#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_KH(int region_code) {
  switch (region_code) {
  case 1:
    return "Batdambang";
  case 2:
    return "Kampong Cham";
  case 3:
    return "Kampong Chhnang";
  case 4:
    return "Kampong Speu";
  case 5:
    return "Kampong Thum";
  case 6:
    return "Kampot";
  case 7:
    return "Kandal";
  case 8:
    return "Koh Kong";
  case 9:
    return "Kracheh";
  case 10:
    return "Mondulkiri";
  case 11:
    return "Phnum Penh";
  case 12:
    return "Pursat";
  case 13:
    return "Preah Vihear";
  case 14:
    return "Prey Veng";
  case 15:
    return "Ratanakiri Kiri";
  case 16:
    return "Siem Reap";
  case 17:
    return "Stung Treng";
  case 18:
    return "Svay Rieng";
  case 19:
    return "Takeo";
  case 22:
    return "Phnum Penh";
  case 23:
    return "Ratanakiri";
  case 25:
    return "Banteay Meanchey";
  case 28:
    return "Preah Seihanu";
  case 29:
    return "Batdambang";
  case 30:
    return "Pailin";
  default:
    return NULL;
  }
}


x86 assembly (clang, -O0):
<get_region_name_KH>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,%ecx
mov    %rcx,-0x18(%rbp)
sub    $0x1d,%eax
ja     12c0 <get_region_name_KH+0x1c0>
mov    -0x18(%rbp),%rax
lea    0xed9(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xf41(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xf3c(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xf39(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xf39(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xf36(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xf33(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xf2a(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xf21(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xf1a(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xf12(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xf0d(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xf08(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xeff(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xefc(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xef6(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xef6(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xef0(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xeec(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xee7(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xe7d(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xecd(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xec8(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xec9(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xdd1(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
lea    0xeb7(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    12c8 <get_region_name_KH+0x1c8>
movq   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<get_region_name_KH>:
add    $0xffffffff,%edi
cmp    $0x1d,%edi
ja     1117 <get_region_name_KH+0x17>
movslq %edi,%rax
lea    0x2c4e(%rip),%rcx
mov    (%rcx,%rax,8),%rax
ret
xor    %eax,%eax
ret

LLVM IR (-O0):
@.str = [11 x i8] c"Batdambang\00"
@.str.1 = [13 x i8] c"Kampong Cham\00"
@.str.2 = [16 x i8] c"Kampong Chhnang\00"
@.str.3 = [13 x i8] c"Kampong Speu\00"
@.str.4 = [13 x i8] c"Kampong Thum\00"
@.str.5 = [7 x i8] c"Kampot\00"
@.str.6 = [7 x i8] c"Kandal\00"
@.str.7 = [9 x i8] c"Koh Kong\00"
@.str.8 = [8 x i8] c"Kracheh\00"
@.str.9 = [11 x i8] c"Mondulkiri\00"
@.str.10 = [11 x i8] c"Phnum Penh\00"
@.str.11 = [7 x i8] c"Pursat\00"
@.str.12 = [13 x i8] c"Preah Vihear\00"
@.str.13 = [10 x i8] c"Prey Veng\00"
@.str.14 = [16 x i8] c"Ratanakiri Kiri\00"
@.str.15 = [10 x i8] c"Siem Reap\00"
@.str.16 = [12 x i8] c"Stung Treng\00"
@.str.17 = [11 x i8] c"Svay Rieng\00"
@.str.18 = [6 x i8] c"Takeo\00"
@.str.19 = [11 x i8] c"Ratanakiri\00"
@.str.20 = [17 x i8] c"Banteay Meanchey\00"
@.str.21 = [14 x i8] c"Preah Seihanu\00"
@.str.22 = [7 x i8] c"Pailin\00"
define i8* @get_region_name_KH(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %30 [
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
i32 13, label %17
i32 14, label %18
i32 15, label %19
i32 16, label %20
i32 17, label %21
i32 18, label %22
i32 19, label %23
i32 22, label %24
i32 23, label %25
i32 25, label %26
i32 28, label %27
i32 29, label %28
i32 30, label %29
]
5: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i8** %2
br label %31
6: ; preds = %1
store i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %31
7: ; preds = %1
store i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %31
8: ; preds = %1
store i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %31
9: ; preds = %1
store i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %31
10: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %31
11: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %31
12: ; preds = %1
store i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.7, i64 0, i64 0), i8** %2
br label %31
13: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.8, i64 0, i64 0), i8** %2
br label %31
14: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.9, i64 0, i64 0), i8** %2
br label %31
15: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.10, i64 0, i64 0), i8** %2
br label %31
16: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.11, i64 0, i64 0), i8** %2
br label %31
17: ; preds = %1
store i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.12, i64 0, i64 0), i8** %2
br label %31
18: ; preds = %1
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.13, i64 0, i64 0), i8** %2
br label %31
19: ; preds = %1
store i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.14, i64 0, i64 0), i8** %2
br label %31
20: ; preds = %1
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.15, i64 0, i64 0), i8** %2
br label %31
21: ; preds = %1
store i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.16, i64 0, i64 0), i8** %2
br label %31
22: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.17, i64 0, i64 0), i8** %2
br label %31
23: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.18, i64 0, i64 0), i8** %2
br label %31
24: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.10, i64 0, i64 0), i8** %2
br label %31
25: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.19, i64 0, i64 0), i8** %2
br label %31
26: ; preds = %1
store i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.20, i64 0, i64 0), i8** %2
br label %31
27: ; preds = %1
store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.21, i64 0, i64 0), i8** %2
br label %31
28: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i8** %2
br label %31
29: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.22, i64 0, i64 0), i8** %2
br label %31
30: ; preds = %1
store i8* null, i8** %2
br label %31
31: ; preds = %30, %29, %28, %27, %26, %25, %24, %23, %22, %21, %20, %19, %18, %17, %16, %15, %14, %13, %12, %11, %10, %9, %8, %7, %6, %5
%32 = load i8*, i8** %2
ret i8* %32
}

