#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[3][3], sum = 0;
  int i, j;
  printf("enter data:\n");
  for (i = 0; i < 3; i++)
    for (j = 0; j < 3; j++)
      scanf("%3d", &a[i][j]);
  for (i = 0; i < 3; i++)
    sum = sum + a[i][i];
  printf("sum = %6d\n", sum);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x40,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x34(%rbp)
lea    0xec3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x38(%rbp)
cmpl   $0x3,-0x38(%rbp)
jge    11ad <main+0x8d>
movl   $0x0,-0x3c(%rbp)
cmpl   $0x3,-0x3c(%rbp)
jge    119a <main+0x7a>
movslq -0x38(%rbp),%rax
lea    -0x30(%rbp),%rsi
imul   $0xc,%rax,%rax
add    %rax,%rsi
movslq -0x3c(%rbp),%rax
shl    $0x2,%rax
add    %rax,%rsi
lea    0xe86(%rip),%rdi
call   1040 <scanf@plt>
mov    -0x3c(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x3c(%rbp)
jmp    115c <main+0x3c>
jmp    119f <main+0x7f>
mov    -0x38(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x38(%rbp)
jmp    114b <main+0x2b>
movl   $0x0,-0x38(%rbp)
cmpl   $0x3,-0x38(%rbp)
jge    11e8 <main+0xc8>
mov    -0x34(%rbp),%eax
movslq -0x38(%rbp),%rdx
lea    -0x30(%rbp),%rcx
imul   $0xc,%rdx,%rdx
add    %rdx,%rcx
movslq -0x38(%rbp),%rdx
add    (%rcx,%rdx,4),%eax
mov    %eax,-0x34(%rbp)
mov    -0x38(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x38(%rbp)
jmp    11b4 <main+0x94>
mov    -0x34(%rbp),%esi
lea    0xe1f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x40,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x30,%rsp
lea    0xed3(%rip),%rdi
call   1030 <puts@plt>
lea    0xeb8(%rip),%rbx
mov    %rsp,%rsi
mov    %rbx,%rdi
call   1050 <scanf@plt>
lea    0x4(%rsp),%rsi
mov    %rbx,%rdi
call   1050 <scanf@plt>
lea    0x8(%rsp),%rsi
mov    %rbx,%rdi
call   1050 <scanf@plt>
lea    0xc(%rsp),%rsi
mov    %rbx,%rdi
call   1050 <scanf@plt>
lea    0x10(%rsp),%rsi
mov    %rbx,%rdi
call   1050 <scanf@plt>
lea    0x14(%rsp),%rsi
mov    %rbx,%rdi
call   1050 <scanf@plt>
lea    0x18(%rsp),%rsi
mov    %rbx,%rdi
call   1050 <scanf@plt>
lea    0x1c(%rsp),%rsi
mov    %rbx,%rdi
call   1050 <scanf@plt>
lea    0x20(%rsp),%rsi
mov    %rbx,%rdi
call   1050 <scanf@plt>
mov    0x10(%rsp),%esi
add    (%rsp),%esi
add    0x20(%rsp),%esi
lea    0xe37(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [13 x i8] c"enter data:\0A\00"
@.str.1 = [4 x i8] c"%3d\00"
@.str.2 = [11 x i8] c"sum = %6d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [3 x [3 x i32]]
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %3
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0))
store i32 0, i32* %4
br label %7
7: ; preds = %26, %0
%8 = load i32, i32* %4
%9 = icmp slt i32 %8, 3
br i1 %9, label %10, label %29
10: ; preds = %7
store i32 0, i32* %5
br label %11
11: ; preds = %22, %10
%12 = load i32, i32* %5
%13 = icmp slt i32 %12, 3
br i1 %13, label %14, label %25
14: ; preds = %11
%15 = load i32, i32* %4
%16 = sext i32 %15 to i64
%17 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %2, i64 0, i64 %16
%18 = load i32, i32* %5
%19 = sext i32 %18 to i64
%20 = getelementptr inbounds [3 x i32], [3 x i32]* %17, i64 0, i64 %19
%21 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32* %20)
br label %22
22: ; preds = %14
%23 = load i32, i32* %5
%24 = add nsw i32 %23, 1
store i32 %24, i32* %5
br label %11
25: ; preds = %11
br label %26
26: ; preds = %25
%27 = load i32, i32* %4
%28 = add nsw i32 %27, 1
store i32 %28, i32* %4
br label %7
29: ; preds = %7
store i32 0, i32* %4
br label %30
30: ; preds = %43, %29
%31 = load i32, i32* %4
%32 = icmp slt i32 %31, 3
br i1 %32, label %33, label %46
33: ; preds = %30
%34 = load i32, i32* %3
%35 = load i32, i32* %4
%36 = sext i32 %35 to i64
%37 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %2, i64 0, i64 %36
%38 = load i32, i32* %4
%39 = sext i32 %38 to i64
%40 = getelementptr inbounds [3 x i32], [3 x i32]* %37, i64 0, i64 %39
%41 = load i32, i32* %40
%42 = add nsw i32 %34, %41
store i32 %42, i32* %3
br label %43
43: ; preds = %33
%44 = load i32, i32* %4
%45 = add nsw i32 %44, 1
store i32 %45, i32* %4
br label %30
46: ; preds = %30
%47 = load i32, i32* %3
%48 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32 %47)
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [4 x i8] c"%3d\00"
@.str.2 = [11 x i8] c"sum = %6d\0A\00"
@str = [12 x i8] c"enter data:\00"
define i32 @main() {
%1 = alloca [3 x [3 x i32]]
%2 = bitcast [3 x [3 x i32]]* %1 to i8*
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @str, i64 0, i64 0))
%4 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 0, i64 0
%5 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32* %4)
%6 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 0, i64 1
%7 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32* %6)
%8 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 0, i64 2
%9 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32* %8)
%10 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 1, i64 0
%11 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32* %10)
%12 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 1, i64 1
%13 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32* %12)
%14 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 1, i64 2
%15 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32* %14)
%16 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 2, i64 0
%17 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32* %16)
%18 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 2, i64 1
%19 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32* %18)
%20 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 2, i64 2
%21 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32* %20)
%22 = load i32, i32* %4
%23 = load i32, i32* %12
%24 = add nsw i32 %23, %22
%25 = load i32, i32* %20
%26 = add nsw i32 %25, %24
%27 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32 %26)
ret i32 0
}