int rsock_ip_level_to_int(const char *str, long len, int *valp) {
  switch (len) {
  case 2:
    return -1;
  case 3:
    return -1;
  case 4:
    return -1;
  case 5:
    return -1;
  case 6:
    return -1;
  case 7:
    return -1;
  case 8:
    return -1;
  case 10:
    return -1;
  case 11:
    return -1;
  case 12:
    return -1;
  case 13:
    return -1;
  case 14:
    return -1;
  case 15:
    return -1;
  case 16:
    return -1;
  default:
    if (!str || !valp) {
    }
    return -1;
  }
}


x86 assembly (clang, -O0):
<rsock_ip_level_to_int>:
push   %rbp
mov    %rsp,%rbp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
mov    %rdx,-0x20(%rbp)
mov    -0x18(%rbp),%rax
add    $0xfffffffffffffffe,%rax
mov    %rax,-0x28(%rbp)
sub    $0xe,%rax
ja     11e2 <rsock_ip_level_to_int+0xe2>
mov    -0x28(%rbp),%rax
lea    0xecf(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
movl   $0xffffffff,-0x4(%rbp)
jmp    1204 <rsock_ip_level_to_int+0x104>
movl   $0xffffffff,-0x4(%rbp)
jmp    1204 <rsock_ip_level_to_int+0x104>
movl   $0xffffffff,-0x4(%rbp)
jmp    1204 <rsock_ip_level_to_int+0x104>
movl   $0xffffffff,-0x4(%rbp)
jmp    1204 <rsock_ip_level_to_int+0x104>
movl   $0xffffffff,-0x4(%rbp)
jmp    1204 <rsock_ip_level_to_int+0x104>
movl   $0xffffffff,-0x4(%rbp)
jmp    1204 <rsock_ip_level_to_int+0x104>
movl   $0xffffffff,-0x4(%rbp)
jmp    1204 <rsock_ip_level_to_int+0x104>
movl   $0xffffffff,-0x4(%rbp)
jmp    1204 <rsock_ip_level_to_int+0x104>
movl   $0xffffffff,-0x4(%rbp)
jmp    1204 <rsock_ip_level_to_int+0x104>
movl   $0xffffffff,-0x4(%rbp)
jmp    1204 <rsock_ip_level_to_int+0x104>
movl   $0xffffffff,-0x4(%rbp)
jmp    1204 <rsock_ip_level_to_int+0x104>
movl   $0xffffffff,-0x4(%rbp)
jmp    1204 <rsock_ip_level_to_int+0x104>
movl   $0xffffffff,-0x4(%rbp)
jmp    1204 <rsock_ip_level_to_int+0x104>
movl   $0xffffffff,-0x4(%rbp)
jmp    1204 <rsock_ip_level_to_int+0x104>
cmpq   $0x0,-0x10(%rbp)
je     11f8 <rsock_ip_level_to_int+0xf8>
cmpq   $0x0,-0x20(%rbp)
jne    11fd <rsock_ip_level_to_int+0xfd>
jmp    11fd <rsock_ip_level_to_int+0xfd>
movl   $0xffffffff,-0x4(%rbp)
mov    -0x4(%rbp),%eax
pop    %rbp
ret

x86 assembly (clang, -O2):
<rsock_ip_level_to_int>:
mov    $0xffffffff,%eax
ret

LLVM IR (-O0):
define i32 @rsock_ip_level_to_int(i8* %0, i64 %1, i32* %2) {
%4 = alloca i32
%5 = alloca i8*
%6 = alloca i64
%7 = alloca i32*
store i8* %0, i8** %5
store i64 %1, i64* %6
store i32* %2, i32** %7
%8 = load i64, i64* %6
switch i64 %8, label %23 [
i64 2, label %9
i64 3, label %10
i64 4, label %11
i64 5, label %12
i64 6, label %13
i64 7, label %14
i64 8, label %15
i64 10, label %16
i64 11, label %17
i64 12, label %18
i64 13, label %19
i64 14, label %20
i64 15, label %21
i64 16, label %22
]
9: ; preds = %3
store i32 -1, i32* %4
br label %31
10: ; preds = %3
store i32 -1, i32* %4
br label %31
11: ; preds = %3
store i32 -1, i32* %4
br label %31
12: ; preds = %3
store i32 -1, i32* %4
br label %31
13: ; preds = %3
store i32 -1, i32* %4
br label %31
14: ; preds = %3
store i32 -1, i32* %4
br label %31
15: ; preds = %3
store i32 -1, i32* %4
br label %31
16: ; preds = %3
store i32 -1, i32* %4
br label %31
17: ; preds = %3
store i32 -1, i32* %4
br label %31
18: ; preds = %3
store i32 -1, i32* %4
br label %31
19: ; preds = %3
store i32 -1, i32* %4
br label %31
20: ; preds = %3
store i32 -1, i32* %4
br label %31
21: ; preds = %3
store i32 -1, i32* %4
br label %31
22: ; preds = %3
store i32 -1, i32* %4
br label %31
23: ; preds = %3
%24 = load i8*, i8** %5
%25 = icmp ne i8* %24, null
br i1 %25, label %26, label %29
26: ; preds = %23
%27 = load i32*, i32** %7
%28 = icmp ne i32* %27, null
br i1 %28, label %30, label %29
29: ; preds = %26, %23
br label %30
30: ; preds = %29, %26
store i32 -1, i32* %4
br label %31
31: ; preds = %30, %22, %21, %20, %19, %18, %17, %16, %15, %14, %13, %12, %11, %10, %9
%32 = load i32, i32* %4
ret i32 %32
}

LLVM IR (-O2):
define i32 @rsock_ip_level_to_int(i8* nocapture readnone %0, i64 %1, i32* nocapture readnone %2) {
ret i32 -1
}