char *packetCommandToText(int command) {
  switch (command) {
  case 0x00:
    return "ping";
  case 0x01:
    return "acknowledge ping";
  case 0x02:
    return "return success";
  case 0x03:
    return "return failure";
  case 0x04:
    return "create new wallet";
  case 0x05:
    return "create new address in wallet";
  case 0x06:
    return "get number of addresses";
  case 0x09:
    return "get address and public key";
  case 0x0a:
    return "sign transaction";
  case 0x0b:
    return "load wallet";
  case 0x0c:
    return "unload wallet";
  case 0x0d:
    return "format storage";
  case 0x0e:
    return "change encryption key";
  case 0x0f:
    return "change name";
  case 0x10:
    return "list wallets";
  default:
    return "unknown";
  }
}


x86 assembly (clang, -O0):
<packetCommandToText>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
mov    %rax,-0x18(%rbp)
sub    $0x10,%rax
ja     121c <packetCommandToText+0x11c>
mov    -0x18(%rbp),%rax
lea    0xedd(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xf1d(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1227 <packetCommandToText+0x127>
lea    0xf01(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1227 <packetCommandToText+0x127>
lea    0xf02(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1227 <packetCommandToText+0x127>
lea    0xf01(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1227 <packetCommandToText+0x127>
lea    0xf00(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1227 <packetCommandToText+0x127>
lea    0xf02(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1227 <packetCommandToText+0x127>
lea    0xf0f(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1227 <packetCommandToText+0x127>
lea    0xf17(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1227 <packetCommandToText+0x127>
lea    0xf22(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1227 <packetCommandToText+0x127>
lea    0xf25(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1227 <packetCommandToText+0x127>
lea    0xf13(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1227 <packetCommandToText+0x127>
lea    0xf11(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1227 <packetCommandToText+0x127>
lea    0xf10(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1227 <packetCommandToText+0x127>
lea    0xf16(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1227 <packetCommandToText+0x127>
lea    0xf12(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1227 <packetCommandToText+0x127>
lea    0xf0f(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<packetCommandToText>:
cmp    $0x10,%edi
ja     1117 <packetCommandToText+0x17>
movslq %edi,%rax
lea    0xfe9(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xfd0(%rip),%rax
ret

LLVM IR (-O0):
@.str = [5 x i8] c"ping\00"
@.str.1 = [17 x i8] c"acknowledge ping\00"
@.str.2 = [15 x i8] c"return success\00"
@.str.3 = [15 x i8] c"return failure\00"
@.str.4 = [18 x i8] c"create new wallet\00"
@.str.5 = [29 x i8] c"create new address in wallet\00"
@.str.6 = [24 x i8] c"get number of addresses\00"
@.str.7 = [27 x i8] c"get address and public key\00"
@.str.8 = [17 x i8] c"sign transaction\00"
@.str.9 = [12 x i8] c"load wallet\00"
@.str.10 = [14 x i8] c"unload wallet\00"
@.str.11 = [15 x i8] c"format storage\00"
@.str.12 = [22 x i8] c"change encryption key\00"
@.str.13 = [12 x i8] c"change name\00"
@.str.14 = [13 x i8] c"list wallets\00"
@.str.15 = [8 x i8] c"unknown\00"
define i8* @packetCommandToText(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %20 [
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 9, label %12
i32 10, label %13
i32 11, label %14
i32 12, label %15
i32 13, label %16
i32 14, label %17
i32 15, label %18
i32 16, label %19
]
5: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8** %2
br label %21
6: ; preds = %1
store i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %21
7: ; preds = %1
store i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %21
8: ; preds = %1
store i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %21
9: ; preds = %1
store i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %21
10: ; preds = %1
store i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %21
11: ; preds = %1
store i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %21
12: ; preds = %1
store i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.7, i64 0, i64 0), i8** %2
br label %21
13: ; preds = %1
store i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.8, i64 0, i64 0), i8** %2
br label %21
14: ; preds = %1
store i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.9, i64 0, i64 0), i8** %2
br label %21
15: ; preds = %1
store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.10, i64 0, i64 0), i8** %2
br label %21
16: ; preds = %1
store i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.11, i64 0, i64 0), i8** %2
br label %21
17: ; preds = %1
store i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.12, i64 0, i64 0), i8** %2
br label %21
18: ; preds = %1
store i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.13, i64 0, i64 0), i8** %2
br label %21
19: ; preds = %1
store i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.14, i64 0, i64 0), i8** %2
br label %21
20: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.15, i64 0, i64 0), i8** %2
br label %21
21: ; preds = %20, %19, %18, %17, %16, %15, %14, %13, %12, %11, %10, %9, %8, %7, %6, %5
%22 = load i8*, i8** %2
ret i8* %22
}

