#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);
int main() {
  int c;
  bool seenblank = false;
  while ((c = getchar()) != EOF) {
    if (c == ' ' && !seenblank) {
      seenblank = true;
      putchar(c);
    } else if (c != ' ') {
      seenblank = false;
    }
    if (!seenblank)
      putchar(c);
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0xc(%rbp)
mov    $0x0,%al
call   1040 <getchar@plt>
mov    %eax,-0x8(%rbp)
mov    0x2ea1(%rip),%rcx
cmp    (%rcx),%eax
je     11a4 <main+0x84>
cmpl   $0x20,-0x8(%rbp)
jne    1177 <main+0x57>
cmpl   $0x0,-0xc(%rbp)
jne    1177 <main+0x57>
movl   $0x1,-0xc(%rbp)
mov    -0x8(%rbp),%edi
call   1030 <putchar@plt>
jmp    118d <main+0x6d>
cmpl   $0x20,-0x8(%rbp)
je     1188 <main+0x68>
movl   $0x0,-0xc(%rbp)
jmp    118d <main+0x6d>
cmpl   $0x0,-0xc(%rbp)
jne    119f <main+0x7f>
mov    -0x8(%rbp),%edi
call   1030 <putchar@plt>
jmp    1136 <main+0x16>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r14
push   %rbx
xor    %eax,%eax
call   1040 <getchar@plt>
mov    0x2eb6(%rip),%r14
cmp    (%r14),%eax
jne    113e <main+0x1e>
xor    %eax,%eax
pop    %rbx
pop    %r14
pop    %rbp
ret
xor    %ebx,%ebx
jmp    116f <main+0x4f>
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
mov    $0x1,%ebp
mov    $0x20,%eax
mov    %eax,%edi
call   1030 <putchar@plt>
mov    %ebp,%ebx
xor    %eax,%eax
call   1040 <getchar@plt>
cmp    (%r14),%eax
je     1137 <main+0x17>
cmp    $0x20,%eax
jne    1178 <main+0x58>
test   %ebx,%ebx
je     1150 <main+0x30>
xor    %ebp,%ebp
cmp    $0x20,%eax
jne    115a <main+0x3a>
test   %ebx,%ebx
jne    1163 <main+0x43>
jmp    115a <main+0x3a>

LLVM IR (-O0):
@EOF = global i32 0
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %3
br label %4
4: ; preds = %28, %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 %29
8: ; preds = %4
%9 = load i32, i32* %2
%10 = icmp eq i32 %9, 32
br i1 %10, label %11, label %17
11: ; preds = %8
%12 = load i32, i32* %3
%13 = icmp ne i32 %12, 0
br i1 %13, label %17, label %14
14: ; preds = %11
store i32 1, i32* %3
%15 = load i32, i32* %2
%16 = call i32 @putchar(i32 %15)
br label %22
17: ; preds = %11, %8
%18 = load i32, i32* %2
%19 = icmp ne i32 %18, 32
br i1 %19, label %20, label %21
20: ; preds = %17
store i32 0, i32* %3
br label %21
21: ; preds = %20, %17
br label %22
22: ; preds = %21, %14
%23 = load i32, i32* %3
%24 = icmp ne i32 %23, 0
br i1 %24, label %28, label %25
25: ; preds = %22
%26 = load i32, i32* %2
%27 = call i32 @putchar(i32 %26)
br label %28
28: ; preds = %25, %22
br label %4
29: ; preds = %4
%30 = load i32, i32* %1
ret i32 %30
}

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 %22, label %4
4: ; preds = %0, %17
%5 = phi i32 [ %19, %17 ], [ %1, %0 ]
%6 = phi i32 [ %18, %17 ], [ 0, %0 ]
%7 = icmp ne i32 %5, 32
%8 = icmp ne i32 %6, 0
%9 = select i1 %7, i1 true, i1 %8
br i1 %9, label %10, label %13
10: ; preds = %4
%11 = icmp eq i32 %6, 0
%12 = select i1 %7, i1 true, i1 %11
br i1 %12, label %13, label %17
13: ; preds = %10, %4
%14 = phi i32 [ 32, %4 ], [ %5, %10 ]
%15 = phi i32 [ 1, %4 ], [ 0, %10 ]
%16 = tail call i32 @putchar(i32 %14)
br label %17
17: ; preds = %13, %10
%18 = phi i32 [ %6, %10 ], [ %15, %13 ]
%19 = tail call i32 (...) @getchar()
%20 = load i32, i32* @EOF
%21 = icmp eq i32 %19, %20
br i1 %21, label %22, label %4
22: ; preds = %17, %0
ret i32 0
}