char *PacketTypeName(int type) {
  char *typeName = "<unknown>";
  switch (type) {
  case 1:
    typeName = "VM_INIT";
    break;
  case 2:
    typeName = "CACHE_INIT";
    break;
  case 3:
    typeName = "FLASH_WRITE";
    break;
  case 4:
    typeName = "RAM_WRITE";
    break;
  case 5:
    typeName = "HUB_WRITE";
    break;
  case 6:
    typeName = "DATA";
    break;
  case 7:
    typeName = "EOF";
    break;
  case 8:
    typeName = "RUN";
    break;
  }
  return typeName;
}


x86 assembly (clang, -O0):
<PacketTypeName>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0x4(%rbp)
lea    0xf12(%rip),%rax
mov    %rax,-0x10(%rbp)
mov    -0x4(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,%ecx
mov    %rcx,-0x18(%rbp)
sub    $0x7,%eax
ja     11b6 <PacketTypeName+0xb6>
mov    -0x18(%rbp),%rax
lea    0xece(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xee8(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11b6 <PacketTypeName+0xb6>
lea    0xee0(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11b6 <PacketTypeName+0xb6>
lea    0xedb(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11b6 <PacketTypeName+0xb6>
lea    0xed7(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11b6 <PacketTypeName+0xb6>
lea    0xed1(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11b6 <PacketTypeName+0xb6>
lea    0xecb(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11b6 <PacketTypeName+0xb6>
lea    0xec0(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11b6 <PacketTypeName+0xb6>
lea    0xeb4(%rip),%rax
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<PacketTypeName>:
add    $0xffffffff,%edi
cmp    $0x7,%edi
ja     111a <PacketTypeName+0x1a>
movslq %edi,%rax
lea    0xf3a(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xedf(%rip),%rax
ret

LLVM IR (-O0):
@.str = [10 x i8] c"<unknown>\00"
@.str.1 = [8 x i8] c"VM_INIT\00"
@.str.2 = [11 x i8] c"CACHE_INIT\00"
@.str.3 = [12 x i8] c"FLASH_WRITE\00"
@.str.4 = [10 x i8] c"RAM_WRITE\00"
@.str.5 = [10 x i8] c"HUB_WRITE\00"
@.str.6 = [5 x i8] c"DATA\00"
@.str.7 = [4 x i8] c"EOF\00"
@.str.8 = [4 x i8] c"RUN\00"
define i8* @PacketTypeName(i32 %0) {
%2 = alloca i32
%3 = alloca i8*
store i32 %0, i32* %2
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0), i8** %3
%4 = load i32, i32* %2
switch i32 %4, label %13 [
i32 1, label %5
i32 2, label %6
i32 3, label %7
i32 4, label %8
i32 5, label %9
i32 6, label %10
i32 7, label %11
i32 8, label %12
]
5: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0), i8** %3
br label %13
6: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i8** %3
br label %13
7: ; preds = %1
store i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.3, i64 0, i64 0), i8** %3
br label %13
8: ; preds = %1
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.4, i64 0, i64 0), i8** %3
br label %13
9: ; preds = %1
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.5, i64 0, i64 0), i8** %3
br label %13
10: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.6, i64 0, i64 0), i8** %3
br label %13
11: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.7, i64 0, i64 0), i8** %3
br label %13
12: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.8, i64 0, i64 0), i8** %3
br label %13
13: ; preds = %1, %12, %11, %10, %9, %8, %7, %6, %5
%14 = load i8*, i8** %3
ret i8* %14
}

LLVM IR (-O2):
@.str = [10 x i8] c"<unknown>\00"
@.str.1 = [8 x i8] c"VM_INIT\00"
@.str.2 = [11 x i8] c"CACHE_INIT\00"
@.str.3 = [12 x i8] c"FLASH_WRITE\00"
@.str.4 = [10 x i8] c"RAM_WRITE\00"
@.str.5 = [10 x i8] c"HUB_WRITE\00"
@.str.6 = [5 x i8] c"DATA\00"
@.str.7 = [4 x i8] c"EOF\00"
@.str.8 = [4 x i8] c"RUN\00"
@reltable.PacketTypeName = [8 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.1 to i64), i64 ptrtoint ([8 x i32]* @reltable.PacketTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([11 x i8]* @.str.2 to i64), i64 ptrtoint ([8 x i32]* @reltable.PacketTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([12 x i8]* @.str.3 to i64), i64 ptrtoint ([8 x i32]* @reltable.PacketTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([10 x i8]* @.str.4 to i64), i64 ptrtoint ([8 x i32]* @reltable.PacketTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([10 x i8]* @.str.5 to i64), i64 ptrtoint ([8 x i32]* @reltable.PacketTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.6 to i64), i64 ptrtoint ([8 x i32]* @reltable.PacketTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.7 to i64), i64 ptrtoint ([8 x i32]* @reltable.PacketTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.8 to i64), i64 ptrtoint ([8 x i32]* @reltable.PacketTypeName to i64)) to i32)]
define i8* @PacketTypeName(i32 %0) {
%2 = add i32 %0, -1
%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.PacketTypeName to i8*), i64 %6)
br label %8
8: ; preds = %4, %1
%9 = phi i8* [ getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0), %1 ], [ %7, %4 ]
ret i8* %9
}