#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 main() {
  int i, j, b[3][3];
  int a[3][3] = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
  printf("这是原来的矩阵:\n");
  for (i = 0; i < 3; i++) {
    for (j = 0; j < 3; j++) {
      b[j][i] = a[i][j];
      printf("%d  ", a[i][j]);
    }
    printf("\n");
  }
  printf("\n");
  printf("这是转置后的矩阵:\n");
  for (i = 0; i < 3; i++) {
    for (j = 0; j < 3; j++) {
      printf("%d  ", b[i][j]);
    }
    printf("\n");
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x60,%rsp
movl   $0x0,-0x4(%rbp)
lea    -0x60(%rbp),%rdi
lea    0xec6(%rip),%rsi
mov    $0x24,%edx
call   1040 <memcpy@plt>
lea    0xed9(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x8(%rbp)
cmpl   $0x3,-0x8(%rbp)
jge    11ee <main+0xce>
movl   $0x0,-0xc(%rbp)
cmpl   $0x3,-0xc(%rbp)
jge    11d2 <main+0xb2>
movslq -0x8(%rbp),%rcx
lea    -0x60(%rbp),%rax
imul   $0xc,%rcx,%rcx
add    %rcx,%rax
movslq -0xc(%rbp),%rcx
mov    (%rax,%rcx,4),%edx
movslq -0xc(%rbp),%rcx
lea    -0x30(%rbp),%rax
imul   $0xc,%rcx,%rcx
add    %rcx,%rax
movslq -0x8(%rbp),%rcx
mov    %edx,(%rax,%rcx,4)
movslq -0x8(%rbp),%rcx
lea    -0x60(%rbp),%rax
imul   $0xc,%rcx,%rcx
add    %rcx,%rax
movslq -0xc(%rbp),%rcx
mov    (%rax,%rcx,4),%esi
lea    0xe7f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    116a <main+0x4a>
lea    0xe81(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    1159 <main+0x39>
lea    0xe65(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe3e(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x8(%rbp)
cmpl   $0x3,-0x8(%rbp)
jge    127a <main+0x15a>
movl   $0x0,-0xc(%rbp)
cmpl   $0x3,-0xc(%rbp)
jge    125e <main+0x13e>
movslq -0x8(%rbp),%rcx
lea    -0x30(%rbp),%rax
imul   $0xc,%rcx,%rcx
add    %rcx,%rax
movslq -0xc(%rbp),%rcx
mov    (%rax,%rcx,4),%esi
lea    0xdf3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    1222 <main+0x102>
lea    0xdf5(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    1211 <main+0xf1>
xor    %eax,%eax
add    $0x60,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xecd(%rip),%rdi
call   1040 <puts@plt>
lea    0xebc(%rip),%rbx
mov    %rbx,%rdi
mov    $0x1,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    %rbx,%rdi
mov    $0x4,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x5,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x6,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    %rbx,%rdi
mov    $0x7,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x8,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x9,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
lea    0xe22(%rip),%rdi
call   1040 <puts@plt>
mov    %rbx,%rdi
mov    $0x1,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x4,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x7,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x5,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x8,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x6,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x9,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@__const.main.a = [3 x [3 x i32]] [[3 x i32] [i32 1, i32 2, i32 3], [3 x i32] [i32 4, i32 5, i32 6], [3 x i32] [i32 7, i32 8, i32 9]]
@.str = [24 x i8] c"\E8\BF\99\E6\98\AF\E5\8E\9F\E6\9D\A5\E7\9A\84\E7\9F\A9\E9\98\B5:\0A\00"
@.str.1 = [5 x i8] c"%d \00"
@.str.2 = [2 x i8] c"\0A\00"
@.str.3 = [27 x i8] c"\E8\BF\99\E6\98\AF\E8\BD\AC\E7\BD\AE\E5\90\8E\E7\9A\84\E7\9F\A9\E9\98\B5:\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca [3 x [3 x i32]]
%5 = alloca [3 x [3 x i32]]
store i32 0, i32* %1
%6 = bitcast [3 x [3 x i32]]* %5 to i8*
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str, i64 0, i64 0))
store i32 0, i32* %2
br label %8
8: ; preds = %42, %0
%9 = load i32, i32* %2
%10 = icmp slt i32 %9, 3
br i1 %10, label %11, label %45
11: ; preds = %8
store i32 0, i32* %3
br label %12
12: ; preds = %37, %11
%13 = load i32, i32* %3
%14 = icmp slt i32 %13, 3
br i1 %14, label %15, label %40
15: ; preds = %12
%16 = load i32, i32* %2
%17 = sext i32 %16 to i64
