113 lines
3.8 KiB
C++
113 lines
3.8 KiB
C++
//===- DXContainerGlobals.cpp - DXContainer global generator pass ---------===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// DXContainerGlobalsPass implementation.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "DXILShaderFlags.h"
|
|
#include "DirectX.h"
|
|
#include "llvm/ADT/StringExtras.h"
|
|
#include "llvm/ADT/StringRef.h"
|
|
#include "llvm/BinaryFormat/DXContainer.h"
|
|
#include "llvm/CodeGen/Passes.h"
|
|
#include "llvm/IR/Constants.h"
|
|
#include "llvm/InitializePasses.h"
|
|
#include "llvm/Pass.h"
|
|
#include "llvm/Support/MD5.h"
|
|
#include "llvm/Transforms/Utils/ModuleUtils.h"
|
|
|
|
using namespace llvm;
|
|
using namespace llvm::dxil;
|
|
|
|
namespace {
|
|
class DXContainerGlobals : public llvm::ModulePass {
|
|
|
|
GlobalVariable *getShaderFlags(Module &M);
|
|
GlobalVariable *computeShaderHash(Module &M);
|
|
|
|
public:
|
|
static char ID; // Pass identification, replacement for typeid
|
|
DXContainerGlobals() : ModulePass(ID) {
|
|
initializeDXContainerGlobalsPass(*PassRegistry::getPassRegistry());
|
|
}
|
|
|
|
StringRef getPassName() const override {
|
|
return "DXContainer Global Emitter";
|
|
}
|
|
|
|
bool runOnModule(Module &M) override;
|
|
|
|
void getAnalysisUsage(AnalysisUsage &AU) const override {
|
|
AU.setPreservesAll();
|
|
AU.addRequired<ShaderFlagsAnalysisWrapper>();
|
|
}
|
|
};
|
|
|
|
} // namespace
|
|
|
|
bool DXContainerGlobals::runOnModule(Module &M) {
|
|
llvm::SmallVector<GlobalValue *> Globals;
|
|
Globals.push_back(getShaderFlags(M));
|
|
Globals.push_back(computeShaderHash(M));
|
|
|
|
appendToCompilerUsed(M, Globals);
|
|
return true;
|
|
}
|
|
|
|
GlobalVariable *DXContainerGlobals::getShaderFlags(Module &M) {
|
|
const uint64_t Flags =
|
|
(uint64_t)(getAnalysis<ShaderFlagsAnalysisWrapper>().getShaderFlags());
|
|
|
|
Constant *FlagsConstant = ConstantInt::get(M.getContext(), APInt(64, Flags));
|
|
auto *GV = new llvm::GlobalVariable(M, FlagsConstant->getType(), true,
|
|
GlobalValue::PrivateLinkage,
|
|
FlagsConstant, "dx.sfi0");
|
|
GV->setSection("SFI0");
|
|
GV->setAlignment(Align(4));
|
|
return GV;
|
|
}
|
|
|
|
GlobalVariable *DXContainerGlobals::computeShaderHash(Module &M) {
|
|
auto *DXILConstant =
|
|
cast<ConstantDataArray>(M.getNamedGlobal("dx.dxil")->getInitializer());
|
|
MD5 Digest;
|
|
Digest.update(DXILConstant->getRawDataValues());
|
|
MD5::MD5Result Result = Digest.final();
|
|
|
|
dxbc::ShaderHash HashData = {0, {0}};
|
|
// The Hash's IncludesSource flag gets set whenever the hashed shader includes
|
|
// debug information.
|
|
if (M.debug_compile_units_begin() != M.debug_compile_units_end())
|
|
HashData.Flags = static_cast<uint32_t>(dxbc::HashFlags::IncludesSource);
|
|
|
|
memcpy(reinterpret_cast<void *>(&HashData.Digest), Result.data(), 16);
|
|
if (sys::IsBigEndianHost)
|
|
HashData.swapBytes();
|
|
StringRef Data(reinterpret_cast<char *>(&HashData), sizeof(dxbc::ShaderHash));
|
|
|
|
Constant *ModuleConstant =
|
|
ConstantDataArray::get(M.getContext(), arrayRefFromStringRef(Data));
|
|
auto *GV = new llvm::GlobalVariable(M, ModuleConstant->getType(), true,
|
|
GlobalValue::PrivateLinkage,
|
|
ModuleConstant, "dx.hash");
|
|
GV->setSection("HASH");
|
|
GV->setAlignment(Align(4));
|
|
return GV;
|
|
}
|
|
|
|
char DXContainerGlobals::ID = 0;
|
|
INITIALIZE_PASS_BEGIN(DXContainerGlobals, "dxil-globals",
|
|
"DXContainer Global Emitter", false, true)
|
|
INITIALIZE_PASS_DEPENDENCY(ShaderFlagsAnalysisWrapper)
|
|
INITIALIZE_PASS_END(DXContainerGlobals, "dxil-globals",
|
|
"DXContainer Global Emitter", false, true)
|
|
|
|
ModulePass *llvm::createDXContainerGlobalsPass() {
|
|
return new DXContainerGlobals();
|
|
}
|