LLVM IR (-O2):
@.str = [11 x i8] c"Batdambang\00"
@.str.1 = [13 x i8] c"Kampong Cham\00"
@.str.2 = [16 x i8] c"Kampong Chhnang\00"
@.str.3 = [13 x i8] c"Kampong Speu\00"
@.str.4 = [13 x i8] c"Kampong Thum\00"
@.str.5 = [7 x i8] c"Kampot\00"
@.str.6 = [7 x i8] c"Kandal\00"
@.str.7 = [9 x i8] c"Koh Kong\00"
@.str.8 = [8 x i8] c"Kracheh\00"
@.str.9 = [11 x i8] c"Mondulkiri\00"
@.str.10 = [11 x i8] c"Phnum Penh\00"
@.str.11 = [7 x i8] c"Pursat\00"
@.str.12 = [13 x i8] c"Preah Vihear\00"
@.str.13 = [10 x i8] c"Prey Veng\00"
@.str.14 = [16 x i8] c"Ratanakiri Kiri\00"
@.str.15 = [10 x i8] c"Siem Reap\00"
@.str.16 = [12 x i8] c"Stung Treng\00"
@.str.17 = [11 x i8] c"Svay Rieng\00"
@.str.18 = [6 x i8] c"Takeo\00"
@.str.19 = [11 x i8] c"Ratanakiri\00"
@.str.20 = [17 x i8] c"Banteay Meanchey\00"
@.str.21 = [14 x i8] c"Preah Seihanu\00"
@.str.22 = [7 x i8] c"Pailin\00"
@switch.table.get_region_name_KH = [30 x i8*] [i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.2, i64 0, i64 0), i8* getelementptr inbounds ([13 x i8], [13 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 ([7 x i8], [7 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 ([9 x i8], [9 x i8]* @.str.7, i64 0, i64 0), i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.8, i64 0, i64 0), i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.9, i64 0, i64 0), i8* getelementptr inbounds ([11 x i8], [11 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 ([13 x i8], [13 x i8]* @.str.12, i64 0, i64 0), i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.13, i64 0, i64 0), i8* getelementptr inbounds ([16 x i8], [16 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 ([12 x i8], [12 x i8]* @.str.16, i64 0, i64 0), i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.17, i64 0, i64 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.18, i64 0, i64 0), i8* null, i8* null, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.10, i64 0, i64 0), i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.19, i64 0, i64 0), i8* null, i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.20, i64 0, i64 0), i8* null, i8* null, i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.21, i64 0, i64 0), i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.22, i64 0, i64 0)]
define i8* @get_region_name_KH(i32 %0) {
%2 = add i32 %0, -1
%3 = icmp ult i32 %2, 30
br i1 %3, label %4, label %8
4: ; preds = %1
%5 = sext i32 %2 to i64
%6 = getelementptr inbounds [30 x i8*], [30 x i8*]* @switch.table.get_region_name_KH, 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
}