#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 *_expansion(char digit) {
  switch (digit) {
  case 'M':
    return "DD";
  case 'D':
    return "CCCCC";
  case 'C':
    return "LL";
  case 'L':
    return "XXXXX";
  case 'X':
    return "VV";
  case 'V':
    return "IIIII";
  }
  return NULL;
}


x86 assembly (clang, -O0):
<_expansion>:
push   %rbp
mov    %rsp,%rbp
mov    %dil,%al
mov    %al,-0x9(%rbp)
movsbl -0x9(%rbp),%eax
add    $0xffffffbd,%eax
mov    %eax,%ecx
mov    %rcx,-0x18(%rbp)
sub    $0x15,%eax
ja     1194 <_expansion+0x94>
mov    -0x18(%rbp),%rax
lea    0xed5(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xf1d(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    119c <_expansion+0x9c>
lea    0xf10(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    119c <_expansion+0x9c>
lea    0xf06(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    119c <_expansion+0x9c>
lea    0xef9(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    119c <_expansion+0x9c>
lea    0xeef(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    119c <_expansion+0x9c>
lea    0xee2(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    119c <_expansion+0x9c>
movq   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<_expansion>:
add    $0xffffffbd,%edi
cmp    $0x15,%edi
ja     112f <_expansion+0x2f>
lea    0xf49(%rip),%rax
lea    0xeea(%rip),%rcx
movslq (%rcx,%rdi,4),%rdx
add    %rcx,%rdx
jmp    *%rdx
lea    0xf3b(%rip),%rax
ret
lea    0xf2d(%rip),%rax
ret
xor    %eax,%eax
ret
lea    0xf2b(%rip),%rax
ret
lea    0xf2c(%rip),%rax
ret
lea    0xf21(%rip),%rax
ret

LLVM IR (-O0):
@.str = [3 x i8] c"DD\00"
@.str.1 = [6 x i8] c"CCCCC\00"
@.str.2 = [3 x i8] c"LL\00"
@.str.3 = [6 x i8] c"XXXXX\00"
@.str.4 = [3 x i8] c"VV\00"
@.str.5 = [6 x i8] c"IIIII\00"
define i8* @_expansion(i8 signext %0) {
%2 = alloca i8*
%3 = alloca i8
store i8 %0, i8* %3
%4 = load i8, i8* %3
%5 = sext i8 %4 to i32
switch i32 %5, label %12 [
i32 77, label %6
i32 68, label %7
i32 67, label %8
i32 76, label %9
i32 88, label %10
i32 86, label %11
]
6: ; preds = %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8** %2
br label %13
7: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %13
8: ; preds = %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %13
9: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %13
10: ; preds = %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %13
11: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %13
12: ; preds = %1
store i8* null, i8** %2
br label %13
13: ; preds = %12, %11, %10, %9, %8, %7, %6
%14 = load i8*, i8** %2
ret i8* %14
}

LLVM IR (-O2):
@.str = [3 x i8] c"DD\00"
@.str.1 = [6 x i8] c"CCCCC\00"
@.str.2 = [3 x i8] c"LL\00"
@.str.3 = [6 x i8] c"XXXXX\00"
@.str.4 = [3 x i8] c"VV\00"
@.str.5 = [6 x i8] c"IIIII\00"
define i8* @_expansion(i8 signext %0) {
%2 = sext i8 %0 to i32
switch i32 %2, label %8 [
i32 77, label %9
i32 68, label %3
i32 67, label %4
i32 76, label %5
i32 88, label %6
i32 86, label %7
]
3: ; preds = %1
br label %9
4: ; preds = %1
br label %9
5: ; preds = %1
br label %9
6: ; preds = %1
br label %9
7: ; preds = %1
br label %9
8: ; preds = %1
br label %9
9: ; preds = %1, %8, %7, %6, %5, %4, %3
%10 = phi i8* [ null, %8 ], [ getelementptr inbounds ([6 x i8], [6 x i8]* @.str.5, i64 0, i64 0), %7 ], [ getelementptr inbounds ([3 x i8], [3 x i8]* @.str.4, i64 0, i64 0), %6 ], [ getelementptr inbounds ([6 x i8], [6 x i8]* @.str.3, i64 0, i64 0), %5 ], [ getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), %4 ], [ getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), %3 ], [ getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), %1 ]
ret i8* %10
}