int getLengthOfType(int parameterType) {
  switch (parameterType) {
  case 1:
    return 1;
  case 2:
    return 1;
  case 3:
    return 2;
  case 5:
    return 2;
  case 4:
    return 2;
  case 6:
    return 3;
  case 7:
    return 4;
  case 8:
    return 4;
  case 9:
    return 5;
  case 10:
    return 5;
  case 11:
    return 6;
  case 12:
    return 6;
  case 13:
    return 8;
  case 14:
    return 8;
  case 15:
    return 8;
  case 18:
    return 9;
  case 20:
    return 10;
  case 24:
    return 12;
  case 25:
    return 2;
  case 26:
    return 4;
  case 27:
    return 6;
  }
  return -1;
}


x86 assembly (clang, -O0):
<getLengthOfType>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0x8(%rbp)
mov    -0x8(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,%ecx
mov    %rcx,-0x10(%rbp)
sub    $0x1a,%eax
ja     122c <getLengthOfType+0x12c>
mov    -0x10(%rbp),%rax
lea    0xed9(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
movl   $0x1,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0x1,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0x2,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0x2,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0x2,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0x3,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0x4,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0x4,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0x5,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0x5,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0x6,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0x6,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0x8,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0x8,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0x8,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0x9,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0xa,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0xc,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0x2,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0x4,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0x6,-0x4(%rbp)
jmp    1233 <getLengthOfType+0x133>
movl   $0xffffffff,-0x4(%rbp)
mov    -0x4(%rbp),%eax
pop    %rbp
ret

x86 assembly (clang, -O2):
<getLengthOfType>:
add    $0xffffffff,%edi
mov    $0xffffffff,%eax
cmp    $0x1a,%edi
ja     111a <getLengthOfType+0x1a>
movslq %edi,%rax
lea    0xee9(%rip),%rcx
mov    (%rcx,%rax,4),%eax
ret

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

LLVM IR (-O2):
@switch.table.getLengthOfType = [27 x i32] [i32 1, i32 1, i32 2, i32 2, i32 2, i32 3, i32 4, i32 4, i32 5, i32 5, i32 6, i32 6, i32 8, i32 8, i32 8, i32 -1, i32 -1, i32 9, i32 -1, i32 10, i32 -1, i32 -1, i32 -1, i32 12, i32 2, i32 4, i32 6]
define i32 @getLengthOfType(i32 %0) {
%2 = add i32 %0, -1
%3 = icmp ult i32 %2, 27
br i1 %3, label %4, label %8
4: ; preds = %1
%5 = sext i32 %2 to i64
%6 = getelementptr inbounds [27 x i32], [27 x i32]* @switch.table.getLengthOfType, i64 0, i64 %5
%7 = load i32, i32* %6
br label %8
8: ; preds = %1, %4
%9 = phi i32 [ %7, %4 ], [ -1, %1 ]
ret i32 %9
}