#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 character, lastWasSpace;
  lastWasSpace = 1;
  while ((character = getchar()) != EOF) {
    if (character != ' ' || !lastWasSpace) {
      putchar(character);
    }
    lastWasSpace = (character == ' ') ? 1 : 0;
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x1,-0xc(%rbp)
mov    $0x0,%al
call   1040 <getchar@plt>
mov    %eax,-0x8(%rbp)
mov    0x2ea1(%rip),%rcx
cmp    (%rcx),%eax
je     1183 <main+0x63>
cmpl   $0x20,-0x8(%rbp)
jne    1163 <main+0x43>
cmpl   $0x0,-0xc(%rbp)
jne    116b <main+0x4b>
mov    -0x8(%rbp),%edi
call   1030 <putchar@plt>
mov    -0x8(%rbp),%edx
xor    %eax,%eax
mov    $0x1,%ecx
cmp    $0x20,%edx
cmove  %ecx,%eax
mov    %eax,-0xc(%rbp)
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
mov    %eax,%ebx
mov    $0x1,%ebp
jmp    116e <main+0x4e>
nopw   0x0(%rax,%rax,1)
mov    %ebx,%edi
call   1030 <putchar@plt>
xor    %ebp,%ebp
cmp    $0x20,%ebx
sete   %bpl
xor    %eax,%eax
call   1040 <getchar@plt>
mov    %eax,%ebx
cmp    (%r14),%eax
je     1137 <main+0x17>
test   %ebp,%ebp
je     1150 <main+0x30>
cmp    $0x20,%ebx
je     1157 <main+0x37>
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
store i32 1, i32* %3
br label %4
4: ; preds = %17, %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 %22
8: ; preds = %4
%9 = load i32, i32* %2
%10 = icmp ne i32 %9, 32
br i1 %10, label %14, label %11
11: ; preds = %8
%12 = load i32, i32* %3
%13 = icmp ne i32 %12, 0
br i1 %13, label %17, label %14
14: ; preds = %11, %8
%15 = load i32, i32* %2
%16 = call i32 @putchar(i32 %15)
br label %17
17: ; preds = %14, %11
%18 = load i32, i32* %2
%19 = icmp eq i32 %18, 32
%20 = zext i1 %19 to i64
%21 = select i1 %19, i32 1, i32 0
store i32 %21, i32* %3
br label %4
22: ; preds = %4
%23 = load i32, i32* %1
ret i32 %23
}

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