#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
scalar_t__ strncmp(char const *, char *, int);
int get_hash_id(const char *password) {
  int hash_id = 0;
  if (strncmp(password, "$1$", 3) == 0)
    hash_id = 1;
  else if (strncmp(password, "$5$", 3) == 0)
    hash_id = 5;
  else if (strncmp(password, "$6$", 3) == 0)
    hash_id = 6;
  return hash_id;
}


x86 assembly (clang, -O0):
<get_hash_id>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
movl   $0x0,-0xc(%rbp)
mov    -0x8(%rbp),%rdi
lea    0xed2(%rip),%rsi
mov    $0x3,%edx
call   1030 <strncmp@plt>
cmp    $0x0,%rax
jne    114e <get_hash_id+0x3e>
movl   $0x1,-0xc(%rbp)
jmp    11a9 <get_hash_id+0x99>
mov    -0x8(%rbp),%rdi
lea    0xeab(%rip),%rsi
mov    $0x3,%edx
call   1030 <strncmp@plt>
cmp    $0x0,%rax
jne    1179 <get_hash_id+0x69>
movl   $0x5,-0xc(%rbp)
jmp    11a4 <get_hash_id+0x94>
mov    -0x8(%rbp),%rdi
lea    0xe84(%rip),%rsi
mov    $0x3,%edx
call   1030 <strncmp@plt>
cmp    $0x0,%rax
jne    119f <get_hash_id+0x8f>
movl   $0x6,-0xc(%rbp)
jmp    11a4 <get_hash_id+0x94>
jmp    11a9 <get_hash_id+0x99>
mov    -0xc(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<get_hash_id>:
push   %rbx
mov    %rdi,%rbx
lea    0xee5(%rip),%rsi
mov    $0x3,%edx
call   1030 <strncmp@plt>
test   %rax,%rax
je     1166 <get_hash_id+0x56>
lea    0xed3(%rip),%rsi
mov    %rbx,%rdi
mov    $0x3,%edx
call   1030 <strncmp@plt>
test   %rax,%rax
je     116d <get_hash_id+0x5d>
lea    0xebe(%rip),%rsi
mov    %rbx,%rdi
mov    $0x3,%edx
call   1030 <strncmp@plt>
xor    %ecx,%ecx
test   %rax,%rax
mov    $0x6,%eax
cmovne %ecx,%eax
pop    %rbx
ret
mov    $0x1,%eax
pop    %rbx
ret
mov    $0x5,%eax
pop    %rbx
ret

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

LLVM IR (-O2):
@.str = [4 x i8] c"$1$\00"
@.str.1 = [4 x i8] c"$5$\00"
@.str.2 = [4 x i8] c"$6$\00"
define i32 @get_hash_id(i8* %0) {
%2 = tail call i64 @strncmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 3)
%3 = icmp eq i64 %2, 0
br i1 %3, label %11, label %4
4: ; preds = %1
%5 = tail call i64 @strncmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 3)
%6 = icmp eq i64 %5, 0
br i1 %6, label %11, label %7
7: ; preds = %4
%8 = tail call i64 @strncmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 3)
%9 = icmp eq i64 %8, 0
%10 = select i1 %9, i32 6, i32 0
br label %11
11: ; preds = %7, %4, %1
%12 = phi i32 [ 1, %1 ], [ 5, %4 ], [ %10, %7 ]
ret i32 %12
}