#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 a[5], i, temp;
  printf("enter array a:\n");
  for (i = 0; i < 5; i++)
    scanf("%d", &a[i]);
  printf("array a:\n");
  for (i = 0; i < 5; i++)
    printf("%4d", a[i]);
  for (i = 0; i < 5 / 2; i++) {
    temp = a[i];
    a[i] = a[5 - i - 1];
    a[5 - i - 1] = temp;
  }
  printf("\nNow,array a:\n");
  for (i = 0; i < 5; i++)
    printf("%4d", a[i]);
  printf("\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x24(%rbp)
cmpl   $0x5,-0x24(%rbp)
jge    1177 <main+0x57>
movslq -0x24(%rbp),%rax
lea    -0x20(%rbp),%rsi
shl    $0x2,%rax
add    %rax,%rsi
lea    0xeac(%rip),%rdi
call   1040 <scanf@plt>
mov    -0x24(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x24(%rbp)
jmp    1144 <main+0x24>
lea    0xe88(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x24(%rbp)
cmpl   $0x5,-0x24(%rbp)
jge    11ba <main+0x9a>
movslq -0x24(%rbp),%rax
mov    -0x20(%rbp,%rax,4),%esi
lea    0xe6e(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x24(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x24(%rbp)
jmp    118c <main+0x6c>
movl   $0x0,-0x24(%rbp)
cmpl   $0x2,-0x24(%rbp)
jge    1211 <main+0xf1>
movslq -0x24(%rbp),%rax
mov    -0x20(%rbp,%rax,4),%eax
mov    %eax,-0x28(%rbp)
mov    $0x5,%eax
sub    -0x24(%rbp),%eax
sub    $0x1,%eax
cltq
mov    -0x20(%rbp,%rax,4),%ecx
movslq -0x24(%rbp),%rax
mov    %ecx,-0x20(%rbp,%rax,4)
mov    -0x28(%rbp),%ecx
mov    $0x5,%eax
sub    -0x24(%rbp),%eax
sub    $0x1,%eax
cltq
mov    %ecx,-0x20(%rbp,%rax,4)
mov    -0x24(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x24(%rbp)
jmp    11c1 <main+0xa1>
lea    0xdff(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x24(%rbp)
cmpl   $0x5,-0x24(%rbp)
jge    1254 <main+0x134>
movslq -0x24(%rbp),%rax
mov    -0x20(%rbp,%rax,4),%esi
lea    0xdd4(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x24(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x24(%rbp)
jmp    1226 <main+0x106>
lea    0xdb3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x20,%rsp
lea    0xebb(%rip),%rdi
call   1040 <puts@plt>
lea    0xea8(%rip),%rbx
mov    %rsp,%rsi
mov    %rbx,%rdi
call   1060 <scanf@plt>
lea    0x4(%rsp),%rsi
mov    %rbx,%rdi
call   1060 <scanf@plt>
lea    0x8(%rsp),%rsi
mov    %rbx,%rdi
call   1060 <scanf@plt>
lea    0xc(%rsp),%rsi
mov    %rbx,%rdi
call   1060 <scanf@plt>
lea    0x10(%rsp),%rsi
mov    %rbx,%rdi
call   1060 <scanf@plt>
lea    0xe6f(%rip),%rdi
call   1040 <puts@plt>
mov    (%rsp),%esi
lea    0xe56(%rip),%rbx
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x4(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x8(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0xc(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x10(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    (%rsp),%rax
mov    0xc(%rsp),%rcx
rol    $0x20,%rax
rol    $0x20,%rcx
mov    %rcx,(%rsp)
mov    %rax,0xc(%rsp)
lea    0xe06(%rip),%rdi
call   1040 <puts@plt>
mov    (%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x4(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x8(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0xc(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x10(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [16 x i8] c"enter array a:\0A\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [10 x i8] c"array a:\0A\00"
@.str.3 = [4 x i8] c"%4d\00"
@.str.4 = [15 x i8] c"\0ANow,array a:\0A\00"
@.str.5 = [2 x i8] c"\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [5 x i32]
%3 = alloca i32
%4 = alloca i32
store i32 0, i32* %1
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str, i64 0, i64 0))
store i32 0, i32* %3
br label %6
6: ; preds = %14, %0
%7 = load i32, i32* %3
%8 = icmp slt i32 %7, 5
br i1 %8, label %9, label %17
9: ; preds = %6
%10 = load i32, i32* %3
%11 = sext i32 %10 to i64
%12 = getelementptr inbounds [5 x i32], [5 x i32]* %2, i64 0, i64 %11
%13 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %12)
br label %14
14: ; preds = %9
%15 = load i32, i32* %3
%16 = add nsw i32 %15, 1
store i32 %16, i32* %3
br label %6
17: ; preds = %6
%18 = 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 %19
19: ; preds = %28, %17
%20 = load i32, i32* %3
%21 = icmp slt i32 %20, 5
br i1 %21, label %22, label %31
22: ; preds = %19
