char *nv_parse_strerror(int status) {
  switch (status) {
  case 0:
    return "No error";
    break;
  case 1:
    return "Bad argument";
    break;
  case 2:
    return "Emtpy string";
    break;
  case 3:
    return "The attribute name is too long";
    break;
  case 4:
    return "Missing attribute name";
    break;
  case 5:
    return "Malformed display device identification";
    break;
  case 6:
    return "Missing equal sign after attribute name";
    break;
  case 7:
    return "No attribute value specified";
    break;
  case 8:
    return "Trailing garbage";
    break;
  case 9:
    return "Unrecognized attribute name";
    break;
  case 10:
    return "Missing comma in packed integer value";
    break;
  case 11:
    return "No colon in target specification";
    break;
  case 12:
    return "Bad target in target specification";
    break;
  case 13:
    return "No target ID in target specification";
    break;
  case 14:
    return "Bad target ID in target specification";
    break;
  case 15:
    return "Trailing garbage after target specification";
    break;
  default:
    return "Unknown error";
    break;
  }
}


x86 assembly (clang, -O0):
<nv_parse_strerror>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
mov    %rax,-0x18(%rbp)
sub    $0xf,%rax
ja     122c <nv_parse_strerror+0x12c>
mov    -0x18(%rbp),%rax
lea    0xedd(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xf0d(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1237 <nv_parse_strerror+0x137>
lea    0xf06(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1237 <nv_parse_strerror+0x137>
lea    0xf03(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1237 <nv_parse_strerror+0x137>
lea    0xf00(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1237 <nv_parse_strerror+0x137>
lea    0xf0f(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1237 <nv_parse_strerror+0x137>
lea    0xf16(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1237 <nv_parse_strerror+0x137>
lea    0xf2e(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1237 <nv_parse_strerror+0x137>
lea    0xf46(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1237 <nv_parse_strerror+0x137>
lea    0xf53(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1237 <nv_parse_strerror+0x137>
lea    0xf54(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1237 <nv_parse_strerror+0x137>
lea    0xf60(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1237 <nv_parse_strerror+0x137>
lea    0xf76(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1237 <nv_parse_strerror+0x137>
lea    0xf87(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1237 <nv_parse_strerror+0x137>
lea    0xf9a(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1237 <nv_parse_strerror+0x137>
lea    0xfaf(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1237 <nv_parse_strerror+0x137>
lea    0xfc5(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1237 <nv_parse_strerror+0x137>
lea    0xfe1(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<nv_parse_strerror>:
cmp    $0xf,%edi
ja     1117 <nv_parse_strerror+0x17>
movslq %edi,%rax
lea    0x10d5(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0x10b6(%rip),%rax
ret

LLVM IR (-O0):
@.str = [9 x i8] c"No error\00"
@.str.1 = [13 x i8] c"Bad argument\00"
@.str.2 = [13 x i8] c"Emtpy string\00"
@.str.3 = [31 x i8] c"The attribute name is too long\00"
@.str.4 = [23 x i8] c"Missing attribute name\00"
@.str.5 = [40 x i8] c"Malformed display device identification\00"
@.str.6 = [40 x i8] c"Missing equal sign after attribute name\00"
@.str.7 = [29 x i8] c"No attribute value specified\00"
@.str.8 = [17 x i8] c"Trailing garbage\00"
@.str.9 = [28 x i8] c"Unrecognized attribute name\00"
@.str.10 = [38 x i8] c"Missing comma in packed integer value\00"
@.str.11 = [33 x i8] c"No colon in target specification\00"
@.str.12 = [35 x i8] c"Bad target in target specification\00"
@.str.13 = [37 x i8] c"No target ID in target specification\00"
@.str.14 = [38 x i8] c"Bad target ID in target specification\00"
@.str.15 = [44 x i8] c"Trailing garbage after target specification\00"
@.str.16 = [14 x i8] c"Unknown error\00"
define i8* @nv_parse_strerror(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %21 [
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
i32 12, label %17
i32 13, label %18
i32 14, label %19
i32 15, label %20
]
5: ; preds = %1
store i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i8** %2
br label %22
6: ; preds = %1
store i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %22
7: ; preds = %1
store i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %22
8: ; preds = %1
store i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %22
9: ; preds = %1
store i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %22
10: ; preds = %1
store i8* getelementptr inbounds ([40 x i8], [40 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %22
11: ; preds = %1
store i8* getelementptr inbounds ([40 x i8], [40 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %22
12: ; preds = %1
store i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.7, i64 0, i64 0), i8** %2
br label %22
13: ; preds = %1
store i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.8, i64 0, i64 0), i8** %2
br label %22
14: ; preds = %1
store i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.9, i64 0, i64 0), i8** %2
br label %22
15: ; preds = %1
store i8* getelementptr inbounds ([38 x i8], [38 x i8]* @.str.10, i64 0, i64 0), i8** %2
br label %22
16: ; preds = %1
store i8* getelementptr inbounds ([33 x i8], [33 x i8]* @.str.11, i64 0, i64 0), i8** %2
br label %22
17: ; preds = %1
store i8* getelementptr inbounds ([35 x i8], [35 x i8]* @.str.12, i64 0, i64 0), i8** %2
br label %22
18: ; preds = %1
store i8* getelementptr inbounds ([37 x i8], [37 x i8]* @.str.13, i64 0, i64 0), i8** %2
br label %22
19: ; preds = %1
store i8* getelementptr inbounds ([38 x i8], [38 x i8]* @.str.14, i64 0, i64 0), i8** %2
br label %22
20: ; preds = %1
store i8* getelementptr inbounds ([44 x i8], [44 x i8]* @.str.15, i64 0, i64 0), i8** %2
br label %22
21: ; preds = %1
store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.16, i64 0, i64 0), i8** %2
br label %22
22: ; preds = %21, %20, %19, %18, %17, %16, %15, %14, %13, %12, %11, %10, %9, %8, %7, %6, %5
%23 = load i8*, i8** %2
ret i8* %23
}

