#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 */
scalar_t__ malloc(int);
int /*<<< orphan*/ memset(int *, int /*<<< orphan*/, int);
int **array2d(int dimension) {
  int **array = (int **)malloc(sizeof(int *) * dimension);
  for (int i = 0; i < dimension; i++) {
    array[i] = (int *)malloc(sizeof(int) * dimension);
    memset(array[i], 0, dimension * sizeof(int));
  }
  return array;
}


x86 assembly (clang, -O0):
<array2d>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %edi,-0x4(%rbp)
movslq -0x4(%rbp),%rax
shl    $0x3,%rax
mov    %eax,%edi
call   1040 <malloc@plt>
mov    %rax,-0x10(%rbp)
movl   $0x0,-0x14(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0x4(%rbp),%eax
jge    119a <array2d+0x7a>
movslq -0x4(%rbp),%rax
shl    $0x2,%rax
mov    %eax,%edi
call   1040 <malloc@plt>
mov    %rax,%rdx
mov    -0x10(%rbp),%rax
movslq -0x14(%rbp),%rcx
mov    %rdx,(%rax,%rcx,8)
mov    -0x10(%rbp),%rax
movslq -0x14(%rbp),%rcx
mov    (%rax,%rcx,8),%rdi
movslq -0x4(%rbp),%rax
shl    $0x2,%rax
mov    %eax,%edx
xor    %esi,%esi
call   1030 <memset@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1145 <array2d+0x25>
mov    -0x10(%rbp),%rax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<array2d>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
mov    %edi,%r12d
lea    0x0(,%r12,8),%edi
call   1040 <malloc@plt>
mov    %rax,%r14
test   %r12d,%r12d
jle    1172 <array2d+0x52>
mov    %r12d,%r15d
shl    $0x2,%r12d
xor    %ebx,%ebx
nopl   0x0(%rax)
mov    %r12d,%edi
call   1040 <malloc@plt>
mov    %rax,(%r14,%rbx,8)
mov    %rax,%rdi
xor    %esi,%esi
mov    %r12d,%edx
call   1030 <memset@plt>
add    $0x1,%rbx
cmp    %rbx,%r15
jne    1150 <array2d+0x30>
mov    %r14,%rax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
define i32** @array2d(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 8, %6
%8 = trunc i64 %7 to i32
%9 = call i64 @malloc(i32 %8)
%10 = inttoptr i64 %9 to i32**
store i32** %10, i32*** %3
store i32 0, i32* %4
br label %11
11: ; preds = %36, %1
%12 = load i32, i32* %4
%13 = load i32, i32* %2
%14 = icmp slt i32 %12, %13
br i1 %14, label %15, label %39
15: ; preds = %11
%16 = load i32, i32* %2
%17 = sext i32 %16 to i64
%18 = mul i64 4, %17
%19 = trunc i64 %18 to i32
%20 = call i64 @malloc(i32 %19)
%21 = inttoptr i64 %20 to i32*
%22 = load i32**, i32*** %3
%23 = load i32, i32* %4
%24 = sext i32 %23 to i64
%25 = getelementptr inbounds i32*, i32** %22, i64 %24
store i32* %21, i32** %25
%26 = load i32**, i32*** %3
%27 = load i32, i32* %4
%28 = sext i32 %27 to i64
%29 = getelementptr inbounds i32*, i32** %26, i64 %28
%30 = load i32*, i32** %29
%31 = load i32, i32* %2
%32 = sext i32 %31 to i64
%33 = mul i64 %32, 4
%34 = trunc i64 %33 to i32
%35 = call i32 @memset(i32* %30, i32 0, i32 %34)
br label %36
36: ; preds = %15
%37 = load i32, i32* %4
%38 = add nsw i32 %37, 1
store i32 %38, i32* %4
br label %11
39: ; preds = %11
%40 = load i32**, i32*** %3
ret i32** %40
}

LLVM IR (-O2):
define i32** @array2d(i32 %0) {
%2 = shl i32 %0, 3
%3 = tail call i64 @malloc(i32 %2)
%4 = inttoptr i64 %3 to i32**
%5 = icmp sgt i32 %0, 0
br i1 %5, label %6, label %9
6: ; preds = %1
%7 = shl i32 %0, 2
%8 = zext i32 %0 to i64
br label %10
9: ; preds = %10, %1
ret i32** %4
10: ; preds = %6, %10
%11 = phi i64 [ 0, %6 ], [ %16, %10 ]
%12 = tail call i64 @malloc(i32 %7)
%13 = inttoptr i64 %12 to i32*
%14 = getelementptr inbounds i32*, i32** %4, i64 %11
store i32* %13, i32** %14
%15 = tail call i32 @memset(i32* %13, i32 0, i32 %7)
%16 = add nuw nsw i64 %11, 1
%17 = icmp eq i64 %16, %8
br i1 %17, label %9, label %10
}