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//===- DXILPostOptimizationValidation.cpp - Opt DXIL validation ----------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "DXILPostOptimizationValidation.h"
#include "DXILShaderFlags.h"
#include "DirectX.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Analysis/DXILMetadataAnalysis.h"
#include "llvm/Analysis/DXILResource.h"
#include "llvm/IR/DiagnosticInfo.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicsDirectX.h"
#include "llvm/IR/Module.h"
#include "llvm/InitializePasses.h"
#define DEBUG_TYPE "dxil-post-optimization-validation"
using namespace llvm;
using namespace llvm::dxil;
namespace {
static void reportInvalidDirection(Module &M, DXILResourceMap &DRM) {
for (const auto &UAV : DRM.uavs()) {
if (UAV.CounterDirection != ResourceCounterDirection::Invalid)
continue;
CallInst *ResourceHandle = nullptr;
for (CallInst *MaybeHandle : DRM.calls()) {
if (*DRM.find(MaybeHandle) == UAV) {
ResourceHandle = MaybeHandle;
break;
}
}
StringRef Message = "RWStructuredBuffers may increment or decrement their "
"counters, but not both.";
for (const auto &U : ResourceHandle->users()) {
const CallInst *CI = dyn_cast<CallInst>(U);
if (!CI && CI->getIntrinsicID() != Intrinsic::dx_resource_updatecounter)
continue;
M.getContext().diagnose(DiagnosticInfoGenericWithLoc(
Message, *CI->getFunction(), CI->getDebugLoc()));
}
}
}
static void reportOverlappingError(Module &M, ResourceInfo R1,
ResourceInfo R2) {
SmallString<128> Message;
raw_svector_ostream OS(Message);
OS << "resource " << R1.getName() << " at register "
<< R1.getBinding().LowerBound << " overlaps with resource " << R2.getName()
<< " at register " << R2.getBinding().LowerBound << " in space "
<< R2.getBinding().Space;
M.getContext().diagnose(DiagnosticInfoGeneric(Message));
}
static void reportOverlappingBinding(Module &M, DXILResourceMap &DRM) {
if (DRM.empty())
return;
for (const auto &ResList :
{DRM.srvs(), DRM.uavs(), DRM.cbuffers(), DRM.samplers()}) {
if (ResList.empty())
continue;
const ResourceInfo *PrevRI = &*ResList.begin();
for (auto *I = ResList.begin() + 1; I != ResList.end(); ++I) {
const ResourceInfo *CurrentRI = &*I;
const ResourceInfo *RI = CurrentRI;
while (RI != ResList.end() &&
PrevRI->getBinding().overlapsWith(RI->getBinding())) {
reportOverlappingError(M, *PrevRI, *RI);
RI++;
}
PrevRI = CurrentRI;
}
}
}
static void reportErrors(Module &M, DXILResourceMap &DRM,
DXILResourceBindingInfo &DRBI) {
if (DRM.hasInvalidCounterDirection())
reportInvalidDirection(M, DRM);
if (DRBI.hasOverlappingBinding())
reportOverlappingBinding(M, DRM);
assert(!DRBI.hasImplicitBinding() && "implicit bindings should be handled in "
"DXILResourceImplicitBinding pass");
}
} // namespace
PreservedAnalyses
DXILPostOptimizationValidation::run(Module &M, ModuleAnalysisManager &MAM) {
DXILResourceMap &DRM = MAM.getResult<DXILResourceAnalysis>(M);
DXILResourceBindingInfo &DRBI = MAM.getResult<DXILResourceBindingAnalysis>(M);
reportErrors(M, DRM, DRBI);
return PreservedAnalyses::all();
}
namespace {
class DXILPostOptimizationValidationLegacy : public ModulePass {
public:
bool runOnModule(Module &M) override {
DXILResourceMap &DRM =
getAnalysis<DXILResourceWrapperPass>().getResourceMap();
DXILResourceBindingInfo &DRBI =
getAnalysis<DXILResourceBindingWrapperPass>().getBindingInfo();
reportErrors(M, DRM, DRBI);
return false;
}
StringRef getPassName() const override {
return "DXIL Post Optimization Validation";
}
DXILPostOptimizationValidationLegacy() : ModulePass(ID) {}
static char ID; // Pass identification.
void getAnalysisUsage(llvm::AnalysisUsage &AU) const override {
AU.addRequired<DXILResourceWrapperPass>();
AU.addRequired<DXILResourceBindingWrapperPass>();
AU.addPreserved<DXILResourceWrapperPass>();
AU.addPreserved<DXILResourceBindingWrapperPass>();
AU.addPreserved<DXILMetadataAnalysisWrapperPass>();
AU.addPreserved<ShaderFlagsAnalysisWrapper>();
}
};
char DXILPostOptimizationValidationLegacy::ID = 0;
} // end anonymous namespace
INITIALIZE_PASS_BEGIN(DXILPostOptimizationValidationLegacy, DEBUG_TYPE,
"DXIL Post Optimization Validation", false, false)
INITIALIZE_PASS_DEPENDENCY(DXILResourceBindingWrapperPass)
INITIALIZE_PASS_DEPENDENCY(DXILResourceTypeWrapperPass)
INITIALIZE_PASS_DEPENDENCY(DXILResourceWrapperPass)
INITIALIZE_PASS_END(DXILPostOptimizationValidationLegacy, DEBUG_TYPE,
"DXIL Post Optimization Validation", false, false)
ModulePass *llvm::createDXILPostOptimizationValidationLegacyPass() {
return new DXILPostOptimizationValidationLegacy();
}
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