#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 const *);
const char *streol(const char *eol) {
  if (!strcmp("DOS", eol))
    return "\r\n";
  if (!strcmp("UNIX", eol))
    return "\n";
  return NULL;
}


x86 assembly (clang, -O0):
<streol>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rsi
lea    0xed9(%rip),%rdi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    1145 <streol+0x35>
lea    0xec8(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1176 <streol+0x66>
mov    -0x10(%rbp),%rsi
lea    0xeb7(%rip),%rdi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    116e <streol+0x5e>
lea    0xea0(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1176 <streol+0x66>
movq   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%rax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<streol>:
push   %rbx
mov    %rdi,%rbx
lea    0xee5(%rip),%rdi
mov    %rbx,%rsi
call   1030 <strcmp@plt>
test   %eax,%eax
je     1149 <streol+0x39>
lea    0xed9(%rip),%rdi
mov    %rbx,%rsi
call   1030 <strcmp@plt>
mov    %eax,%ecx
xor    %eax,%eax
test   %ecx,%ecx
lea    0xec2(%rip),%rcx
cmove  %rcx,%rax
pop    %rbx
ret
lea    0xeb4(%rip),%rax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [4 x i8] c"DOS\00"
@.str.1 = [3 x i8] c"\0D\0A\00"
@.str.2 = [5 x i8] c"UNIX\00"
@.str.3 = [2 x i8] c"\0A\00"
define i8* @streol(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
store i8* %0, i8** %3
%4 = load i8*, i8** %3
%5 = call i32 @strcmp(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i8* %4)
%6 = icmp ne i32 %5, 0
br i1 %6, label %8, label %7
7: ; preds = %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %14
8: ; preds = %1
%9 = load i8*, i8** %3
%10 = call i32 @strcmp(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0), i8* %9)
%11 = icmp ne i32 %10, 0
br i1 %11, label %13, label %12
12: ; preds = %8
store i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %14
13: ; preds = %8
store i8* null, i8** %2
br label %14
14: ; preds = %13, %12, %7
%15 = load i8*, i8** %2
ret i8* %15
}

LLVM IR (-O2):
@.str = [4 x i8] c"DOS\00"
@.str.1 = [3 x i8] c"\0D\0A\00"
@.str.2 = [5 x i8] c"UNIX\00"
@.str.3 = [2 x i8] c"\0A\00"
define i8* @streol(i8* nocapture %0) {
%2 = tail call i32 @strcmp(i8* dereferenceable(4) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i8* dereferenceable(1) %0)
%3 = icmp eq i32 %2, 0
br i1 %3, label %8, label %4
4: ; preds = %1
%5 = tail call i32 @strcmp(i8* dereferenceable(5) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0), i8* dereferenceable(1) %0)
%6 = icmp eq i32 %5, 0
%7 = select i1 %6, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0), i8* null
br label %8
8: ; preds = %4, %1
%9 = phi i8* [ getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), %1 ], [ %7, %4 ]
ret i8* %9
}