#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);
int main() {
  int c;
  int read_blank;
  read_blank = 0;
  while ((c = getchar()) != EOF) {
    if (c == ' ') {
      read_blank = 1;
    } else {
      if (read_blank) {
        putchar(' ');
        read_blank = 0;
      }
      putchar(c);
    }
  }
  if (read_blank) {
    putchar(' ');
  }
  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     1190 <main+0x70>
cmpl   $0x20,-0x8(%rbp)
jne    1165 <main+0x45>
movl   $0x1,-0xc(%rbp)
jmp    118b <main+0x6b>
cmpl   $0x0,-0xc(%rbp)
je     1180 <main+0x60>
mov    $0x20,%edi
call   1030 <putchar@plt>
movl   $0x0,-0xc(%rbp)
mov    -0x8(%rbp),%eax
movsbl %al,%edi
call   1030 <putchar@plt>
jmp    1136 <main+0x16>
cmpl   $0x0,-0xc(%rbp)
je     11a4 <main+0x84>
mov    $0x20,%edi
call   1030 <putchar@plt>
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
je     1184 <main+0x64>
xor    %ecx,%ecx
jmp    1159 <main+0x39>
nopl   0x0(%rax,%rax,1)
movsbl %bpl,%edi
call   1030 <putchar@plt>
xor    %ebx,%ebx
xor    %eax,%eax
call   1040 <getchar@plt>
mov    %ebx,%ecx
cmp    (%r14),%eax
je     1175 <main+0x55>
mov    %eax,%ebp
mov    $0x1,%ebx
cmp    $0x20,%eax
je     114b <main+0x2b>
test   %ecx,%ecx
je     1140 <main+0x20>
mov    $0x20,%edi
call   1030 <putchar@plt>
jmp    1140 <main+0x20>
cmp    $0x20,%ebp
jne    1184 <main+0x64>
mov    $0x20,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
pop    %rbx
pop    %r14
pop    %rbp
ret

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 = %21, %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 eq i32 %9, 32
br i1 %10, label %11, label %12
11: ; preds = %8
store i32 1, i32* %3
br label %21
12: ; preds = %8
%13 = load i32, i32* %3
%14 = icmp ne i32 %13, 0
br i1 %14, label %15, label %17
15: ; preds = %12
%16 = call i32 @putchar(i8 signext 32)
store i32 0, i32* %3
br label %17
17: ; preds = %15, %12
%18 = load i32, i32* %2
%19 = trunc i32 %18 to i8
%20 = call i32 @putchar(i8 signext %19)
br label %21
21: ; preds = %17, %11
br label %4
22: ; preds = %4
%23 = load i32, i32* %3
%24 = icmp ne i32 %23, 0
br i1 %24, label %25, label %27
25: ; preds = %22
%26 = call i32 @putchar(i8 signext 32)
br label %27
27: ; preds = %25, %22
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 %23, 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 %15, label %8
8: ; preds = %4
%9 = icmp eq i32 %6, 0
br i1 %9, label %12, label %10
10: ; preds = %8
%11 = tail call i32 @putchar(i8 signext 32)
br label %12
12: ; preds = %10, %8
%13 = trunc i32 %5 to i8
%14 = tail call i32 @putchar(i8 signext %13)
br label %15
15: ; preds = %4, %12
%16 = phi i32 [ 0, %12 ], [ 1, %4 ]
%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
br i1 %7, label %21, label %23
21: ; preds = %20
%22 = tail call i32 @putchar(i8 signext 32)
br label %23
23: ; preds = %0, %21, %20
ret i32 0
}