#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 *, ...);
void main() {
  int a[3][3] = {{1, 5, 7}, {9, 12, 15}, {17, 20, 29}};
  void reverse(int a[][3]);
  int i, j;
  printf("before reverse the array:\n");
  for (i = 0; i < 3; i++) {
    for (j = 0; j < 3; j++) {
      printf("%3d ", a[i][j]);
    }
    printf("\n");
  }
  reverse(a);
  printf("after reverse the array:\n");
  for (i = 0; i < 3; i++) {
    for (j = 0; j < 3; j++) {
      printf("%3d ", a[i][j]);
    }
    printf("\n");
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x40,%rsp
lea    -0x30(%rbp),%rdi
lea    0xebd(%rip),%rsi
mov    $0x24,%edx
call   1050 <memcpy@plt>
lea    0xed0(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
movl   $0x0,-0x34(%rbp)
cmpl   $0x3,-0x34(%rbp)
jge    11cb <main+0x9b>
movl   $0x0,-0x38(%rbp)
cmpl   $0x3,-0x38(%rbp)
jge    11af <main+0x7f>
movslq -0x34(%rbp),%rcx
lea    -0x30(%rbp),%rax
imul   $0xc,%rcx,%rcx
add    %rcx,%rax
movslq -0x38(%rbp),%rcx
mov    (%rax,%rcx,4),%esi
lea    0xea5(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x38(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x38(%rbp)
jmp    1173 <main+0x43>
lea    0xe87(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x34(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x34(%rbp)
jmp    1162 <main+0x32>
lea    -0x30(%rbp),%rdi
call   1030 <reverse@plt>
lea    0xe69(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
movl   $0x0,-0x34(%rbp)
cmpl   $0x3,-0x34(%rbp)
jge    1252 <main+0x122>
movl   $0x0,-0x38(%rbp)
cmpl   $0x3,-0x38(%rbp)
jge    1236 <main+0x106>
movslq -0x34(%rbp),%rcx
lea    -0x30(%rbp),%rax
imul   $0xc,%rcx,%rcx
add    %rcx,%rax
movslq -0x38(%rbp),%rcx
mov    (%rax,%rcx,4),%esi
lea    0xe1e(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x38(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x38(%rbp)
jmp    11fa <main+0xca>
lea    0xe00(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x34(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x34(%rbp)
jmp    11e9 <main+0xb9>
add    $0x40,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x30,%rsp
mov    0xed5(%rip),%eax
mov    %eax,0x20(%rsp)
movaps 0xeba(%rip),%xmm0
movaps %xmm0,0x10(%rsp)
movaps 0xe9e(%rip),%xmm0
movaps %xmm0,(%rsp)
lea    0xebc(%rip),%rdi
call   1050 <puts@plt>
lea    0xeab(%rip),%rbx
mov    %rbx,%rdi
mov    $0x1,%esi
xor    %eax,%eax
call   1060 <printf@plt>
mov    %rbx,%rdi
mov    $0x5,%esi
xor    %eax,%eax
call   1060 <printf@plt>
mov    %rbx,%rdi
mov    $0x7,%esi
xor    %eax,%eax
call   1060 <printf@plt>
mov    $0xa,%edi
call   1040 <putchar@plt>
mov    %rbx,%rdi
mov    $0x9,%esi
xor    %eax,%eax
call   1060 <printf@plt>
mov    %rbx,%rdi
mov    $0xc,%esi
xor    %eax,%eax
call   1060 <printf@plt>
mov    %rbx,%rdi
mov    $0xf,%esi
xor    %eax,%eax
call   1060 <printf@plt>
mov    $0xa,%edi
call   1040 <putchar@plt>
mov    %rbx,%rdi
mov    $0x11,%esi
xor    %eax,%eax
call   1060 <printf@plt>
mov    %rbx,%rdi
mov    $0x14,%esi
xor    %eax,%eax
call   1060 <printf@plt>
mov    %rbx,%rdi
mov    $0x1d,%esi
xor    %eax,%eax
call   1060 <printf@plt>
mov    $0xa,%edi
call   1040 <putchar@plt>
mov    %rsp,%rdi
call   1030 <reverse@plt>
lea    0xe16(%rip),%rdi
call   1050 <puts@plt>
mov    (%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1060 <printf@plt>
mov    0x4(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1060 <printf@plt>
mov    0x8(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1060 <printf@plt>
mov    $0xa,%edi
call   1040 <putchar@plt>
mov    0xc(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1060 <printf@plt>
mov    0x10(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1060 <printf@plt>
mov    0x14(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1060 <printf@plt>
mov    $0xa,%edi
call   1040 <putchar@plt>
mov    0x18(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1060 <printf@plt>
mov    0x1c(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1060 <printf@plt>
mov    0x20(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1060 <printf@plt>
mov    $0xa,%edi
call   1040 <putchar@plt>
add    $0x30,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@__const.main.a = [3 x [3 x i32]] [[3 x i32] [i32 1, i32 5, i32 7], [3 x i32] [i32 9, i32 12, i32 15], [3 x i32] [i32 17, i32 20, i32 29]]
@.str = [27 x i8] c"before reverse the array:\0A\00"
@.str.1 = [5 x i8] c"%3d \00"
@.str.2 = [2 x i8] c"\0A\00"
@.str.3 = [26 x i8] c"after reverse the array:\0A\00"
define void @main() {
%1 = alloca [3 x [3 x i32]]
%2 = alloca i32
%3 = alloca i32
%4 = bitcast [3 x [3 x i32]]* %1 to i8*
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str, i64 0, i64 0))
store i32 0, i32* %2
