#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 /*<<< orphan*/ strcmp(char *, char *);
int isLocalHost(char *host) {
  if (!host || !*host)
    return 1;
  if (!strcmp(host, "localhost"))
    return 1;
  if (!strcmp(host, "127.0.0.1"))
    return 1;
  if (!strcmp(host, "::"))
    return 1;
  if (!strcmp(host, "::1"))
    return 1;
  if (!strcmp(host, "[::1]"))
    return 1;
  return 0;
}


x86 assembly (clang, -O0):
<isLocalHost>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x10(%rbp)
cmpq   $0x0,-0x10(%rbp)
je     1134 <isLocalHost+0x24>
mov    -0x10(%rbp),%rax
cmpb   $0x0,(%rax)
jne    1140 <isLocalHost+0x30>
movl   $0x1,-0x4(%rbp)
jmp    1200 <isLocalHost+0xf0>
mov    -0x10(%rbp),%rdi
lea    0xeb5(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    1165 <isLocalHost+0x55>
movl   $0x1,-0x4(%rbp)
jmp    1200 <isLocalHost+0xf0>
mov    -0x10(%rbp),%rdi
lea    0xe9a(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    118a <isLocalHost+0x7a>
movl   $0x1,-0x4(%rbp)
jmp    1200 <isLocalHost+0xf0>
mov    -0x10(%rbp),%rdi
lea    0xe7f(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    11af <isLocalHost+0x9f>
movl   $0x1,-0x4(%rbp)
jmp    1200 <isLocalHost+0xf0>
mov    -0x10(%rbp),%rdi
lea    0xe5d(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    11d4 <isLocalHost+0xc4>
movl   $0x1,-0x4(%rbp)
jmp    1200 <isLocalHost+0xf0>
mov    -0x10(%rbp),%rdi
lea    0xe3c(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    11f9 <isLocalHost+0xe9>
movl   $0x1,-0x4(%rbp)
jmp    1200 <isLocalHost+0xf0>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<isLocalHost>:
push   %rbp
push   %rbx
push   %rax
mov    $0x1,%ebp
test   %rdi,%rdi
je     1188 <isLocalHost+0x78>
mov    %rdi,%rbx
cmpb   $0x0,(%rdi)
je     1188 <isLocalHost+0x78>
lea    0xed4(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     1188 <isLocalHost+0x78>
lea    0xecb(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     1188 <isLocalHost+0x78>
lea    0xec2(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     1188 <isLocalHost+0x78>
lea    0xeb2(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     1188 <isLocalHost+0x78>
lea    0xea3(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
xor    %ebp,%ebp
test   %eax,%eax
sete   %bpl
mov    %ebp,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [10 x i8] c"localhost\00"
@.str.1 = [10 x i8] c"127.0.0.1\00"
@.str.2 = [3 x i8] c"::\00"
@.str.3 = [4 x i8] c"::1\00"
@.str.4 = [6 x i8] c"[::1]\00"
define i32 @isLocalHost(i8* %0) {
%2 = alloca i32
%3 = alloca i8*
store i8* %0, i8** %3
%4 = load i8*, i8** %3
%5 = icmp ne i8* %4, null
br i1 %5, label %6, label %10
6: ; preds = %1
%7 = load i8*, i8** %3
%8 = load i8, i8* %7
%9 = icmp ne i8 %8, 0
br i1 %9, label %11, label %10
10: ; preds = %6, %1
store i32 1, i32* %2
br label %37
11: ; preds = %6
%12 = load i8*, i8** %3
%13 = call i32 @strcmp(i8* %12, i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0))
%14 = icmp ne i32 %13, 0
br i1 %14, label %16, label %15
15: ; preds = %11
store i32 1, i32* %2
br label %37
16: ; preds = %11
%17 = load i8*, i8** %3
%18 = call i32 @strcmp(i8* %17, i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0))
%19 = icmp ne i32 %18, 0
br i1 %19, label %21, label %20
20: ; preds = %16
store i32 1, i32* %2
br label %37
21: ; preds = %16
%22 = load i8*, i8** %3
%23 = call i32 @strcmp(i8* %22, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0))
%24 = icmp ne i32 %23, 0
br i1 %24, label %26, label %25
25: ; preds = %21
store i32 1, i32* %2
br label %37
26: ; preds = %21
%27 = load i8*, i8** %3
%28 = call i32 @strcmp(i8* %27, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0))
%29 = icmp ne i32 %28, 0
br i1 %29, label %31, label %30
30: ; preds = %26
store i32 1, i32* %2
br label %37
31: ; preds = %26
%32 = load i8*, i8** %3
%33 = call i32 @strcmp(i8* %32, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.4, i64 0, i64 0))
%34 = icmp ne i32 %33, 0
br i1 %34, label %36, label %35
35: ; preds = %31
store i32 1, i32* %2
br label %37
36: ; preds = %31
store i32 0, i32* %2
br label %37
37: ; preds = %36, %35, %30, %25, %20, %15, %10
%38 = load i32, i32* %2
ret i32 %38
}

LLVM IR (-O2):
@.str = [10 x i8] c"localhost\00"
@.str.1 = [10 x i8] c"127.0.0.1\00"
@.str.2 = [3 x i8] c"::\00"
@.str.3 = [4 x i8] c"::1\00"
@.str.4 = [6 x i8] c"[::1]\00"
define i32 @isLocalHost(i8* %0) {
%2 = icmp eq i8* %0, null
br i1 %2, label %22, label %3
3: ; preds = %1
%4 = load i8, i8* %0
%5 = icmp eq i8 %4, 0
br i1 %5, label %22, label %6
6: ; preds = %3
%7 = tail call i32 @strcmp(i8* %0, i8* dereferenceable(10) getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0))
%8 = icmp eq i32 %7, 0
br i1 %8, label %22, label %9
9: ; preds = %6
%10 = tail call i32 @strcmp(i8* %0, i8* dereferenceable(10) getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0))
%11 = icmp eq i32 %10, 0
br i1 %11, label %22, label %12
12: ; preds = %9
%13 = tail call i32 @strcmp(i8* %0, i8* dereferenceable(3) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0))
%14 = icmp eq i32 %13, 0
br i1 %14, label %22, label %15
15: ; preds = %12
%16 = tail call i32 @strcmp(i8* %0, i8* dereferenceable(4) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0))
%17 = icmp eq i32 %16, 0
br i1 %17, label %22, label %18
18: ; preds = %15
%19 = tail call i32 @strcmp(i8* %0, i8* dereferenceable(6) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.4, i64 0, i64 0))
%20 = icmp eq i32 %19, 0
%21 = zext i1 %20 to i32
br label %22
22: ; preds = %18, %15, %12, %9, %6, %1, %3
%23 = phi i32 [ 1, %3 ], [ 1, %1 ], [ 1, %6 ], [ 1, %9 ], [ 1, %12 ], [ 1, %15 ], [ %21, %18 ]
ret i32 %23
}