int MSN_list2int(list)
char *list;
{
  int ret;
  if (strcmp(list, "FL") == 0)
    ret = 1;
  else if (strcmp(list, "AL") == 0)
    ret = 2;
  else if (strcmp(list, "BL") == 0)
    ret = 4;
  else if (strcmp(list, "RL") == 0)
    ret = 8;
  else if (strcmp(list, "PL") == 0)
    ret = 16;
  else
    ret = 0;
  return ret;
}


x86 assembly (clang, -O0):
<MSN_list2int>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rdi
lea    0xed9(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    1141 <MSN_list2int+0x31>
movl   $0x1,-0xc(%rbp)
jmp    11f0 <MSN_list2int+0xe0>
mov    -0x8(%rbp),%rdi
lea    0xeb7(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    1166 <MSN_list2int+0x56>
movl   $0x2,-0xc(%rbp)
jmp    11eb <MSN_list2int+0xdb>
mov    -0x8(%rbp),%rdi
lea    0xe95(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    118b <MSN_list2int+0x7b>
movl   $0x4,-0xc(%rbp)
jmp    11e6 <MSN_list2int+0xd6>
mov    -0x8(%rbp),%rdi
lea    0xe73(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    11b0 <MSN_list2int+0xa0>
movl   $0x8,-0xc(%rbp)
jmp    11e1 <MSN_list2int+0xd1>
mov    -0x8(%rbp),%rdi
lea    0xe51(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    11d5 <MSN_list2int+0xc5>
movl   $0x10,-0xc(%rbp)
jmp    11dc <MSN_list2int+0xcc>
movl   $0x0,-0xc(%rbp)
jmp    11e1 <MSN_list2int+0xd1>
jmp    11e6 <MSN_list2int+0xd6>
jmp    11eb <MSN_list2int+0xdb>
jmp    11f0 <MSN_list2int+0xe0>
mov    -0xc(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<MSN_list2int>:
push   %rbx
mov    %rdi,%rbx
lea    0xee5(%rip),%rsi
call   1030 <strcmp@plt>
test   %eax,%eax
je     117a <MSN_list2int+0x6a>
lea    0xed8(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     1181 <MSN_list2int+0x71>
lea    0xec8(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     1188 <MSN_list2int+0x78>
lea    0xeb8(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     118f <MSN_list2int+0x7f>
lea    0xea8(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
mov    %eax,%ecx
xor    %eax,%eax
test   %ecx,%ecx
sete   %al
shl    $0x4,%eax
pop    %rbx
ret
mov    $0x1,%eax
pop    %rbx
ret
mov    $0x2,%eax
pop    %rbx
ret
mov    $0x4,%eax
pop    %rbx
ret
mov    $0x8,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [3 x i8] c"FL\00"
@.str.1 = [3 x i8] c"AL\00"
@.str.2 = [3 x i8] c"BL\00"
@.str.3 = [3 x i8] c"RL\00"
@.str.4 = [3 x i8] c"PL\00"
define i32 @MSN_list2int(i8* %0) {
%2 = alloca i8*
%3 = alloca i32
store i8* %0, i8** %2
%4 = load i8*, i8** %2
%5 = call i32 @strcmp(i8* %4, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
%6 = icmp eq i32 %5, 0
br i1 %6, label %7, label %8
7: ; preds = %1
store i32 1, i32* %3
br label %33
8: ; preds = %1
%9 = load i8*, i8** %2
%10 = call i32 @strcmp(i8* %9, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
%11 = icmp eq i32 %10, 0
br i1 %11, label %12, label %13
12: ; preds = %8
store i32 2, i32* %3
br label %32
13: ; preds = %8
%14 = load i8*, i8** %2
%15 = call i32 @strcmp(i8* %14, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0))
%16 = icmp eq i32 %15, 0
br i1 %16, label %17, label %18
17: ; preds = %13
store i32 4, i32* %3
br label %31
18: ; preds = %13
%19 = load i8*, i8** %2
%20 = call i32 @strcmp(i8* %19, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0))
%21 = icmp eq i32 %20, 0
br i1 %21, label %22, label %23
22: ; preds = %18
store i32 8, i32* %3
br label %30
23: ; preds = %18
%24 = load i8*, i8** %2
%25 = call i32 @strcmp(i8* %24, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.4, i64 0, i64 0))
%26 = icmp eq i32 %25, 0
br i1 %26, label %27, label %28
27: ; preds = %23
store i32 16, i32* %3
br label %29
28: ; preds = %23
store i32 0, i32* %3
br label %29
29: ; preds = %28, %27
br label %30
30: ; preds = %29, %22
br label %31
31: ; preds = %30, %17
br label %32
32: ; preds = %31, %12
br label %33
33: ; preds = %32, %7
%34 = load i32, i32* %3
ret i32 %34
}

LLVM IR (-O2):
@.str = [3 x i8] c"FL\00"
@.str.1 = [3 x i8] c"AL\00"
@.str.2 = [3 x i8] c"BL\00"
@.str.3 = [3 x i8] c"RL\00"
@.str.4 = [3 x i8] c"PL\00"
define i32 @MSN_list2int(i8* nocapture %0) {
%2 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(3) getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
%3 = icmp eq i32 %2, 0
br i1 %3, label %17, label %4
4: ; preds = %1
%5 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(3) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
%6 = icmp eq i32 %5, 0
br i1 %6, label %17, label %7
7: ; preds = %4
%8 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(3) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0))
%9 = icmp eq i32 %8, 0
br i1 %9, label %17, label %10
10: ; preds = %7
%11 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(3) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0))
%12 = icmp eq i32 %11, 0
br i1 %12, label %17, label %13
13: ; preds = %10
%14 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(3) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.4, i64 0, i64 0))
%15 = icmp eq i32 %14, 0
%16 = select i1 %15, i32 16, i32 0
br label %17
17: ; preds = %13, %10, %7, %4, %1
%18 = phi i32 [ 1, %1 ], [ 2, %4 ], [ 4, %7 ], [ 8, %10 ], [ %16, %13 ]
ret i32 %18
}