#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_BW(int region_code) {
  switch (region_code) {
  case 1:
    return "Central";
  case 3:
    return "Ghanzi";
  case 4:
    return "Kgalagadi";
  case 5:
    return "Kgatleng";
  case 6:
    return "Kweneng";
  case 8:
    return "North-East";
  case 9:
    return "South-East";
  case 10:
    return "Southern";
  case 11:
    return "North-West";
  default:
    return NULL;
  }
}


x86 assembly (clang, -O0):
<get_region_name_BW>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,%ecx
mov    %rcx,-0x18(%rbp)
sub    $0xa,%eax
ja     11c0 <get_region_name_BW+0xc0>
mov    -0x18(%rbp),%rax
lea    0xed9(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xef5(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11c8 <get_region_name_BW+0xc8>
lea    0xeed(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11c8 <get_region_name_BW+0xc8>
lea    0xee4(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11c8 <get_region_name_BW+0xc8>
lea    0xede(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11c8 <get_region_name_BW+0xc8>
lea    0xed7(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11c8 <get_region_name_BW+0xc8>
lea    0xecf(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11c8 <get_region_name_BW+0xc8>
lea    0xeca(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11c8 <get_region_name_BW+0xc8>
lea    0xec5(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11c8 <get_region_name_BW+0xc8>
lea    0xebe(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11c8 <get_region_name_BW+0xc8>
movq   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<get_region_name_BW>:
add    $0xffffffff,%edi
cmp    $0xa,%edi
ja     1117 <get_region_name_BW+0x17>
movslq %edi,%rax
lea    0x2ce6(%rip),%rcx
mov    (%rcx,%rax,8),%rax
ret
xor    %eax,%eax
ret

LLVM IR (-O0):
@.str = [8 x i8] c"Central\00"
@.str.1 = [7 x i8] c"Ghanzi\00"
@.str.2 = [10 x i8] c"Kgalagadi\00"
@.str.3 = [9 x i8] c"Kgatleng\00"
@.str.4 = [8 x i8] c"Kweneng\00"
@.str.5 = [11 x i8] c"North-East\00"
@.str.6 = [11 x i8] c"South-East\00"
@.str.7 = [9 x i8] c"Southern\00"
@.str.8 = [11 x i8] c"North-West\00"
define i8* @get_region_name_BW(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %14 [
i32 1, label %5
i32 3, label %6
i32 4, label %7
i32 5, label %8
i32 6, label %9
i32 8, label %10
i32 9, label %11
i32 10, label %12
i32 11, label %13
]
5: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i8** %2
br label %15
6: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %15
7: ; preds = %1
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %15
8: ; preds = %1
store i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %15
9: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %15
10: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %15
11: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %15
12: ; preds = %1
store i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.7, i64 0, i64 0), i8** %2
br label %15
13: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.8, i64 0, i64 0), i8** %2
br label %15
14: ; preds = %1
store i8* null, i8** %2
br label %15
15: ; preds = %14, %13, %12, %11, %10, %9, %8, %7, %6, %5
%16 = load i8*, i8** %2
ret i8* %16
}

LLVM IR (-O2):
@.str = [8 x i8] c"Central\00"
@.str.1 = [7 x i8] c"Ghanzi\00"
@.str.2 = [10 x i8] c"Kgalagadi\00"
@.str.3 = [9 x i8] c"Kgatleng\00"
@.str.4 = [8 x i8] c"Kweneng\00"
@.str.5 = [11 x i8] c"North-East\00"
@.str.6 = [11 x i8] c"South-East\00"
@.str.7 = [9 x i8] c"Southern\00"
@.str.8 = [11 x i8] c"North-West\00"
@switch.table.get_region_name_BW = [11 x i8*] [i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i8* null, i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.2, i64 0, i64 0), i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.4, i64 0, i64 0), i8* null, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.5, i64 0, i64 0), i8* getelementptr inbounds ([11 x i8], [11 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 ([11 x i8], [11 x i8]* @.str.8, i64 0, i64 0)]
define i8* @get_region_name_BW(i32 %0) {
%2 = add i32 %0, -1
%3 = icmp ult i32 %2, 11
br i1 %3, label %4, label %8
4: ; preds = %1
%5 = sext i32 %2 to i64
%6 = getelementptr inbounds [11 x i8*], [11 x i8*]* @switch.table.get_region_name_BW, 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
}