char *mtp3_timer2str(int mtp3_timer) {
  switch (mtp3_timer) {
  case 1:
    return "T1";
  case 2:
    return "T2";
  case 3:
    return "T3";
  case 4:
    return "T5";
  case 6:
    return "T6";
  case 7:
    return "T7";
  case 9:
    return "T10";
  case 10:
    return "T12";
  case 11:
    return "T13";
  case 12:
    return "T14";
  case 13:
    return "T19";
  case 14:
    return "T21";
  case 15:
    return "T22";
  case 16:
    return "T23";
  case 17:
    return "Q707_T1";
  case 18:
    return "Q707_T2";
  }
  return "Unknown";
}


x86 assembly (clang, -O0):
<mtp3_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    $0x11,%eax
ja     1230 <mtp3_timer2str+0x130>
mov    -0x18(%rbp),%rax
lea    0xed9(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xf42(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    123b <mtp3_timer2str+0x13b>
lea    0xf3a(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    123b <mtp3_timer2str+0x13b>
lea    0xef1(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    123b <mtp3_timer2str+0x13b>
lea    0xee4(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    123b <mtp3_timer2str+0x13b>
lea    0xed7(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    123b <mtp3_timer2str+0x13b>
lea    0xeca(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    123b <mtp3_timer2str+0x13b>
lea    0xebd(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    123b <mtp3_timer2str+0x13b>
lea    0xeb1(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    123b <mtp3_timer2str+0x13b>
lea    0xea5(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    123b <mtp3_timer2str+0x13b>
lea    0xe99(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    123b <mtp3_timer2str+0x13b>
lea    0xe8d(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    123b <mtp3_timer2str+0x13b>
lea    0xe81(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    123b <mtp3_timer2str+0x13b>
lea    0xe75(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    123b <mtp3_timer2str+0x13b>
lea    0xe69(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    123b <mtp3_timer2str+0x13b>
lea    0xe5d(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    123b <mtp3_timer2str+0x13b>
lea    0xe55(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    123b <mtp3_timer2str+0x13b>
lea    0xe4d(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<mtp3_timer2str>:
add    $0xffffffff,%edi
cmp    $0x11,%edi
ja     111a <mtp3_timer2str+0x1a>
movslq %edi,%rax
lea    0xf32(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xf1b(%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"T3\00"
@.str.3 = [3 x i8] c"T5\00"
@.str.4 = [3 x i8] c"T6\00"
@.str.5 = [3 x i8] c"T7\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"T19\00"
@.str.11 = [4 x i8] c"T21\00"
@.str.12 = [4 x i8] c"T22\00"
@.str.13 = [4 x i8] c"T23\00"
@.str.14 = [8 x i8] c"Q707_T1\00"
@.str.15 = [8 x i8] c"Q707_T2\00"
@.str.16 = [8 x i8] c"Unknown\00"
define i8* @mtp3_timer2str(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %21 [
i32 1, label %5
i32 2, label %6
i32 3, label %7
i32 4, label %8
i32 6, label %9
i32 7, label %10
i32 9, label %11
i32 10, label %12
i32 11, label %13
i32 12, label %14
i32 13, label %15
i32 14, label %16
i32 15, label %17
i32 16, label %18
i32 17, label %19
i32 18, label %20
]
5: ; preds = %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8** %2
br label %22
6: ; preds = %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %22
7: ; preds = %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %22
8: ; preds = %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %22
9: ; preds = %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %22
10: ; preds = %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %22
11: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %22
12: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.7, i64 0, i64 0), i8** %2
br label %22
13: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.8, i64 0, i64 0), i8** %2
br label %22
14: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.9, i64 0, i64 0), i8** %2
br label %22
15: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i8** %2
br label %22
16: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.11, i64 0, i64 0), i8** %2
br label %22
17: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.12, i64 0, i64 0), i8** %2
br label %22
18: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.13, i64 0, i64 0), i8** %2
br label %22
19: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.14, i64 0, i64 0), i8** %2
br label %22
20: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.15, i64 0, i64 0), i8** %2
br label %22
21: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.16, i64 0, i64 0), i8** %2
br label %22
22: ; preds = %21, %20, %19, %18, %17, %16, %15, %14, %13, %12, %11, %10, %9, %8, %7, %6, %5
%23 = load i8*, i8** %2
ret i8* %23
}

LLVM IR (-O2):
@.str = [3 x i8] c"T1\00"
@.str.1 = [3 x i8] c"T2\00"
@.str.2 = [3 x i8] c"T3\00"
@.str.3 = [3 x i8] c"T5\00"
@.str.4 = [3 x i8] c"T6\00"
@.str.5 = [3 x i8] c"T7\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"T19\00"
@.str.11 = [4 x i8] c"T21\00"
@.str.12 = [4 x i8] c"T22\00"
@.str.13 = [4 x i8] c"T23\00"
@.str.14 = [8 x i8] c"Q707_T1\00"
@.str.15 = [8 x i8] c"Q707_T2\00"
@.str.16 = [8 x i8] c"Unknown\00"
@reltable.mtp3_timer2str = [18 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([3 x i8]* @.str to i64), i64 ptrtoint ([18 x i32]* @reltable.mtp3_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([3 x i8]* @.str.1 to i64), i64 ptrtoint ([18 x i32]* @reltable.mtp3_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([3 x i8]* @.str.2 to i64), i64 ptrtoint ([18 x i32]* @reltable.mtp3_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([3 x i8]* @.str.3 to i64), i64 ptrtoint ([18 x i32]* @reltable.mtp3_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.16 to i64), i64 ptrtoint ([18 x i32]* @reltable.mtp3_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([3 x i8]* @.str.4 to i64), i64 ptrtoint ([18 x i32]* @reltable.mtp3_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([3 x i8]* @.str.5 to i64), i64 ptrtoint ([18 x i32]* @reltable.mtp3_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.16 to i64), i64 ptrtoint ([18 x i32]* @reltable.mtp3_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.6 to i64), i64 ptrtoint ([18 x i32]* @reltable.mtp3_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.7 to i64), i64 ptrtoint ([18 x i32]* @reltable.mtp3_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.8 to i64), i64 ptrtoint ([18 x i32]* @reltable.mtp3_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.9 to i64), i64 ptrtoint ([18 x i32]* @reltable.mtp3_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.10 to i64), i64 ptrtoint ([18 x i32]* @reltable.mtp3_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.11 to i64), i64 ptrtoint ([18 x i32]* @reltable.mtp3_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.12 to i64), i64 ptrtoint ([18 x i32]* @reltable.mtp3_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.13 to i64), i64 ptrtoint ([18 x i32]* @reltable.mtp3_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.14 to i64), i64 ptrtoint ([18 x i32]* @reltable.mtp3_timer2str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.15 to i64), i64 ptrtoint ([18 x i32]* @reltable.mtp3_timer2str to i64)) to i32)]
define i8* @mtp3_timer2str(i32 %0) {
%2 = add i32 %0, -1
%3 = icmp ult i32 %2, 18
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 ([18 x i32]* @reltable.mtp3_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.16, i64 0, i64 0), %1 ]
ret i8* %9
}