char *sc_err2str(int exitcode) {
  switch (exitcode) {
  case 0:
    return "Unknown error or no error occured";
    break;
  case 1:
    return "Allocation failed - out of memory?";
    break;
  case 2:
    return "Failed to start Selenium listener";
    break;
  case 3:
    return "Failed to accept Selenium connection";
    break;
  case 4:
    return "Invalid KGP packet received";
    break;
  case 5:
    return "KGP connection error";
    break;
  case 6:
    return "KGP connection closed from the other side";
    break;
  case 7:
    return "Failed to start KGP listener";
    break;
  case 8:
    return "Terminated";
    break;
  case 9:
    return "Internal error: command socket failure";
    break;
  case 10:
    return "Internal error: command socket closed";
    break;
  case 11:
    return "DNS reset failed";
    break;
  default:
    return "Invalid exit code";
    break;
  }
}


x86 assembly (clang, -O0):
<sc_err2str>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
mov    %rax,-0x18(%rbp)
sub    $0xb,%rax
ja     11ec <sc_err2str+0xec>
mov    -0x18(%rbp),%rax
lea    0xedd(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xefd(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11f7 <sc_err2str+0xf7>
lea    0xf0f(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11f7 <sc_err2str+0xf7>
lea    0xf22(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11f7 <sc_err2str+0xf7>
lea    0xf34(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11f7 <sc_err2str+0xf7>
lea    0xf49(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11f7 <sc_err2str+0xf7>
lea    0xf55(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11f7 <sc_err2str+0xf7>
lea    0xf5a(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11f7 <sc_err2str+0xf7>
lea    0xf74(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11f7 <sc_err2str+0xf7>
lea    0xf81(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11f7 <sc_err2str+0xf7>
lea    0xf7c(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11f7 <sc_err2str+0xf7>
lea    0xf93(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11f7 <sc_err2str+0xf7>
lea    0xfa9(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11f7 <sc_err2str+0xf7>
lea    0xfaa(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<sc_err2str>:
cmp    $0xb,%edi
ja     1117 <sc_err2str+0x17>
movslq %edi,%rax
lea    0x1071(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0x104f(%rip),%rax
ret

LLVM IR (-O0):
@.str = [34 x i8] c"Unknown error or no error occured\00"
@.str.1 = [35 x i8] c"Allocation failed - out of memory?\00"
@.str.2 = [34 x i8] c"Failed to start Selenium listener\00"
@.str.3 = [37 x i8] c"Failed to accept Selenium connection\00"
@.str.4 = [28 x i8] c"Invalid KGP packet received\00"
@.str.5 = [21 x i8] c"KGP connection error\00"
@.str.6 = [42 x i8] c"KGP connection closed from the other side\00"
@.str.7 = [29 x i8] c"Failed to start KGP listener\00"
@.str.8 = [11 x i8] c"Terminated\00"
@.str.9 = [39 x i8] c"Internal error: command socket failure\00"
@.str.10 = [38 x i8] c"Internal error: command socket closed\00"
@.str.11 = [17 x i8] c"DNS reset failed\00"
@.str.12 = [18 x i8] c"Invalid exit code\00"
define i8* @sc_err2str(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %17 [
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
i32 10, label %15
i32 11, label %16
]
5: ; preds = %1
store i8* getelementptr inbounds ([34 x i8], [34 x i8]* @.str, i64 0, i64 0), i8** %2
br label %18
6: ; preds = %1
store i8* getelementptr inbounds ([35 x i8], [35 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %18
7: ; preds = %1
store i8* getelementptr inbounds ([34 x i8], [34 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %18
8: ; preds = %1
store i8* getelementptr inbounds ([37 x i8], [37 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %18
9: ; preds = %1
store i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %18
10: ; preds = %1
store i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %18
11: ; preds = %1
store i8* getelementptr inbounds ([42 x i8], [42 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %18
12: ; preds = %1
store i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.7, i64 0, i64 0), i8** %2
br label %18
13: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.8, i64 0, i64 0), i8** %2
br label %18
14: ; preds = %1
store i8* getelementptr inbounds ([39 x i8], [39 x i8]* @.str.9, i64 0, i64 0), i8** %2
br label %18
15: ; preds = %1
store i8* getelementptr inbounds ([38 x i8], [38 x i8]* @.str.10, i64 0, i64 0), i8** %2
br label %18
16: ; preds = %1
store i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.11, i64 0, i64 0), i8** %2
br label %18
17: ; preds = %1
store i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.12, i64 0, i64 0), i8** %2
br label %18
18: ; preds = %17, %16, %15, %14, %13, %12, %11, %10, %9, %8, %7, %6, %5
%19 = load i8*, i8** %2
ret i8* %19
}

LLVM IR (-O2):
@.str = [34 x i8] c"Unknown error or no error occured\00"
@.str.1 = [35 x i8] c"Allocation failed - out of memory?\00"
@.str.2 = [34 x i8] c"Failed to start Selenium listener\00"
@.str.3 = [37 x i8] c"Failed to accept Selenium connection\00"
@.str.4 = [28 x i8] c"Invalid KGP packet received\00"
@.str.5 = [21 x i8] c"KGP connection error\00"
@.str.6 = [42 x i8] c"KGP connection closed from the other side\00"
@.str.7 = [29 x i8] c"Failed to start KGP listener\00"
@.str.8 = [11 x i8] c"Terminated\00"
@.str.9 = [39 x i8] c"Internal error: command socket failure\00"
@.str.10 = [38 x i8] c"Internal error: command socket closed\00"
@.str.11 = [17 x i8] c"DNS reset failed\00"
@.str.12 = [18 x i8] c"Invalid exit code\00"
@reltable.sc_err2str = [12 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([34 x i8]* @.str to i64), i64 ptrtoint ([12 x i32]* @reltable.sc_err2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([35 x i8]* @.str.1 to i64), i64 ptrtoint ([12 x i32]* @reltable.sc_err2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([34 x i8]* @.str.2 to i64), i64 ptrtoint ([12 x i32]* @reltable.sc_err2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([37 x i8]* @.str.3 to i64), i64 ptrtoint ([12 x i32]* @reltable.sc_err2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([28 x i8]* @.str.4 to i64), i64 ptrtoint ([12 x i32]* @reltable.sc_err2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([21 x i8]* @.str.5 to i64), i64 ptrtoint ([12 x i32]* @reltable.sc_err2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([42 x i8]* @.str.6 to i64), i64 ptrtoint ([12 x i32]* @reltable.sc_err2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([29 x i8]* @.str.7 to i64), i64 ptrtoint ([12 x i32]* @reltable.sc_err2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([11 x i8]* @.str.8 to i64), i64 ptrtoint ([12 x i32]* @reltable.sc_err2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([39 x i8]* @.str.9 to i64), i64 ptrtoint ([12 x i32]* @reltable.sc_err2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([38 x i8]* @.str.10 to i64), i64 ptrtoint ([12 x i32]* @reltable.sc_err2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.11 to i64), i64 ptrtoint ([12 x i32]* @reltable.sc_err2str to i64)) to i32)]
define i8* @sc_err2str(i32 %0) {
%2 = icmp ult i32 %0, 12
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 ([12 x i32]* @reltable.sc_err2str to i8*), i64 %5)
br label %7
7: ; preds = %1, %3
%8 = phi i8* [ %6, %3 ], [ getelementptr inbounds ([18 x i8], [18 x i8]* @.str.12, i64 0, i64 0), %1 ]
ret i8* %8
}