i8] c"Not a valid number of decks\00"
@.str.3 = [33 x i8] c"There are %i cards in the deck.\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = call i32 @puts(i8* getelementptr inbounds ([28 x i8], [28 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* %2)
%5 = load i32, i32* %2
%6 = icmp slt i32 %5, 1
br i1 %6, label %7, label %9
7: ; preds = %0
%8 = call i32 @puts(i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.2, i64 0, i64 0))
store i32 1, i32* %1
br label %13
9: ; preds = %0
%10 = load i32, i32* %2
%11 = mul nsw i32 %10, 52
%12 = call i32 @printf(i8* getelementptr inbounds ([33 x i8], [33 x i8]* @.str.3, i64 0, i64 0), i32 %11)
store i32 0, i32* %1
br label %13
13: ; preds = %9, %7
%14 = load i32, i32* %1
ret i32 %14
}

LLVM IR (-O2):
@.str = [28 x i8] c"Enter the number of decks: \00"
@.str.1 = [3 x i8] c"%i\00"
@.str.2 = [28 x i8] c"Not a valid number of decks\00"
@.str.3 = [33 x i8] c"There are %i cards in the deck.\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([28 x i8], [28 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 slt i32 %5, 1
br i1 %6, label %7, label %9
7: ; preds = %0
%8 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([28 x i8], [28 x i8]* @.str.2, i64 0, i64 0))
br label %12
9: ; preds = %0
%10 = mul nsw i32 %5, 52
%11 = call i32 @printf(i8* getelementptr inbounds ([33 x i8], [33 x i8]* @.str.3, i64 0, i64 0), i32 %10)
br label %12
12: ; preds = %9, %7
%13 = phi i32 [ 1, %7 ], [ 0, %9 ]
ret i32 %13
}