#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 do_exec(char *, char *, int, int, int /*<<< orphan*/ *);
int /*<<< orphan*/ printf(char *, ...);
int main() {
  int rc;
  printf("ready to swap\n");
  rc = do_exec("command.com", "", 0x01 | 0x02 | 0x04, 0xffff, NULL);
  printf("rc = %d\n", rc);
  printf("done swap\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xecb(%rip),%rdi
lea    0xed8(%rip),%rsi
mov    $0x7,%edx
mov    $0xffff,%ecx
xor    %eax,%eax
mov    %eax,%r8d
call   1030 <do_exec@plt>
mov    %eax,-0x8(%rbp)
mov    -0x8(%rbp),%esi
lea    0xeaf(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xeaa(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xedd(%rip),%rdi
call   1030 <puts@plt>
lea    0xebc(%rip),%rdi
lea    0xec9(%rip),%rsi
mov    $0x7,%edx
mov    $0xffff,%ecx
xor    %r8d,%r8d
call   1040 <do_exec@plt>
lea    0xea8(%rip),%rdi
mov    %eax,%esi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xeaf(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [15 x i8] c"ready to swap\0A\00"
@.str.1 = [12 x i8] c"command.com\00"
@.str.2 = [1 x i8] zeroinitializer
@.str.3 = [9 x i8] c"rc = %d\0A\00"
@.str.4 = [11 x i8] c"done swap\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @do_exec(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str.2, i64 0, i64 0), i32 7, i32 65535, i32* null)
store i32 %4, i32* %2
%5 = load i32, i32* %2
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.3, i64 0, i64 0), i32 %5)
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.4, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [12 x i8] c"command.com\00"
@.str.2 = [1 x i8] zeroinitializer
@.str.3 = [9 x i8] c"rc = %d\0A\00"
@str = [14 x i8] c"ready to swap\00"
@str.5 = [10 x i8] c"done swap\00"
define i32 @main() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @str, i64 0, i64 0))
%2 = tail call i32 @do_exec(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str.2, i64 0, i64 0), i32 7, i32 65535, i32* null)
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str.3, i64 0, i64 0), i32 %2)
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([10 x i8], [10 x i8]* @str.5, i64 0, i64 0))
ret i32 0
}