LLVM IR (-O2):
@.str = [5 x i8] c"ping\00"
@.str.1 = [17 x i8] c"acknowledge ping\00"
@.str.2 = [15 x i8] c"return success\00"
@.str.3 = [15 x i8] c"return failure\00"
@.str.4 = [18 x i8] c"create new wallet\00"
@.str.5 = [29 x i8] c"create new address in wallet\00"
@.str.6 = [24 x i8] c"get number of addresses\00"
@.str.7 = [27 x i8] c"get address and public key\00"
@.str.8 = [17 x i8] c"sign transaction\00"
@.str.9 = [12 x i8] c"load wallet\00"
@.str.10 = [14 x i8] c"unload wallet\00"
@.str.11 = [15 x i8] c"format storage\00"
@.str.12 = [22 x i8] c"change encryption key\00"
@.str.13 = [12 x i8] c"change name\00"
@.str.14 = [13 x i8] c"list wallets\00"
@.str.15 = [8 x i8] c"unknown\00"
@reltable.packetCommandToText = [17 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str to i64), i64 ptrtoint ([17 x i32]* @reltable.packetCommandToText to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.1 to i64), i64 ptrtoint ([17 x i32]* @reltable.packetCommandToText to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([15 x i8]* @.str.2 to i64), i64 ptrtoint ([17 x i32]* @reltable.packetCommandToText to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([15 x i8]* @.str.3 to i64), i64 ptrtoint ([17 x i32]* @reltable.packetCommandToText to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([18 x i8]* @.str.4 to i64), i64 ptrtoint ([17 x i32]* @reltable.packetCommandToText to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([29 x i8]* @.str.5 to i64), i64 ptrtoint ([17 x i32]* @reltable.packetCommandToText to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([24 x i8]* @.str.6 to i64), i64 ptrtoint ([17 x i32]* @reltable.packetCommandToText to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.15 to i64), i64 ptrtoint ([17 x i32]* @reltable.packetCommandToText to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.15 to i64), i64 ptrtoint ([17 x i32]* @reltable.packetCommandToText to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([27 x i8]* @.str.7 to i64), i64 ptrtoint ([17 x i32]* @reltable.packetCommandToText to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.8 to i64), i64 ptrtoint ([17 x i32]* @reltable.packetCommandToText to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([12 x i8]* @.str.9 to i64), i64 ptrtoint ([17 x i32]* @reltable.packetCommandToText to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([14 x i8]* @.str.10 to i64), i64 ptrtoint ([17 x i32]* @reltable.packetCommandToText to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([15 x i8]* @.str.11 to i64), i64 ptrtoint ([17 x i32]* @reltable.packetCommandToText to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([22 x i8]* @.str.12 to i64), i64 ptrtoint ([17 x i32]* @reltable.packetCommandToText to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([12 x i8]* @.str.13 to i64), i64 ptrtoint ([17 x i32]* @reltable.packetCommandToText to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([13 x i8]* @.str.14 to i64), i64 ptrtoint ([17 x i32]* @reltable.packetCommandToText to i64)) to i32)]
define i8* @packetCommandToText(i32 %0) {
%2 = icmp ult i32 %0, 17
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 ([17 x i32]* @reltable.packetCommandToText to i8*), i64 %5)
br label %7
7: ; preds = %1, %3
%8 = phi i8* [ %6, %3 ], [ getelementptr inbounds ([8 x i8], [8 x i8]* @.str.15, i64 0, i64 0), %1 ]
ret i8* %8
}