#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 get_ones_count(int);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
int main() {
  int number;
  int ret;
  printf("Please input number:");
  scanf("%d", &number);
  if (number < 1) {
    return 0;
  }
  ret = get_ones_count(number);
  printf("get one:%d has %d ones!\n", number, ret);
  return ret;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xec1(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1050 <scanf@plt>
cmpl   $0x1,-0x8(%rbp)
jge    1173 <main+0x43>
movl   $0x0,-0x4(%rbp)
jmp    1198 <main+0x68>
mov    -0x8(%rbp),%edi
call   1030 <get_ones_count@plt>
mov    %eax,-0xc(%rbp)
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
lea    0xe8d(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0xc(%rbp),%eax
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xec4(%rip),%rdi
xor    %ebx,%ebx
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xec9(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1050 <scanf@plt>
mov    0xc(%rsp),%edi
test   %edi,%edi
jle    1179 <main+0x49>
call   1030 <get_ones_count@plt>
mov    %eax,%ebx
mov    0xc(%rsp),%esi
lea    0xea8(%rip),%rdi
mov    %eax,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %ebx,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [21 x i8] c"Please input number:\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [25 x i8] c"get one:%d has %d ones!\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0))
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%6 = load i32, i32* %2
%7 = icmp slt i32 %6, 1
br i1 %7, label %8, label %9
8: ; preds = %0
store i32 0, i32* %1
br label %16
9: ; preds = %0
%10 = load i32, i32* %2
%11 = call i32 @get_ones_count(i32 %10)
store i32 %11, i32* %3
%12 = load i32, i32* %2
%13 = load i32, i32* %3
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.2, i64 0, i64 0), i32 %12, i32 %13)
%15 = load i32, i32* %3
store i32 %15, i32* %1
br label %16
16: ; preds = %9, %8
%17 = load i32, i32* %1
ret i32 %17
}

LLVM IR (-O2):
@.str = [21 x i8] c"Please input number:\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [25 x i8] c"get one:%d has %d ones!\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%5 = load i32, i32* %1
%6 = icmp slt i32 %5, 1
br i1 %6, label %11, label %7
7: ; preds = %0
%8 = call i32 @get_ones_count(i32 %5)
%9 = load i32, i32* %1
%10 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @.str.2, i64 0, i64 0), i32 %9, i32 %8)
br label %11
11: ; preds = %0, %7
%12 = phi i32 [ %8, %7 ], [ 0, %0 ]
ret i32 %12
}