#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 *malloc(int);
int rand();
int /*<<< orphan*/ srand(unsigned int);
scalar_t__ time(int /*<<< orphan*/ *);
int *create_vec_rand(int n) {
  int *v, i;
  v = malloc(n * sizeof(int));
  srand((unsigned)time(NULL));
  for (i = 0; i < n; i++) {
    v[i] = rand() % n;
  }
  return v;
}


x86 assembly (clang, -O0):
<create_vec_rand>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %edi,-0x4(%rbp)
movslq -0x4(%rbp),%rax
shl    $0x2,%rax
mov    %eax,%edi
call   1050 <malloc@plt>
mov    %rax,-0x10(%rbp)
xor    %eax,%eax
mov    %eax,%edi
call   1040 <time@plt>
mov    %eax,%edi
call   1030 <srand@plt>
movl   $0x0,-0x14(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0x4(%rbp),%eax
jge    11a5 <create_vec_rand+0x65>
mov    $0x0,%al
call   1060 <rand@plt>
cltd
idivl  -0x4(%rbp)
mov    -0x10(%rbp),%rax
movslq -0x14(%rbp),%rcx
mov    %edx,(%rax,%rcx,4)
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1175 <create_vec_rand+0x35>
mov    -0x10(%rbp),%rax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<create_vec_rand>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
mov    %edi,%r14d
lea    0x0(,%r14,4),%edi
call   1050 <malloc@plt>
mov    %rax,%r15
xor    %edi,%edi
call   1040 <time@plt>
mov    %eax,%edi
call   1030 <srand@plt>
test   %r14d,%r14d
jle    1198 <create_vec_rand+0x58>
mov    %r14d,%r12d
xor    %ebx,%ebx
cs nopw 0x0(%rax,%rax,1)
nopl   (%rax)
xor    %eax,%eax
call   1060 <rand@plt>
cltd
idiv   %r14d
mov    %edx,(%r15,%rbx,4)
add    $0x1,%rbx
cmp    %rbx,%r12
jne    1180 <create_vec_rand+0x40>
mov    %r15,%rax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
define i32* @create_vec_rand(i32 %0) {
%2 = alloca i32
%3 = alloca i32*
%4 = alloca i32
store i32 %0, i32* %2
%5 = load i32, i32* %2
%6 = sext i32 %5 to i64
%7 = mul i64 %6, 4
%8 = trunc i64 %7 to i32
%9 = call i32* @malloc(i32 %8)
store i32* %9, i32** %3
%10 = call i64 @time(i32* null)
%11 = trunc i64 %10 to i32
%12 = call i32 @srand(i32 %11)
store i32 0, i32* %4
br label %13
13: ; preds = %25, %1
%14 = load i32, i32* %4
%15 = load i32, i32* %2
%16 = icmp slt i32 %14, %15
br i1 %16, label %17, label %28
17: ; preds = %13
%18 = call i32 (...) @rand()
%19 = load i32, i32* %2
%20 = srem i32 %18, %19
%21 = load i32*, i32** %3
%22 = load i32, i32* %4
%23 = sext i32 %22 to i64
%24 = getelementptr inbounds i32, i32* %21, i64 %23
store i32 %20, i32* %24
br label %25
25: ; preds = %17
%26 = load i32, i32* %4
%27 = add nsw i32 %26, 1
store i32 %27, i32* %4
br label %13
28: ; preds = %13
%29 = load i32*, i32** %3
ret i32* %29
}

LLVM IR (-O2):
define noalias i32* @create_vec_rand(i32 %0) {
%2 = shl i32 %0, 2
%3 = tail call i32* @malloc(i32 %2)
%4 = tail call i64 @time(i32* null)
%5 = trunc i64 %4 to i32
%6 = tail call i32 @srand(i32 %5)
%7 = icmp sgt i32 %0, 0
br i1 %7, label %8, label %17
8: ; preds = %1
%9 = zext i32 %0 to i64
br label %10
10: ; preds = %8, %10
%11 = phi i64 [ 0, %8 ], [ %15, %10 ]
%12 = tail call i32 (...) @rand()
%13 = srem i32 %12, %0
%14 = getelementptr inbounds i32, i32* %3, i64 %11
store i32 %13, i32* %14
%15 = add nuw nsw i64 %11, 1
%16 = icmp eq i64 %15, %9
br i1 %16, label %17, label %10
17: ; preds = %10, %1
ret i32* %3
}