const char *mpeg_h_3d_audio_level(unsigned char x) {
  switch (x) {
  case 0:
    return "Unspecified";
  case 1:
    return "Level 1";
  case 2:
    return "Level 2";
  case 3:
    return "Level 3";
  case 4:
    return "Level 4";
  case 5:
    return "Level 5";
  case 6:
    return "Reserved";
  case 7:
    return "Reserved";
  }
  return "BROKEN";
}


x86 assembly (clang, -O0):
<mpeg_h_3d_audio_level>:
push   %rbp
mov    %rsp,%rbp
mov    %dil,%al
mov    %al,-0x9(%rbp)
movzbl -0x9(%rbp),%eax
mov    %rax,-0x18(%rbp)
sub    $0x7,%rax
ja     11b0 <mpeg_h_3d_audio_level+0xb0>
mov    -0x18(%rbp),%rax
lea    0xed9(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xee9(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <mpeg_h_3d_audio_level+0xbb>
lea    0xee5(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <mpeg_h_3d_audio_level+0xbb>
lea    0xedd(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <mpeg_h_3d_audio_level+0xbb>
lea    0xed5(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <mpeg_h_3d_audio_level+0xbb>
lea    0xecd(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <mpeg_h_3d_audio_level+0xbb>
lea    0xec5(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <mpeg_h_3d_audio_level+0xbb>
lea    0xebd(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <mpeg_h_3d_audio_level+0xbb>
lea    0xead(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <mpeg_h_3d_audio_level+0xbb>
lea    0xea6(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<mpeg_h_3d_audio_level>:
cmp    $0x7,%dil
ja     1119 <mpeg_h_3d_audio_level+0x19>
movsbq %dil,%rax
lea    0xf33(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xf1d(%rip),%rax
ret

LLVM IR (-O0):
@.str = [12 x i8] c"Unspecified\00"
@.str.1 = [8 x i8] c"Level 1\00"
@.str.2 = [8 x i8] c"Level 2\00"
@.str.3 = [8 x i8] c"Level 3\00"
@.str.4 = [8 x i8] c"Level 4\00"
@.str.5 = [8 x i8] c"Level 5\00"
@.str.6 = [9 x i8] c"Reserved\00"
@.str.7 = [7 x i8] c"BROKEN\00"
define i8* @mpeg_h_3d_audio_level(i8 zeroext %0) {
%2 = alloca i8*
%3 = alloca i8
store i8 %0, i8* %3
%4 = load i8, i8* %3
%5 = zext i8 %4 to i32
switch i32 %5, label %14 [
i32 0, label %6
i32 1, label %7
i32 2, label %8
i32 3, label %9
i32 4, label %10
i32 5, label %11
i32 6, label %12
i32 7, label %13
]
6: ; preds = %1
store i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i64 0, i64 0), i8** %2
br label %15
7: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %15
8: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %15
9: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %15
10: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %15
11: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %15
12: ; preds = %1
store i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %15
13: ; preds = %1
store i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %15
14: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.7, i64 0, i64 0), i8** %2
br label %15
15: ; preds = %14, %13, %12, %11, %10, %9, %8, %7, %6
%16 = load i8*, i8** %2
ret i8* %16
}

LLVM IR (-O2):
@.str = [12 x i8] c"Unspecified\00"
@.str.1 = [8 x i8] c"Level 1\00"
@.str.2 = [8 x i8] c"Level 2\00"
@.str.3 = [8 x i8] c"Level 3\00"
@.str.4 = [8 x i8] c"Level 4\00"
@.str.5 = [8 x i8] c"Level 5\00"
@.str.6 = [9 x i8] c"Reserved\00"
@.str.7 = [7 x i8] c"BROKEN\00"
@reltable.mpeg_h_3d_audio_level = [8 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([12 x i8]* @.str to i64), i64 ptrtoint ([8 x i32]* @reltable.mpeg_h_3d_audio_level to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.1 to i64), i64 ptrtoint ([8 x i32]* @reltable.mpeg_h_3d_audio_level to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.2 to i64), i64 ptrtoint ([8 x i32]* @reltable.mpeg_h_3d_audio_level to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.3 to i64), i64 ptrtoint ([8 x i32]* @reltable.mpeg_h_3d_audio_level to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.4 to i64), i64 ptrtoint ([8 x i32]* @reltable.mpeg_h_3d_audio_level to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.5 to i64), i64 ptrtoint ([8 x i32]* @reltable.mpeg_h_3d_audio_level to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([9 x i8]* @.str.6 to i64), i64 ptrtoint ([8 x i32]* @reltable.mpeg_h_3d_audio_level to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([9 x i8]* @.str.6 to i64), i64 ptrtoint ([8 x i32]* @reltable.mpeg_h_3d_audio_level to i64)) to i32)]
define i8* @mpeg_h_3d_audio_level(i8 zeroext %0) {
%2 = icmp ult i8 %0, 8
br i1 %2, label %3, label %7
3: ; preds = %1
%4 = sext i8 %0 to i64
%5 = shl i64 %4, 2
%6 = call i8* @llvm.load.relative.i64(i8* bitcast ([8 x i32]* @reltable.mpeg_h_3d_audio_level to i8*), i64 %5)
br label %7
7: ; preds = %1, %3
%8 = phi i8* [ %6, %3 ], [ getelementptr inbounds ([7 x i8], [7 x i8]* @.str.7, i64 0, i64 0), %1 ]
ret i8* %8
}