#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*/ assert(int);
int /*<<< orphan*/ permute_str_aux(char *, char *, size_t);
int /*<<< orphan*/ printf(char *, ...);
size_t strlen(char *);
void permute_str(char src[], char target[]) {
  size_t len = strlen(src);
  assert(len == strlen(target));
  printf("%s", src);
  permute_str_aux(src, target, len);
  printf("\n");
}


x86 assembly (clang, -O0):
<permute_str>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x8(%rbp),%rdi
call   1030 <strlen@plt>
mov    %rax,-0x18(%rbp)
mov    -0x18(%rbp),%rax
mov    %rax,-0x20(%rbp)
mov    -0x10(%rbp),%rdi
call   1030 <strlen@plt>
mov    %rax,%rcx
mov    -0x20(%rbp),%rax
cmp    %rcx,%rax
sete   %al
and    $0x1,%al
movzbl %al,%edi
call   1050 <assert@plt>
mov    -0x8(%rbp),%rsi
lea    0xe70(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x8(%rbp),%rdi
mov    -0x10(%rbp),%rsi
mov    -0x18(%rbp),%rdx
call   1060 <permute_str_aux@plt>
lea    0xe54(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<permute_str>:
push   %r15
push   %r14
push   %rbx
mov    %rsi,%r14
mov    %rdi,%rbx
call   1040 <strlen@plt>
mov    %rax,%r15
mov    %r14,%rdi
call   1040 <strlen@plt>
xor    %edi,%edi
cmp    %rax,%r15
sete   %dil
call   1060 <assert@plt>
lea    0xe80(%rip),%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    %r14,%rsi
mov    %r15,%rdx
call   1070 <permute_str_aux@plt>
mov    $0xa,%edi
pop    %rbx
pop    %r14
pop    %r15
jmp    1030 <putchar@plt>

LLVM IR (-O0):
@.str = [3 x i8] c"%s\00"
@.str.1 = [2 x i8] c"\0A\00"
define void @permute_str(i8* %0, i8* %1) {
%3 = alloca i8*
%4 = alloca i8*
%5 = alloca i64
store i8* %0, i8** %3
store i8* %1, i8** %4
%6 = load i8*, i8** %3
%7 = call i64 @strlen(i8* %6)
store i64 %7, i64* %5
%8 = load i64, i64* %5
%9 = load i8*, i8** %4
%10 = call i64 @strlen(i8* %9)
%11 = icmp eq i64 %8, %10
%12 = zext i1 %11 to i32
%13 = call i32 @assert(i32 %12)
%14 = load i8*, i8** %3
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8* %14)
%16 = load i8*, i8** %3
%17 = load i8*, i8** %4
%18 = load i64, i64* %5
%19 = call i32 @permute_str_aux(i8* %16, i8* %17, i64 %18)
%20 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
ret void
}

LLVM IR (-O2):
@.str = [3 x i8] c"%s\00"
define void @permute_str(i8* %0, i8* %1) {
%3 = tail call i64 @strlen(i8* dereferenceable(1) %0)
%4 = tail call i64 @strlen(i8* dereferenceable(1) %1)
%5 = icmp eq i64 %3, %4
%6 = zext i1 %5 to i32
%7 = tail call i32 @assert(i32 %6)
%8 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8* %0)
%9 = tail call i32 @permute_str_aux(i8* %0, i8* %1, i64 %3)
%10 = tail call i32 @putchar(i32 10)
ret void
}