char *findHour(int h) {
  char *hours = "";
  switch (h) {
  case 1:
    hours = "one";
    break;
  case 2:
    hours = "two";
    break;
  case 3:
    hours = "three";
    break;
  case 4:
    hours = "four";
    break;
  case 5:
    hours = "five";
    break;
  case 6:
    hours = "six";
    break;
  case 7:
    hours = "seven";
    break;
  case 8:
    hours = "eight";
    break;
  case 9:
    hours = "nine";
    break;
  case 10:
    hours = "ten";
    break;
  case 11:
    hours = "eleven";
    break;
  case 12:
    hours = "twelve";
    break;
  default:
    hours = "";
    break;
  }
  return hours;
}


x86 assembly (clang, -O0):
<findHour>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0x4(%rbp)
lea    0xf2f(%rip),%rax
mov    %rax,-0x10(%rbp)
mov    -0x4(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,%ecx
mov    %rcx,-0x18(%rbp)
sub    $0xb,%eax
ja     11fb <findHour+0xfb>
mov    -0x18(%rbp),%rax
lea    0xece(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xeee(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    1206 <findHour+0x106>
lea    0xee2(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    1206 <findHour+0x106>
lea    0xed6(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    1206 <findHour+0x106>
lea    0xecc(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    1206 <findHour+0x106>
lea    0xec1(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    1206 <findHour+0x106>
lea    0xeb6(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    1206 <findHour+0x106>
lea    0xeaa(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    1206 <findHour+0x106>
lea    0xea0(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    1206 <findHour+0x106>
lea    0xe96(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    1206 <findHour+0x106>
lea    0xe8b(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    1206 <findHour+0x106>
lea    0xe7f(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    1206 <findHour+0x106>
lea    0xe76(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    1206 <findHour+0x106>
lea    0xe3b(%rip),%rax
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<findHour>:
add    $0xffffffff,%edi
cmp    $0xb,%edi
ja     111a <findHour+0x1a>
movslq %edi,%rax
lea    0xf2e(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xeec(%rip),%rax
ret

LLVM IR (-O0):
@.str = [1 x i8] zeroinitializer
@.str.1 = [4 x i8] c"one\00"
@.str.2 = [4 x i8] c"two\00"
@.str.3 = [6 x i8] c"three\00"
@.str.4 = [5 x i8] c"four\00"
@.str.5 = [5 x i8] c"five\00"
@.str.6 = [4 x i8] c"six\00"
@.str.7 = [6 x i8] c"seven\00"
@.str.8 = [6 x i8] c"eight\00"
@.str.9 = [5 x i8] c"nine\00"
@.str.10 = [4 x i8] c"ten\00"
@.str.11 = [7 x i8] c"eleven\00"
@.str.12 = [7 x i8] c"twelve\00"
define i8* @findHour(i32 %0) {
%2 = alloca i32
%3 = alloca i8*
store i32 %0, i32* %2
store i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str, i64 0, i64 0), i8** %3
%4 = load i32, i32* %2
switch i32 %4, label %17 [
i32 1, label %5
i32 2, label %6
i32 3, label %7
i32 4, label %8
i32 5, label %9
i32 6, label %10
i32 7, label %11
i32 8, label %12
i32 9, label %13
i32 10, label %14
i32 11, label %15
i32 12, label %16
]
5: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8** %3
br label %18
6: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i8** %3
br label %18
7: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.3, i64 0, i64 0), i8** %3
br label %18
8: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.4, i64 0, i64 0), i8** %3
br label %18
9: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.5, i64 0, i64 0), i8** %3
br label %18
10: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.6, i64 0, i64 0), i8** %3
br label %18
11: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.7, i64 0, i64 0), i8** %3
br label %18
12: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.8, i64 0, i64 0), i8** %3
br label %18
13: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.9, i64 0, i64 0), i8** %3
br label %18
14: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i8** %3
br label %18
15: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.11, i64 0, i64 0), i8** %3
br label %18
16: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.12, i64 0, i64 0), i8** %3
br label %18
17: ; preds = %1
store i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str, i64 0, i64 0), i8** %3
br label %18
18: ; preds = %17, %16, %15, %14, %13, %12, %11, %10, %9, %8, %7, %6, %5
%19 = load i8*, i8** %3
ret i8* %19
}

LLVM IR (-O2):
@.str = [1 x i8] zeroinitializer
@.str.1 = [4 x i8] c"one\00"
@.str.2 = [4 x i8] c"two\00"
@.str.3 = [6 x i8] c"three\00"
@.str.4 = [5 x i8] c"four\00"
@.str.5 = [5 x i8] c"five\00"
@.str.6 = [4 x i8] c"six\00"
@.str.7 = [6 x i8] c"seven\00"
@.str.8 = [6 x i8] c"eight\00"
@.str.9 = [5 x i8] c"nine\00"
@.str.10 = [4 x i8] c"ten\00"
@.str.11 = [7 x i8] c"eleven\00"
@.str.12 = [7 x i8] c"twelve\00"
@reltable.findHour = [12 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.1 to i64), i64 ptrtoint ([12 x i32]* @reltable.findHour to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.2 to i64), i64 ptrtoint ([12 x i32]* @reltable.findHour to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([6 x i8]* @.str.3 to i64), i64 ptrtoint ([12 x i32]* @reltable.findHour to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.4 to i64), i64 ptrtoint ([12 x i32]* @reltable.findHour to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.5 to i64), i64 ptrtoint ([12 x i32]* @reltable.findHour to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.6 to i64), i64 ptrtoint ([12 x i32]* @reltable.findHour to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([6 x i8]* @.str.7 to i64), i64 ptrtoint ([12 x i32]* @reltable.findHour to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([6 x i8]* @.str.8 to i64), i64 ptrtoint ([12 x i32]* @reltable.findHour to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.9 to i64), i64 ptrtoint ([12 x i32]* @reltable.findHour to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.10 to i64), i64 ptrtoint ([12 x i32]* @reltable.findHour to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([7 x i8]* @.str.11 to i64), i64 ptrtoint ([12 x i32]* @reltable.findHour to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([7 x i8]* @.str.12 to i64), i64 ptrtoint ([12 x i32]* @reltable.findHour to i64)) to i32)]
define i8* @findHour(i32 %0) {
%2 = add i32 %0, -1
%3 = icmp ult i32 %2, 12
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 ([12 x i32]* @reltable.findHour to i8*), i64 %6)
br label %8
8: ; preds = %1, %4
%9 = phi i8* [ %7, %4 ], [ getelementptr inbounds ([1 x i8], [1 x i8]* @.str, i64 0, i64 0), %1 ]
ret i8* %9
}