#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 EOF;
int getchar();
int /*<<< orphan*/ printf(char *);
int /*<<< orphan*/ putchar(int);
main() {
  int c;
  while ((c = getchar()) != EOF) {
    if (c == '\t')
      printf("\\t");
    if (c == '\b')
      printf("\\b");
    if (c == '\\')
      printf("\\\\");
    if (c != '\t')
      if (c != '\b')
        if (c != '\\')
          putchar(c);
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    $0x0,%al
call   1050 <getchar@plt>
mov    %eax,-0x8(%rbp)
mov    0x2e98(%rip),%rcx
cmp    (%rcx),%eax
je     11cf <main+0x9f>
cmpl   $0x9,-0x8(%rbp)
jne    116e <main+0x3e>
lea    0xe97(%rip),%rdi
call   1040 <printf@plt>
cmpl   $0x8,-0x8(%rbp)
jne    1184 <main+0x54>
lea    0xe84(%rip),%rdi
call   1040 <printf@plt>
cmpl   $0x5c,-0x8(%rbp)
jne    119a <main+0x6a>
lea    0xe71(%rip),%rdi
call   1040 <printf@plt>
cmpl   $0x9,-0x8(%rbp)
je     11ca <main+0x9a>
cmpl   $0x8,-0x8(%rbp)
je     11c5 <main+0x95>
cmpl   $0x5c,-0x8(%rbp)
je     11c0 <main+0x90>
mov    -0x8(%rbp),%edi
call   1030 <putchar@plt>
jmp    11c5 <main+0x95>
jmp    11ca <main+0x9a>
jmp    113f <main+0xf>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
xor    %eax,%eax
call   1050 <getchar@plt>
mov    0x2ea2(%rip),%rbx
cmp    (%rbx),%eax
jne    1158 <main+0x28>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret
lea    0xea4(%rip),%r14
lea    0xea0(%rip),%r12
lea    0xe93(%rip),%r15
jmp    1183 <main+0x53>
nop
mov    %r12,%rdi
call   1040 <printf@plt>
xor    %eax,%eax
call   1050 <getchar@plt>
cmp    (%rbx),%eax
je     114a <main+0x1a>
cmp    $0x8,%eax
je     11a0 <main+0x70>
cmp    $0x5c,%eax
je     1170 <main+0x40>
cmp    $0x9,%eax
jne    11b0 <main+0x80>
mov    %r15,%rdi
jmp    1173 <main+0x43>
nopw   0x0(%rax,%rax,1)
mov    %r14,%rdi
jmp    1173 <main+0x43>
cs nopw 0x0(%rax,%rax,1)
nop
mov    %eax,%edi
call   1030 <putchar@plt>
jmp    1178 <main+0x48>

LLVM IR (-O0):
@EOF = global i32 0
@.str = [3 x i8] c"\\t\00"
@.str.1 = [3 x i8] c"\\b\00"
@.str.2 = [3 x i8] c"\\\\\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
br label %3
3: ; preds = %36, %0
%4 = call i32 (...) @getchar()
store i32 %4, i32* %2
%5 = load i32, i32* @EOF
%6 = icmp ne i32 %4, %5
br i1 %6, label %7, label %37
7: ; preds = %3
%8 = load i32, i32* %2
%9 = icmp eq i32 %8, 9
br i1 %9, label %10, label %12
10: ; preds = %7
%11 = call i32 @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
br label %12
12: ; preds = %10, %7
%13 = load i32, i32* %2
%14 = icmp eq i32 %13, 8
br i1 %14, label %15, label %17
15: ; preds = %12
%16 = call i32 @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
br label %17
17: ; preds = %15, %12
%18 = load i32, i32* %2
%19 = icmp eq i32 %18, 92
br i1 %19, label %20, label %22
20: ; preds = %17
%21 = call i32 @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0))
br label %22
22: ; preds = %20, %17
%23 = load i32, i32* %2
%24 = icmp ne i32 %23, 9
br i1 %24, label %25, label %36
25: ; preds = %22
%26 = load i32, i32* %2
%27 = icmp ne i32 %26, 8
br i1 %27, label %28, label %35
28: ; preds = %25
%29 = load i32, i32* %2
%30 = icmp ne i32 %29, 92
br i1 %30, label %31, label %34
31: ; preds = %28
%32 = load i32, i32* %2
%33 = call i32 @putchar(i32 %32)
br label %34
34: ; preds = %31, %28
br label %35
35: ; preds = %34, %25
br label %36
36: ; preds = %35, %22
br label %3
37: ; preds = %3
%38 = load i32, i32* %1
ret i32 %38
}

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