const char *typename(char t) {
  switch (t) {
  case '!':
    return "blanket";
  case '+':
    return "session";
  case '*':
    return "one-shot";
  case '=':
    return "permit";
  case '-':
    return "deny";
  }
  return 0;
}


x86 assembly (clang, -O0):
<typename>:
push   %rbp
mov    %rsp,%rbp
mov    %dil,%al
mov    %al,-0x9(%rbp)
movsbl -0x9(%rbp),%eax
add    $0xffffffdf,%eax
mov    %eax,%ecx
mov    %rcx,-0x18(%rbp)
sub    $0x1c,%eax
ja     1184 <typename+0x84>
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    118c <typename+0x8c>
lea    0xf31(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    118c <typename+0x8c>
lea    0xf29(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    118c <typename+0x8c>
lea    0xf22(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    118c <typename+0x8c>
lea    0xf19(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    118c <typename+0x8c>
movq   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<typename>:
add    $0xffffffdf,%edi
cmp    $0x1c,%edi
ja     1127 <typename+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    0xf4b(%rip),%rax
ret
lea    0xf5b(%rip),%rax
ret
lea    0xf4c(%rip),%rax
ret

LLVM IR (-O0):
@.str = [8 x i8] c"blanket\00"
@.str.1 = [8 x i8] c"session\00"
@.str.2 = [9 x i8] c"one-shot\00"
@.str.3 = [7 x i8] c"permit\00"
@.str.4 = [5 x i8] c"deny\00"
define i8* @typename(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 %11 [
i32 33, label %6
i32 43, label %7
i32 42, label %8
i32 61, label %9
i32 45, label %10
]
6: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i8** %2
br label %12
7: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %12
8: ; preds = %1
store i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %12
9: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %12
10: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %12
11: ; preds = %1
store i8* null, i8** %2
br label %12
12: ; preds = %11, %10, %9, %8, %7, %6
%13 = load i8*, i8** %2
ret i8* %13
}

LLVM IR (-O2):
@.str = [8 x i8] c"blanket\00"
@.str.1 = [8 x i8] c"session\00"
@.str.2 = [9 x i8] c"one-shot\00"
@.str.3 = [7 x i8] c"permit\00"
@.str.4 = [5 x i8] c"deny\00"
define i8* @typename(i8 signext %0) {
%2 = sext i8 %0 to i32
switch i32 %2, label %7 [
i32 33, label %8
i32 43, label %3
i32 42, label %4
i32 61, label %5
i32 45, label %6
]
3: ; preds = %1
br label %8
4: ; preds = %1
br label %8
5: ; preds = %1
br label %8
6: ; preds = %1
br label %8
7: ; preds = %1
br label %8
8: ; preds = %1, %7, %6, %5, %4, %3
%9 = phi i8* [ null, %7 ], [ getelementptr inbounds ([5 x i8], [5 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 ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), %4 ], [ getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0), %3 ], [ getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), %1 ]
ret i8* %9
}