br label %6
6: ; preds = %27, %0
%7 = load i32, i32* %2
%8 = icmp slt i32 %7, 3
br i1 %8, label %9, label %30
9: ; preds = %6
store i32 0, i32* %3
br label %10
10: ; preds = %22, %9
%11 = load i32, i32* %3
%12 = icmp slt i32 %11, 3
br i1 %12, label %13, label %25
13: ; preds = %10
%14 = load i32, i32* %2
%15 = sext i32 %14 to i64
%16 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 %15
%17 = load i32, i32* %3
%18 = sext i32 %17 to i64
%19 = getelementptr inbounds [3 x i32], [3 x i32]* %16, i64 0, i64 %18
%20 = load i32, i32* %19
%21 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 %20)
br label %22
22: ; preds = %13
%23 = load i32, i32* %3
%24 = add nsw i32 %23, 1
store i32 %24, i32* %3
br label %10
25: ; preds = %10
%26 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
br label %27
27: ; preds = %25
%28 = load i32, i32* %2
%29 = add nsw i32 %28, 1
store i32 %29, i32* %2
br label %6
30: ; preds = %6
%31 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 0
%32 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.3, i64 0, i64 0))
store i32 0, i32* %2
br label %33
33: ; preds = %54, %30
%34 = load i32, i32* %2
%35 = icmp slt i32 %34, 3
br i1 %35, label %36, label %57
36: ; preds = %33
store i32 0, i32* %3
br label %37
37: ; preds = %49, %36
%38 = load i32, i32* %3
%39 = icmp slt i32 %38, 3
br i1 %39, label %40, label %52
40: ; preds = %37
%41 = load i32, i32* %2
%42 = sext i32 %41 to i64
%43 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 %42
%44 = load i32, i32* %3
%45 = sext i32 %44 to i64
%46 = getelementptr inbounds [3 x i32], [3 x i32]* %43, i64 0, i64 %45
%47 = load i32, i32* %46
%48 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 %47)
br label %49
49: ; preds = %40
%50 = load i32, i32* %3
%51 = add nsw i32 %50, 1
store i32 %51, i32* %3
br label %37
52: ; preds = %37
%53 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
br label %54
54: ; preds = %52
%55 = load i32, i32* %2
%56 = add nsw i32 %55, 1
store i32 %56, i32* %2
br label %33
57: ; preds = %33
ret void
}

LLVM IR (-O2):
@__const.main.a = [3 x [3 x i32]] [[3 x i32] [i32 1, i32 5, i32 7], [3 x i32] [i32 9, i32 12, i32 15], [3 x i32] [i32 17, i32 20, i32 29]]
@.str.1 = [5 x i8] c"%3d \00"
@str = [26 x i8] c"before reverse the array:\00"
@str.4 = [25 x i8] c"after reverse the array:\00"
define void @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 ([26 x i8], [26 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 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 1)
%6 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 0, i64 1
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 5)
%8 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 0, i64 2
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 7)
%10 = tail call i32 @putchar(i32 10)
%11 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 1, i64 0
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 9)
%13 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 1, i64 1
%14 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 12)
%15 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 1, i64 2
%16 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 15)
%17 = tail call i32 @putchar(i32 10)
%18 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 2, i64 0
%19 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 17)
%20 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 2, i64 1
%21 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 20)
%22 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 2, i64 2
%23 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 29)
%24 = tail call i32 @putchar(i32 10)
%25 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %1, i64 0, i64 0
%26 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @str.4, i64 0, i64 0))
%27 = load i32, i32* %4
%28 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 %27)
%29 = load i32, i32* %6
%30 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 %29)
%31 = load i32, i32* %8
%32 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 %31)
%33 = call i32 @putchar(i32 10)
%34 = load i32, i32* %11
%35 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 %34)
%36 = load i32, i32* %13
%37 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 %36)
%38 = load i32, i32* %15
%39 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 %38)
%40 = call i32 @putchar(i32 10)
%41 = load i32, i32* %18
%42 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 %41)
%43 = load i32, i32* %20
%44 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 %43)
%45 = load i32, i32* %22
%46 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 %45)
%47 = call i32 @putchar(i32 10)
ret void
}