#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*/ fgets(char *, int, int /*<<< orphan*/);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ stdin;
int strlen(char *);
int main(void) {
  char buf[256];
  fgets(buf, 256, stdin);
  if (buf[strlen(buf) - 1] == '\n') {
    buf[strlen(buf) - 1] = '\0';
  }
  printf("-----dest start-----\n");
  printf("%s\n", buf);
  printf("-----dest end-----\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x110,%rsp
movl   $0x0,-0x4(%rbp)
lea    -0x110(%rbp),%rdi
mov    0x2e98(%rip),%rax
mov    (%rax),%edx
mov    $0x100,%esi
call   1050 <fgets@plt>
lea    -0x110(%rbp),%rdi
call   1030 <strlen@plt>
sub    $0x1,%eax
cltq
movsbl -0x110(%rbp,%rax,1),%eax
ff
cmp    $0xa,%eax
jne    1197 <main+0x67>
lea    -0x110(%rbp),%rdi
call   1030 <strlen@plt>
sub    $0x1,%eax
cltq
movb   $0x0,-0x110(%rbp,%rax,1)
lea    0xe62(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    -0x110(%rbp),%rsi
lea    0xe63(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xe59(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x110,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x100,%rsp
mov    0x2ea9(%rip),%rax
mov    (%rax),%edx
mov    %rsp,%rbx
mov    %rbx,%rdi
mov    $0x100,%esi
call   1050 <fgets@plt>
mov    %rbx,%rdi
call   1040 <strlen@plt>
cltq
cmpb   $0xa,-0x1(%rax,%rbx,1)
jne    1171 <main+0x41>
mov    %rbx,%rdi
call   1040 <strlen@plt>
cltq
movb   $0x0,-0x1(%rax,%rbx,1)
lea    0xe88(%rip),%rdi
call   1030 <puts@plt>
mov    %rsp,%rdi
call   1030 <puts@plt>
lea    0xe89(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
add    $0x100,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@stdin = global i32 0
@.str = [22 x i8] c"-----dest start-----\0A\00"
@.str.1 = [4 x i8] c"%s\0A\00"
@.str.2 = [20 x i8] c"-----dest end-----\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [256 x i8]
store i32 0, i32* %1
%3 = getelementptr inbounds [256 x i8], [256 x i8]* %2, i64 0, i64 0
%4 = load i32, i32* @stdin
%5 = call i32 @fgets(i8* %3, i32 256, i32 %4)
%6 = getelementptr inbounds [256 x i8], [256 x i8]* %2, i64 0, i64 0
%7 = call i32 @strlen(i8* %6)
%8 = sub nsw i32 %7, 1
%9 = sext i32 %8 to i64
%10 = getelementptr inbounds [256 x i8], [256 x i8]* %2, i64 0, i64 %9
%11 = load i8, i8* %10
%12 = sext i8 %11 to i32
%13 = icmp eq i32 %12, 10
br i1 %13, label %14, label %20
14: ; preds = %0
%15 = getelementptr inbounds [256 x i8], [256 x i8]* %2, i64 0, i64 0
%16 = call i32 @strlen(i8* %15)
%17 = sub nsw i32 %16, 1
%18 = sext i32 %17 to i64
%19 = getelementptr inbounds [256 x i8], [256 x i8]* %2, i64 0, i64 %18
store i8 0, i8* %19
br label %20
20: ; preds = %14, %0
%21 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0))
%22 = getelementptr inbounds [256 x i8], [256 x i8]* %2, i64 0, i64 0
%23 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %22)
%24 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@stdin = global i32 0
@str = [21 x i8] c"-----dest start-----\00"
@str.3 = [19 x i8] c"-----dest end-----\00"
define i32 @main() {
%1 = alloca [256 x i8]
%2 = getelementptr inbounds [256 x i8], [256 x i8]* %1, i64 0, i64 0
%3 = load i32, i32* @stdin
%4 = call i32 @fgets(i8* %2, i32 256, i32 %3)
%5 = call i32 @strlen(i8* %2)
%6 = add nsw i32 %5, -1
%7 = sext i32 %6 to i64
%8 = getelementptr inbounds [256 x i8], [256 x i8]* %1, i64 0, i64 %7
%9 = load i8, i8* %8
%10 = icmp eq i8 %9, 10
br i1 %10, label %11, label %16
11: ; preds = %0
%12 = call i32 @strlen(i8* %2)
%13 = add nsw i32 %12, -1
%14 = sext i32 %13 to i64
%15 = getelementptr inbounds [256 x i8], [256 x i8]* %1, i64 0, i64 %14
store i8 0, i8* %15
br label %16
16: ; preds = %11, %0
%17 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @str, i64 0, i64 0))
%18 = call i32 @puts(i8* %2)
%19 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @str.3, i64 0, i64 0))
ret i32 0
}