#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 *htmlentities(char c) {
  switch (c) {
  case '&':
    return "&amp;";
  case '<':
    return "&lt;";
  case '>':
    return "&gt;";
  case '"':
    return "&quot;";
  case '\'':
    return "&#x27;";
  case '/':
    return "&#x2F;";
  }
  return NULL;
}


x86 assembly (clang, -O0):
<htmlentities>:
push   %rbp
mov    %rsp,%rbp
mov    %dil,%al
mov    %al,-0x9(%rbp)
movsbl -0x9(%rbp),%eax
add    $0xffffffde,%eax
mov    %eax,%ecx
mov    %rcx,-0x18(%rbp)
sub    $0x1c,%eax
ja     1194 <htmlentities+0x94>
mov    -0x18(%rbp),%rax
lea    0xed5(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xf39(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    119c <htmlentities+0x9c>
lea    0xf2f(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    119c <htmlentities+0x9c>
lea    0xf24(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    119c <htmlentities+0x9c>
lea    0xf19(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    119c <htmlentities+0x9c>
lea    0xf10(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    119c <htmlentities+0x9c>
lea    0xf07(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    119c <htmlentities+0x9c>
movq   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<htmlentities>:
add    $0xffffffde,%edi
cmp    $0x1c,%edi
ja     1127 <htmlentities+0x27>
lea    0xf65(%rip),%rax
lea    0xeea(%rip),%rcx
movslq (%rcx,%rdi,4),%rdx
add    %rcx,%rdx
jmp    *%rdx
lea    0xf5e(%rip),%rax
ret
xor    %eax,%eax
ret
lea    0xf5a(%rip),%rax
ret
lea    0xf59(%rip),%rax
ret
lea    0xf39(%rip),%rax
ret
lea    0xf36(%rip),%rax
ret

LLVM IR (-O0):
@.str = [6 x i8] c"&amp;\00"
@.str.1 = [5 x i8] c"&lt;\00"
@.str.2 = [5 x i8] c"&gt;\00"
@.str.3 = [7 x i8] c"&quot;\00"
@.str.4 = [7 x i8] c"&#x27;\00"
@.str.5 = [7 x i8] c"&#x2F;\00"
define i8* @htmlentities(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 38, label %6
i32 60, label %7
i32 62, label %8
i32 34, label %9
i32 39, label %10
i32 47, label %11
]
6: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i8** %2
br label %13
7: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %13
8: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %13
9: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %13
10: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %13
11: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 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 = [6 x i8] c"&amp;\00"
@.str.1 = [5 x i8] c"&lt;\00"
@.str.2 = [5 x i8] c"&gt;\00"
@.str.3 = [7 x i8] c"&quot;\00"
@.str.4 = [7 x i8] c"&#x27;\00"
@.str.5 = [7 x i8] c"&#x2F;\00"
define i8* @htmlentities(i8 signext %0) {
%2 = sext i8 %0 to i32
switch i32 %2, label %8 [
i32 38, label %9
i32 60, label %3
i32 62, label %4
i32 34, label %5
i32 39, label %6
i32 47, 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 ([7 x i8], [7 x i8]* @.str.5, i64 0, i64 0), %7 ], [ getelementptr inbounds ([7 x i8], [7 x i8]* @.str.4, i64 0, i64 0), %6 ], [ getelementptr inbounds ([7 x i8], [7 x i8]* @.str.3, i64 0, i64 0), %5 ], [ getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0), %4 ], [ getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), %3 ], [ getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), %1 ]
ret i8* %10
}