char *mgt_type(unsigned char b) {
  char *s;
  switch (b) {
  case 0x01:
    s = "SysMgt_URL";
    break;
  case 0x02:
    s = "SystemName";
    break;
  case 0x03:
    s = "SysPingAddr";
    break;
  case 0x04:
    s = "Compon_URL";
    break;
  case 0x05:
    s = "ComponName";
    break;
  case 0x06:
    s = "ComponPing";
    break;
  case 0x07:
  default:
    s = "SysGUID";
    break;
  }
  return (s);
}


x86 assembly (clang, -O0):
<mgt_type>:
push   %rbp
mov    %rsp,%rbp
mov    %dil,%al
mov    %al,-0x1(%rbp)
movzbl -0x1(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,%ecx
mov    %rcx,-0x18(%rbp)
sub    $0x6,%eax
ja     1199 <mgt_type+0x99>
mov    -0x18(%rbp),%rax
lea    0xed5(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xee1(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11a4 <mgt_type+0xa4>
lea    0xedc(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11a4 <mgt_type+0xa4>
lea    0xed7(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11a4 <mgt_type+0xa4>
lea    0xed3(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11a4 <mgt_type+0xa4>
lea    0xece(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11a4 <mgt_type+0xa4>
lea    0xec9(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11a4 <mgt_type+0xa4>
jmp    1199 <mgt_type+0x99>
lea    0xebf(%rip),%rax
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<mgt_type>:
add    $0xff,%dil
cmp    $0x5,%dil
ja     111d <mgt_type+0x1d>
movsbq %dil,%rax
lea    0xf37(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xf1f(%rip),%rax
ret

LLVM IR (-O0):
@.str = [11 x i8] c"SysMgt_URL\00"
@.str.1 = [11 x i8] c"SystemName\00"
@.str.2 = [12 x i8] c"SysPingAddr\00"
@.str.3 = [11 x i8] c"Compon_URL\00"
@.str.4 = [11 x i8] c"ComponName\00"
@.str.5 = [11 x i8] c"ComponPing\00"
@.str.6 = [8 x i8] c"SysGUID\00"
define i8* @mgt_type(i8 zeroext %0) {
%2 = alloca i8
%3 = alloca i8*
store i8 %0, i8* %2
%4 = load i8, i8* %2
%5 = zext i8 %4 to i32
switch i32 %5, label %13 [
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
]
6: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i8** %3
br label %14
7: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i8** %3
br label %14
8: ; preds = %1
store i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0), i8** %3
br label %14
9: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i8** %3
br label %14
10: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.4, i64 0, i64 0), i8** %3
br label %14
11: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.5, i64 0, i64 0), i8** %3
br label %14
12: ; preds = %1
br label %13
13: ; preds = %1, %12
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.6, i64 0, i64 0), i8** %3
br label %14
14: ; preds = %13, %11, %10, %9, %8, %7, %6
%15 = load i8*, i8** %3
ret i8* %15
}

LLVM IR (-O2):
@.str = [11 x i8] c"SysMgt_URL\00"
@.str.1 = [11 x i8] c"SystemName\00"
@.str.2 = [12 x i8] c"SysPingAddr\00"
@.str.3 = [11 x i8] c"Compon_URL\00"
@.str.4 = [11 x i8] c"ComponName\00"
@.str.5 = [11 x i8] c"ComponPing\00"
@.str.6 = [8 x i8] c"SysGUID\00"
@reltable.mgt_type = [6 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([11 x i8]* @.str to i64), i64 ptrtoint ([6 x i32]* @reltable.mgt_type to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([11 x i8]* @.str.1 to i64), i64 ptrtoint ([6 x i32]* @reltable.mgt_type to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([12 x i8]* @.str.2 to i64), i64 ptrtoint ([6 x i32]* @reltable.mgt_type to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([11 x i8]* @.str.3 to i64), i64 ptrtoint ([6 x i32]* @reltable.mgt_type to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([11 x i8]* @.str.4 to i64), i64 ptrtoint ([6 x i32]* @reltable.mgt_type to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([11 x i8]* @.str.5 to i64), i64 ptrtoint ([6 x i32]* @reltable.mgt_type to i64)) to i32)]
define i8* @mgt_type(i8 zeroext %0) {
%2 = add i8 %0, -1
%3 = icmp ult i8 %2, 6
br i1 %3, label %4, label %8
4: ; preds = %1
%5 = sext i8 %2 to i64
%6 = shl i64 %5, 2
%7 = call i8* @llvm.load.relative.i64(i8* bitcast ([6 x i32]* @reltable.mgt_type 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.6, i64 0, i64 0), %1 ]
ret i8* %9
}