39 lines
1.5 KiB
C++
39 lines
1.5 KiB
C++
//===- ReduceDPValues.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 a function which calls the Generic Delta pass in order
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// to reduce uninteresting DPValues from defined functions.
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//
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// DPValues store variable-location debug-info and are attached to instructions.
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// This information used to be represented by intrinsics such as dbg.value, and
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// would naturally get reduced by llvm-reduce like any other instruction. As
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// DPValues get stored elsewhere, they need to be enumerated and eliminated like
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// any other data structure in LLVM.
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//
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//===----------------------------------------------------------------------===//
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#include "ReduceDPValues.h"
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#include "Utils.h"
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#include "llvm/ADT/STLExtras.h"
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using namespace llvm;
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static void extractDPValuesFromModule(Oracle &O, ReducerWorkItem &WorkItem) {
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Module &M = WorkItem.getModule();
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for (auto &F : M)
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for (auto &BB : F)
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for (auto &I : BB)
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for (DPValue &DPV : llvm::make_early_inc_range(I.getDbgValueRange()))
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if (!O.shouldKeep())
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DPV.eraseFromParent();
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}
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void llvm::reduceDPValuesDeltaPass(TestRunner &Test) {
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runDeltaPass(Test, extractDPValuesFromModule, "Reducing DPValues");
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}
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