char *getNameFromMode(int mode) {
  switch (mode) {
  case 1:
    return "additions";
  case 2:
    return "multiplications";
  case 3:
    return "divisions";
  case 4:
    return "cosines";
  case 5:
    return "square roots";
  case 6:
    return "arc-tangents";
  case 7:
    return "y.log2(x) operations";
  case 8:
    return "combined sine/cosines";
  case 9:
    return "binary exponentials";
  case 15:
    return "add-and-stores";
  case 16:
    return "sums";
  case 17:
    return "multiplications";
  case 18:
    return "divisions";
  case 11:
    return "sequential fetches";
  case 12:
    return "random fetches";
  case 13:
    return "stores";
  case 14:
    return "fetches and stores";
  default:
    return "unknown operations";
  }
}


x86 assembly (clang, -O0):
<getNameFromMode>:
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     1240 <getNameFromMode+0x140>
mov    -0x18(%rbp),%rax
lea    0xed9(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xf11(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    124b <getNameFromMode+0x14b>
lea    0xf0b(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    124b <getNameFromMode+0x14b>
lea    0xf0b(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    124b <getNameFromMode+0x14b>
lea    0xf42(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    124b <getNameFromMode+0x14b>
lea    0xef5(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    124b <getNameFromMode+0x14b>
lea    0xef2(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    124b <getNameFromMode+0x14b>
lea    0xeef(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    124b <getNameFromMode+0x14b>
lea    0xef4(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    124b <getNameFromMode+0x14b>
lea    0xefa(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    124b <getNameFromMode+0x14b>
lea    0xefe(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    124b <getNameFromMode+0x14b>
lea    0xefd(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    124b <getNameFromMode+0x14b>
lea    0xe6b(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    124b <getNameFromMode+0x14b>
lea    0xe6b(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    124b <getNameFromMode+0x14b>
lea    0xed2(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    124b <getNameFromMode+0x14b>
lea    0xed5(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    124b <getNameFromMode+0x14b>
lea    0xee0(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    124b <getNameFromMode+0x14b>
lea    0xec4(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    124b <getNameFromMode+0x14b>
lea    0xec7(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<getNameFromMode>:
add    $0xffffffff,%edi
cmp    $0x11,%edi
ja     111a <getNameFromMode+0x1a>
movslq %edi,%rax
lea    0xfca(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xfa5(%rip),%rax
ret

LLVM IR (-O0):
@.str = [10 x i8] c"additions\00"
@.str.1 = [16 x i8] c"multiplications\00"
@.str.2 = [10 x i8] c"divisions\00"
@.str.3 = [8 x i8] c"cosines\00"
@.str.4 = [13 x i8] c"square roots\00"
@.str.5 = [13 x i8] c"arc-tangents\00"
@.str.6 = [21 x i8] c"y.log2(x) operations\00"
@.str.7 = [22 x i8] c"combined sine/cosines\00"
@.str.8 = [20 x i8] c"binary exponentials\00"
@.str.9 = [15 x i8] c"add-and-stores\00"
@.str.10 = [5 x i8] c"sums\00"
@.str.11 = [19 x i8] c"sequential fetches\00"
@.str.12 = [15 x i8] c"random fetches\00"
@.str.13 = [7 x i8] c"stores\00"
@.str.14 = [19 x i8] c"fetches and stores\00"
@.str.15 = [19 x i8] c"unknown operations\00"
define i8* @getNameFromMode(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %22 [
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 15, label %14
i32 16, label %15
i32 17, label %16
i32 18, label %17
i32 11, label %18
i32 12, label %19
i32 13, label %20
i32 14, label %21
]
5: ; preds = %1
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0), i8** %2
br label %23
6: ; preds = %1
store i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %23
7: ; preds = %1
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %23
8: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %23
9: ; preds = %1
store i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %23
10: ; preds = %1
store i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %23
11: ; preds = %1
store i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %23
12: ; preds = %1
store i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.7, i64 0, i64 0), i8** %2
br label %23
13: ; preds = %1
store i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.8, i64 0, i64 0), i8** %2
br label %23
14: ; preds = %1
store i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.9, i64 0, i64 0), i8** %2
br label %23
15: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.10, i64 0, i64 0), i8** %2
br label %23
16: ; preds = %1
store i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %23
17: ; preds = %1
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %23
18: ; preds = %1
store i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.11, i64 0, i64 0), i8** %2
br label %23
19: ; preds = %1
store i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.12, i64 0, i64 0), i8** %2
br label %23
20: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.13, i64 0, i64 0), i8** %2
br label %23
21: ; preds = %1
store i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.14, i64 0, i64 0), i8** %2
br label %23
22: ; preds = %1
store i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.15, i64 0, i64 0), i8** %2
br label %23
23: ; preds = %22, %21, %20, %19, %18, %17, %16, %15, %14, %13, %12, %11, %10, %9, %8, %7, %6, %5
%24 = load i8*, i8** %2
ret i8* %24
}

