#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);
int main() {
  int c;
  while ((c = getchar()) != EOF) {
    if (c == '\t')
      printf("\\t");
    if (c == '\\')
      printf("\\\\");
    if (c != '\t' && 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     11a5 <main+0x75>
cmpl   $0x9,-0x8(%rbp)
jne    116e <main+0x3e>
lea    0xe97(%rip),%rdi
call   1040 <printf@plt>
cmpl   $0x5c,-0x8(%rbp)
jne    1184 <main+0x54>
lea    0xe84(%rip),%rdi
call   1040 <printf@plt>
cmpl   $0x9,-0x8(%rbp)
je     11a0 <main+0x70>
cmpl   $0x5c,-0x8(%rbp)
je     11a0 <main+0x70>
mov    -0x8(%rbp),%edi
call   1030 <putchar@plt>
jmp    113f <main+0xf>
mov    -0x4(%rbp),%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),%eax
jne    114f <main+0x1f>
xor    %eax,%eax
pop    %rbx
pop    %r14
pop    %r15
ret
lea    0xead(%rip),%r14
lea    0xea3(%rip),%r15
jmp    1172 <main+0x42>
nop
mov    %eax,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
call   1050 <getchar@plt>
cmp    (%rbx),%eax
je     1147 <main+0x17>
cmp    $0x5c,%eax
je     1190 <main+0x60>
cmp    $0x9,%eax
jne    1160 <main+0x30>
mov    %r15,%rdi
call   1040 <printf@plt>
jmp    1167 <main+0x37>
cs nopw 0x0(%rax,%rax,1)
mov    %r14,%rdi
call   1040 <printf@plt>
jmp    1167 <main+0x37>

LLVM IR (-O0):
@EOF = global i32 0
@.str = [3 x i8] c"\\t\00"
@.str.1 = [3 x i8] c"\\\\\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
br label %3
3: ; preds = %26, %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 %27
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, 92
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 ne i32 %18, 9
br i1 %19, label %20, label %26
20: ; preds = %17
%21 = load i32, i32* %2
%22 = icmp ne i32 %21, 92
br i1 %22, label %23, label %26
23: ; preds = %20
%24 = load i32, i32* %2
%25 = call i32 @putchar(i32 %24)
br label %26
26: ; preds = %23, %20, %17
br label %3
27: ; preds = %3
%28 = load i32, i32* %1
ret i32 %28
}

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