#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, int);
main() {
  int a[10], i;
  for (i = 0; i < 10; i++) {
    a[i] = 9 - i;
  }
  for (i = 0; i < 10; i++) {
    a[i] = a[a[i]];
  }
  for (i = 0; i < 10; i++) {
    printf("a[%d]: %d\n", i, a[i]);
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x40,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x34(%rbp)
cmpl   $0xa,-0x34(%rbp)
jge    114e <main+0x3e>
mov    $0x9,%ecx
sub    -0x34(%rbp),%ecx
movslq -0x34(%rbp),%rax
mov    %ecx,-0x30(%rbp,%rax,4)
mov    -0x34(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x34(%rbp)
jmp    1126 <main+0x16>
movl   $0x0,-0x34(%rbp)
cmpl   $0xa,-0x34(%rbp)
jge    1182 <main+0x72>
movslq -0x34(%rbp),%rax
movslq -0x30(%rbp,%rax,4),%rax
mov    -0x30(%rbp,%rax,4),%ecx
movslq -0x34(%rbp),%rax
mov    %ecx,-0x30(%rbp,%rax,4)
mov    -0x34(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x34(%rbp)
jmp    1155 <main+0x45>
movl   $0x0,-0x34(%rbp)
cmpl   $0xa,-0x34(%rbp)
jge    11b8 <main+0xa8>
mov    -0x34(%rbp),%esi
movslq -0x34(%rbp),%rax
mov    -0x30(%rbp,%rax,4),%edx
lea    0xe5b(%rip),%rdi
call   1030 <printf@plt>
mov    -0x34(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x34(%rbp)
jmp    1189 <main+0x79>
mov    -0x4(%rbp),%eax
add    $0x40,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xee8(%rip),%rbx
mov    %rbx,%rdi
xor    %esi,%esi
xor    %edx,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x1,%esi
mov    $0x1,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
mov    $0x2,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
mov    $0x3,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x4,%esi
mov    $0x4,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x5,%esi
mov    $0x4,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x6,%esi
mov    $0x3,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x7,%esi
mov    $0x2,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x8,%esi
mov    $0x1,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x9,%esi
xor    %edx,%edx
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

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

LLVM IR (-O2):
@.str = [11 x i8] c"a[%d]: %d\0A\00"
define i32 @main() {
%1 = tail call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i32 0, i32 0)
%2 = tail call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i32 1, i32 1)
%3 = tail call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i32 2, i32 2)
%4 = tail call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i32 3, i32 3)
%5 = tail call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i32 4, i32 4)
%6 = tail call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i32 5, i32 4)
%7 = tail call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i32 6, i32 3)
%8 = tail call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i32 7, i32 2)
%9 = tail call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i32 8, i32 1)
%10 = tail call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i32 9, i32 0)
ret i32 0
}