#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 /*<<< orphan*/ fflush(int /*<<< orphan*/);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ stdout;
int /*<<< orphan*/ usleep(int);
int main(int argc, char **argv) {
  int i = 0;
  for (i = 0; i < 100; i++) {
    printf("%d%%\r", i);
    fflush(stdout);
    usleep(50 * 1000);
  }
  printf("%d%%\r", i);
  printf("\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
movl   $0x0,-0x14(%rbp)
movl   $0x0,-0x14(%rbp)
cmpl   $0x64,-0x14(%rbp)
jge    1195 <main+0x65>
mov    -0x14(%rbp),%esi
lea    0xe98(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    0x2e6a(%rip),%rax
mov    (%rax),%edi
call   1040 <fflush@plt>
mov    $0xc350,%edi
call   1050 <usleep@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1154 <main+0x24>
mov    -0x14(%rbp),%esi
lea    0xe61(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe59(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r14
push   %rbx
lea    0xeb5(%rip),%r14
mov    0x2e8e(%rip),%rbx
xor    %ebp,%ebp
cs nopw 0x0(%rax,%rax,1)
xchg   %ax,%ax
mov    %r14,%rdi
mov    %ebp,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    (%rbx),%edi
call   1050 <fflush@plt>
mov    $0xc350,%edi
call   1060 <usleep@plt>
add    $0x1,%ebp
cmp    $0x64,%ebp
jne    1160 <main+0x20>
lea    0xe74(%rip),%rdi
mov    $0x64,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
@.str = [6 x i8] c"%d%%\0D\00"
@stdout = global i32 0
@.str.1 = [2 x i8] c"\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
store i32 0, i32* %6
store i32 0, i32* %6
br label %7
7: ; preds = %16, %2
%8 = load i32, i32* %6
%9 = icmp slt i32 %8, 100
br i1 %9, label %10, label %19
10: ; preds = %7
%11 = load i32, i32* %6
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i32 %11)
%13 = load i32, i32* @stdout
%14 = call i32 @fflush(i32 %13)
%15 = call i32 @usleep(i32 50000)
br label %16
16: ; preds = %10
%17 = load i32, i32* %6
%18 = add nsw i32 %17, 1
store i32 %18, i32* %6
br label %7
19: ; preds = %7
%20 = load i32, i32* %6
%21 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i32 %20)
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str = [6 x i8] c"%d%%\0D\00"
@stdout = global i32 0
define i32 @main(i32 %0, i8** nocapture readnone %1) {
br label %3
3: ; preds = %2, %3
%4 = phi i32 [ 0, %2 ], [ %9, %3 ]
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i32 %4)
%6 = load i32, i32* @stdout
%7 = tail call i32 @fflush(i32 %6)
%8 = tail call i32 @usleep(i32 50000)
%9 = add nuw nsw i32 %4, 1
%10 = icmp eq i32 %9, 100
br i1 %10, label %11, label %3
11: ; preds = %3
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i32 100)
%13 = tail call i32 @putchar(i32 10)
ret i32 0
}