#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, last = -1;
  while ((c = getchar()) != EOF) {
    if (c == '\n' || c == '\t' || c == ' ') {
      c = ' ';
    }
    if (last != c) {
      putchar(c);
    }
    last = c;
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0xffffffff,-0xc(%rbp)
mov    $0x0,%al
call   1040 <getchar@plt>
mov    %eax,-0x8(%rbp)
mov    0x2ea1(%rip),%rcx
cmp    (%rcx),%eax
je     1193 <main+0x73>
cmpl   $0xa,-0x8(%rbp)
je     116d <main+0x4d>
cmpl   $0x9,-0x8(%rbp)
je     116d <main+0x4d>
cmpl   $0x20,-0x8(%rbp)
jne    1174 <main+0x54>
movl   $0x20,-0x8(%rbp)
mov    -0xc(%rbp),%eax
cmp    -0x8(%rbp),%eax
je     1188 <main+0x68>
mov    -0x8(%rbp),%edi
call   1030 <putchar@plt>
mov    -0x8(%rbp),%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    $0xffffffff,%ebx
mov    $0x20,%ebp
jmp    115c <main+0x3c>
nopw   0x0(%rax,%rax,1)
xor    %eax,%eax
call   1040 <getchar@plt>
cmp    (%r14),%eax
je     1137 <main+0x17>
mov    %ebx,%ecx
lea    -0x9(%rax),%edx
cmp    $0x2,%edx
mov    %eax,%ebx
cmovb  %ebp,%ebx
cmp    $0x20,%eax
cmove  %eax,%ebx
cmp    %ebx,%ecx
je     1150 <main+0x30>
mov    %ebx,%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
store i32 -1, i32* %3
br label %4
4: ; preds = %25, %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 %27
8: ; preds = %4
%9 = load i32, i32* %2
%10 = icmp eq i32 %9, 10
br i1 %10, label %17, label %11
11: ; preds = %8
%12 = load i32, i32* %2
%13 = icmp eq i32 %12, 9
br i1 %13, label %17, label %14
14: ; preds = %11
%15 = load i32, i32* %2
%16 = icmp eq i32 %15, 32
br i1 %16, label %17, label %18
17: ; preds = %14, %11, %8
store i32 32, i32* %2
br label %18
18: ; preds = %17, %14
%19 = load i32, i32* %3
%20 = load i32, i32* %2
%21 = icmp ne i32 %19, %20
br i1 %21, label %22, label %25
22: ; preds = %18
%23 = load i32, i32* %2
%24 = call i32 @putchar(i32 %23)
br label %25
25: ; preds = %22, %18
%26 = load i32, i32* %2
store i32 %26, i32* %3
br label %4
27: ; preds = %4
%28 = load i32, i32* %1
ret i32 %28
}

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 %19, label %4
4: ; preds = %0, %15
%5 = phi i32 [ %16, %15 ], [ %1, %0 ]
%6 = phi i32 [ %11, %15 ], [ -1, %0 ]
%7 = add i32 %5, -9
%8 = icmp ult i32 %7, 2
%9 = icmp eq i32 %5, 32
%10 = or i1 %9, %8
%11 = select i1 %10, i32 32, i32 %5
%12 = icmp eq i32 %6, %11
br i1 %12, label %15, label %13
13: ; preds = %4
%14 = tail call i32 @putchar(i32 %11)
br label %15
15: ; preds = %13, %4
%16 = tail call i32 (...) @getchar()
%17 = load i32, i32* @EOF
%18 = icmp eq i32 %16, %17
br i1 %18, label %19, label %4
19: ; preds = %15, %0
ret i32 0
}