LLVM IR (-O2):
@.str = [10 x i8] c"additions\00"
@.str.1 = [16 x i8] c"multiplications\00"
@.str.2 = [10 x i8] c"divisions\00"
@.str.3 = [8 x i8] c"cosines\00"
@.str.4 = [13 x i8] c"square roots\00"
@.str.5 = [13 x i8] c"arc-tangents\00"
@.str.6 = [21 x i8] c"y.log2(x) operations\00"
@.str.7 = [22 x i8] c"combined sine/cosines\00"
@.str.8 = [20 x i8] c"binary exponentials\00"
@.str.9 = [15 x i8] c"add-and-stores\00"
@.str.10 = [5 x i8] c"sums\00"
@.str.11 = [19 x i8] c"sequential fetches\00"
@.str.12 = [15 x i8] c"random fetches\00"
@.str.13 = [7 x i8] c"stores\00"
@.str.14 = [19 x i8] c"fetches and stores\00"
@.str.15 = [19 x i8] c"unknown operations\00"
@reltable.getNameFromMode = [18 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([10 x i8]* @.str to i64), i64 ptrtoint ([18 x i32]* @reltable.getNameFromMode to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([16 x i8]* @.str.1 to i64), i64 ptrtoint ([18 x i32]* @reltable.getNameFromMode to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([10 x i8]* @.str.2 to i64), i64 ptrtoint ([18 x i32]* @reltable.getNameFromMode to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.3 to i64), i64 ptrtoint ([18 x i32]* @reltable.getNameFromMode to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([13 x i8]* @.str.4 to i64), i64 ptrtoint ([18 x i32]* @reltable.getNameFromMode to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([13 x i8]* @.str.5 to i64), i64 ptrtoint ([18 x i32]* @reltable.getNameFromMode to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([21 x i8]* @.str.6 to i64), i64 ptrtoint ([18 x i32]* @reltable.getNameFromMode to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([22 x i8]* @.str.7 to i64), i64 ptrtoint ([18 x i32]* @reltable.getNameFromMode to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.8 to i64), i64 ptrtoint ([18 x i32]* @reltable.getNameFromMode to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([19 x i8]* @.str.15 to i64), i64 ptrtoint ([18 x i32]* @reltable.getNameFromMode to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([19 x i8]* @.str.11 to i64), i64 ptrtoint ([18 x i32]* @reltable.getNameFromMode to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([15 x i8]* @.str.12 to i64), i64 ptrtoint ([18 x i32]* @reltable.getNameFromMode to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([7 x i8]* @.str.13 to i64), i64 ptrtoint ([18 x i32]* @reltable.getNameFromMode to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([19 x i8]* @.str.14 to i64), i64 ptrtoint ([18 x i32]* @reltable.getNameFromMode to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([15 x i8]* @.str.9 to i64), i64 ptrtoint ([18 x i32]* @reltable.getNameFromMode to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.10 to i64), i64 ptrtoint ([18 x i32]* @reltable.getNameFromMode to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([16 x i8]* @.str.1 to i64), i64 ptrtoint ([18 x i32]* @reltable.getNameFromMode to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([10 x i8]* @.str.2 to i64), i64 ptrtoint ([18 x i32]* @reltable.getNameFromMode to i64)) to i32)]
define i8* @getNameFromMode(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.getNameFromMode to i8*), i64 %6)
br label %8
8: ; preds = %1, %4
%9 = phi i8* [ %7, %4 ], [ getelementptr inbounds ([19 x i8], [19 x i8]* @.str.15, i64 0, i64 0), %1 ]
ret i8* %9
}