const char *v8_t66_to_str(int t66) {
  switch (t66) {
  case 0:
    return "???";
  case 1:
    return "Reserved TIA";
  case 2:
    return "Reserved";
  case 3:
    return "Reserved TIA + others";
  case 4:
    return "Reserved";
  case 5:
    return "Reserved TIA + others";
  case 6:
    return "Reserved";
  case 7:
    return "Reserved TIA + others";
  }
  return "???";
}


x86 assembly (clang, -O0):
<v8_t66_to_str>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
mov    %rax,-0x18(%rbp)
sub    $0x7,%rax
ja     11ac <v8_t66_to_str+0xac>
mov    -0x18(%rbp),%rax
lea    0xedd(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xeed(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11b7 <v8_t66_to_str+0xb7>
lea    0xee1(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11b7 <v8_t66_to_str+0xb7>
lea    0xede(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11b7 <v8_t66_to_str+0xb7>
lea    0xed7(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11b7 <v8_t66_to_str+0xb7>
lea    0xebe(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11b7 <v8_t66_to_str+0xb7>
lea    0xeb7(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11b7 <v8_t66_to_str+0xb7>
lea    0xe9e(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11b7 <v8_t66_to_str+0xb7>
lea    0xe97(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11b7 <v8_t66_to_str+0xb7>
lea    0xe6d(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<v8_t66_to_str>:
add    $0xffffffff,%edi
cmp    $0x6,%edi
ja     111a <v8_t66_to_str+0x1a>
movslq %edi,%rax
lea    0xf1e(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xedf(%rip),%rax
ret

LLVM IR (-O0):
@.str = [4 x i8] c"???\00"
@.str.1 = [13 x i8] c"Reserved TIA\00"
@.str.2 = [9 x i8] c"Reserved\00"
@.str.3 = [22 x i8] c"Reserved TIA + others\00"
define i8* @v8_t66_to_str(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %13 [
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
]
5: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i8** %2
br label %14
6: ; preds = %1
store i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %14
7: ; preds = %1
store i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %14
8: ; preds = %1
store i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %14
9: ; preds = %1
store i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %14
10: ; preds = %1
store i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %14
11: ; preds = %1
store i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %14
12: ; preds = %1
store i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %14
13: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, 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 = [4 x i8] c"???\00"
@.str.1 = [13 x i8] c"Reserved TIA\00"
@.str.2 = [9 x i8] c"Reserved\00"
@.str.3 = [22 x i8] c"Reserved TIA + others\00"
@reltable.v8_t66_to_str = [7 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([13 x i8]* @.str.1 to i64), i64 ptrtoint ([7 x i32]* @reltable.v8_t66_to_str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([9 x i8]* @.str.2 to i64), i64 ptrtoint ([7 x i32]* @reltable.v8_t66_to_str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([22 x i8]* @.str.3 to i64), i64 ptrtoint ([7 x i32]* @reltable.v8_t66_to_str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([9 x i8]* @.str.2 to i64), i64 ptrtoint ([7 x i32]* @reltable.v8_t66_to_str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([22 x i8]* @.str.3 to i64), i64 ptrtoint ([7 x i32]* @reltable.v8_t66_to_str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([9 x i8]* @.str.2 to i64), i64 ptrtoint ([7 x i32]* @reltable.v8_t66_to_str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([22 x i8]* @.str.3 to i64), i64 ptrtoint ([7 x i32]* @reltable.v8_t66_to_str to i64)) to i32)]
define i8* @v8_t66_to_str(i32 %0) {
%2 = add i32 %0, -1
%3 = icmp ult i32 %2, 7
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 ([7 x i32]* @reltable.v8_t66_to_str to i8*), i64 %6)
br label %8
8: ; preds = %4, %1
%9 = phi i8* [ getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), %1 ], [ %7, %4 ]
ret i8* %9
}