#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 */
const char *get_region_name_AO(int region_code) {
  switch (region_code) {
  case 1:
    return "Benguela";
  case 2:
    return "Bie";
  case 3:
    return "Cabinda";
  case 4:
    return "Cuando Cubango";
  case 5:
    return "Cuanza Norte";
  case 6:
    return "Cuanza Sul";
  case 7:
    return "Cunene";
  case 8:
    return "Huambo";
  case 9:
    return "Huila";
  case 12:
    return "Malanje";
  case 13:
    return "Namibe";
  case 14:
    return "Moxico";
  case 15:
    return "Uige";
  case 16:
    return "Zaire";
  case 17:
    return "Lunda Norte";
  case 18:
    return "Lunda Sul";
  case 19:
    return "Bengo";
  case 20:
    return "Luanda";
  default:
    return NULL;
  }
}


x86 assembly (clang, -O0):
<get_region_name_AO>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,%ecx
mov    %rcx,-0x18(%rbp)
sub    $0x13,%eax
ja     1250 <get_region_name_AO+0x150>
mov    -0x18(%rbp),%rax
lea    0xed9(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xf19(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1258 <get_region_name_AO+0x158>
lea    0xf12(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1258 <get_region_name_AO+0x158>
lea    0xf06(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1258 <get_region_name_AO+0x158>
lea    0xefe(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1258 <get_region_name_AO+0x158>
lea    0xefd(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1258 <get_region_name_AO+0x158>
lea    0xefa(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1258 <get_region_name_AO+0x158>
lea    0xef5(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1258 <get_region_name_AO+0x158>
lea    0xeec(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1258 <get_region_name_AO+0x158>
lea    0xee3(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1258 <get_region_name_AO+0x158>
lea    0xed9(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1258 <get_region_name_AO+0x158>
lea    0xed1(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1258 <get_region_name_AO+0x158>
lea    0xec8(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1258 <get_region_name_AO+0x158>
lea    0xebf(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1258 <get_region_name_AO+0x158>
lea    0xeb4(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1258 <get_region_name_AO+0x158>
lea    0xeaa(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1258 <get_region_name_AO+0x158>
lea    0xea6(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1258 <get_region_name_AO+0x158>
lea    0xea0(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1258 <get_region_name_AO+0x158>
lea    0xe96(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1258 <get_region_name_AO+0x158>
movq   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<get_region_name_AO>:
add    $0xffffffff,%edi
cmp    $0x13,%edi
ja     1117 <get_region_name_AO+0x17>
movslq %edi,%rax
lea    0x2c9e(%rip),%rcx
mov    (%rcx,%rax,8),%rax
ret
xor    %eax,%eax
ret

LLVM IR (-O0):
@.str = [9 x i8] c"Benguela\00"
@.str.1 = [4 x i8] c"Bie\00"
@.str.2 = [8 x i8] c"Cabinda\00"
@.str.3 = [15 x i8] c"Cuando Cubango\00"
@.str.4 = [13 x i8] c"Cuanza Norte\00"
@.str.5 = [11 x i8] c"Cuanza Sul\00"
@.str.6 = [7 x i8] c"Cunene\00"
@.str.7 = [7 x i8] c"Huambo\00"
@.str.8 = [6 x i8] c"Huila\00"
@.str.9 = [8 x i8] c"Malanje\00"
@.str.10 = [7 x i8] c"Namibe\00"
@.str.11 = [7 x i8] c"Moxico\00"
@.str.12 = [5 x i8] c"Uige\00"
@.str.13 = [6 x i8] c"Zaire\00"
@.str.14 = [12 x i8] c"Lunda Norte\00"
@.str.15 = [10 x i8] c"Lunda Sul\00"
@.str.16 = [6 x i8] c"Bengo\00"
@.str.17 = [7 x i8] c"Luanda\00"
define i8* @get_region_name_AO(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %23 [
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 12, label %14
i32 13, label %15
i32 14, label %16
i32 15, label %17
i32 16, label %18
i32 17, label %19
i32 18, label %20
i32 19, label %21
i32 20, label %22
]
5: ; preds = %1
store i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i8** %2
br label %24
6: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %24
7: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %24
8: ; preds = %1
store i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %24
9: ; preds = %1
store i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %24
10: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %24
11: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %24
12: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.7, i64 0, i64 0), i8** %2
br label %24
13: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.8, i64 0, i64 0), i8** %2
br label %24
14: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.9, i64 0, i64 0), i8** %2
br label %24
15: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.10, i64 0, i64 0), i8** %2
br label %24
16: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.11, i64 0, i64 0), i8** %2
br label %24
17: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.12, i64 0, i64 0), i8** %2
br label %24
18: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.13, i64 0, i64 0), i8** %2
br label %24
19: ; preds = %1
store i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.14, i64 0, i64 0), i8** %2
br label %24
20: ; preds = %1
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.15, i64 0, i64 0), i8** %2
br label %24
21: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.16, i64 0, i64 0), i8** %2
br label %24
22: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.17, i64 0, i64 0), i8** %2
br label %24
23: ; preds = %1
store i8* null, i8** %2
br label %24
24: ; preds = %23, %22, %21, %20, %19, %18, %17, %16, %15, %14, %13, %12, %11, %10, %9, %8, %7, %6, %5
%25 = load i8*, i8** %2
ret i8* %25
}

LLVM IR (-O2):
@.str = [9 x i8] c"Benguela\00"
@.str.1 = [4 x i8] c"Bie\00"
@.str.2 = [8 x i8] c"Cabinda\00"
@.str.3 = [15 x i8] c"Cuando Cubango\00"
@.str.4 = [13 x i8] c"Cuanza Norte\00"
@.str.5 = [11 x i8] c"Cuanza Sul\00"
@.str.6 = [7 x i8] c"Cunene\00"
@.str.7 = [7 x i8] c"Huambo\00"
@.str.8 = [6 x i8] c"Huila\00"
@.str.9 = [8 x i8] c"Malanje\00"
@.str.10 = [7 x i8] c"Namibe\00"
@.str.11 = [7 x i8] c"Moxico\00"
@.str.12 = [5 x i8] c"Uige\00"
@.str.13 = [6 x i8] c"Zaire\00"
@.str.14 = [12 x i8] c"Lunda Norte\00"
@.str.15 = [10 x i8] c"Lunda Sul\00"
@.str.16 = [6 x i8] c"Bengo\00"
@.str.17 = [7 x i8] c"Luanda\00"
@switch.table.get_region_name_AO = [20 x i8*] [i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.2, i64 0, i64 0), i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.4, i64 0, i64 0), i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.5, i64 0, i64 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.6, i64 0, i64 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.7, i64 0, i64 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.8, i64 0, i64 0), i8* null, i8* null, i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.9, i64 0, i64 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.10, i64 0, i64 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.11, i64 0, i64 0), i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.12, i64 0, i64 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.13, i64 0, i64 0), i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.14, i64 0, i64 0), i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.15, i64 0, i64 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.16, i64 0, i64 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.17, i64 0, i64 0)]
define i8* @get_region_name_AO(i32 %0) {
%2 = add i32 %0, -1
%3 = icmp ult i32 %2, 20
br i1 %3, label %4, label %8
4: ; preds = %1
%5 = sext i32 %2 to i64
%6 = getelementptr inbounds [20 x i8*], [20 x i8*]* @switch.table.get_region_name_AO, i64 0, i64 %5
%7 = load i8*, i8** %6
br label %8
8: ; preds = %1, %4
%9 = phi i8* [ %7, %4 ], [ null, %1 ]
ret i8* %9
}