#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 /*<<< orphan*/ putchar(int);
main() {
  int c, lastc;
  lastc = 'a';
  while ((c = getchar()) != EOF) {
    if (c == ' ' || c == '\t')
      if (lastc == ' ' || lastc == '\t')
        ;
      else
        printf("\n");
    else
      putchar(c);
    lastc = c;
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x61,-0xc(%rbp)
mov    $0x0,%al
call   1050 <getchar@plt>
mov    %eax,-0x8(%rbp)
mov    0x2e91(%rip),%rcx
cmp    (%rcx),%eax
je     11b0 <main+0x80>
cmpl   $0x20,-0x8(%rbp)
je     1173 <main+0x43>
cmpl   $0x9,-0x8(%rbp)
jne    119d <main+0x6d>
cmpl   $0x20,-0xc(%rbp)
je     1187 <main+0x57>
cmpl   $0x9,-0xc(%rbp)
jne    118c <main+0x5c>
jmp    1198 <main+0x68>
lea    0xe6d(%rip),%rdi
call   1040 <printf@plt>
jmp    11a5 <main+0x75>
mov    -0x8(%rbp),%edi
call   1030 <putchar@plt>
mov    -0x8(%rbp),%eax
mov    %eax,-0xc(%rbp)
jmp    1146 <main+0x16>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
push   %rax
xor    %eax,%eax
call   1040 <getchar@plt>
mov    0x2eb6(%rip),%r14
cmp    (%r14),%eax
jne    1141 <main+0x21>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret
mov    $0x61,%ebx
jmp    1163 <main+0x43>
nopl   0x0(%rax,%rax,1)
mov    %ebx,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
call   1040 <getchar@plt>
cmp    (%r14),%eax
je     1137 <main+0x17>
mov    %ebx,%ecx
mov    %eax,%ebx
cmp    $0x20,%eax
je     1171 <main+0x51>
cmp    $0x9,%ebx
jne    1150 <main+0x30>
cmp    $0x9,%ecx
je     1157 <main+0x37>
cmp    $0x20,%ecx
je     1157 <main+0x37>
mov    $0xa,%edi
jmp    1152 <main+0x32>

LLVM IR (-O0):
@EOF = global i32 0
@.str = [2 x i8] c"\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
store i32 97, i32* %3
br label %4
4: ; preds = %27, %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 %29
8: ; preds = %4
%9 = load i32, i32* %2
%10 = icmp eq i32 %9, 32
br i1 %10, label %14, label %11
11: ; preds = %8
%12 = load i32, i32* %2
%13 = icmp eq i32 %12, 9
br i1 %13, label %14, label %24
14: ; preds = %11, %8
%15 = load i32, i32* %3
%16 = icmp eq i32 %15, 32
br i1 %16, label %20, label %17
17: ; preds = %14
%18 = load i32, i32* %3
%19 = icmp eq i32 %18, 9
br i1 %19, label %20, label %21
20: ; preds = %17, %14
br label %23
21: ; preds = %17
%22 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
br label %23
23: ; preds = %21, %20
br label %27
24: ; preds = %11
%25 = load i32, i32* %2
%26 = call i32 @putchar(i32 %25)
br label %27
27: ; preds = %24, %23
%28 = load i32, i32* %2
store i32 %28, i32* %3
br label %4
29: ; preds = %4
%30 = load i32, i32* %1
ret i32 %30
}

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 %16, label %4
4: ; preds = %0, %12
%5 = phi i32 [ %13, %12 ], [ %1, %0 ]
%6 = phi i32 [ %5, %12 ], [ 97, %0 ]
switch i32 %5, label %10 [
i32 32, label %7
i32 9, label %7
]
7: ; preds = %4, %4
switch i32 %6, label %8 [
i32 32, label %12
i32 9, label %12
]
8: ; preds = %7
%9 = tail call i32 @putchar(i32 10)
br label %12
10: ; preds = %4
%11 = tail call i32 @putchar(i32 %5)
br label %12
12: ; preds = %7, %7, %8, %10
%13 = tail call i32 (...) @getchar()
%14 = load i32, i32* @EOF
%15 = icmp eq i32 %13, %14
br i1 %15, label %16, label %4
16: ; preds = %12, %0
ret i32 0
}