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llvm-mirror/lib/Transforms/HelloNew/HelloWorld.cpp
Arthur Eubanks 75d5f2cf7a Reland [docs][NewPM] Add docs for writing NPM passes
As to not conflict with the legacy PM example passes under
llvm/lib/Transforms/Hello, this is under HelloNew. This makes the
CMakeLists.txt and general directory structure less confusing for people
following the example.

Much of the doc structure was taken from WritinAnLLVMPass.rst.

This adds a HelloWorld pass which simply prints out each function name.

More will follow after this, e.g. passes over different units of IR, analyses.
https://llvm.org/docs/WritingAnLLVMPass.html contains a lot more.

Relanded with missing "Support" dependency in LLVMBuild.txt.

Reviewed By: ychen, asbirlea

Differential Revision: https://reviews.llvm.org/D86979
2020-09-14 16:06:19 -07:00

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//===-- HelloWorld.cpp - Example Transformations --------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/Transforms/HelloNew/HelloWorld.h"
using namespace llvm;
PreservedAnalyses HelloWorldPass::run(Function &F,
FunctionAnalysisManager &AM) {
errs() << F.getName() << "\n";
return PreservedAnalyses::all();
}