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2592ccdea7
We randomly use outs() or errs(), which makes test logs confusing. We also randomly add/don't add a line afterward. Reviewed By: arsenm Differential Revision: https://reviews.llvm.org/D136130
81 lines
2.8 KiB
C++
81 lines
2.8 KiB
C++
//===- ReduceMetadata.cpp - Specialized Delta Pass ------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements two functions used by the Generic Delta Debugging
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// Algorithm, which are used to reduce Metadata nodes.
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//
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//===----------------------------------------------------------------------===//
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#include "ReduceMetadata.h"
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#include "Delta.h"
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#include "llvm/ADT/Sequence.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/IR/InstIterator.h"
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#include "llvm/IR/IntrinsicInst.h"
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#include <vector>
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using namespace llvm;
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static bool shouldKeepDebugIntrinsicMetadata(Instruction &I, MDNode &MD) {
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return isa<DILocation>(MD) && isa<DbgInfoIntrinsic>(I);
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}
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static bool shouldKeepDebugNamedMetadata(NamedMDNode &MD) {
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return MD.getName() == "llvm.dbg.cu" && MD.getNumOperands() != 0;
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}
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/// Removes all the Named and Unnamed Metadata Nodes, as well as any debug
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/// functions that aren't inside the desired Chunks.
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static void extractMetadataFromModule(Oracle &O, Module &Program) {
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// Get out-of-chunk Named metadata nodes
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SmallVector<NamedMDNode *> NamedNodesToDelete;
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for (NamedMDNode &MD : Program.named_metadata())
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if (!shouldKeepDebugNamedMetadata(MD) && !O.shouldKeep())
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NamedNodesToDelete.push_back(&MD);
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for (NamedMDNode *NN : NamedNodesToDelete) {
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for (auto I : seq<unsigned>(0, NN->getNumOperands()))
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NN->setOperand(I, nullptr);
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NN->eraseFromParent();
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}
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// Delete out-of-chunk metadata attached to globals.
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for (GlobalVariable &GV : Program.globals()) {
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SmallVector<std::pair<unsigned, MDNode *>> MDs;
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GV.getAllMetadata(MDs);
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for (std::pair<unsigned, MDNode *> &MD : MDs)
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if (!O.shouldKeep())
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GV.setMetadata(MD.first, nullptr);
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}
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for (Function &F : Program) {
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{
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SmallVector<std::pair<unsigned, MDNode *>> MDs;
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// Delete out-of-chunk metadata attached to functions.
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F.getAllMetadata(MDs);
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for (std::pair<unsigned, MDNode *> &MD : MDs)
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if (!O.shouldKeep())
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F.setMetadata(MD.first, nullptr);
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}
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// Delete out-of-chunk metadata attached to instructions.
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for (Instruction &I : instructions(F)) {
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SmallVector<std::pair<unsigned, MDNode *>> MDs;
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I.getAllMetadata(MDs);
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for (std::pair<unsigned, MDNode *> &MD : MDs) {
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if (!shouldKeepDebugIntrinsicMetadata(I, *MD.second) && !O.shouldKeep())
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I.setMetadata(MD.first, nullptr);
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}
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}
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}
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}
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void llvm::reduceMetadataDeltaPass(TestRunner &Test) {
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runDeltaPass(Test, extractMetadataFromModule, "Reducing Metadata");
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}
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