#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*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
int main() {
  int times = 0;
  printf("How many times ?");
  scanf("%d", &times);
  printf("Method 1\n");
  for (int i = 0; i < times; i++) {
    printf("I am the loop with number %d\n", i);
  }
  printf("Method 2\n");
  for (int i = 0; i < times; i++) {
    printf("I am the loop with number %d\n", i + 1);
  }
  printf("Method 3\n");
  for (int i = 1; i <= times; i++) {
    printf("I am the loop with number %d\n", i);
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x8(%rbp)
lea    0xec3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec6(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
lea    0xeb9(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0xc(%rbp)
mov    -0xc(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    1194 <main+0x74>
mov    -0xc(%rbp),%esi
lea    0xe9f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    1169 <main+0x49>
lea    0xea1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x10(%rbp)
mov    -0x10(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    11d7 <main+0xb7>
mov    -0x10(%rbp),%esi
add    $0x1,%esi
lea    0xe5c(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x10(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x10(%rbp)
jmp    11a9 <main+0x89>
lea    0xe68(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x1,-0x14(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0x8(%rbp),%eax
jg     1217 <main+0xf7>
mov    -0x14(%rbp),%esi
lea    0xe1c(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    11ec <main+0xcc>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
push   %rax
movl   $0x0,0x4(%rsp)
lea    0xebe(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xec1(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1050 <scanf@plt>
lea    0xed1(%rip),%rdi
call   1030 <puts@plt>
cmpl   $0x0,0x4(%rsp)
jle    1195 <main+0x65>
lea    0xea0(%rip),%rbx
xor    %ebp,%ebp
cs nopw 0x0(%rax,%rax,1)
mov    %rbx,%rdi
mov    %ebp,%esi
xor    %eax,%eax
call   1040 <printf@plt>
add    $0x1,%ebp
cmp    0x4(%rsp),%ebp
jl     1180 <main+0x50>
lea    0xe9f(%rip),%rdi
call   1030 <puts@plt>
cmpl   $0x0,0x4(%rsp)
jle    11d5 <main+0xa5>
lea    0xe65(%rip),%rbx
xor    %ebp,%ebp
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
add    $0x1,%ebp
mov    %rbx,%rdi
mov    %ebp,%esi
xor    %eax,%eax
call   1040 <printf@plt>
cmp    0x4(%rsp),%ebp
jl     11c0 <main+0x90>
lea    0xe68(%rip),%rdi
call   1030 <puts@plt>
cmpl   $0x0,0x4(%rsp)
jle    1215 <main+0xe5>
lea    0xe25(%rip),%rbx
xor    %ebp,%ebp
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
add    $0x1,%ebp
mov    %rbx,%rdi
mov    %ebp,%esi
xor    %eax,%eax
call   1040 <printf@plt>
cmp    0x4(%rsp),%ebp
jl     1200 <main+0xd0>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [17 x i8] c"How many times ?\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [10 x i8] c"Method 1\0A\00"
@.str.3 = [30 x i8] c"I am the loop with number %d\0A\00"
@.str.4 = [10 x i8] c"Method 2\0A\00"
@.str.5 = [10 x i8] c"Method 3\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %2
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.2, i64 0, i64 0))
store i32 0, i32* %3
br label %9
9: ; preds = %16, %0
%10 = load i32, i32* %3
%11 = load i32, i32* %2
%12 = icmp slt i32 %10, %11
br i1 %12, label %13, label %19
13: ; preds = %9
%14 = load i32, i32* %3
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.3, i64 0, i64 0), i32 %14)
br label %16
16: ; preds = %13
%17 = load i32, i32* %3
%18 = add nsw i32 %17, 1
store i32 %18, i32* %3
br label %9
19: ; preds = %9
%20 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.4, i64 0, i64 0))
store i32 0, i32* %4
br label %21
21: ; preds = %29, %19
%22 = load i32, i32* %4
%23 = load i32, i32* %2
%24 = icmp slt i32 %22, %23
br i1 %24, label %25, label %32
25: ; preds = %21
%26 = load i32, i32* %4
%27 = add nsw i32 %26, 1
%28 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.3, i64 0, i64 0), i32 %27)
br label %29
29: ; preds = %25
%30 = load i32, i32* %4
%31 = add nsw i32 %30, 1
store i32 %31, i32* %4
br label %21
32: ; preds = %21
%33 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.5, i64 0, i64 0))
store i32 1, i32* %5
br label %34
34: ; preds = %41, %32
%35 = load i32, i32* %5
%36 = load i32, i32* %2
%37 = icmp sle i32 %35, %36
br i1 %37, label %38, label %44
38: ; preds = %34
%39 = load i32, i32* %5
%40 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.3, i64 0, i64 0), i32 %39)
br label %41
41: ; preds = %38
%42 = load i32, i32* %5
%43 = add nsw i32 %42, 1
store i32 %43, i32* %5
br label %34
44: ; preds = %34
ret i32 0
}

LLVM IR (-O2):
@.str = [17 x i8] c"How many times ?\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.3 = [30 x i8] c"I am the loop with number %d\0A\00"
@str = [9 x i8] c"Method 1\00"
@str.6 = [9 x i8] c"Method 2\00"
@str.7 = [9 x i8] c"Method 3\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
store i32 0, i32* %1
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 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 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @str, i64 0, i64 0))
%6 = load i32, i32* %1
%7 = icmp sgt i32 %6, 0
br i1 %7, label %12, label %8
8: ; preds = %12, %0
%9 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @str.6, i64 0, i64 0))
%10 = load i32, i32* %1
%11 = icmp sgt i32 %10, 0
br i1 %11, label %22, label %18
12: ; preds = %0, %12
%13 = phi i32 [ %15, %12 ], [ 0, %0 ]
%14 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([30 x i8], [30 x i8]* @.str.3, i64 0, i64 0), i32 %13)
%15 = add nuw nsw i32 %13, 1
%16 = load i32, i32* %1
%17 = icmp slt i32 %15, %16
br i1 %17, label %12, label %8
18: ; preds = %22, %8
%19 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @str.7, i64 0, i64 0))
%20 = load i32, i32* %1
%21 = icmp slt i32 %20, 1
br i1 %21, label %28, label %29
22: ; preds = %8, %22
%23 = phi i32 [ %24, %22 ], [ 0, %8 ]
%24 = add nuw nsw i32 %23, 1
%25 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([30 x i8], [30 x i8]* @.str.3, i64 0, i64 0), i32 %24)
%26 = load i32, i32* %1
%27 = icmp slt i32 %24, %26
br i1 %27, label %22, label %18
28: ; preds = %29, %18
ret i32 0
29: ; preds = %18, %29
%30 = phi i32 [ %32, %29 ], [ 1, %18 ]
%31 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([30 x i8], [30 x i8]* @.str.3, i64 0, i64 0), i32 %30)
%32 = add nuw nsw i32 %30, 1
%33 = load i32, i32* %1
%34 = icmp slt i32 %30, %33
br i1 %34, label %29, label %28
}