From 0b57cec536236d46e3dba9bd041533462f33dbb7 Mon Sep 17 00:00:00 2001 From: Dimitry Andric Date: Fri, 20 Dec 2019 19:53:05 +0000 Subject: Move all sources from the llvm project into contrib/llvm-project. This uses the new layout of the upstream repository, which was recently migrated to GitHub, and converted into a "monorepo". That is, most of the earlier separate sub-projects with their own branches and tags were consolidated into one top-level directory, and are now branched and tagged together. Updating the vendor area to match this layout is next. --- .../llvm/lib/CodeGen/FEntryInserter.cpp | 52 ++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 contrib/llvm-project/llvm/lib/CodeGen/FEntryInserter.cpp (limited to 'contrib/llvm-project/llvm/lib/CodeGen/FEntryInserter.cpp') diff --git a/contrib/llvm-project/llvm/lib/CodeGen/FEntryInserter.cpp b/contrib/llvm-project/llvm/lib/CodeGen/FEntryInserter.cpp new file mode 100644 index 000000000000..a122f490884e --- /dev/null +++ b/contrib/llvm-project/llvm/lib/CodeGen/FEntryInserter.cpp @@ -0,0 +1,52 @@ +//===-- FEntryInsertion.cpp - Patchable prologues for LLVM -------------===// +// +// 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 +// +//===----------------------------------------------------------------------===// +// +// This file edits function bodies to insert fentry calls. +// +//===----------------------------------------------------------------------===// + +#include "llvm/CodeGen/MachineFunction.h" +#include "llvm/CodeGen/MachineFunctionPass.h" +#include "llvm/CodeGen/MachineInstrBuilder.h" +#include "llvm/CodeGen/Passes.h" +#include "llvm/CodeGen/TargetFrameLowering.h" +#include "llvm/CodeGen/TargetInstrInfo.h" +#include "llvm/CodeGen/TargetSubtargetInfo.h" +#include "llvm/IR/Function.h" +#include "llvm/IR/Module.h" + +using namespace llvm; + +namespace { +struct FEntryInserter : public MachineFunctionPass { + static char ID; // Pass identification, replacement for typeid + FEntryInserter() : MachineFunctionPass(ID) { + initializeFEntryInserterPass(*PassRegistry::getPassRegistry()); + } + + bool runOnMachineFunction(MachineFunction &F) override; +}; +} + +bool FEntryInserter::runOnMachineFunction(MachineFunction &MF) { + const std::string FEntryName = + MF.getFunction().getFnAttribute("fentry-call").getValueAsString(); + if (FEntryName != "true") + return false; + + auto &FirstMBB = *MF.begin(); + auto *TII = MF.getSubtarget().getInstrInfo(); + BuildMI(FirstMBB, FirstMBB.begin(), DebugLoc(), + TII->get(TargetOpcode::FENTRY_CALL)); + return true; +} + +char FEntryInserter::ID = 0; +char &llvm::FEntryInserterID = FEntryInserter::ID; +INITIALIZE_PASS(FEntryInserter, "fentry-insert", "Insert fentry calls", false, + false) -- cgit v1.2.3