#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
int /*<<< orphan*/ printf(char *);
void month_string(int month) {
  switch (month) {
  case 1:
    printf("January");
    break;
  case 2:
    printf("February");
    break;
  case 3:
    printf("March");
    break;
  case 4:
    printf("April");
    break;
  case 5:
    printf("May");
    break;
  case 6:
    printf("June");
    break;
  case 7:
    printf("July");
    break;
  case 8:
    printf("August");
    break;
  case 9:
    printf("September");
    break;
  case 10:
    printf("October");
    break;
  case 11:
    printf("November");
    break;
  case 12:
    printf("December");
    break;
  default:
    printf("Invalid month");
    break;
  }
}


x86 assembly (clang, -O0):
<month_string>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %edi,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,%ecx
mov    %rcx,-0x10(%rbp)
sub    $0xb,%eax
ja     1210 <month_string+0x100>
mov    -0x10(%rbp),%rax
lea    0xec5(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xee5(%rip),%rdi
call   1030 <printf@plt>
jmp    121c <month_string+0x10c>
lea    0xedc(%rip),%rdi
call   1030 <printf@plt>
jmp    121c <month_string+0x10c>
lea    0xed4(%rip),%rdi
call   1030 <printf@plt>
jmp    121c <month_string+0x10c>
lea    0xec9(%rip),%rdi
call   1030 <printf@plt>
jmp    121c <month_string+0x10c>
lea    0xebe(%rip),%rdi
call   1030 <printf@plt>
jmp    121c <month_string+0x10c>
lea    0xeb1(%rip),%rdi
call   1030 <printf@plt>
jmp    121c <month_string+0x10c>
lea    0xea5(%rip),%rdi
call   1030 <printf@plt>
jmp    121c <month_string+0x10c>
lea    0xe99(%rip),%rdi
call   1030 <printf@plt>
jmp    121c <month_string+0x10c>
lea    0xe8f(%rip),%rdi
call   1030 <printf@plt>
jmp    121c <month_string+0x10c>
lea    0xe88(%rip),%rdi
call   1030 <printf@plt>
jmp    121c <month_string+0x10c>
lea    0xe7f(%rip),%rdi
call   1030 <printf@plt>
jmp    121c <month_string+0x10c>
lea    0xe77(%rip),%rdi
call   1030 <printf@plt>
jmp    121c <month_string+0x10c>
lea    0xe6f(%rip),%rdi
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<month_string>:
add    $0xffffffff,%edi
cmp    $0xb,%edi
ja     112e <month_string+0x1e>
movslq %edi,%rax
lea    0xf42(%rip),%rcx
movslq (%rcx,%rax,4),%rdi
add    %rcx,%rdi
jmp    1030 <printf@plt>
lea    0xf21(%rip),%rdi
jmp    1030 <printf@plt>

LLVM IR (-O0):
@.str = [8 x i8] c"January\00"
@.str.1 = [9 x i8] c"February\00"
@.str.2 = [6 x i8] c"March\00"
@.str.3 = [6 x i8] c"April\00"
@.str.4 = [4 x i8] c"May\00"
@.str.5 = [5 x i8] c"June\00"
@.str.6 = [5 x i8] c"July\00"
@.str.7 = [7 x i8] c"August\00"
@.str.8 = [10 x i8] c"September\00"
@.str.9 = [8 x i8] c"October\00"
@.str.10 = [9 x i8] c"November\00"
@.str.11 = [9 x i8] c"December\00"
@.str.12 = [14 x i8] c"Invalid month\00"
define void @month_string(i32 %0) {
%2 = alloca i32
store i32 %0, i32* %2
%3 = load i32, i32* %2
switch i32 %3, label %28 [
i32 1, label %4
i32 2, label %6
i32 3, label %8
i32 4, label %10
i32 5, label %12
i32 6, label %14
i32 7, label %16
i32 8, label %18
i32 9, label %20
i32 10, label %22
i32 11, label %24
i32 12, label %26
]
4: ; preds = %1
%5 = call i32 @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0))
br label %30
6: ; preds = %1
%7 = call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0))
br label %30
8: ; preds = %1
%9 = call i32 @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0))
br label %30
10: ; preds = %1
%11 = call i32 @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.3, i64 0, i64 0))
br label %30
12: ; preds = %1
%13 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0))
br label %30
14: ; preds = %1
%15 = call i32 @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.5, i64 0, i64 0))
br label %30
16: ; preds = %1
%17 = call i32 @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.6, i64 0, i64 0))
br label %30
18: ; preds = %1
%19 = call i32 @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.7, i64 0, i64 0))
br label %30
20: ; preds = %1
%21 = call i32 @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.8, i64 0, i64 0))
br label %30
22: ; preds = %1
%23 = call i32 @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.9, i64 0, i64 0))
br label %30
24: ; preds = %1
%25 = call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.10, i64 0, i64 0))
br label %30
26: ; preds = %1
%27 = call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.11, i64 0, i64 0))
br label %30
28: ; preds = %1
%29 = call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.12, i64 0, i64 0))
br label %30
30: ; preds = %28, %26, %24, %22, %20, %18, %16, %14, %12, %10, %8, %6, %4
ret void
}

LLVM IR (-O2):
@.str = [8 x i8] c"January\00"
@.str.1 = [9 x i8] c"February\00"
@.str.2 = [6 x i8] c"March\00"
@.str.3 = [6 x i8] c"April\00"
@.str.4 = [4 x i8] c"May\00"
@.str.5 = [5 x i8] c"June\00"
@.str.6 = [5 x i8] c"July\00"
@.str.7 = [7 x i8] c"August\00"
@.str.8 = [10 x i8] c"September\00"
@.str.9 = [8 x i8] c"October\00"
@.str.10 = [9 x i8] c"November\00"
@.str.11 = [9 x i8] c"December\00"
@.str.12 = [14 x i8] c"Invalid month\00"
@reltable.month_string = [12 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str to i64), i64 ptrtoint ([12 x i32]* @reltable.month_string to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([9 x i8]* @.str.1 to i64), i64 ptrtoint ([12 x i32]* @reltable.month_string to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([6 x i8]* @.str.2 to i64), i64 ptrtoint ([12 x i32]* @reltable.month_string to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([6 x i8]* @.str.3 to i64), i64 ptrtoint ([12 x i32]* @reltable.month_string to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.4 to i64), i64 ptrtoint ([12 x i32]* @reltable.month_string to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.5 to i64), i64 ptrtoint ([12 x i32]* @reltable.month_string to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.6 to i64), i64 ptrtoint ([12 x i32]* @reltable.month_string to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([7 x i8]* @.str.7 to i64), i64 ptrtoint ([12 x i32]* @reltable.month_string to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([10 x i8]* @.str.8 to i64), i64 ptrtoint ([12 x i32]* @reltable.month_string to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.9 to i64), i64 ptrtoint ([12 x i32]* @reltable.month_string to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([9 x i8]* @.str.10 to i64), i64 ptrtoint ([12 x i32]* @reltable.month_string to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([9 x i8]* @.str.11 to i64), i64 ptrtoint ([12 x i32]* @reltable.month_string to i64)) to i32)]
define void @month_string(i32 %0) {
%2 = add i32 %0, -1
%3 = icmp ult i32 %2, 12
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 ([12 x i32]* @reltable.month_string to i8*), i64 %6)
br label %8
8: ; preds = %1, %4
%9 = phi i8* [ %7, %4 ], [ getelementptr inbounds ([14 x i8], [14 x i8]* @.str.12, i64 0, i64 0), %1 ]
%10 = tail call i32 @printf(i8* dereferenceable(1) %9)
ret void
}