#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 strlen(char *);
void removeSpecialCar(char *buffer) {
  int size = strlen(buffer);
  while (size > 0) {
    if (buffer[size - 1] == '\n' || buffer[size - 1] == '\r') {
      buffer[size - 1] = '\0';
    } else {
      break;
    }
    size--;
  }
}


x86 assembly (clang, -O0):
<removeSpecialCar>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rdi
call   1030 <strlen@plt>
mov    %eax,-0xc(%rbp)
cmpl   $0x0,-0xc(%rbp)
jle    118f <removeSpecialCar+0x7f>
mov    -0x8(%rbp),%rax
mov    -0xc(%rbp),%ecx
sub    $0x1,%ecx
movslq %ecx,%rcx
movsbl (%rax,%rcx,1),%eax
cmp    $0xa,%eax
je     1166 <removeSpecialCar+0x56>
mov    -0x8(%rbp),%rax
mov    -0xc(%rbp),%ecx
sub    $0x1,%ecx
movslq %ecx,%rcx
movsbl (%rax,%rcx,1),%eax
cmp    $0xd,%eax
jne    117c <removeSpecialCar+0x6c>
mov    -0x8(%rbp),%rax
mov    -0xc(%rbp),%ecx
sub    $0x1,%ecx
movslq %ecx,%rcx
movb   $0x0,(%rax,%rcx,1)
jmp    1181 <removeSpecialCar+0x71>
jmp    118f <removeSpecialCar+0x7f>
mov    -0xc(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,-0xc(%rbp)
jmp    1128 <removeSpecialCar+0x18>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<removeSpecialCar>:
push   %rbx
mov    %rdi,%rbx
call   1030 <strlen@plt>
test   %eax,%eax
jle    114f <removeSpecialCar+0x3f>
mov    %eax,%eax
add    $0x1,%rax
jmp    113e <removeSpecialCar+0x2e>
cs nopw 0x0(%rax,%rax,1)
nop
movb   $0x0,(%rbx,%rcx,1)
add    $0xffffffffffffffff,%rax
cmp    $0x1,%rax
jbe    114f <removeSpecialCar+0x3f>
lea    -0x2(%rax),%ecx
movzbl (%rbx,%rcx,1),%edx
cmp    $0xd,%dl
je     1130 <removeSpecialCar+0x20>
cmp    $0xa,%dl
je     1130 <removeSpecialCar+0x20>
pop    %rbx
ret

LLVM IR (-O0):
define void @removeSpecialCar(i8* %0) {
%2 = alloca i8*
%3 = alloca i32
store i8* %0, i8** %2
%4 = load i8*, i8** %2
%5 = call i32 @strlen(i8* %4)
store i32 %5, i32* %3
br label %6
6: ; preds = %34, %1
%7 = load i32, i32* %3
%8 = icmp sgt i32 %7, 0
br i1 %8, label %9, label %37
9: ; preds = %6
%10 = load i8*, i8** %2
%11 = load i32, i32* %3
%12 = sub nsw i32 %11, 1
%13 = sext i32 %12 to i64
%14 = getelementptr inbounds i8, i8* %10, i64 %13
%15 = load i8, i8* %14
%16 = sext i8 %15 to i32
%17 = icmp eq i32 %16, 10
br i1 %17, label %27, label %18
18: ; preds = %9
%19 = load i8*, i8** %2
%20 = load i32, i32* %3
%21 = sub nsw i32 %20, 1
%22 = sext i32 %21 to i64
%23 = getelementptr inbounds i8, i8* %19, i64 %22
%24 = load i8, i8* %23
%25 = sext i8 %24 to i32
%26 = icmp eq i32 %25, 13
br i1 %26, label %27, label %33
27: ; preds = %18, %9
%28 = load i8*, i8** %2
%29 = load i32, i32* %3
%30 = sub nsw i32 %29, 1
%31 = sext i32 %30 to i64
%32 = getelementptr inbounds i8, i8* %28, i64 %31
store i8 0, i8* %32
br label %34
33: ; preds = %18
br label %37
34: ; preds = %27
%35 = load i32, i32* %3
%36 = add nsw i32 %35, -1
store i32 %36, i32* %3
br label %6
37: ; preds = %33, %6
ret void
}

LLVM IR (-O2):
define void @removeSpecialCar(i8* %0) {
%2 = tail call i32 @strlen(i8* %0)
%3 = icmp sgt i32 %2, 0
br i1 %3, label %4, label %14
4: ; preds = %1
%5 = zext i32 %2 to i64
br label %6
6: ; preds = %4, %12
%7 = phi i64 [ %5, %4 ], [ %8, %12 ]
%8 = add nsw i64 %7, -1
%9 = and i64 %8, 4294967295
%10 = getelementptr inbounds i8, i8* %0, i64 %9
%11 = load i8, i8* %10
switch i8 %11, label %14 [
i8 10, label %12
i8 13, label %12
]
12: ; preds = %6, %6
store i8 0, i8* %10
%13 = icmp ugt i64 %7, 1
br i1 %13, label %6, label %14
14: ; preds = %12, %6, %1
ret void
}