#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 tailstrip(char *s) {
  int i, n = strlen(s);
  for (i = n - 1; i > 0; i--) {
    if (s[i] == '\n' || s[i] == '\r' || s[i] == ' ') {
      s[i] = '\0';
    } else {
      break;
    }
  }
}


x86 assembly (clang, -O0):
<tailstrip>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rdi
call   1030 <strlen@plt>
mov    %eax,-0x10(%rbp)
mov    -0x10(%rbp),%eax
sub    $0x1,%eax
mov    %eax,-0xc(%rbp)
cmpl   $0x0,-0xc(%rbp)
jle    11a3 <tailstrip+0x93>
mov    -0x8(%rbp),%rax
movslq -0xc(%rbp),%rcx
movsbl (%rax,%rcx,1),%eax
cmp    $0xa,%eax
je     117a <tailstrip+0x6a>
mov    -0x8(%rbp),%rax
movslq -0xc(%rbp),%rcx
movsbl (%rax,%rcx,1),%eax
cmp    $0xd,%eax
je     117a <tailstrip+0x6a>
mov    -0x8(%rbp),%rax
movslq -0xc(%rbp),%rcx
movsbl (%rax,%rcx,1),%eax
cmp    $0x20,%eax
jne    118b <tailstrip+0x7b>
mov    -0x8(%rbp),%rax
movslq -0xc(%rbp),%rcx
movb   $0x0,(%rax,%rcx,1)
jmp    1190 <tailstrip+0x80>
jmp    11a3 <tailstrip+0x93>
jmp    1195 <tailstrip+0x85>
mov    -0xc(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,-0xc(%rbp)
jmp    1131 <tailstrip+0x21>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<tailstrip>:
push   %rbx
mov    %rdi,%rbx
call   1030 <strlen@plt>
cmp    $0x2,%eax
jl     1151 <tailstrip+0x41>
mov    %eax,%eax
add    $0x1,%rax
movabs $0x100002400,%rcx
xchg   %ax,%ax
lea    -0x2(%rax),%edx
movzbl (%rbx,%rdx,1),%esi
cmp    $0x20,%rsi
ja     1151 <tailstrip+0x41>
bt     %rsi,%rcx
jae    1151 <tailstrip+0x41>
movb   $0x0,(%rbx,%rdx,1)
add    $0xffffffffffffffff,%rax
cmp    $0x2,%rax
ja     1130 <tailstrip+0x20>
pop    %rbx
ret

LLVM IR (-O0):
define void @tailstrip(i8* %0) {
%2 = alloca i8*
%3 = alloca i32
%4 = alloca i32
store i8* %0, i8** %2
%5 = load i8*, i8** %2
%6 = call i32 @strlen(i8* %5)
store i32 %6, i32* %4
%7 = load i32, i32* %4
%8 = sub nsw i32 %7, 1
store i32 %8, i32* %3
br label %9
9: ; preds = %43, %1
%10 = load i32, i32* %3
%11 = icmp sgt i32 %10, 0
br i1 %11, label %12, label %46
12: ; preds = %9
%13 = load i8*, i8** %2
%14 = load i32, i32* %3
%15 = sext i32 %14 to i64
%16 = getelementptr inbounds i8, i8* %13, i64 %15
%17 = load i8, i8* %16
%18 = sext i8 %17 to i32
%19 = icmp eq i32 %18, 10
br i1 %19, label %36, label %20
20: ; preds = %12
%21 = load i8*, i8** %2
%22 = load i32, i32* %3
%23 = sext i32 %22 to i64
%24 = getelementptr inbounds i8, i8* %21, i64 %23
%25 = load i8, i8* %24
%26 = sext i8 %25 to i32
%27 = icmp eq i32 %26, 13
br i1 %27, label %36, label %28
28: ; preds = %20
%29 = load i8*, i8** %2
%30 = load i32, i32* %3
%31 = sext i32 %30 to i64
%32 = getelementptr inbounds i8, i8* %29, i64 %31
%33 = load i8, i8* %32
%34 = sext i8 %33 to i32
%35 = icmp eq i32 %34, 32
br i1 %35, label %36, label %41
36: ; preds = %28, %20, %12
%37 = load i8*, i8** %2
%38 = load i32, i32* %3
%39 = sext i32 %38 to i64
%40 = getelementptr inbounds i8, i8* %37, i64 %39
store i8 0, i8* %40
br label %42
41: ; preds = %28
br label %46
42: ; preds = %36
br label %43
43: ; preds = %42
%44 = load i32, i32* %3
%45 = add nsw i32 %44, -1
store i32 %45, i32* %3
br label %9
46: ; preds = %41, %9
ret void
}

LLVM IR (-O2):
define void @tailstrip(i8* %0) {
%2 = tail call i32 @strlen(i8* %0)
%3 = icmp sgt i32 %2, 1
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
i8 32, label %12
]
12: ; preds = %6, %6, %6
store i8 0, i8* %10
%13 = icmp ugt i64 %7, 2
br i1 %13, label %6, label %14
14: ; preds = %12, %6, %1
ret void
}