%23 = load i32, i32* %3
%24 = sext i32 %23 to i64
%25 = getelementptr inbounds [5 x i32], [5 x i32]* %2, i64 0, i64 %24
%26 = load i32, i32* %25
%27 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 %26)
br label %28
28: ; preds = %22
%29 = load i32, i32* %3
%30 = add nsw i32 %29, 1
store i32 %30, i32* %3
br label %19
31: ; preds = %19
store i32 0, i32* %3
br label %32
32: ; preds = %55, %31
%33 = load i32, i32* %3
%34 = icmp slt i32 %33, 2
br i1 %34, label %35, label %58
35: ; preds = %32
%36 = load i32, i32* %3
%37 = sext i32 %36 to i64
%38 = getelementptr inbounds [5 x i32], [5 x i32]* %2, i64 0, i64 %37
%39 = load i32, i32* %38
store i32 %39, i32* %4
%40 = load i32, i32* %3
%41 = sub nsw i32 5, %40
%42 = sub nsw i32 %41, 1
%43 = sext i32 %42 to i64
%44 = getelementptr inbounds [5 x i32], [5 x i32]* %2, i64 0, i64 %43
%45 = load i32, i32* %44
%46 = load i32, i32* %3
%47 = sext i32 %46 to i64
%48 = getelementptr inbounds [5 x i32], [5 x i32]* %2, i64 0, i64 %47
store i32 %45, i32* %48
%49 = load i32, i32* %4
%50 = load i32, i32* %3
%51 = sub nsw i32 5, %50
%52 = sub nsw i32 %51, 1
%53 = sext i32 %52 to i64
%54 = getelementptr inbounds [5 x i32], [5 x i32]* %2, i64 0, i64 %53
store i32 %49, i32* %54
br label %55
55: ; preds = %35
%56 = load i32, i32* %3
%57 = add nsw i32 %56, 1
store i32 %57, i32* %3
br label %32
58: ; preds = %32
%59 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.4, i64 0, i64 0))
store i32 0, i32* %3
br label %60
60: ; preds = %69, %58
%61 = load i32, i32* %3
%62 = icmp slt i32 %61, 5
br i1 %62, label %63, label %72
63: ; preds = %60
%64 = load i32, i32* %3
%65 = sext i32 %64 to i64
%66 = getelementptr inbounds [5 x i32], [5 x i32]* %2, i64 0, i64 %65
%67 = load i32, i32* %66
%68 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 %67)
br label %69
69: ; preds = %63
%70 = load i32, i32* %3
%71 = add nsw i32 %70, 1
store i32 %71, i32* %3
br label %60
72: ; preds = %60
%73 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.5, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [3 x i8] c"%d\00"
@.str.3 = [4 x i8] c"%4d\00"
@str = [15 x i8] c"enter array a:\00"
@str.6 = [9 x i8] c"array a:\00"
@str.7 = [14 x i8] c"\0ANow,array a:\00"
define i32 @main() {
%1 = alloca [5 x i32]
%2 = bitcast [5 x i32]* %1 to i8*
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @str, i64 0, i64 0))
%4 = getelementptr inbounds [5 x i32], [5 x i32]* %1, i64 0, i64 0
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %4)
%6 = getelementptr inbounds [5 x i32], [5 x i32]* %1, i64 0, i64 1
%7 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %6)
%8 = getelementptr inbounds [5 x i32], [5 x i32]* %1, i64 0, i64 2
%9 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %8)
%10 = getelementptr inbounds [5 x i32], [5 x i32]* %1, i64 0, i64 3
%11 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %10)
%12 = getelementptr inbounds [5 x i32], [5 x i32]* %1, i64 0, i64 4
%13 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %12)
%14 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @str.6, i64 0, i64 0))
%15 = load i32, i32* %4
%16 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 %15)
%17 = load i32, i32* %6
%18 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 %17)
%19 = load i32, i32* %8
%20 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 %19)
%21 = load i32, i32* %10
%22 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 %21)
%23 = load i32, i32* %12
%24 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 %23)
%25 = load i32, i32* %4
%26 = load i32, i32* %12
store i32 %26, i32* %4
store i32 %25, i32* %12
%27 = load i32, i32* %6
%28 = load i32, i32* %10
store i32 %28, i32* %6
store i32 %27, i32* %10
%29 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @str.7, i64 0, i64 0))
%30 = load i32, i32* %4
%31 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 %30)
%32 = load i32, i32* %6
%33 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 %32)
%34 = load i32, i32* %8
%35 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 %34)
%36 = load i32, i32* %10
%37 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 %36)
%38 = load i32, i32* %12
%39 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 %38)
%40 = call i32 @putchar(i32 10)
ret i32 0
}