char *toString(int n) {
  char *tipo = "";
  switch (n) {
  case 0:
    tipo = "entero";
    break;
  case 1:
    tipo = "real";
    break;
  case 2:
    tipo = "caracter";
    break;
  case 3:
    tipo = "booleano";
    break;
  case 4:
    tipo = "lista";
    break;
  case 5:
    tipo = "desconocido";
    break;
  case 6:
    tipo = "no asignado";
    break;
  }
  return (tipo);
}


x86 assembly (clang, -O0):
<toString>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0x4(%rbp)
lea    0xf31(%rip),%rax
mov    %rax,-0x10(%rbp)
mov    -0x4(%rbp),%eax
mov    %rax,-0x18(%rbp)
sub    $0x6,%rax
ja     11a2 <toString+0xa2>
mov    -0x18(%rbp),%rax
lea    0xed2(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xede(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11a2 <toString+0xa2>
lea    0xed5(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11a2 <toString+0xa2>
lea    0xeca(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11a2 <toString+0xa2>
lea    0xec3(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11a2 <toString+0xa2>
lea    0xebc(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11a2 <toString+0xa2>
lea    0xeb2(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11a2 <toString+0xa2>
lea    0xeae(%rip),%rax
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<toString>:
cmp    $0x6,%edi
ja     1117 <toString+0x17>
movslq %edi,%rax
lea    0xf2d(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xf05(%rip),%rax
ret

LLVM IR (-O0):
@.str = [1 x i8] zeroinitializer
@.str.1 = [7 x i8] c"entero\00"
@.str.2 = [5 x i8] c"real\00"
@.str.3 = [9 x i8] c"caracter\00"
@.str.4 = [9 x i8] c"booleano\00"
@.str.5 = [6 x i8] c"lista\00"
@.str.6 = [12 x i8] c"desconocido\00"
@.str.7 = [12 x i8] c"no asignado\00"
define i8* @toString(i32 %0) {
%2 = alloca i32
%3 = alloca i8*
store i32 %0, i32* %2
store i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str, i64 0, i64 0), i8** %3
%4 = load i32, i32* %2
switch i32 %4, label %12 [
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
]
5: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), i8** %3
br label %12
6: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0), i8** %3
br label %12
7: ; preds = %1
store i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.3, i64 0, i64 0), i8** %3
br label %12
8: ; preds = %1
store i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.4, i64 0, i64 0), i8** %3
br label %12
9: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.5, i64 0, i64 0), i8** %3
br label %12
10: ; preds = %1
store i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.6, i64 0, i64 0), i8** %3
br label %12
11: ; preds = %1
store i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.7, i64 0, i64 0), i8** %3
br label %12
12: ; preds = %1, %11, %10, %9, %8, %7, %6, %5
%13 = load i8*, i8** %3
ret i8* %13
}

LLVM IR (-O2):
@.str = [1 x i8] zeroinitializer
@.str.1 = [7 x i8] c"entero\00"
@.str.2 = [5 x i8] c"real\00"
@.str.3 = [9 x i8] c"caracter\00"
@.str.4 = [9 x i8] c"booleano\00"
@.str.5 = [6 x i8] c"lista\00"
@.str.6 = [12 x i8] c"desconocido\00"
@.str.7 = [12 x i8] c"no asignado\00"
@reltable.toString = [7 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([7 x i8]* @.str.1 to i64), i64 ptrtoint ([7 x i32]* @reltable.toString to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.2 to i64), i64 ptrtoint ([7 x i32]* @reltable.toString to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([9 x i8]* @.str.3 to i64), i64 ptrtoint ([7 x i32]* @reltable.toString to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([9 x i8]* @.str.4 to i64), i64 ptrtoint ([7 x i32]* @reltable.toString to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([6 x i8]* @.str.5 to i64), i64 ptrtoint ([7 x i32]* @reltable.toString to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([12 x i8]* @.str.6 to i64), i64 ptrtoint ([7 x i32]* @reltable.toString to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([12 x i8]* @.str.7 to i64), i64 ptrtoint ([7 x i32]* @reltable.toString to i64)) to i32)]
define i8* @toString(i32 %0) {
%2 = icmp ult i32 %0, 7
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 ([7 x i32]* @reltable.toString to i8*), i64 %5)
br label %7
7: ; preds = %3, %1
%8 = phi i8* [ getelementptr inbounds ([1 x i8], [1 x i8]* @.str, i64 0, i64 0), %1 ], [ %6, %3 ]
ret i8* %8
}