#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*/ exit(int /*<<< orphan*/);
int /*<<< orphan*/ free(int *);
scalar_t__ malloc(int);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
int main() {
  int n, i, *ptr, sum = 0;
  printf("Enter number of elements: ");
  scanf("%d", &n);
  ptr = (int *)malloc(n * sizeof(int));
  if (ptr == NULL) {
    printf("Error! memory not allocated.");
    exit(0);
  }
  printf("Enter elements of array: ");
  for (i = 0; i < n; ++i) {
    scanf("%d", ptr + i);
    sum += *(ptr + i);
  }
  printf("Sum=%d", sum);
  free(ptr);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x1c(%rbp)
lea    0xe93(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xedb(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1060 <scanf@plt>
movslq -0x8(%rbp),%rax
shl    $0x2,%rax
mov    %eax,%edi
call   1050 <malloc@plt>
mov    %rax,-0x18(%rbp)
cmpq   $0x0,-0x18(%rbp)
jne    11b7 <main+0x67>
lea    0xe72(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
xor    %edi,%edi
call   1070 <exit@plt>
lea    0xe7a(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
movl   $0x0,-0xc(%rbp)
mov    -0xc(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    1212 <main+0xc2>
mov    -0x18(%rbp),%rsi
movslq -0xc(%rbp),%rax
shl    $0x2,%rax
add    %rax,%rsi
lea    0xe68(%rip),%rdi
call   1060 <scanf@plt>
mov    -0x18(%rbp),%rax
movslq -0xc(%rbp),%rcx
mov    (%rax,%rcx,4),%eax
add    -0x1c(%rbp),%eax
mov    %eax,-0x1c(%rbp)
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    11cc <main+0x7c>
mov    -0x1c(%rbp),%esi
lea    0xe36(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x18(%rbp),%rdi
call   1030 <free@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %r12
push   %rbx
sub    $0x10,%rsp
lea    0xe9d(%rip),%rdi
xor    %r12d,%r12d
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xee2(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1060 <scanf@plt>
mov    0xc(%rsp),%edi
shl    $0x2,%edi
call   1050 <malloc@plt>
test   %rax,%rax
je     1208 <main+0xb8>
mov    %rax,%r14
lea    0xe9f(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
cmpl   $0x0,0xc(%rsp)
jle    11e0 <main+0x90>
xor    %ebp,%ebp
lea    0xea6(%rip),%r15
mov    %r14,%rbx
xor    %r12d,%r12d
cs nopw 0x0(%rax,%rax,1)
mov    %r15,%rdi
mov    %rbx,%rsi
call   1060 <scanf@plt>
add    (%rbx),%r12d
add    $0x1,%rbp
movslq 0xc(%rsp),%rax
add    $0x4,%rbx
cmp    %rax,%rbp
jl     11c0 <main+0x70>
lea    0xe6b(%rip),%rdi
mov    %r12d,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %r14,%rdi
call   1030 <free@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
pop    %rbp
ret
lea    0xe0c(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %edi,%edi
call   1070 <exit@plt>

LLVM IR (-O0):
@.str = [27 x i8] c"Enter number of elements: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [29 x i8] c"Error! memory not allocated.\00"
@.str.3 = [26 x i8] c"Enter elements of array: \00"
@.str.4 = [7 x i8] c"Sum=%d\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* %5
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([27 x i8], [27 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 = load i32, i32* %2
%9 = sext i32 %8 to i64
%10 = mul i64 %9, 4
%11 = trunc i64 %10 to i32
%12 = call i64 @malloc(i32 %11)
%13 = inttoptr i64 %12 to i32*
store i32* %13, i32** %4
%14 = load i32*, i32** %4
%15 = icmp eq i32* %14, null
br i1 %15, label %16, label %19
16: ; preds = %0
%17 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.2, i64 0, i64 0))
%18 = call i32 @exit(i32 0)
unreachable
19: ; preds = %0
%20 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.3, i64 0, i64 0))
store i32 0, i32* %3
br label %21
21: ; preds = %38, %19
%22 = load i32, i32* %3
%23 = load i32, i32* %2
%24 = icmp slt i32 %22, %23
br i1 %24, label %25, label %41
25: ; preds = %21
%26 = load i32*, i32** %4
%27 = load i32, i32* %3
%28 = sext i32 %27 to i64
%29 = getelementptr inbounds i32, i32* %26, i64 %28
%30 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %29)
%31 = load i32*, i32** %4
%32 = load i32, i32* %3
%33 = sext i32 %32 to i64
%34 = getelementptr inbounds i32, i32* %31, i64 %33
%35 = load i32, i32* %34
%36 = load i32, i32* %5
%37 = add nsw i32 %36, %35
store i32 %37, i32* %5
br label %38
38: ; preds = %25
%39 = load i32, i32* %3
%40 = add nsw i32 %39, 1
store i32 %40, i32* %3
br label %21
41: ; preds = %21
%42 = load i32, i32* %5
%43 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.4, i64 0, i64 0), i32 %42)
%44 = load i32*, i32** %4
%45 = call i32 @free(i32* %44)
ret i32 0
}

LLVM IR (-O2):
@.str = [27 x i8] c"Enter number of elements: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [29 x i8] c"Error! memory not allocated.\00"
@.str.3 = [26 x i8] c"Enter elements of array: \00"
@.str.4 = [7 x i8] c"Sum=%d\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([27 x i8], [27 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 = shl i32 %5, 2
%7 = call i64 @malloc(i32 %6)
%8 = inttoptr i64 %7 to i32*
%9 = icmp eq i64 %7, 0
br i1 %9, label %10, label %13
10: ; preds = %0
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([29 x i8], [29 x i8]* @.str.2, i64 0, i64 0))
%12 = call i32 @exit(i32 0)
unreachable
13: ; preds = %0
%14 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @.str.3, i64 0, i64 0))
%15 = load i32, i32* %1
%16 = icmp sgt i32 %15, 0
br i1 %16, label %17, label %28
17: ; preds = %13, %17
%18 = phi i64 [ %24, %17 ], [ 0, %13 ]
%19 = phi i32 [ %23, %17 ], [ 0, %13 ]
%20 = getelementptr inbounds i32, i32* %8, i64 %18
%21 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %20)
%22 = load i32, i32* %20
%23 = add nsw i32 %22, %19
%24 = add nuw nsw i64 %18, 1
%25 = load i32, i32* %1
%26 = sext i32 %25 to i64
%27 = icmp slt i64 %24, %26
br i1 %27, label %17, label %28
28: ; preds = %17, %13
%29 = phi i32 [ 0, %13 ], [ %23, %17 ]
%30 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([7 x i8], [7 x i8]* @.str.4, i64 0, i64 0), i32 %29)
%31 = call i32 @free(i32* %8)
ret i32 0
}