#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 EOF;
int /*<<< orphan*/ exit(int);
scalar_t__ ferror(int /*<<< orphan*/);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *);
int getc(int /*<<< orphan*/);
int putc(int, int /*<<< orphan*/);
int /*<<< orphan*/ stderr;
int /*<<< orphan*/ stdin;
int /*<<< orphan*/ stdout;
int main(int argc, char **argv) {
  int c;
  while ((c = getc(stdin)) != EOF)
    if (putc(c, stdout) == EOF) {
      fprintf(stderr, "write error\n");
      exit(1);
    }
  if (ferror(stdin)) {
    fprintf(stderr, "read error\n");
    exit(1);
  }
  return (0);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    0x2e7b(%rip),%rax
mov    (%rax),%edi
call   1070 <getc@plt>
mov    %eax,-0x14(%rbp)
mov    0x2e62(%rip),%rcx
cmp    (%rcx),%eax
je     11ca <main+0x7a>
mov    -0x14(%rbp),%edi
mov    0x2e38(%rip),%rax
mov    (%rax),%esi
call   1040 <putc@plt>
mov    0x2e42(%rip),%rcx
cmp    (%rcx),%eax
jne    11c5 <main+0x75>
mov    0x2e23(%rip),%rax
mov    (%rax),%edi
lea    0xe4a(%rip),%rsi
call   1050 <fprintf@plt>
mov    $0x1,%edi
call   1060 <exit@plt>
jmp    1166 <main+0x16>
mov    0x2e17(%rip),%rax
mov    (%rax),%edi
call   1030 <ferror@plt>
cmp    $0x0,%rax
je     1201 <main+0xb1>
mov    0x2de7(%rip),%rax
mov    (%rax),%edi
lea    0xe1b(%rip),%rsi
call   1050 <fprintf@plt>
mov    $0x1,%edi
call   1060 <exit@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
mov    0x2e8c(%rip),%r14
mov    0x2e7d(%rip),%rbx
mov    0x2e5e(%rip),%r15
nopw   0x0(%rax,%rax,1)
mov    (%r14),%edi
call   1070 <getc@plt>
cmp    (%rbx),%eax
je     11a9 <main+0x59>
mov    (%r15),%esi
mov    %eax,%edi
call   1040 <putc@plt>
cmp    (%rbx),%eax
jne    1170 <main+0x20>
mov    0x2e3f(%rip),%rax
mov    (%rax),%edi
lea    0xe66(%rip),%rsi
call   1050 <fprintf@plt>
mov    $0x1,%edi
call   1060 <exit@plt>
mov    (%r14),%edi
call   1030 <ferror@plt>
test   %rax,%rax
jne    11be <main+0x6e>
xor    %eax,%eax
pop    %rbx
pop    %r14
pop    %r15
ret
mov    0x2e0b(%rip),%rax
mov    (%rax),%edi
lea    0xe3f(%rip),%rsi
jmp    119a <main+0x4a>

LLVM IR (-O0):
@stdin = global i32 0
@EOF = global i32 0
@stdout = global i32 0
@stderr = global i32 0
@.str = [13 x i8] c"write error\0A\00"
@.str.1 = [12 x i8] c"read error\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
br label %7
7: ; preds = %22, %2
%8 = load i32, i32* @stdin
%9 = call i32 @getc(i32 %8)
store i32 %9, i32* %6
%10 = load i32, i32* @EOF
%11 = icmp ne i32 %9, %10
br i1 %11, label %12, label %23
12: ; preds = %7
%13 = load i32, i32* %6
%14 = load i32, i32* @stdout
%15 = call i32 @putc(i32 %13, i32 %14)
%16 = load i32, i32* @EOF
%17 = icmp eq i32 %15, %16
br i1 %17, label %18, label %22
18: ; preds = %12
%19 = load i32, i32* @stderr
%20 = call i32 @fprintf(i32 %19, i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0))
%21 = call i32 @exit(i32 1)
unreachable
22: ; preds = %12
br label %7
23: ; preds = %7
%24 = load i32, i32* @stdin
%25 = call i64 @ferror(i32 %24)
%26 = icmp ne i64 %25, 0
br i1 %26, label %27, label %31
27: ; preds = %23
%28 = load i32, i32* @stderr
%29 = call i32 @fprintf(i32 %28, i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0))
%30 = call i32 @exit(i32 1)
unreachable
31: ; preds = %23
ret i32 0
}

LLVM IR (-O2):
@stdin = global i32 0
@EOF = global i32 0
@stdout = global i32 0
@stderr = global i32 0
@.str = [13 x i8] c"write error\0A\00"
@.str.1 = [12 x i8] c"read error\0A\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
br label %3
3: ; preds = %8, %2
%4 = load i32, i32* @stdin
%5 = tail call i32 @getc(i32 %4)
%6 = load i32, i32* @EOF
%7 = icmp eq i32 %5, %6
br i1 %7, label %17, label %8
8: ; preds = %3
%9 = load i32, i32* @stdout
%10 = tail call i32 @putc(i32 %5, i32 %9)
%11 = load i32, i32* @EOF
%12 = icmp eq i32 %10, %11
br i1 %12, label %13, label %3
13: ; preds = %8
%14 = load i32, i32* @stderr
%15 = tail call i32 @fprintf(i32 %14, i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0))
%16 = tail call i32 @exit(i32 1)
unreachable
17: ; preds = %3
%18 = load i32, i32* @stdin
%19 = tail call i64 @ferror(i32 %18)
%20 = icmp eq i64 %19, 0
br i1 %20, label %25, label %21
21: ; preds = %17
%22 = load i32, i32* @stderr
%23 = tail call i32 @fprintf(i32 %22, i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0))
%24 = tail call i32 @exit(i32 1)
unreachable
25: ; preds = %17
ret i32 0
}