4dc037019f
Add DXIL module flag bit offset for SHADER_FEATURE_FLAG. Added DXIL_MODULE_FLAG for DXIL module flag which does not have feature flag. Use DXILModuleFlags for ComputedShaderFlags instead of ShaderFeatureFlags. ComputedShaderFlags::getFeatureFlags() was added to get FeatureFlags. Rename DXContainerGlobals::getShaderFlags to DXContainerGlobals::getFeatureFlags. Fixes #57925
117 lines
3.9 KiB
C++
117 lines
3.9 KiB
C++
//===- DXContainerGlobals.cpp - DXContainer global generator 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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// DXContainerGlobalsPass implementation.
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//
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//===----------------------------------------------------------------------===//
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#include "DXILShaderFlags.h"
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#include "DirectX.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/BinaryFormat/DXContainer.h"
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#include "llvm/CodeGen/Passes.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/InitializePasses.h"
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#include "llvm/Pass.h"
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#include "llvm/Support/MD5.h"
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#include "llvm/Transforms/Utils/ModuleUtils.h"
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using namespace llvm;
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using namespace llvm::dxil;
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namespace {
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class DXContainerGlobals : public llvm::ModulePass {
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GlobalVariable *getFeatureFlags(Module &M);
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GlobalVariable *computeShaderHash(Module &M);
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public:
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static char ID; // Pass identification, replacement for typeid
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DXContainerGlobals() : ModulePass(ID) {
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initializeDXContainerGlobalsPass(*PassRegistry::getPassRegistry());
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}
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StringRef getPassName() const override {
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return "DXContainer Global Emitter";
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}
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bool runOnModule(Module &M) override;
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void getAnalysisUsage(AnalysisUsage &AU) const override {
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AU.setPreservesAll();
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AU.addRequired<ShaderFlagsAnalysisWrapper>();
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}
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};
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} // namespace
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bool DXContainerGlobals::runOnModule(Module &M) {
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llvm::SmallVector<GlobalValue *> Globals;
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Globals.push_back(getFeatureFlags(M));
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Globals.push_back(computeShaderHash(M));
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appendToCompilerUsed(M, Globals);
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return true;
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}
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GlobalVariable *DXContainerGlobals::getFeatureFlags(Module &M) {
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const uint64_t FeatureFlags =
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static_cast<uint64_t>(getAnalysis<ShaderFlagsAnalysisWrapper>()
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.getShaderFlags()
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.getFeatureFlags());
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Constant *FeatureFlagsConstant =
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ConstantInt::get(M.getContext(), APInt(64, FeatureFlags));
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auto *GV = new llvm::GlobalVariable(M, FeatureFlagsConstant->getType(), true,
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GlobalValue::PrivateLinkage,
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FeatureFlagsConstant, "dx.sfi0");
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GV->setSection("SFI0");
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GV->setAlignment(Align(4));
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return GV;
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}
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GlobalVariable *DXContainerGlobals::computeShaderHash(Module &M) {
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auto *DXILConstant =
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cast<ConstantDataArray>(M.getNamedGlobal("dx.dxil")->getInitializer());
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MD5 Digest;
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Digest.update(DXILConstant->getRawDataValues());
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MD5::MD5Result Result = Digest.final();
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dxbc::ShaderHash HashData = {0, {0}};
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// The Hash's IncludesSource flag gets set whenever the hashed shader includes
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// debug information.
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if (M.debug_compile_units_begin() != M.debug_compile_units_end())
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HashData.Flags = static_cast<uint32_t>(dxbc::HashFlags::IncludesSource);
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memcpy(reinterpret_cast<void *>(&HashData.Digest), Result.data(), 16);
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if (sys::IsBigEndianHost)
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HashData.swapBytes();
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StringRef Data(reinterpret_cast<char *>(&HashData), sizeof(dxbc::ShaderHash));
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Constant *ModuleConstant =
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ConstantDataArray::get(M.getContext(), arrayRefFromStringRef(Data));
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auto *GV = new llvm::GlobalVariable(M, ModuleConstant->getType(), true,
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GlobalValue::PrivateLinkage,
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ModuleConstant, "dx.hash");
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GV->setSection("HASH");
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GV->setAlignment(Align(4));
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return GV;
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}
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char DXContainerGlobals::ID = 0;
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INITIALIZE_PASS_BEGIN(DXContainerGlobals, "dxil-globals",
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"DXContainer Global Emitter", false, true)
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INITIALIZE_PASS_DEPENDENCY(ShaderFlagsAnalysisWrapper)
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INITIALIZE_PASS_END(DXContainerGlobals, "dxil-globals",
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"DXContainer Global Emitter", false, true)
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ModulePass *llvm::createDXContainerGlobalsPass() {
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return new DXContainerGlobals();
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}
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