char *isup_timer2str(int timer) {
  switch (timer) {
  case 1:
    return "t1";
  case 2:
    return "t2";
  case 5:
    return "t5";
  case 6:
    return "t6";
  case 7:
    return "t7";
  case 8:
    return "t8";
  case 10:
    return "t10";
  case 12:
    return "t12";
  case 13:
    return "t13";
  case 14:
    return "t14";
  case 15:
    return "t15";
  case 16:
    return "t16";
  case 17:
    return "t17";
  case 18:
    return "t18";
  case 19:
    return "t19";
  case 20:
    return "t20";
  case 21:
    return "t21";
  case 22:
    return "t22";
  case 23:
    return "t23";
  case 27:
    return "t27";
  case 33:
    return "t33";
  case 35:
    return "t35";
  default:
    return "unknown";
  }
}


x86 assembly (clang, -O0):
<isup_timer2str>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,%ecx
mov    %rcx,-0x18(%rbp)
sub    $0x22,%eax
ja     1290 <isup_timer2str+0x190>
mov    -0x18(%rbp),%rax
lea    0xed9(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xf55(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xf48(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xf3b(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xf2e(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xf21(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xf14(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xf07(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xefb(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xeef(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xee3(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xed7(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xecb(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xebf(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xeb3(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xea7(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xe9b(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xe8f(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xe83(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xe77(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xe6b(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xe5f(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xe53(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    129b <isup_timer2str+0x19b>
lea    0xe47(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<isup_timer2str>:
add    $0xffffffff,%edi
cmp    $0x22,%edi
ja     111a <isup_timer2str+0x1a>
movslq %edi,%rax
lea    0xf4a(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xf31(%rip),%rax
ret

LLVM IR (-O0):
@.str = [3 x i8] c"t1\00"
@.str.1 = [3 x i8] c"t2\00"
@.str.2 = [3 x i8] c"t5\00"
@.str.3 = [3 x i8] c"t6\00"
@.str.4 = [3 x i8] c"t7\00"
@.str.5 = [3 x i8] c"t8\00"
@.str.6 = [4 x i8] c"t10\00"
@.str.7 = [4 x i8] c"t12\00"
@.str.8 = [4 x i8] c"t13\00"
@.str.9 = [4 x i8] c"t14\00"
@.str.10 = [4 x i8] c"t15\00"
@.str.11 = [4 x i8] c"t16\00"
@.str.12 = [4 x i8] c"t17\00"
@.str.13 = [4 x i8] c"t18\00"
@.str.14 = [4 x i8] c"t19\00"
@.str.15 = [4 x i8] c"t20\00"
@.str.16 = [4 x i8] c"t21\00"
@.str.17 = [4 x i8] c"t22\00"
@.str.18 = [4 x i8] c"t23\00"
@.str.19 = [4 x i8] c"t27\00"
@.str.20 = [4 x i8] c"t33\00"
@.str.21 = [4 x i8] c"t35\00"
@.str.22 = [8 x i8] c"unknown\00"
define i8* @isup_timer2str(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %27 [
i32 1, label %5
i32 2, label %6
i32 5, label %7
i32 6, label %8
i32 7, label %9
i32 8, label %10
i32 10, label %11
i32 12, label %12
i32 13, label %13
i32 14, label %14
i32 15, label %15
i32 16, label %16
i32 17, label %17
i32 18, label %18
i32 19, label %19
i32 20, label %20
i32 21, label %21
i32 22, label %22
i32 23, label %23
i32 27, label %24
i32 33, label %25
i32 35, label %26
]
5: ; preds = %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8** %2
br label %28
6: ; preds = %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %28
7: ; preds = %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %28
8: ; preds = %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %28
9: ; preds = %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %28
10: ; preds = %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %28
11: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %28
12: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.7, i64 0, i64 0), i8** %2
br label %28
13: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.8, i64 0, i64 0), i8** %2
br label %28
14: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.9, i64 0, i64 0), i8** %2
br label %28
15: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i8** %2
br label %28
16: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.11, i64 0, i64 0), i8** %2
br label %28
17: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.12, i64 0, i64 0), i8** %2
br label %28
18: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.13, i64 0, i64 0), i8** %2
br label %28
19: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.14, i64 0, i64 0), i8** %2
br label %28
20: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.15, i64 0, i64 0), i8** %2
br label %28
21: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.16, i64 0, i64 0), i8** %2
br label %28
22: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.17, i64 0, i64 0), i8** %2
br label %28
23: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.18, i64 0, i64 0), i8** %2
br label %28
24: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.19, i64 0, i64 0), i8** %2
br label %28
25: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.20, i64 0, i64 0), i8** %2
br label %28
26: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.21, i64 0, i64 0), i8** %2
br label %28
27: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.22, i64 0, i64 0), i8** %2
br label %28
28: ; preds = %27, %26, %25, %24, %23, %22, %21, %20, %19, %18, %17, %16, %15, %14, %13, %12, %11, %10, %9, %8, %7, %6, %5
%29 = load i8*, i8** %2
ret i8* %29
}

LLVM IR (-O2):
@.str = [3 x i8] c"t1\00"
@.str.1 = [3 x i8] c"t2\00"
@.str.2 = [3 x i8] c"t5\00"
@.str.3 = [3 x i8] c"t6\00"
@.str.4 = [3 x i8] c"t7\00"
@.str.5 = [3 x i8] c"t8\00"
@.str.6 = [4 x i8] c"t10\00"
@.str.7 = [4 x i8] c"t12\00"
@.str.8 = [4 x i8] c"t13\00"
@.str.9 = [4 x i8] c"t14\00"
@.str.10 = [4 x i8] c"t15\00"
@.str.11 = [4 x i8] c"t16\00"
@.str.12 = [4 x i8] c"t17\00"
@.str.13 = [4 x i8] c"t18\00"
@.str.14 = [4 x i8] c"t19\00"
@.str.15 = [4 x i8] c"t20\00"
@.str.16 = [4 x i8] c"t21\00"
@.str.17 = [4 x i8] c"t22\00"
@.str.18 = [4 x i8] c"t23\00"
@.str.19 = [4 x i8] c"t27\00"
@.str.20 = [4 x i8] c"t33\00"
@.str.21 = [4 x i8] c"t35\00"
@.str.22 = [8 x i8] c"unknown\00"
@reltable.isup_timer2str = [35 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([3 x i8]* @.str to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([3 x i8]* @.str.1 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.22 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.22 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([3 x i8]* @.str.2 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([3 x i8]* @.str.3 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([3 x i8]* @.str.4 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([3 x i8]* @.str.5 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.22 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.6 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.22 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.7 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.8 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.9 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.10 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.11 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.12 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.13 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.14 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.15 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.16 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.17 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.18 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.22 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.22 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.22 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.19 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.22 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.22 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.22 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.22 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.22 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.20 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.22 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.21 to i64), i64 ptrtoint ([35 x i32]* @reltable.isup_timer2str to i64)) to i32)]
define i8* @isup_timer2str(i32 %0) {
%2 = add i32 %0, -1
%3 = icmp ult i32 %2, 35
br i1 %3, label %4, label %8
4: ; preds = %1
%5 = sext i32 %2 to i64
%6 = shl i64 %5, 2
%7 = call i8* @llvm.load.relative.i64(i8* bitcast ([35 x i32]* @reltable.isup_timer2str to i8*), i64 %6)
br label %8
8: ; preds = %1, %4
%9 = phi i8* [ %7, %4 ], [ getelementptr inbounds ([8 x i8], [8 x i8]* @.str.22, i64 0, i64 0), %1 ]
ret i8* %9
}