#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(char);
main() {
  int c, STATE = 0;
  while ((c = getchar()) != EOF) {
    if (c != ' ' && c != '\t') {
      putchar(c);
      STATE = 1;
    } else if (STATE == 1) {
      putchar(' ');
      STATE = 0;
    }
  }
}


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     119f <main+0x7f>
cmpl   $0x20,-0x8(%rbp)
je     117a <main+0x5a>
cmpl   $0x9,-0x8(%rbp)
je     117a <main+0x5a>
mov    -0x8(%rbp),%eax
movsbl %al,%edi
call   1030 <putchar@plt>
movl   $0x1,-0xc(%rbp)
jmp    119a <main+0x7a>
cmpl   $0x1,-0xc(%rbp)
jne    1195 <main+0x75>
mov    $0x20,%edi
call   1030 <putchar@plt>
movl   $0x0,-0xc(%rbp)
jmp    119a <main+0x7a>
jmp    1136 <main+0x16>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
push   %rax
xor    %eax,%eax
call   1040 <getchar@plt>
mov    0x2eb7(%rip),%rbx
cmp    (%rbx),%eax
jne    113e <main+0x1e>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret
xor    %ecx,%ecx
jmp    116a <main+0x4a>
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
mov    $0x1,%ebp
movsbl %al,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
call   1040 <getchar@plt>
mov    %ebp,%ecx
cmp    (%rbx),%eax
je     1135 <main+0x15>
cmp    $0x9,%eax
je     1174 <main+0x54>
cmp    $0x20,%eax
jne    1150 <main+0x30>
xor    %ebp,%ebp
mov    $0x20,%al
cmp    $0x1,%ecx
je     1155 <main+0x35>
jmp    115d <main+0x3d>

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 = %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 ne i32 %9, 32
br i1 %10, label %11, label %18
11: ; preds = %8
%12 = load i32, i32* %2
%13 = icmp ne i32 %12, 9
br i1 %13, label %14, label %18
14: ; preds = %11
%15 = load i32, i32* %2
%16 = trunc i32 %15 to i8
%17 = call i32 @putchar(i8 signext %16)
store i32 1, i32* %3
br label %24
18: ; preds = %11, %8
%19 = load i32, i32* %3
%20 = icmp eq i32 %19, 1
br i1 %20, label %21, label %23
21: ; preds = %18
%22 = call i32 @putchar(i8 signext 32)
store i32 0, i32* %3
br label %23
23: ; preds = %21, %18
br label %24
24: ; preds = %23, %14
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 %20, label %4
4: ; preds = %0, %15
%5 = phi i32 [ %17, %15 ], [ %1, %0 ]
%6 = phi i32 [ %16, %15 ], [ 0, %0 ]
switch i32 %5, label %7 [
i32 32, label %9
i32 9, label %9
]
7: ; preds = %4
%8 = trunc i32 %5 to i8
br label %11
9: ; preds = %4, %4
%10 = icmp eq i32 %6, 1
br i1 %10, label %11, label %15
11: ; preds = %9, %7
%12 = phi i8 [ %8, %7 ], [ 32, %9 ]
%13 = phi i32 [ 1, %7 ], [ 0, %9 ]
%14 = tail call i32 @putchar(i8 signext %12)
br label %15
15: ; preds = %11, %9
%16 = phi i32 [ 0, %9 ], [ %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
}