char *getNombreMes(int num) {
  char *mes;
  switch (num) {
  case 1:
    mes = "ENERO";
    break;
  case 2:
    mes = "FEBRERO";
    break;
  case 3:
    mes = "MARZO";
    break;
  case 4:
    mes = "ABRIL";
    break;
  case 5:
    mes = "MAYO";
    break;
  case 6:
    mes = "JUNIO";
    break;
  case 7:
    mes = "JULIO";
    break;
  case 8:
    mes = "AGOSTO";
    break;
  case 9:
    mes = "SEPTIEMBRE";
    break;
  case 10:
    mes = "OCTUBRE";
    break;
  case 11:
    mes = "NOVIEMBRE";
    break;
  case 12:
    mes = "DICIEMBRE";
    break;
  }
  return mes;
}


x86 assembly (clang, -O0):
<getNombreMes>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,%ecx
mov    %rcx,-0x18(%rbp)
sub    $0xb,%eax
ja     11eb <getNombreMes+0xeb>
mov    -0x18(%rbp),%rax
lea    0xed9(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xef9(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11eb <getNombreMes+0xeb>
lea    0xeef(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11eb <getNombreMes+0xeb>
lea    0xee7(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11eb <getNombreMes+0xeb>
lea    0xedd(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11eb <getNombreMes+0xeb>
lea    0xed3(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11eb <getNombreMes+0xeb>
lea    0xec8(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11eb <getNombreMes+0xeb>
lea    0xebe(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11eb <getNombreMes+0xeb>
lea    0xeb4(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11eb <getNombreMes+0xeb>
lea    0xeab(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11eb <getNombreMes+0xeb>
lea    0xea6(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11eb <getNombreMes+0xeb>
lea    0xe9e(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11eb <getNombreMes+0xeb>
lea    0xe98(%rip),%rax
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<getNombreMes>:
add    $0xfffffffe,%edi
cmp    $0xa,%edi
ja     111a <getNombreMes+0x1a>
movslq %edi,%rax
lea    0xf4a(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xedf(%rip),%rax
ret

LLVM IR (-O0):
@.str = [6 x i8] c"ENERO\00"
@.str.1 = [8 x i8] c"FEBRERO\00"
@.str.2 = [6 x i8] c"MARZO\00"
@.str.3 = [6 x i8] c"ABRIL\00"
@.str.4 = [5 x i8] c"MAYO\00"
@.str.5 = [6 x i8] c"JUNIO\00"
@.str.6 = [6 x i8] c"JULIO\00"
@.str.7 = [7 x i8] c"AGOSTO\00"
@.str.8 = [11 x i8] c"SEPTIEMBRE\00"
@.str.9 = [8 x i8] c"OCTUBRE\00"
@.str.10 = [10 x i8] c"NOVIEMBRE\00"
@.str.11 = [10 x i8] c"DICIEMBRE\00"
define i8* @getNombreMes(i32 %0) {
%2 = alloca i32
%3 = alloca i8*
store i32 %0, i32* %2
%4 = load i32, i32* %2
switch i32 %4, label %17 [
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
i32 9, label %13
i32 10, label %14
i32 11, label %15
i32 12, label %16
]
5: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i8** %3
br label %17
6: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0), i8** %3
br label %17
7: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i8** %3
br label %17
8: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.3, i64 0, i64 0), i8** %3
br label %17
9: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.4, i64 0, i64 0), i8** %3
br label %17
10: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.5, i64 0, i64 0), i8** %3
br label %17
11: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.6, i64 0, i64 0), i8** %3
br label %17
12: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.7, i64 0, i64 0), i8** %3
br label %17
13: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.8, i64 0, i64 0), i8** %3
br label %17
14: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.9, i64 0, i64 0), i8** %3
br label %17
15: ; preds = %1
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.10, i64 0, i64 0), i8** %3
br label %17
16: ; preds = %1
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.11, i64 0, i64 0), i8** %3
br label %17
17: ; preds = %1, %16, %15, %14, %13, %12, %11, %10, %9, %8, %7, %6, %5
%18 = load i8*, i8** %3
ret i8* %18
}

LLVM IR (-O2):
@.str = [6 x i8] c"ENERO\00"
@.str.1 = [8 x i8] c"FEBRERO\00"
@.str.2 = [6 x i8] c"MARZO\00"
@.str.3 = [6 x i8] c"ABRIL\00"
@.str.4 = [5 x i8] c"MAYO\00"
@.str.5 = [6 x i8] c"JUNIO\00"
@.str.6 = [6 x i8] c"JULIO\00"
@.str.7 = [7 x i8] c"AGOSTO\00"
@.str.8 = [11 x i8] c"SEPTIEMBRE\00"
@.str.9 = [8 x i8] c"OCTUBRE\00"
@.str.10 = [10 x i8] c"NOVIEMBRE\00"
@.str.11 = [10 x i8] c"DICIEMBRE\00"
@reltable.getNombreMes = [11 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.1 to i64), i64 ptrtoint ([11 x i32]* @reltable.getNombreMes to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([6 x i8]* @.str.2 to i64), i64 ptrtoint ([11 x i32]* @reltable.getNombreMes to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([6 x i8]* @.str.3 to i64), i64 ptrtoint ([11 x i32]* @reltable.getNombreMes to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.4 to i64), i64 ptrtoint ([11 x i32]* @reltable.getNombreMes to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([6 x i8]* @.str.5 to i64), i64 ptrtoint ([11 x i32]* @reltable.getNombreMes to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([6 x i8]* @.str.6 to i64), i64 ptrtoint ([11 x i32]* @reltable.getNombreMes to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([7 x i8]* @.str.7 to i64), i64 ptrtoint ([11 x i32]* @reltable.getNombreMes to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([11 x i8]* @.str.8 to i64), i64 ptrtoint ([11 x i32]* @reltable.getNombreMes to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.9 to i64), i64 ptrtoint ([11 x i32]* @reltable.getNombreMes to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([10 x i8]* @.str.10 to i64), i64 ptrtoint ([11 x i32]* @reltable.getNombreMes to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([10 x i8]* @.str.11 to i64), i64 ptrtoint ([11 x i32]* @reltable.getNombreMes to i64)) to i32)]
define i8* @getNombreMes(i32 %0) {
%2 = add i32 %0, -2
%3 = icmp ult i32 %2, 11
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 ([11 x i32]* @reltable.getNombreMes to i8*), i64 %6)
br label %8
8: ; preds = %4, %1
%9 = phi i8* [ getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), %1 ], [ %7, %4 ]
ret i8* %9
}