| 1 | //===- DXILUpgrade.cpp - Upgrade DXIL metadata to LLVM constructs ---------===// |
|---|---|
| 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 | #include "llvm/Transforms/Utils/DXILUpgrade.h" |
| 10 | #include "llvm/IR/Constants.h" |
| 11 | #include "llvm/IR/Metadata.h" |
| 12 | #include "llvm/IR/Module.h" |
| 13 | #include "llvm/Support/Debug.h" |
| 14 | |
| 15 | using namespace llvm; |
| 16 | |
| 17 | #define DEBUG_TYPE "dxil-upgrade" |
| 18 | |
| 19 | static bool handleValVerMetadata(Module &M) { |
| 20 | NamedMDNode *ValVer = M.getNamedMetadata(Name: "dx.valver"); |
| 21 | if (!ValVer) |
| 22 | return false; |
| 23 | |
| 24 | LLVM_DEBUG({ |
| 25 | MDNode *N = ValVer->getOperand(0); |
| 26 | auto X = mdconst::extract<ConstantInt>(N->getOperand(0))->getZExtValue(); |
| 27 | auto Y = mdconst::extract<ConstantInt>(N->getOperand(1))->getZExtValue(); |
| 28 | dbgs() << "DXIL: validation version: "<< X << "."<< Y << "\n"; |
| 29 | }); |
| 30 | // We don't need the validation version internally, so we drop it. |
| 31 | ValVer->dropAllReferences(); |
| 32 | ValVer->eraseFromParent(); |
| 33 | return true; |
| 34 | } |
| 35 | |
| 36 | PreservedAnalyses DXILUpgradePass::run(Module &M, ModuleAnalysisManager &AM) { |
| 37 | PreservedAnalyses PA; |
| 38 | // We never add, remove, or change functions here. |
| 39 | PA.preserve<FunctionAnalysisManagerModuleProxy>(); |
| 40 | PA.preserveSet<AllAnalysesOn<Function>>(); |
| 41 | |
| 42 | bool Changed = false; |
| 43 | Changed |= handleValVerMetadata(M); |
| 44 | |
| 45 | if (!Changed) |
| 46 | return PreservedAnalyses::all(); |
| 47 | return PA; |
| 48 | } |
| 49 |