int main(int argc, char const *argv[]) {
  int i, j;
  int **A = (int **)malloc(5 * sizeof(int *));
  for (i = 0; i < 5; i++)
    A[i] = (int *)malloc(5 * sizeof(int));
  for (i = 0; i < 5; i++) {
    for (j = 0; j < 5; j++) {
      A[i][j] = i + j;
      printf("A = %d \t", A[i][j]);
    }
    printf("\n");
  }
  for (i = 0; i < 5; i++)
    free(A[i]);
  free(A);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    $0x28,%edi
call   1050 <malloc@plt>
mov    %rax,-0x20(%rbp)
movl   $0x0,-0x14(%rbp)
cmpl   $0x5,-0x14(%rbp)
jge    118c <main+0x5c>
mov    $0x14,%edi
call   1050 <malloc@plt>
mov    %rax,%rdx
mov    -0x20(%rbp),%rax
movslq -0x14(%rbp),%rcx
mov    %rdx,(%rax,%rcx,8)
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    115b <main+0x2b>
movl   $0x0,-0x14(%rbp)
cmpl   $0x5,-0x14(%rbp)
jge    1212 <main+0xe2>
movl   $0x0,-0x18(%rbp)
cmpl   $0x5,-0x18(%rbp)
jge    11f6 <main+0xc6>
mov    -0x14(%rbp),%edx
add    -0x18(%rbp),%edx
mov    -0x20(%rbp),%rax
movslq -0x14(%rbp),%rcx
mov    (%rax,%rcx,8),%rax
movslq -0x18(%rbp),%rcx
mov    %edx,(%rax,%rcx,4)
mov    -0x20(%rbp),%rax
movslq -0x14(%rbp),%rcx
mov    (%rax,%rcx,8),%rax
movslq -0x18(%rbp),%rcx
mov    (%rax,%rcx,4),%esi
lea    0xe1f(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x18(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x18(%rbp)
jmp    11a4 <main+0x74>
lea    0xe0c(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1193 <main+0x63>
movl   $0x0,-0x14(%rbp)
cmpl   $0x5,-0x14(%rbp)
jge    1242 <main+0x112>
mov    -0x20(%rbp),%rax
movslq -0x14(%rbp),%rcx
mov    (%rax,%rcx,8),%rdi
call   1030 <free@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1219 <main+0xe9>
mov    -0x20(%rbp),%rdi
call   1030 <free@plt>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xed8(%rip),%rbx
mov    %rbx,%rdi
xor    %esi,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x1,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x4,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    %rbx,%rdi
mov    $0x1,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x4,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x5,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x4,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x5,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x6,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x4,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x5,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x6,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x7,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    %rbx,%rdi
mov    $0x4,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x5,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x6,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x7,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x8,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [9 x i8] c"A = %d \09\00"
@.str.1 = [2 x i8] c"\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
%8 = alloca i32**
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%9 = call i8* @malloc(i64 40)
%10 = bitcast i8* %9 to i32**
store i32** %10, i32*** %8
store i32 0, i32* %6
br label %11
11: ; preds = %21, %2
%12 = load i32, i32* %6
%13 = icmp slt i32 %12, 5
br i1 %13, label %14, label %24
14: ; preds = %11
%15 = call i8* @malloc(i64 20)
%16 = bitcast i8* %15 to i32*
%17 = load i32**, i32*** %8
%18 = load i32, i32* %6
%19 = sext i32 %18 to i64
%20 = getelementptr inbounds i32*, i32** %17, i64 %19
store i32* %16, i32** %20
br label %21
21: ; preds = %14
%22 = load i32, i32* %6
%23 = add nsw i32 %22, 1
store i32 %23, i32* %6
br label %11
24: ; preds = %11
store i32 0, i32* %6
br label %25
25: ; preds = %59, %24
%26 = load i32, i32* %6
%27 = icmp slt i32 %26, 5
br i1 %27, label %28, label %62
28: ; preds = %25
store i32 0, i32* %7
br label %29
29: ; preds = %54, %28
%30 = load i32, i32* %7
%31 = icmp slt i32 %30, 5
br i1 %31, label %32, label %57
32: ; preds = %29
%33 = load i32, i32* %6
%34 = load i32, i32* %7
%35 = add nsw i32 %33, %34
%36 = load i32**, i32*** %8
%37 = load i32, i32* %6
%38 = sext i32 %37 to i64
%39 = getelementptr inbounds i32*, i32** %36, i64 %38
%40 = load i32*, i32** %39
%41 = load i32, i32* %7
%42 = sext i32 %41 to i64
%43 = getelementptr inbounds i32, i32* %40, i64 %42
store i32 %35, i32* %43
%44 = load i32**, i32*** %8
%45 = load i32, i32* %6
%46 = sext i32 %45 to i64
%47 = getelementptr inbounds i32*, i32** %44, i64 %46
%48 = load i32*, i32** %47
%49 = load i32, i32* %7
%50 = sext i32 %49 to i64
%51 = getelementptr inbounds i32, i32* %48, i64 %50
%52 = load i32, i32* %51
%53 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 %52)
br label %54
54: ; preds = %32
%55 = load i32, i32* %7
%56 = add nsw i32 %55, 1
store i32 %56, i32* %7
br label %29
57: ; preds = %29
%58 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
br label %59
59: ; preds = %57
%60 = load i32, i32* %6
%61 = add nsw i32 %60, 1
store i32 %61, i32* %6
br label %25
62: ; preds = %25
store i32 0, i32* %6
br label %63
63: ; preds = %73, %62
%64 = load i32, i32* %6
%65 = icmp slt i32 %64, 5
br i1 %65, label %66, label %76
66: ; preds = %63
%67 = load i32**, i32*** %8
%68 = load i32, i32* %6
%69 = sext i32 %68 to i64
%70 = getelementptr inbounds i32*, i32** %67, i64 %69
%71 = load i32*, i32** %70
%72 = bitcast i32* %71 to i8*
br label %73
73: ; preds = %66
%74 = load i32, i32* %6
%75 = add nsw i32 %74, 1
store i32 %75, i32* %6
br label %63
76: ; preds = %63
%77 = load i32**, i32*** %8
%78 = bitcast i32** %77 to i8*
%79 = load i32, i32* %3
ret i32 %79
}

LLVM IR (-O2):
@.str = [9 x i8] c"A = %d \09\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 0)
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 1)
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 2)
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 3)
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 4)
%8 = tail call i32 @putchar(i32 10)
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 1)
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 2)
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 3)
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 4)
%13 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 5)
%14 = tail call i32 @putchar(i32 10)
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 2)
%16 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 3)
%17 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 4)
%18 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 5)
%19 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 6)
%20 = tail call i32 @putchar(i32 10)
%21 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 3)
%22 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 4)
%23 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 5)
%24 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 6)
%25 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 7)
%26 = tail call i32 @putchar(i32 10)
%27 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 4)
%28 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 5)
%29 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 6)
%30 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 7)
%31 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 8)
%32 = tail call i32 @putchar(i32 10)
ret i32 0
}