LLVM IR (-O2):
@.str = [9 x i8] c"No error\00"
@.str.1 = [13 x i8] c"Bad argument\00"
@.str.2 = [13 x i8] c"Emtpy string\00"
@.str.3 = [31 x i8] c"The attribute name is too long\00"
@.str.4 = [23 x i8] c"Missing attribute name\00"
@.str.5 = [40 x i8] c"Malformed display device identification\00"
@.str.6 = [40 x i8] c"Missing equal sign after attribute name\00"
@.str.7 = [29 x i8] c"No attribute value specified\00"
@.str.8 = [17 x i8] c"Trailing garbage\00"
@.str.9 = [28 x i8] c"Unrecognized attribute name\00"
@.str.10 = [38 x i8] c"Missing comma in packed integer value\00"
@.str.11 = [33 x i8] c"No colon in target specification\00"
@.str.12 = [35 x i8] c"Bad target in target specification\00"
@.str.13 = [37 x i8] c"No target ID in target specification\00"
@.str.14 = [38 x i8] c"Bad target ID in target specification\00"
@.str.15 = [44 x i8] c"Trailing garbage after target specification\00"
@.str.16 = [14 x i8] c"Unknown error\00"
@reltable.nv_parse_strerror = [16 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([9 x i8]* @.str to i64), i64 ptrtoint ([16 x i32]* @reltable.nv_parse_strerror to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([13 x i8]* @.str.1 to i64), i64 ptrtoint ([16 x i32]* @reltable.nv_parse_strerror to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([13 x i8]* @.str.2 to i64), i64 ptrtoint ([16 x i32]* @reltable.nv_parse_strerror to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([31 x i8]* @.str.3 to i64), i64 ptrtoint ([16 x i32]* @reltable.nv_parse_strerror to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([23 x i8]* @.str.4 to i64), i64 ptrtoint ([16 x i32]* @reltable.nv_parse_strerror to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([40 x i8]* @.str.5 to i64), i64 ptrtoint ([16 x i32]* @reltable.nv_parse_strerror to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([40 x i8]* @.str.6 to i64), i64 ptrtoint ([16 x i32]* @reltable.nv_parse_strerror to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([29 x i8]* @.str.7 to i64), i64 ptrtoint ([16 x i32]* @reltable.nv_parse_strerror to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.8 to i64), i64 ptrtoint ([16 x i32]* @reltable.nv_parse_strerror to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([28 x i8]* @.str.9 to i64), i64 ptrtoint ([16 x i32]* @reltable.nv_parse_strerror to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([38 x i8]* @.str.10 to i64), i64 ptrtoint ([16 x i32]* @reltable.nv_parse_strerror to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([33 x i8]* @.str.11 to i64), i64 ptrtoint ([16 x i32]* @reltable.nv_parse_strerror to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([35 x i8]* @.str.12 to i64), i64 ptrtoint ([16 x i32]* @reltable.nv_parse_strerror to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([37 x i8]* @.str.13 to i64), i64 ptrtoint ([16 x i32]* @reltable.nv_parse_strerror to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([38 x i8]* @.str.14 to i64), i64 ptrtoint ([16 x i32]* @reltable.nv_parse_strerror to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([44 x i8]* @.str.15 to i64), i64 ptrtoint ([16 x i32]* @reltable.nv_parse_strerror to i64)) to i32)]
define i8* @nv_parse_strerror(i32 %0) {
%2 = icmp ult i32 %0, 16
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 ([16 x i32]* @reltable.nv_parse_strerror to i8*), i64 %5)
br label %7
7: ; preds = %1, %3
%8 = phi i8* [ %6, %3 ], [ getelementptr inbounds ([14 x i8], [14 x i8]* @.str.16, i64 0, i64 0), %1 ]
ret i8* %8
}