#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 getc(int /*<<< orphan*/);
int /*<<< orphan*/ perror(char *);
int putc(int, int /*<<< orphan*/);
int /*<<< orphan*/ stdin;
int /*<<< orphan*/ stdout;
int main(int argc, char *argv[]) {
  int c;
  while ((c = getc(stdin)) != EOF) {
    if (putc(c, stdout) == EOF) {
      perror("putc error");
      return -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    0x2e9b(%rip),%rax
mov    (%rax),%edi
call   1050 <getc@plt>
mov    %eax,-0x14(%rbp)
mov    0x2e82(%rip),%rcx
cmp    (%rcx),%eax
je     11a3 <main+0x73>
mov    -0x14(%rbp),%edi
mov    0x2e60(%rip),%rax
mov    (%rax),%esi
call   1030 <putc@plt>
mov    0x2e62(%rip),%rcx
cmp    (%rcx),%eax
jne    119e <main+0x6e>
lea    0xe73(%rip),%rdi
call   1040 <perror@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    11aa <main+0x7a>
jmp    1146 <main+0x16>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
mov    0x2eac(%rip),%r14
mov    0x2e9d(%rip),%rbx
mov    0x2e86(%rip),%r15
nopw   0x0(%rax,%rax,1)
mov    (%r14),%edi
call   1050 <getc@plt>
cmp    (%rbx),%eax
je     117d <main+0x4d>
mov    (%r15),%esi
mov    %eax,%edi
call   1030 <putc@plt>
cmp    (%rbx),%eax
jne    1150 <main+0x20>
lea    0xe8f(%rip),%rdi
call   1040 <perror@plt>
mov    $0xffffffff,%eax
jmp    117f <main+0x4f>
xor    %eax,%eax
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@stdin = global i32 0
@EOF = global i32 0
@stdout = global i32 0
@.str = [11 x i8] c"putc error\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 = %20, %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 %21
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 %20
18: ; preds = %12
%19 = call i32 @perror(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0))
store i32 -1, i32* %3
br label %22
20: ; preds = %12
br label %7
21: ; preds = %7
store i32 0, i32* %3
br label %22
22: ; preds = %21, %18
%23 = load i32, i32* %3
ret i32 %23
}

LLVM IR (-O2):
@stdin = global i32 0
@EOF = global i32 0
@stdout = global i32 0
@.str = [11 x i8] c"putc error\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 %15, 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 = tail call i32 @perror(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0))
br label %15
15: ; preds = %3, %13
%16 = phi i32 [ -1, %13 ], [ 0, %3 ]
ret i32 %16
}