char *GetLogLevelName(int pLogLevel) {
  if (1 == pLogLevel) {
    return "Debug";
  } else if (2 == pLogLevel) {
    return "Info";
  } else if (3 == pLogLevel) {
    return "Warn";
  } else if (4 == pLogLevel) {
    return "Error";
  } else if (5 == pLogLevel) {
    return "Wtf";
  } else {
    return "?";
  }
}


x86 assembly (clang, -O0):
<GetLogLevelName>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    $0x1,%eax
cmp    -0xc(%rbp),%eax
jne    1125 <GetLogLevelName+0x25>
lea    0xee4(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11a8 <GetLogLevelName+0xa8>
mov    $0x2,%eax
cmp    -0xc(%rbp),%eax
jne    1143 <GetLogLevelName+0x43>
lea    0xecc(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11a8 <GetLogLevelName+0xa8>
mov    $0x3,%eax
cmp    -0xc(%rbp),%eax
jne    1161 <GetLogLevelName+0x61>
lea    0xeb3(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11a8 <GetLogLevelName+0xa8>
mov    $0x4,%eax
cmp    -0xc(%rbp),%eax
jne    117f <GetLogLevelName+0x7f>
lea    0xe9a(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11a8 <GetLogLevelName+0xa8>
mov    $0x5,%eax
cmp    -0xc(%rbp),%eax
jne    119d <GetLogLevelName+0x9d>
lea    0xe82(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11a8 <GetLogLevelName+0xa8>
lea    0xe76(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<GetLogLevelName>:
add    $0xffffffff,%edi
cmp    $0x4,%edi
ja     111a <GetLogLevelName+0x1a>
movslq %edi,%rax
lea    0xf0a(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xef9(%rip),%rax
ret

LLVM IR (-O0):
@.str = [6 x i8] c"Debug\00"
@.str.1 = [5 x i8] c"Info\00"
@.str.2 = [5 x i8] c"Warn\00"
@.str.3 = [6 x i8] c"Error\00"
@.str.4 = [4 x i8] c"Wtf\00"
@.str.5 = [2 x i8] c"?\00"
define i8* @GetLogLevelName(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
%5 = icmp eq i32 1, %4
br i1 %5, label %6, label %7
6: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i8** %2
br label %24
7: ; preds = %1
%8 = load i32, i32* %3
%9 = icmp eq i32 2, %8
br i1 %9, label %10, label %11
10: ; preds = %7
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %24
11: ; preds = %7
%12 = load i32, i32* %3
%13 = icmp eq i32 3, %12
br i1 %13, label %14, label %15
14: ; preds = %11
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %24
15: ; preds = %11
%16 = load i32, i32* %3
%17 = icmp eq i32 4, %16
br i1 %17, label %18, label %19
18: ; preds = %15
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %24
19: ; preds = %15
%20 = load i32, i32* %3
%21 = icmp eq i32 5, %20
br i1 %21, label %22, label %23
22: ; preds = %19
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %24
23: ; preds = %19
store i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %24
24: ; preds = %23, %22, %18, %14, %10, %6
%25 = load i8*, i8** %2
ret i8* %25
}

LLVM IR (-O2):
@.str = [6 x i8] c"Debug\00"
@.str.1 = [5 x i8] c"Info\00"
@.str.2 = [5 x i8] c"Warn\00"
@.str.3 = [6 x i8] c"Error\00"
@.str.4 = [4 x i8] c"Wtf\00"
@.str.5 = [2 x i8] c"?\00"
@reltable.GetLogLevelName = [5 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([6 x i8]* @.str to i64), i64 ptrtoint ([5 x i32]* @reltable.GetLogLevelName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.1 to i64), i64 ptrtoint ([5 x i32]* @reltable.GetLogLevelName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.2 to i64), i64 ptrtoint ([5 x i32]* @reltable.GetLogLevelName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([6 x i8]* @.str.3 to i64), i64 ptrtoint ([5 x i32]* @reltable.GetLogLevelName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.4 to i64), i64 ptrtoint ([5 x i32]* @reltable.GetLogLevelName to i64)) to i32)]
define i8* @GetLogLevelName(i32 %0) {
%2 = add i32 %0, -1
%3 = icmp ult i32 %2, 5
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 ([5 x i32]* @reltable.GetLogLevelName to i8*), i64 %6)
br label %8
8: ; preds = %1, %4
%9 = phi i8* [ %7, %4 ], [ getelementptr inbounds ([2 x i8], [2 x i8]* @.str.5, i64 0, i64 0), %1 ]
ret i8* %9
}