const char *_error_str(int error_code) {
  switch (error_code) {
  case 0:
    return "No errors";
  case -1:
    return "Corrupted BluRay disc";
  case -2:
    return "Missing configuration file(s)";
  case -3:
    return "No matching processing key in configuration file(s)";
  case -4:
    return "No valid certificates in configuration file(s)";
  case -5:
    return "All available certificates have been revoked";
  case -6:
    return "MMC open failed";
  case -7:
    return "MMC authentication failed";
  }
  return "Unknown error";
}


x86 assembly (clang, -O0):
<_error_str>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
add    $0x7,%eax
mov    %eax,%ecx
mov    %rcx,-0x18(%rbp)
sub    $0x7,%eax
ja     11b0 <_error_str+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 <_error_str+0xbb>
lea    0xee3(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <_error_str+0xbb>
lea    0xee9(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <_error_str+0xbb>
lea    0xef7(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <_error_str+0xbb>
lea    0xf1b(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <_error_str+0xbb>
lea    0xf3a(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <_error_str+0xbb>
lea    0xf57(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <_error_str+0xbb>
lea    0xf57(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <_error_str+0xbb>
lea    0xf61(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<_error_str>:
add    $0x7,%edi
cmp    $0x7,%edi
ja     111a <_error_str+0x1a>
movslq %edi,%rax
lea    0xff6(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xfd7(%rip),%rax
ret

LLVM IR (-O0):
@.str = [10 x i8] c"No errors\00"
@.str.1 = [22 x i8] c"Corrupted BluRay disc\00"
@.str.2 = [30 x i8] c"Missing configuration file(s)\00"
@.str.3 = [52 x i8] c"No matching processing key in configuration file(s)\00"
@.str.4 = [47 x i8] c"No valid certificates in configuration file(s)\00"
@.str.5 = [45 x i8] c"All available certificates have been revoked\00"
@.str.6 = [16 x i8] c"MMC open failed\00"
@.str.7 = [26 x i8] c"MMC authentication failed\00"
@.str.8 = [14 x i8] c"Unknown error\00"
define i8* @_error_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 ([10 x i8], [10 x i8]* @.str, i64 0, i64 0), i8** %2
br label %14
6: ; preds = %1
store i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %14
7: ; preds = %1
store i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %14
8: ; preds = %1
store i8* getelementptr inbounds ([52 x i8], [52 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %14
9: ; preds = %1
store i8* getelementptr inbounds ([47 x i8], [47 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %14
10: ; preds = %1
store i8* getelementptr inbounds ([45 x i8], [45 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %14
11: ; preds = %1
store i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %14
12: ; preds = %1
store i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.7, i64 0, i64 0), i8** %2
br label %14
13: ; preds = %1
store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.8, 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 = [10 x i8] c"No errors\00"
@.str.1 = [22 x i8] c"Corrupted BluRay disc\00"
@.str.2 = [30 x i8] c"Missing configuration file(s)\00"
@.str.3 = [52 x i8] c"No matching processing key in configuration file(s)\00"
@.str.4 = [47 x i8] c"No valid certificates in configuration file(s)\00"
@.str.5 = [45 x i8] c"All available certificates have been revoked\00"
@.str.6 = [16 x i8] c"MMC open failed\00"
@.str.7 = [26 x i8] c"MMC authentication failed\00"
@.str.8 = [14 x i8] c"Unknown error\00"
@reltable._error_str = [8 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([26 x i8]* @.str.7 to i64), i64 ptrtoint ([8 x i32]* @reltable._error_str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([16 x i8]* @.str.6 to i64), i64 ptrtoint ([8 x i32]* @reltable._error_str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([45 x i8]* @.str.5 to i64), i64 ptrtoint ([8 x i32]* @reltable._error_str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([47 x i8]* @.str.4 to i64), i64 ptrtoint ([8 x i32]* @reltable._error_str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([52 x i8]* @.str.3 to i64), i64 ptrtoint ([8 x i32]* @reltable._error_str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([30 x i8]* @.str.2 to i64), i64 ptrtoint ([8 x i32]* @reltable._error_str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([22 x i8]* @.str.1 to i64), i64 ptrtoint ([8 x i32]* @reltable._error_str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([10 x i8]* @.str to i64), i64 ptrtoint ([8 x i32]* @reltable._error_str to i64)) to i32)]
define i8* @_error_str(i32 %0) {
%2 = add i32 %0, 7
%3 = icmp ult i32 %2, 8
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 ([8 x i32]* @reltable._error_str to i8*), i64 %6)
br label %8
8: ; preds = %1, %4
%9 = phi i8* [ %7, %4 ], [ getelementptr inbounds ([14 x i8], [14 x i8]* @.str.8, i64 0, i64 0), %1 ]
ret i8* %9
}