char const *get_string(int stringNum) {
  switch (stringNum) {
  case 0:
    return "Bitz";
  case 1:
    return "Bytez";
  case 2:
    return "Wordz";
  case 3:
    return "Fancywordz";
  case 4:
    return "Longz";
  case 42:
    return "Answerz";
  default:
    return "Nothing";
  }
}


x86 assembly (clang, -O0):
<get_string>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
mov    %rax,-0x18(%rbp)
sub    $0x2a,%rax
ja     118c <get_string+0x8c>
mov    -0x18(%rbp),%rax
lea    0xedd(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xf79(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1197 <get_string+0x97>
lea    0xf6e(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1197 <get_string+0x97>
lea    0xf64(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1197 <get_string+0x97>
lea    0xf5a(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1197 <get_string+0x97>
lea    0xf55(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1197 <get_string+0x97>
lea    0xf4b(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1197 <get_string+0x97>
lea    0xf43(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<get_string>:
cmp    $0x2a,%edi
ja     113e <get_string+0x3e>
lea    0xfa0(%rip),%rax
mov    %edi,%ecx
lea    0xeeb(%rip),%rdx
movslq (%rdx,%rcx,4),%rcx
add    %rdx,%rcx
jmp    *%rcx
lea    0xf8c(%rip),%rax
ret
lea    0xf8a(%rip),%rax
ret
lea    0xf88(%rip),%rax
ret
lea    0xf8b(%rip),%rax
ret
lea    0xf91(%rip),%rax
ret
lea    0xf81(%rip),%rax
ret

LLVM IR (-O0):
@.str = [5 x i8] c"Bitz\00"
@.str.1 = [6 x i8] c"Bytez\00"
@.str.2 = [6 x i8] c"Wordz\00"
@.str.3 = [11 x i8] c"Fancywordz\00"
@.str.4 = [6 x i8] c"Longz\00"
@.str.5 = [8 x i8] c"Answerz\00"
@.str.6 = [8 x i8] c"Nothing\00"
define i8* @get_string(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %11 [
i32 0, label %5
i32 1, label %6
i32 2, label %7
i32 3, label %8
i32 4, label %9
i32 42, label %10
]
5: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8** %2
br label %12
6: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %12
7: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %12
8: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %12
9: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %12
10: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %12
11: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %12
12: ; preds = %11, %10, %9, %8, %7, %6, %5
%13 = load i8*, i8** %2
ret i8* %13
}

LLVM IR (-O2):
@.str = [5 x i8] c"Bitz\00"
@.str.1 = [6 x i8] c"Bytez\00"
@.str.2 = [6 x i8] c"Wordz\00"
@.str.3 = [11 x i8] c"Fancywordz\00"
@.str.4 = [6 x i8] c"Longz\00"
@.str.5 = [8 x i8] c"Answerz\00"
@.str.6 = [8 x i8] c"Nothing\00"
define i8* @get_string(i32 %0) {
switch i32 %0, label %7 [
i32 0, label %8
i32 1, label %2
i32 2, label %3
i32 3, label %4
i32 4, label %5
i32 42, label %6
]
2: ; preds = %1
br label %8
3: ; preds = %1
br label %8
4: ; preds = %1
br label %8
5: ; preds = %1
br label %8
6: ; preds = %1
br label %8
7: ; preds = %1
br label %8
8: ; preds = %1, %7, %6, %5, %4, %3, %2
%9 = phi i8* [ getelementptr inbounds ([8 x i8], [8 x i8]* @.str.6, i64 0, i64 0), %7 ], [ getelementptr inbounds ([8 x i8], [8 x i8]* @.str.5, i64 0, i64 0), %6 ], [ getelementptr inbounds ([6 x i8], [6 x i8]* @.str.4, i64 0, i64 0), %5 ], [ getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), %4 ], [ getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), %3 ], [ getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), %2 ], [ getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), %1 ]
ret i8* %9
}