const char *object_type_name(int code) {
  switch (code) {
  case 0x0:
    return "OT_FIXNUM";
  case 0x1:
    return "OT_CHARACTER";
  case 0x2:
    return "OT_STRING";
  case 0x3:
    return "OT_SYMBOL";
  case 0x4:
    return "OT_STATIC";
  case 0x5:
    return "OT_PAIR_BEGIN";
  case 0x6:
    return "OT_PAIR_END";
  case 0x7:
    return "OT_STRUCT";
  case 0x8:
    return "OT_BOOLEAN";
  case 0x9:
    return "OT_NULL";
  }
  return "unknown";
}


x86 assembly (clang, -O0):
<object_type_name>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
mov    %rax,-0x18(%rbp)
sub    $0x9,%rax
ja     11cc <object_type_name+0xcc>
mov    -0x18(%rbp),%rax
lea    0xedd(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xef5(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11d7 <object_type_name+0xd7>
lea    0xeef(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11d7 <object_type_name+0xd7>
lea    0xeec(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11d7 <object_type_name+0xd7>
lea    0xee6(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11d7 <object_type_name+0xd7>
lea    0xee0(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11d7 <object_type_name+0xd7>
lea    0xeda(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11d7 <object_type_name+0xd7>
lea    0xed8(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11d7 <object_type_name+0xd7>
lea    0xed4(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11d7 <object_type_name+0xd7>
lea    0xece(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11d7 <object_type_name+0xd7>
lea    0xec9(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11d7 <object_type_name+0xd7>
lea    0xec1(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<object_type_name>:
cmp    $0x9,%edi
ja     1117 <object_type_name+0x17>
movslq %edi,%rax
lea    0xf65(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xf4e(%rip),%rax
ret

LLVM IR (-O0):
@.str = [10 x i8] c"OT_FIXNUM\00"
@.str.1 = [13 x i8] c"OT_CHARACTER\00"
@.str.2 = [10 x i8] c"OT_STRING\00"
@.str.3 = [10 x i8] c"OT_SYMBOL\00"
@.str.4 = [10 x i8] c"OT_STATIC\00"
@.str.5 = [14 x i8] c"OT_PAIR_BEGIN\00"
@.str.6 = [12 x i8] c"OT_PAIR_END\00"
@.str.7 = [10 x i8] c"OT_STRUCT\00"
@.str.8 = [11 x i8] c"OT_BOOLEAN\00"
@.str.9 = [8 x i8] c"OT_NULL\00"
@.str.10 = [8 x i8] c"unknown\00"
define i8* @object_type_name(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %15 [
i32 0, 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
i32 8, label %13
i32 9, label %14
]
5: ; preds = %1
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0), i8** %2
br label %16
6: ; preds = %1
store i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %16
7: ; preds = %1
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %16
8: ; preds = %1
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %16
9: ; preds = %1
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %16
10: ; preds = %1
store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %16
11: ; preds = %1
store i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %16
12: ; preds = %1
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.7, i64 0, i64 0), i8** %2
br label %16
13: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.8, i64 0, i64 0), i8** %2
br label %16
14: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.9, i64 0, i64 0), i8** %2
br label %16
15: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.10, i64 0, i64 0), i8** %2
br label %16
16: ; preds = %15, %14, %13, %12, %11, %10, %9, %8, %7, %6, %5
%17 = load i8*, i8** %2
ret i8* %17
}

LLVM IR (-O2):
@.str = [10 x i8] c"OT_FIXNUM\00"
@.str.1 = [13 x i8] c"OT_CHARACTER\00"
@.str.2 = [10 x i8] c"OT_STRING\00"
@.str.3 = [10 x i8] c"OT_SYMBOL\00"
@.str.4 = [10 x i8] c"OT_STATIC\00"
@.str.5 = [14 x i8] c"OT_PAIR_BEGIN\00"
@.str.6 = [12 x i8] c"OT_PAIR_END\00"
@.str.7 = [10 x i8] c"OT_STRUCT\00"
@.str.8 = [11 x i8] c"OT_BOOLEAN\00"
@.str.9 = [8 x i8] c"OT_NULL\00"
@.str.10 = [8 x i8] c"unknown\00"
@reltable.object_type_name = [10 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([10 x i8]* @.str to i64), i64 ptrtoint ([10 x i32]* @reltable.object_type_name to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([13 x i8]* @.str.1 to i64), i64 ptrtoint ([10 x i32]* @reltable.object_type_name to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([10 x i8]* @.str.2 to i64), i64 ptrtoint ([10 x i32]* @reltable.object_type_name to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([10 x i8]* @.str.3 to i64), i64 ptrtoint ([10 x i32]* @reltable.object_type_name to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([10 x i8]* @.str.4 to i64), i64 ptrtoint ([10 x i32]* @reltable.object_type_name to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([14 x i8]* @.str.5 to i64), i64 ptrtoint ([10 x i32]* @reltable.object_type_name to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([12 x i8]* @.str.6 to i64), i64 ptrtoint ([10 x i32]* @reltable.object_type_name to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([10 x i8]* @.str.7 to i64), i64 ptrtoint ([10 x i32]* @reltable.object_type_name to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([11 x i8]* @.str.8 to i64), i64 ptrtoint ([10 x i32]* @reltable.object_type_name to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.9 to i64), i64 ptrtoint ([10 x i32]* @reltable.object_type_name to i64)) to i32)]
define i8* @object_type_name(i32 %0) {
%2 = icmp ult i32 %0, 10
br i1 %2, label %3, label %7
3: ; preds = %1
%4 = sext i32 %0 to i64
%5 = shl i64 %4, 2
%6 = call i8* @llvm.load.relative.i64(i8* bitcast ([10 x i32]* @reltable.object_type_name to i8*), i64 %5)
br label %7
7: ; preds = %1, %3
%8 = phi i8* [ %6, %3 ], [ getelementptr inbounds ([8 x i8], [8 x i8]* @.str.10, i64 0, i64 0), %1 ]
ret i8* %8
}