#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 */
int strlen(char const *);
scalar_t__ tolower(unsigned char const);
int jdns_domain_cmp(const unsigned char *a, const unsigned char *b) {
  int n;
  int len_a;
  len_a = strlen((const char *)a);
  if (len_a != (int)strlen((const char *)b))
    return 0;
  for (n = 0; n < len_a; ++n) {
    if (tolower(a[n]) != tolower(b[n]))
      return 0;
  }
  return 1;
}


x86 assembly (clang, -O0):
<jdns_domain_cmp>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
mov    -0x10(%rbp),%rdi
call   1030 <strlen@plt>
mov    %eax,-0x20(%rbp)
mov    -0x20(%rbp),%eax
mov    %eax,-0x24(%rbp)
mov    -0x18(%rbp),%rdi
call   1030 <strlen@plt>
mov    %eax,%ecx
mov    -0x24(%rbp),%eax
cmp    %ecx,%eax
je     1164 <jdns_domain_cmp+0x44>
movl   $0x0,-0x4(%rbp)
jmp    11d3 <jdns_domain_cmp+0xb3>
movl   $0x0,-0x1c(%rbp)
mov    -0x1c(%rbp),%eax
cmp    -0x20(%rbp),%eax
jge    11cc <jdns_domain_cmp+0xac>
mov    -0x10(%rbp),%rax
movslq -0x1c(%rbp),%rcx
movzbl (%rax,%rcx,1),%edi
call   1040 <tolower@plt>
mov    %rax,-0x30(%rbp)
mov    -0x18(%rbp),%rax
movslq -0x1c(%rbp),%rcx
movzbl (%rax,%rcx,1),%edi
call   1040 <tolower@plt>
mov    %rax,%rcx
mov    -0x30(%rbp),%rax
cmp    %rcx,%rax
je     11b9 <jdns_domain_cmp+0x99>
movl   $0x0,-0x4(%rbp)
jmp    11d3 <jdns_domain_cmp+0xb3>
jmp    11be <jdns_domain_cmp+0x9e>
mov    -0x1c(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x1c(%rbp)
jmp    116b <jdns_domain_cmp+0x4b>
movl   $0x1,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<jdns_domain_cmp>:
push   %rbp
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
push   %rax
mov    %rsi,%r14
mov    %rdi,%r12
call   1030 <strlen@plt>
mov    %eax,%ebp
mov    %r14,%rdi
call   1030 <strlen@plt>
xor    %r15d,%r15d
cmp    %eax,%ebp
jne    118a <jdns_domain_cmp+0x6a>
mov    $0x1,%r15d
test   %ebp,%ebp
jle    118a <jdns_domain_cmp+0x6a>
mov    %ebp,%r13d
xor    %ebx,%ebx
cs nopw 0x0(%rax,%rax,1)
movzbl (%r12,%rbx,1),%edi
call   1040 <tolower@plt>
mov    %rax,%rbp
movzbl (%r14,%rbx,1),%edi
call   1040 <tolower@plt>
cmp    %rax,%rbp
jne    1187 <jdns_domain_cmp+0x67>
add    $0x1,%rbx
cmp    %rbx,%r13
jne    1160 <jdns_domain_cmp+0x40>
jmp    118a <jdns_domain_cmp+0x6a>
xor    %r15d,%r15d
mov    %r15d,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
define i32 @jdns_domain_cmp(i8* %0, i8* %1) {
%3 = alloca i32
%4 = alloca i8*
%5 = alloca i8*
%6 = alloca i32
%7 = alloca i32
store i8* %0, i8** %4
store i8* %1, i8** %5
%8 = load i8*, i8** %4
%9 = call i32 @strlen(i8* %8)
store i32 %9, i32* %7
%10 = load i32, i32* %7
%11 = load i8*, i8** %5
%12 = call i32 @strlen(i8* %11)
%13 = icmp ne i32 %10, %12
br i1 %13, label %14, label %15
14: ; preds = %2
store i32 0, i32* %3
br label %40
15: ; preds = %2
store i32 0, i32* %6
br label %16
16: ; preds = %36, %15
%17 = load i32, i32* %6
%18 = load i32, i32* %7
%19 = icmp slt i32 %17, %18
br i1 %19, label %20, label %39
20: ; preds = %16
%21 = load i8*, i8** %4
%22 = load i32, i32* %6
%23 = sext i32 %22 to i64
%24 = getelementptr inbounds i8, i8* %21, i64 %23
%25 = load i8, i8* %24
%26 = call i64 @tolower(i8 zeroext %25)
%27 = load i8*, i8** %5
%28 = load i32, i32* %6
%29 = sext i32 %28 to i64
%30 = getelementptr inbounds i8, i8* %27, i64 %29
%31 = load i8, i8* %30
%32 = call i64 @tolower(i8 zeroext %31)
%33 = icmp ne i64 %26, %32
br i1 %33, label %34, label %35
34: ; preds = %20
store i32 0, i32* %3
br label %40
35: ; preds = %20
br label %36
36: ; preds = %35
%37 = load i32, i32* %6
%38 = add nsw i32 %37, 1
store i32 %38, i32* %6
br label %16
39: ; preds = %16
store i32 1, i32* %3
br label %40
40: ; preds = %39, %34, %14
%41 = load i32, i32* %3
ret i32 %41
}

LLVM IR (-O2):
define i32 @jdns_domain_cmp(i8* %0, i8* %1) {
%3 = tail call i32 @strlen(i8* %0)
%4 = tail call i32 @strlen(i8* %1)
%5 = icmp eq i32 %3, %4
br i1 %5, label %6, label %22
6: ; preds = %2
%7 = icmp sgt i32 %3, 0
br i1 %7, label %8, label %22
8: ; preds = %6
%9 = zext i32 %3 to i64
br label %12
10: ; preds = %12
%11 = icmp eq i64 %21, %9
br i1 %11, label %22, label %12
12: ; preds = %8, %10
%13 = phi i64 [ 0, %8 ], [ %21, %10 ]
%14 = getelementptr inbounds i8, i8* %0, i64 %13
%15 = load i8, i8* %14
%16 = tail call i64 @tolower(i8 zeroext %15)
%17 = getelementptr inbounds i8, i8* %1, i64 %13
%18 = load i8, i8* %17
%19 = tail call i64 @tolower(i8 zeroext %18)
%20 = icmp eq i64 %16, %19
%21 = add nuw nsw i64 %13, 1
br i1 %20, label %10, label %22
22: ; preds = %12, %10, %6, %2
%23 = phi i32 [ 0, %2 ], [ 1, %6 ], [ 0, %12 ], [ 1, %10 ]
ret i32 %23
}