#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 */
typedef int /*<<< orphan*/ FILE;

/* Variables and functions */
int /*<<< orphan*/ fprintf(int /*<<< orphan*/ *, char *);
int /*<<< orphan*/ pclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *popen(char *, char *);
int main() {
  FILE *stream = popen("sort", "w");
  fprintf(stream, "hi\n");
  fprintf(stream, "hello\n");
  fprintf(stream, "hey\n");
  pclose(stream);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
lea    0xeb8(%rip),%rsi
call   1050 <popen@plt>
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xea6(%rip),%rsi
call   1040 <fprintf@plt>
mov    -0x10(%rbp),%rdi
lea    0xe9a(%rip),%rsi
call   1040 <fprintf@plt>
mov    -0x10(%rbp),%rdi
lea    0xe91(%rip),%rsi
call   1040 <fprintf@plt>
mov    -0x10(%rbp),%rdi
call   1030 <pclose@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xec8(%rip),%rdi
lea    0xec6(%rip),%rsi
call   1040 <popen@plt>
mov    %rax,%rbx
lea    0xeb9(%rip),%rdi
mov    $0x3,%esi
mov    $0x1,%edx
mov    %rax,%rcx
call   1050 <fwrite@plt>
lea    0xea4(%rip),%rdi
mov    $0x6,%esi
mov    $0x1,%edx
mov    %rbx,%rcx
call   1050 <fwrite@plt>
lea    0xe92(%rip),%rdi
mov    $0x4,%esi
mov    $0x1,%edx
mov    %rbx,%rcx
call   1050 <fwrite@plt>
mov    %rbx,%rdi
call   1030 <pclose@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [5 x i8] c"sort\00"
@.str.1 = [2 x i8] c"w\00"
@.str.2 = [4 x i8] c"hi\0A\00"
@.str.3 = [7 x i8] c"hello\0A\00"
@.str.4 = [5 x i8] c"hey\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32*
store i32 0, i32* %1
%3 = call i32* @popen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
store i32* %3, i32** %2
%4 = load i32*, i32** %2
%5 = call i32 @fprintf(i32* %4, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0))
%6 = load i32*, i32** %2
%7 = call i32 @fprintf(i32* %6, i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.3, i64 0, i64 0))
%8 = load i32*, i32** %2
%9 = call i32 @fprintf(i32* %8, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.4, i64 0, i64 0))
%10 = load i32*, i32** %2
%11 = call i32 @pclose(i32* %10)
ret i32 0
}

LLVM IR (-O2):
@.str = [5 x i8] c"sort\00"
@.str.1 = [2 x i8] c"w\00"
@.str.2 = [4 x i8] c"hi\0A\00"
@.str.3 = [7 x i8] c"hello\0A\00"
@.str.4 = [5 x i8] c"hey\0A\00"
define i32 @main() {
%1 = tail call i32* @popen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%2 = tail call i64 @fwrite(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i64 3, i64 1, i32* %1)
%3 = tail call i64 @fwrite(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.3, i64 0, i64 0), i64 6, i64 1, i32* %1)
%4 = tail call i64 @fwrite(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.4, i64 0, i64 0), i64 4, i64 1, i32* %1)
%5 = tail call i32 @pclose(i32* %1)
ret i32 0
}