#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;
  int has_blank = 0;
  while ((c = getchar()) != EOF) {
    if (c == '\t' || c == ' ') {
      if (has_blank == 0) {
        has_blank = 1;
        putchar(' ');
      }
    } else {
      has_blank = 0;
      putchar(c);
    }
  }
  return 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     1197 <main+0x77>
cmpl   $0x9,-0x8(%rbp)
je     1163 <main+0x43>
cmpl   $0x20,-0x8(%rbp)
jne    1183 <main+0x63>
cmpl   $0x0,-0xc(%rbp)
jne    117e <main+0x5e>
movl   $0x1,-0xc(%rbp)
mov    $0x20,%edi
call   1030 <putchar@plt>
jmp    1192 <main+0x72>
movl   $0x0,-0xc(%rbp)
mov    -0x8(%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   %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    1169 <main+0x49>
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
mov    $0x20,%eax
mov    %eax,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
call   1040 <getchar@plt>
mov    %ebp,%ecx
cmp    (%rbx),%eax
je     1135 <main+0x15>
cmp    $0x20,%eax
je     1175 <main+0x55>
xor    %ebp,%ebp
cmp    $0x9,%eax
jne    1155 <main+0x35>
mov    $0x1,%ebp
test   %ecx,%ecx
jne    115c <main+0x3c>
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 0, i32* %3
br label %4
4: ; preds = %23, %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 %24
8: ; preds = %4
%9 = load i32, i32* %2
%10 = icmp eq i32 %9, 9
br i1 %10, label %14, label %11
11: ; preds = %8
%12 = load i32, i32* %2
%13 = icmp eq i32 %12, 32
br i1 %13, label %14, label %20
14: ; preds = %11, %8
%15 = load i32, i32* %3
%16 = icmp eq i32 %15, 0
br i1 %16, label %17, label %19
17: ; preds = %14
store i32 1, i32* %3
%18 = call i32 @putchar(i32 32)
br label %19
19: ; preds = %17, %14
br label %23
20: ; preds = %11
store i32 0, i32* %3
%21 = load i32, i32* %2
%22 = call i32 @putchar(i32 %21)
br label %23
23: ; preds = %20, %19
br label %4
24: ; 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 %18, label %4
4: ; preds = %0, %13
%5 = phi i32 [ %15, %13 ], [ %1, %0 ]
%6 = phi i32 [ %14, %13 ], [ 0, %0 ]
switch i32 %5, label %9 [
i32 32, label %7
i32 9, label %7
]
7: ; preds = %4, %4
%8 = icmp eq i32 %6, 0
br i1 %8, label %9, label %13
9: ; preds = %4, %7
%10 = phi i32 [ 32, %7 ], [ %5, %4 ]
%11 = phi i32 [ 1, %7 ], [ 0, %4 ]
%12 = tail call i32 @putchar(i32 %10)
br label %13
13: ; preds = %9, %7
%14 = phi i32 [ 1, %7 ], [ %11, %9 ]
%15 = tail call i32 (...) @getchar()
%16 = load i32, i32* @EOF
%17 = icmp eq i32 %15, %16
br i1 %17, label %18, label %4
18: ; preds = %13, %0
ret i32 0
}