#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 */
char EOF;
char getchar();
int /*<<< orphan*/ printf(char *, ...);
int main() {
  char c = '\0';
  while ((c = getchar()) != EOF) {
    if (c == '\t') {
      printf("\\t");
      continue;
    } else if (c == '\b') {
      printf("\\b");
      continue;
    } else if (c == '\\') {
      printf("\\");
      continue;
    }
    printf("%c", c);
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movb   $0x0,-0x5(%rbp)
mov    $0x0,%al
call   1040 <getchar@plt>
mov    %al,-0x5(%rbp)
movsbl %al,%eax
mov    0x2ea1(%rip),%rcx
movsbl (%rcx),%ecx
cmp    %ecx,%eax
je     11d3 <main+0xb3>
movsbl -0x5(%rbp),%eax
cmp    $0x9,%eax
jne    1172 <main+0x52>
lea    0xe9a(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1133 <main+0x13>
movsbl -0x5(%rbp),%eax
cmp    $0x8,%eax
jne    1192 <main+0x72>
lea    0xe7d(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1133 <main+0x13>
movsbl -0x5(%rbp),%eax
cmp    $0x5c,%eax
jne    11b2 <main+0x92>
lea    0xe60(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1133 <main+0x13>
jmp    11b7 <main+0x97>
jmp    11bc <main+0x9c>
movsbl -0x5(%rbp),%esi
lea    0xe41(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1133 <main+0x13>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
xor    %eax,%eax
call   1050 <getchar@plt>
mov    0x2ea5(%rip),%rbx
cmp    (%rbx),%al
jne    114f <main+0x1f>
xor    %eax,%eax
pop    %rbx
pop    %r14
pop    %r15
ret
lea    0xead(%rip),%r14
lea    0xea3(%rip),%r15
jmp    1175 <main+0x45>
nop
mov    %r15,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
call   1050 <getchar@plt>
cmp    (%rbx),%al
je     1147 <main+0x17>
cmp    $0x8,%al
je     11a0 <main+0x70>
cmp    $0x5c,%al
je     1190 <main+0x60>
cmp    $0x9,%al
je     1160 <main+0x30>
movsbl %al,%edi
call   1030 <putchar@plt>
jmp    116a <main+0x3a>
nopl   0x0(%rax,%rax,1)
mov    $0x5c,%edi
call   1030 <putchar@plt>
jmp    116a <main+0x3a>
nopl   0x0(%rax)
mov    %r14,%rdi
jmp    1163 <main+0x33>

LLVM IR (-O0):
@EOF = global i8 0
@.str = [3 x i8] c"\\t\00"
@.str.1 = [3 x i8] c"\\b\00"
@.str.2 = [2 x i8] c"\\\00"
@.str.3 = [3 x i8] c"%c\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i8
store i32 0, i32* %1
store i8 0, i8* %2
br label %3
3: ; preds = %29, %25, %19, %13, %0
%4 = call signext i8 (...) @getchar()
store i8 %4, i8* %2
%5 = sext i8 %4 to i32
%6 = load i8, i8* @EOF
%7 = sext i8 %6 to i32
%8 = icmp ne i32 %5, %7
br i1 %8, label %9, label %33
9: ; preds = %3
%10 = load i8, i8* %2
%11 = sext i8 %10 to i32
%12 = icmp eq i32 %11, 9
br i1 %12, label %13, label %15
13: ; preds = %9
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
br label %3
15: ; preds = %9
%16 = load i8, i8* %2
%17 = sext i8 %16 to i32
%18 = icmp eq i32 %17, 8
br i1 %18, label %19, label %21
19: ; preds = %15
%20 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
br label %3
21: ; preds = %15
%22 = load i8, i8* %2
%23 = sext i8 %22 to i32
%24 = icmp eq i32 %23, 92
br i1 %24, label %25, label %27
25: ; preds = %21
%26 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
br label %3
27: ; preds = %21
br label %28
28: ; preds = %27
br label %29
29: ; preds = %28
%30 = load i8, i8* %2
%31 = sext i8 %30 to i32
%32 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i32 %31)
br label %3
33: ; preds = %3
ret i32 0
}

LLVM IR (-O2):
@EOF = global i8 0
@.str = [3 x i8] c"\\t\00"
@.str.1 = [3 x i8] c"\\b\00"
define i32 @main() {
%1 = tail call signext i8 (...) @getchar()
%2 = load i8, i8* @EOF
%3 = icmp eq i8 %1, %2
br i1 %3, label %19, label %4
4: ; preds = %0, %8
%5 = phi i8 [ %9, %8 ], [ %1, %0 ]
switch i8 %5, label %16 [
i8 9, label %6
i8 8, label %12
i8 92, label %14
]
6: ; preds = %4
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
br label %8
8: ; preds = %6, %12, %14, %16
%9 = tail call signext i8 (...) @getchar()
%10 = load i8, i8* @EOF
%11 = icmp eq i8 %9, %10
br i1 %11, label %19, label %4
12: ; preds = %4
%13 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
br label %8
14: ; preds = %4
%15 = tail call i32 @putchar(i32 92)
br label %8
16: ; preds = %4
%17 = sext i8 %5 to i32
%18 = tail call i32 @putchar(i32 %17)
br label %8
19: ; preds = %8, %0
ret i32 0
}