#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 *, char *);
int main() {
  char orig;
  int code, accum;
  char checksum;
  printf("Enter an abitrarily long string, ending with carriage return > ");
  accum = 0;
  checksum = 0;
  code = 0;
  orig = ' ';
  do {
    scanf("%c", &orig);
    code = (int)orig;
    accum += code;
  } while (orig != '\n');
  checksum = (char)((accum % 64) + 22);
  printf("Check sum is %c\n", checksum);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x10(%rbp)
movb   $0x0,-0x11(%rbp)
movl   $0x0,-0xc(%rbp)
movb   $0x20,-0x5(%rbp)
lea    0xee6(%rip),%rdi
lea    -0x5(%rbp),%rsi
call   1040 <scanf@plt>
movsbl -0x5(%rbp),%eax
mov    %eax,-0xc(%rbp)
mov    -0xc(%rbp),%eax
add    -0x10(%rbp),%eax
mov    %eax,-0x10(%rbp)
movsbl -0x5(%rbp),%eax
cmp    $0xa,%eax
jne    1153 <main+0x33>
mov    -0x10(%rbp),%eax
mov    $0x40,%ecx
cltd
idiv   %ecx
add    $0x16,%edx
mov    %dl,%al
mov    %al,-0x11(%rbp)
movsbl -0x11(%rbp),%esi
lea    0xea5(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
lea    0xed0(%rip),%rdi
xor    %ebx,%ebx
xor    %eax,%eax
call   1030 <printf@plt>
movb   $0x20,0xf(%rsp)
lea    0xefb(%rip),%r14
lea    0xf(%rsp),%r15
nopw   0x0(%rax,%rax,1)
mov    %r14,%rdi
mov    %r15,%rsi
call   1040 <scanf@plt>
movsbl 0xf(%rsp),%eax
add    %eax,%ebx
cmp    $0xa,%eax
jne    1150 <main+0x30>
lea    0x3f(%rbx),%eax
test   %ebx,%ebx
cmovns %ebx,%eax
and    $0xffffffc0,%eax
neg    %eax
lea    (%rbx,%rax,1),%esi
add    $0x16,%esi
lea    0xec2(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [64 x i8] c"Enter an abitrarily long string, ending with carriage return > \00"
@.str.1 = [3 x i8] c"%c\00"
@.str.2 = [17 x i8] c"Check sum is %c\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i8
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8
store i32 0, i32* %1
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([64 x i8], [64 x i8]* @.str, i64 0, i64 0))
store i32 0, i32* %4
store i8 0, i8* %5
store i32 0, i32* %3
store i8 32, i8* %2
br label %7
7: ; preds = %14, %0
%8 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8* %2)
%9 = load i8, i8* %2
%10 = sext i8 %9 to i32
store i32 %10, i32* %3
%11 = load i32, i32* %3
%12 = load i32, i32* %4
%13 = add nsw i32 %12, %11
store i32 %13, i32* %4
br label %14
14: ; preds = %7
%15 = load i8, i8* %2
%16 = sext i8 %15 to i32
%17 = icmp ne i32 %16, 10
br i1 %17, label %7, label %18
18: ; preds = %14
%19 = load i32, i32* %4
%20 = srem i32 %19, 64
%21 = add nsw i32 %20, 22
%22 = trunc i32 %21 to i8
store i8 %22, i8* %5
%23 = load i8, i8* %5
%24 = sext i8 %23 to i32
%25 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %24)
ret i32 0
}

LLVM IR (-O2):
@.str = [64 x i8] c"Enter an abitrarily long string, ending with carriage return > \00"
@.str.1 = [3 x i8] c"%c\00"
@.str.2 = [17 x i8] c"Check sum is %c\0A\00"
define i32 @main() {
%1 = alloca i8
%2 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([64 x i8], [64 x i8]* @.str, i64 0, i64 0))
store i8 32, i8* %1
br label %3
3: ; preds = %3, %0
%4 = phi i32 [ 0, %0 ], [ %8, %3 ]
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8* %1)
%6 = load i8, i8* %1
%7 = sext i8 %6 to i32
%8 = add nsw i32 %4, %7
%9 = icmp eq i8 %6, 10
br i1 %9, label %10, label %3
10: ; preds = %3
%11 = srem i32 %8, 64
%12 = add nsw i32 %11, 22
%13 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %12)
ret i32 0
}