LLVM  9.0.0svn
SystemUtils.cpp
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1 //===- SystemUtils.cpp - Utilities for low-level system tasks -------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file contains functions used to do a variety of low-level, often
10 // system-specific, tasks.
11 //
12 //===----------------------------------------------------------------------===//
13 
16 using namespace llvm;
17 
19  bool print_warning) {
20  if (stream_to_check.is_displayed()) {
21  if (print_warning) {
22  errs() << "WARNING: You're attempting to print out a bitcode file.\n"
23  "This is inadvisable as it may cause display problems. If\n"
24  "you REALLY want to taste LLVM bitcode first-hand, you\n"
25  "can force output with the `-f' option.\n\n";
26  }
27  return true;
28  }
29  return false;
30 }
raw_ostream & errs()
This returns a reference to a raw_ostream for standard error.
This class represents lattice values for constants.
Definition: AllocatorList.h:23
bool CheckBitcodeOutputToConsole(raw_ostream &stream_to_check, bool print_warning=true)
Determine if the raw_ostream provided is connected to a terminal.
Definition: SystemUtils.cpp:18
virtual bool is_displayed() const
This function determines if this stream is connected to a "tty" or "console" window.
Definition: raw_ostream.h:275
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:45