#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 getchar();
int /*<<< orphan*/ putchar(int);
main() {
  int c, ns;
  while ((c = getchar()) != EOF) {
    if (c == ' ')
      ++ns;
    if (c != ' ')
      ns = 0;
    if (ns <= 1)
      putchar(c);
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    $0x0,%al
call   1040 <getchar@plt>
mov    %eax,-0x8(%rbp)
mov    0x2ea8(%rip),%rcx
cmp    (%rcx),%eax
je     1183 <main+0x63>
cmpl   $0x20,-0x8(%rbp)
jne    115b <main+0x3b>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
cmpl   $0x20,-0x8(%rbp)
je     116c <main+0x4c>
movl   $0x0,-0xc(%rbp)
cmpl   $0x1,-0xc(%rbp)
jg     117e <main+0x5e>
mov    -0x8(%rbp),%edi
call   1030 <putchar@plt>
jmp    112f <main+0xf>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r14
push   %rbx
xor    %r14d,%r14d
xor    %eax,%eax
call   1040 <getchar@plt>
mov    0x2eb3(%rip),%rbx
cmp    (%rbx),%eax
jne    1140 <main+0x20>
xor    %eax,%eax
pop    %rbx
pop    %r14
pop    %rbp
ret
jmp    115b <main+0x3b>
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
xor    %eax,%eax
call   1040 <getchar@plt>
cmp    (%rbx),%eax
je     1139 <main+0x19>
xor    %ecx,%ecx
cmp    $0x20,%eax
sete   %cl
add    %ecx,%ebp
cmp    $0x20,%eax
cmovne %r14d,%ebp
cmp    $0x1,%ebp
jg     1150 <main+0x30>
mov    %eax,%edi
call   1030 <putchar@plt>
jmp    1150 <main+0x30>

LLVM IR (-O0):
@EOF = global i32 0
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
br label %4
4: ; preds = %24, %0
%5 = call i32 (...) @getchar()
store i32 %5, i32* %2
%6 = load i32, i32* @EOF
%7 = icmp ne i32 %5, %6
br i1 %7, label %8, label %25
8: ; preds = %4
%9 = load i32, i32* %2
%10 = icmp eq i32 %9, 32
br i1 %10, label %11, label %14
11: ; preds = %8
%12 = load i32, i32* %3
%13 = add nsw i32 %12, 1
store i32 %13, i32* %3
br label %14
14: ; preds = %11, %8
%15 = load i32, i32* %2
%16 = icmp ne i32 %15, 32
br i1 %16, label %17, label %18
17: ; preds = %14
store i32 0, i32* %3
br label %18
18: ; preds = %17, %14
%19 = load i32, i32* %3
%20 = icmp sle i32 %19, 1
br i1 %20, label %21, label %24
21: ; preds = %18
%22 = load i32, i32* %2
%23 = call i32 @putchar(i32 %22)
br label %24
24: ; preds = %21, %18
br label %4
25: ; preds = %4
%26 = load i32, i32* %1
ret i32 %26
}

LLVM IR (-O2):
@EOF = global i32 0
define i32 @main() {
%1 = tail call i32 (...) @getchar()
%2 = load i32, i32* @EOF
%3 = icmp eq i32 %1, %2
br i1 %3, label %18, label %4
4: ; preds = %0, %14
%5 = phi i32 [ %15, %14 ], [ %1, %0 ]
%6 = phi i32 [ %10, %14 ], [ undef, %0 ]
%7 = icmp eq i32 %5, 32
%8 = zext i1 %7 to i32
%9 = add nsw i32 %6, %8
%10 = select i1 %7, i32 %9, i32 0
%11 = icmp slt i32 %10, 2
br i1 %11, label %12, label %14
12: ; preds = %4
%13 = tail call i32 @putchar(i32 %5)
br label %14
14: ; preds = %12, %4
%15 = tail call i32 (...) @getchar()
%16 = load i32, i32* @EOF
%17 = icmp eq i32 %15, %16
br i1 %17, label %18, label %4
18: ; preds = %14, %0
ret i32 0
}