#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 space_num = 0;
  int ch;
  while ((ch = getchar()) != EOF) {
    if (ch == ' ') {
      if (++space_num == 1) {
        putchar(ch);
      }
    } else {
      space_num = 0;
      putchar(ch);
    }
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x8(%rbp)
mov    $0x0,%al
call   1040 <getchar@plt>
mov    %eax,-0xc(%rbp)
mov    0x2ea1(%rip),%rcx
cmp    (%rcx),%eax
je     118c <main+0x6c>
cmpl   $0x20,-0xc(%rbp)
jne    1178 <main+0x58>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
cmp    $0x1,%eax
jne    1173 <main+0x53>
mov    -0xc(%rbp),%edi
call   1030 <putchar@plt>
jmp    1187 <main+0x67>
movl   $0x0,-0x8(%rbp)
mov    -0xc(%rbp),%edi
call   1030 <putchar@plt>
jmp    1136 <main+0x16>
xor    %eax,%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    1161 <main+0x41>
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>
xor    %ebp,%ebp
cmp    $0x20,%eax
jne    114c <main+0x2c>
test   %ebx,%ebx
je     1142 <main+0x22>
add    $0x1,%ebx
jmp    1155 <main+0x35>

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

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