#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*/ printf(char *, ...);
int main() {
  int c = 0;
  int blanks = 0;
  while ((c = getchar()) != EOF) {
    if (c == ' ')
      blanks += 1;
    else {
      if (blanks > 0) {
        printf(" ");
        blanks = 0;
      }
      printf("%c", c);
    }
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x8(%rbp)
movl   $0x0,-0xc(%rbp)
mov    $0x0,%al
call   1040 <getchar@plt>
mov    %eax,-0x8(%rbp)
mov    0x2e9a(%rip),%rcx
cmp    (%rcx),%eax
je     11a3 <main+0x83>
cmpl   $0x20,-0x8(%rbp)
jne    116e <main+0x4e>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    119e <main+0x7e>
cmpl   $0x0,-0xc(%rbp)
jle    118d <main+0x6d>
lea    0xe81(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0xc(%rbp)
mov    -0x8(%rbp),%esi
lea    0xe6b(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    113d <main+0x1d>
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
xor    %ebp,%ebp
jmp    1161 <main+0x41>
cs nopw 0x0(%rax,%rax,1)
xchg   %ax,%ax
add    $0x1,%ebp
xor    %eax,%eax
call   1040 <getchar@plt>
mov    %eax,%ebx
cmp    (%r14),%eax
je     1137 <main+0x17>
cmp    $0x20,%ebx
je     1150 <main+0x30>
test   %ebp,%ebp
jle    1176 <main+0x56>
mov    $0x20,%edi
call   1030 <putchar@plt>
xor    %ebp,%ebp
mov    %ebx,%edi
call   1030 <putchar@plt>
jmp    1153 <main+0x33>

LLVM IR (-O0):
@EOF = global i32 0
@.str = [2 x i8] c" \00"
@.str.1 = [3 x i8] c"%c\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %2
store i32 0, i32* %3
br label %4
4: ; preds = %22, %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 %23
8: ; preds = %4
%9 = load i32, i32* %2
%10 = icmp eq i32 %9, 32
br i1 %10, label %11, label %14
11: ; preds = %8
%12 = load i32, i32* %3
%13 = add nsw i32 %12, 1
store i32 %13, i32* %3
br label %22
14: ; preds = %8
%15 = load i32, i32* %3
%16 = icmp sgt i32 %15, 0
br i1 %16, label %17, label %19
17: ; preds = %14
%18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i32 0, i32* %3
br label %19
19: ; preds = %17, %14
%20 = load i32, i32* %2
%21 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32 %20)
br label %22
22: ; preds = %19, %11
br label %4
23: ; preds = %4
%24 = load i32, i32* %1
ret i32 %24
}

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 %22, label %4
4: ; preds = %0, %17
%5 = phi i32 [ %19, %17 ], [ %1, %0 ]
%6 = phi i32 [ %18, %17 ], [ 0, %0 ]
%7 = icmp eq i32 %5, 32
br i1 %7, label %8, label %10
8: ; preds = %4
%9 = add nsw i32 %6, 1
br label %17
10: ; preds = %4
%11 = icmp sgt i32 %6, 0
br i1 %11, label %12, label %14
12: ; preds = %10
%13 = tail call i32 @putchar(i32 32)
br label %14
14: ; preds = %12, %10
%15 = phi i32 [ 0, %12 ], [ %6, %10 ]
%16 = tail call i32 @putchar(i32 %5)
br label %17
17: ; preds = %14, %8
%18 = phi i32 [ %9, %8 ], [ %15, %14 ]
%19 = tail call i32 (...) @getchar()
%20 = load i32, i32* @EOF
%21 = icmp eq i32 %19, %20
br i1 %21, label %22, label %4
22: ; preds = %17, %0
ret i32 0
}