#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*/ putchar(int);
int main(int argc, char *argv[]) {
  int c = 0;
  while ((c = getchar()) != EOF)
    switch (c) {
    case '\t':
      putchar('\\');
      putchar('t');
      break;
    case '\b':
      putchar('\\');
      putchar('b');
      break;
    case '\\':
      putchar('\\');
      putchar('\\');
      break;
    default:
      putchar(c);
    }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
movl   $0x0,-0x14(%rbp)
mov    $0x0,%al
call   1040 <getchar@plt>
mov    %eax,-0x14(%rbp)
mov    0x2e9a(%rip),%rcx
cmp    (%rcx),%eax
je     11e4 <main+0xc4>
mov    -0x14(%rbp),%eax
mov    %eax,-0x18(%rbp)
sub    $0x8,%eax
je     11a5 <main+0x85>
jmp    116a <main+0x4a>
mov    -0x18(%rbp),%eax
sub    $0x9,%eax
je     118c <main+0x6c>
jmp    117b <main+0x5b>
mov    -0x18(%rbp),%eax
sub    $0x5c,%eax
je     11be <main+0x9e>
jmp    11d7 <main+0xb7>
mov    $0x5c,%edi
call   1030 <putchar@plt>
mov    $0x74,%edi
call   1030 <putchar@plt>
jmp    11df <main+0xbf>
mov    $0x5c,%edi
call   1030 <putchar@plt>
mov    $0x62,%edi
call   1030 <putchar@plt>
jmp    11df <main+0xbf>
mov    $0x5c,%edi
call   1030 <putchar@plt>
mov    $0x5c,%edi
call   1030 <putchar@plt>
jmp    11df <main+0xbf>
mov    -0x14(%rbp),%edi
call   1030 <putchar@plt>
jmp    113d <main+0x1d>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
push   %rax
xor    %eax,%eax
call   1040 <getchar@plt>
mov    0x2eb6(%rip),%r14
cmp    (%r14),%eax
jne    1141 <main+0x21>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret
mov    %eax,%ebx
jmp    1174 <main+0x54>
cs nopw 0x0(%rax,%rax,1)
nop
mov    $0x74,%ebx
mov    $0x5c,%edi
call   1030 <putchar@plt>
mov    %ebx,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
call   1040 <getchar@plt>
mov    %eax,%ebx
cmp    (%r14),%eax
je     1137 <main+0x17>
cmp    $0x5c,%ebx
je     1190 <main+0x70>
cmp    $0x9,%ebx
je     1150 <main+0x30>
cmp    $0x8,%ebx
jne    115f <main+0x3f>
mov    $0x62,%ebx
jmp    1155 <main+0x35>
nopw   0x0(%rax,%rax,1)
mov    $0x5c,%ebx
jmp    1155 <main+0x35>

LLVM IR (-O0):
@EOF = global i32 0
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
store i32 0, i32* %6
br label %7
7: ; preds = %25, %2
%8 = call i32 (...) @getchar()
store i32 %8, i32* %6
%9 = load i32, i32* @EOF
%10 = icmp ne i32 %8, %9
br i1 %10, label %11, label %26
11: ; preds = %7
%12 = load i32, i32* %6
switch i32 %12, label %22 [
i32 9, label %13
i32 8, label %16
i32 92, label %19
]
13: ; preds = %11
%14 = call i32 @putchar(i32 92)
%15 = call i32 @putchar(i32 116)
br label %25
16: ; preds = %11
%17 = call i32 @putchar(i32 92)
%18 = call i32 @putchar(i32 98)
br label %25
19: ; preds = %11
%20 = call i32 @putchar(i32 92)
%21 = call i32 @putchar(i32 92)
br label %25
22: ; preds = %11
%23 = load i32, i32* %6
%24 = call i32 @putchar(i32 %23)
br label %25
25: ; preds = %22, %19, %16, %13
br label %7
26: ; preds = %7
ret i32 0
}

LLVM IR (-O2):
@EOF = global i32 0
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = tail call i32 (...) @getchar()
%4 = load i32, i32* @EOF
%5 = icmp eq i32 %3, %4
br i1 %5, label %19, label %6
6: ; preds = %2, %13
%7 = phi i32 [ %16, %13 ], [ %3, %2 ]
switch i32 %7, label %13 [
i32 9, label %10
i32 8, label %8
i32 92, label %9
]
8: ; preds = %6
br label %10
9: ; preds = %6
br label %10
10: ; preds = %6, %8, %9
%11 = phi i32 [ 98, %8 ], [ 92, %9 ], [ 116, %6 ]
%12 = tail call i32 @putchar(i32 92)
br label %13
13: ; preds = %10, %6
%14 = phi i32 [ %7, %6 ], [ %11, %10 ]
%15 = tail call i32 @putchar(i32 %14)
%16 = tail call i32 (...) @getchar()
%17 = load i32, i32* @EOF
%18 = icmp eq i32 %16, %17
br i1 %18, label %19, label %6
19: ; preds = %13, %2
ret i32 0
}