#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*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char const *, char *);
int /*<<< orphan*/ fwrite(char const *, int, int, int /*<<< orphan*/ *);
int /*<<< orphan*/ printf(char *, char const *);
void write_tty(const char *tty, const char *data, int len) {
  FILE *fp = fopen(tty, "w");
  if (!fp) {
    printf("Error opening %s\n", tty);
    return;
  }
  fwrite(data, 1, len, fp);
  fclose(fp);
}


x86 assembly (clang, -O0):
<write_tty>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    %edx,-0x14(%rbp)
mov    -0x8(%rbp),%rdi
lea    0xea2(%rip),%rsi
call   1050 <fopen@plt>
mov    %rax,-0x20(%rbp)
cmpq   $0x0,-0x20(%rbp)
jne    1187 <write_tty+0x47>
mov    -0x8(%rbp),%rsi
lea    0xe85(%rip),%rdi
call   1040 <printf@plt>
jmp    11a5 <write_tty+0x65>
mov    -0x10(%rbp),%rdi
mov    -0x14(%rbp),%edx
mov    -0x20(%rbp),%rcx
mov    $0x1,%esi
call   1060 <fwrite@plt>
mov    -0x20(%rbp),%rdi
call   1030 <fclose@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<write_tty>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
mov    %edx,%r14d
mov    %rsi,%r15
mov    %rdi,%rbp
lea    0xea9(%rip),%rsi
call   1050 <fopen@plt>
test   %rax,%rax
je     1189 <write_tty+0x49>
mov    %rax,%rbx
mov    %r15,%rdi
mov    $0x1,%esi
mov    %r14d,%edx
mov    %rax,%rcx
call   1060 <fwrite@plt>
mov    %rbx,%rdi
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
jmp    1030 <fclose@plt>
lea    0xe72(%rip),%rdi
mov    %rbp,%rsi
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
jmp    1040 <printf@plt>

LLVM IR (-O0):
@.str = [2 x i8] c"w\00"
@.str.1 = [18 x i8] c"Error opening %s\0A\00"
define void @write_tty(i8* %0, i8* %1, i32 %2) {
%4 = alloca i8*
%5 = alloca i8*
%6 = alloca i32
%7 = alloca i32*
store i8* %0, i8** %4
store i8* %1, i8** %5
store i32 %2, i32* %6
%8 = load i8*, i8** %4
%9 = call i32* @fopen(i8* %8, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i32* %9, i32** %7
%10 = load i32*, i32** %7
%11 = icmp ne i32* %10, null
br i1 %11, label %15, label %12
12: ; preds = %3
%13 = load i8*, i8** %4
%14 = call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.1, i64 0, i64 0), i8* %13)
br label %22
15: ; preds = %3
%16 = load i8*, i8** %5
%17 = load i32, i32* %6
%18 = load i32*, i32** %7
%19 = call i32 @fwrite(i8* %16, i32 1, i32 %17, i32* %18)
%20 = load i32*, i32** %7
%21 = call i32 @fclose(i32* %20)
br label %22
22: ; preds = %15, %12
ret void
}

LLVM IR (-O2):
@.str = [2 x i8] c"w\00"
@.str.1 = [18 x i8] c"Error opening %s\0A\00"
define void @write_tty(i8* %0, i8* nocapture %1, i32 %2) {
%4 = tail call i32* @fopen(i8* %0, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%5 = icmp eq i32* %4, null
br i1 %5, label %6, label %8
6: ; preds = %3
%7 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.1, i64 0, i64 0), i8* %0)
br label %11
8: ; preds = %3
%9 = tail call i32 @fwrite(i8* %1, i32 1, i32 %2, i32* %4)
%10 = tail call i32 @fclose(i32* %4)
br label %11
11: ; preds = %8, %6
ret void
}