char *tokenCategory2String(int type) {
  switch (type) {
  case -1:
    return "Invalid token";
    break;
  case 1:
    return "Identifier";
    break;
  case 2:
    return "Number";
    break;
  case 3:
    return "String";
    break;
  case 4:
    return "Relational Operator";
    break;
  case 5:
    return "Arithmetic Operator";
    break;
  case 6:
    return "Delimeter";
    break;
  case 7:
    return "Comment";
    break;
  default:
    return "Invalid";
    break;
  }
  return "Invalid";
}


x86 assembly (clang, -O0):
<tokenCategory2String>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,%ecx
mov    %rcx,-0x18(%rbp)
sub    $0x8,%eax
ja     11b0 <tokenCategory2String+0xb0>
mov    -0x18(%rbp),%rax
lea    0xed9(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xeed(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <tokenCategory2String+0xbb>
lea    0xeeb(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <tokenCategory2String+0xbb>
lea    0xee6(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <tokenCategory2String+0xbb>
lea    0xedd(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <tokenCategory2String+0xbb>
lea    0xed4(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <tokenCategory2String+0xbb>
lea    0xed8(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <tokenCategory2String+0xbb>
lea    0xedc(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <tokenCategory2String+0xbb>
lea    0xed6(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <tokenCategory2String+0xbb>
lea    0xece(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<tokenCategory2String>:
add    $0x1,%edi
cmp    $0x8,%edi
ja     111a <tokenCategory2String+0x1a>
movslq %edi,%rax
lea    0xf5a(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xf40(%rip),%rax
ret

LLVM IR (-O0):
@.str = [14 x i8] c"Invalid token\00"
@.str.1 = [11 x i8] c"Identifier\00"
@.str.2 = [7 x i8] c"Number\00"
@.str.3 = [7 x i8] c"String\00"
@.str.4 = [20 x i8] c"Relational Operator\00"
@.str.5 = [20 x i8] c"Arithmetic Operator\00"
@.str.6 = [10 x i8] c"Delimeter\00"
@.str.7 = [8 x i8] c"Comment\00"
@.str.8 = [8 x i8] c"Invalid\00"
define i8* @tokenCategory2String(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %13 [
i32 -1, label %5
i32 1, label %6
i32 2, label %7
i32 3, label %8
i32 4, label %9
i32 5, label %10
i32 6, label %11
i32 7, label %12
]
5: ; preds = %1
store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i8** %2
br label %14
6: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %14
7: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %14
8: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %14
9: ; preds = %1
store i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %14
10: ; preds = %1
store i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %14
11: ; preds = %1
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %14
12: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.7, i64 0, i64 0), i8** %2
br label %14
13: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.8, i64 0, i64 0), i8** %2
br label %14
14: ; preds = %13, %12, %11, %10, %9, %8, %7, %6, %5
%15 = load i8*, i8** %2
ret i8* %15
}

LLVM IR (-O2):
@.str = [14 x i8] c"Invalid token\00"
@.str.1 = [11 x i8] c"Identifier\00"
@.str.2 = [7 x i8] c"Number\00"
@.str.3 = [7 x i8] c"String\00"
@.str.4 = [20 x i8] c"Relational Operator\00"
@.str.5 = [20 x i8] c"Arithmetic Operator\00"
@.str.6 = [10 x i8] c"Delimeter\00"
@.str.7 = [8 x i8] c"Comment\00"
@.str.8 = [8 x i8] c"Invalid\00"
@reltable.tokenCategory2String = [9 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([14 x i8]* @.str to i64), i64 ptrtoint ([9 x i32]* @reltable.tokenCategory2String to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.8 to i64), i64 ptrtoint ([9 x i32]* @reltable.tokenCategory2String to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([11 x i8]* @.str.1 to i64), i64 ptrtoint ([9 x i32]* @reltable.tokenCategory2String to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([7 x i8]* @.str.2 to i64), i64 ptrtoint ([9 x i32]* @reltable.tokenCategory2String to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([7 x i8]* @.str.3 to i64), i64 ptrtoint ([9 x i32]* @reltable.tokenCategory2String to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.4 to i64), i64 ptrtoint ([9 x i32]* @reltable.tokenCategory2String to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.5 to i64), i64 ptrtoint ([9 x i32]* @reltable.tokenCategory2String to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([10 x i8]* @.str.6 to i64), i64 ptrtoint ([9 x i32]* @reltable.tokenCategory2String to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.7 to i64), i64 ptrtoint ([9 x i32]* @reltable.tokenCategory2String to i64)) to i32)]
define i8* @tokenCategory2String(i32 %0) {
%2 = add i32 %0, 1
%3 = icmp ult i32 %2, 9
br i1 %3, label %4, label %8
4: ; preds = %1
%5 = sext i32 %2 to i64
%6 = shl i64 %5, 2
%7 = call i8* @llvm.load.relative.i64(i8* bitcast ([9 x i32]* @reltable.tokenCategory2String to i8*), i64 %6)
br label %8
8: ; preds = %1, %4
%9 = phi i8* [ %7, %4 ], [ getelementptr inbounds ([8 x i8], [8 x i8]* @.str.8, i64 0, i64 0), %1 ]
ret i8* %9
}