%18 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %5, i64 0, i64 %17
%19 = load i32, i32* %3
%20 = sext i32 %19 to i64
%21 = getelementptr inbounds [3 x i32], [3 x i32]* %18, i64 0, i64 %20
%22 = load i32, i32* %21
%23 = load i32, i32* %3
%24 = sext i32 %23 to i64
%25 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %4, i64 0, i64 %24
%26 = load i32, i32* %2
%27 = sext i32 %26 to i64
%28 = getelementptr inbounds [3 x i32], [3 x i32]* %25, i64 0, i64 %27
store i32 %22, i32* %28
%29 = load i32, i32* %2
%30 = sext i32 %29 to i64
%31 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %5, i64 0, i64 %30
%32 = load i32, i32* %3
%33 = sext i32 %32 to i64
%34 = getelementptr inbounds [3 x i32], [3 x i32]* %31, i64 0, i64 %33
%35 = load i32, i32* %34
%36 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 %35)
br label %37
37: ; preds = %15
%38 = load i32, i32* %3
%39 = add nsw i32 %38, 1
store i32 %39, i32* %3
br label %12
40: ; preds = %12
%41 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
br label %42
42: ; preds = %40
%43 = load i32, i32* %2
%44 = add nsw i32 %43, 1
store i32 %44, i32* %2
br label %8
45: ; preds = %8
%46 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
%47 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.3, i64 0, i64 0))
store i32 0, i32* %2
br label %48
48: ; preds = %69, %45
%49 = load i32, i32* %2
%50 = icmp slt i32 %49, 3
br i1 %50, label %51, label %72
51: ; preds = %48
store i32 0, i32* %3
br label %52
52: ; preds = %64, %51
%53 = load i32, i32* %3
%54 = icmp slt i32 %53, 3
br i1 %54, label %55, label %67
55: ; preds = %52
%56 = load i32, i32* %2
%57 = sext i32 %56 to i64
%58 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* %4, i64 0, i64 %57
%59 = load i32, i32* %3
%60 = sext i32 %59 to i64
%61 = getelementptr inbounds [3 x i32], [3 x i32]* %58, i64 0, i64 %60
%62 = load i32, i32* %61
%63 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 %62)
br label %64
64: ; preds = %55
%65 = load i32, i32* %3
%66 = add nsw i32 %65, 1
store i32 %66, i32* %3
br label %52
67: ; preds = %52
%68 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
br label %69
69: ; preds = %67
%70 = load i32, i32* %2
%71 = add nsw i32 %70, 1
store i32 %71, i32* %2
br label %48
72: ; preds = %48
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [5 x i8] c"%d \00"
@str = [23 x i8] c"\E8\BF\99\E6\98\AF\E5\8E\9F\E6\9D\A5\E7\9A\84\E7\9F\A9\E9\98\B5:\00"
@str.4 = [26 x i8] c"\E8\BF\99\E6\98\AF\E8\BD\AC\E7\BD\AE\E5\90\8E\E7\9A\84\E7\9F\A9\E9\98\B5:\00"
define i32 @main() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([23 x i8], [23 x i8]* @str, i64 0, i64 0))
%2 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 1)
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 2)
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 3)
%5 = tail call i32 @putchar(i32 10)
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 4)
%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 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 6)
%9 = tail call i32 @putchar(i32 10)
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 7)
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 8)
%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 = tail call i32 @putchar(i32 10)
%14 = tail call i32 @putchar(i32 10)
%15 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @str.4, i64 0, i64 0))
%16 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 1)
%17 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 4)
%18 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 7)
%19 = tail call i32 @putchar(i32 10)
%20 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 2)
%21 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 5)
%22 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 8)
%23 = tail call i32 @putchar(i32 10)
%24 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 3)
%25 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 6)
%26 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 9)
%27 = tail call i32 @putchar(i32 10)
ret i32 0
}