#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 *);
int /*<<< orphan*/ *strstr(char *, char *);
int is_eom(char *message) {
  if (strlen(message) == 4) {
    if (strstr(message, "end\n") != NULL) {
      return 1;
    }
  }
  if (strstr(message, "\nend\0") != NULL) {
    return 1;
  }
  return 0;
}


x86 assembly (clang, -O0):
<is_eom>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
call   1030 <strlen@plt>
cmp    $0x4,%eax
jne    1169 <is_eom+0x49>
mov    -0x10(%rbp),%rdi
lea    0xeb7(%rip),%rsi
call   1040 <strstr@plt>
cmp    $0x0,%rax
je     1164 <is_eom+0x44>
movl   $0x1,-0x4(%rbp)
jmp    1196 <is_eom+0x76>
jmp    1169 <is_eom+0x49>
mov    -0x10(%rbp),%rdi
lea    0xe91(%rip),%rsi
call   1040 <strstr@plt>
cmp    $0x0,%rax
je     118f <is_eom+0x6f>
movl   $0x1,-0x4(%rbp)
jmp    1196 <is_eom+0x76>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<is_eom>:
push   %rbx
mov    %rdi,%rbx
call   1030 <strlen@plt>
cmp    $0x4,%eax
jne    114c <is_eom+0x2c>
lea    0xecb(%rip),%rsi
mov    %rbx,%rdi
call   1040 <strstr@plt>
mov    %rax,%rcx
mov    $0x1,%eax
test   %rcx,%rcx
je     114c <is_eom+0x2c>
pop    %rbx
ret
lea    0xeb2(%rip),%rsi
mov    %rbx,%rdi
call   1040 <strstr@plt>
mov    %rax,%rcx
xor    %eax,%eax
test   %rcx,%rcx
setne  %al
pop    %rbx
ret

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

LLVM IR (-O2):
@.str = [5 x i8] c"end\0A\00"
@.str.1 = [6 x i8] c"\0Aend\00\00"
define i32 @is_eom(i8* %0) {
%2 = tail call i32 @strlen(i8* %0)
%3 = icmp eq i32 %2, 4
br i1 %3, label %4, label %7
4: ; preds = %1
%5 = tail call i32* @strstr(i8* dereferenceable(1) %0, i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0))
%6 = icmp eq i32* %5, null
br i1 %6, label %7, label %11
7: ; preds = %4, %1
%8 = tail call i32* @strstr(i8* dereferenceable(1) %0, i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0))
%9 = icmp ne i32* %8, null
%10 = zext i1 %9 to i32
br label %11
11: ; preds = %7, %4
%12 = phi i32 [ 1, %4 ], [ %10, %7 ]
ret i32 %12
}