================ @@ -0,0 +1,108 @@ +//===- SPIRVPushConstantAccess.cpp - Translate CBuffer Loads ---------*- C++ +//-*-===// +// +// 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 +// +//===----------------------------------------------------------------------===// +// +// This pass changes the types of all the globals in the PushConstant +// address space into a target extension type, and makes all references +// to this global go though a custom SPIR-V intrinsic. +// +// This allows the backend to properly lower the push constant struct type +// to a fully laid out type, and generate the proper OpAccessChain. +// +//===----------------------------------------------------------------------===// + +#include "SPIRVPushConstantAccess.h" +#include "SPIRV.h" +#include "SPIRVSubtarget.h" +#include "SPIRVTargetMachine.h" +#include "SPIRVUtils.h" +#include "llvm/Frontend/HLSL/CBuffer.h" +#include "llvm/IR/IRBuilder.h" +#include "llvm/IR/IntrinsicsSPIRV.h" +#include "llvm/IR/Module.h" +#include "llvm/IR/ReplaceConstant.h" + +#define DEBUG_TYPE "spirv-pushconstant-access" +using namespace llvm; + +static bool replacePushConstantAccesses(Module &M, SPIRVGlobalRegistry *GR) { + SmallVector<GlobalVariable *> PushConstants; + for (GlobalVariable &GV : M.globals()) { + if (GV.getAddressSpace() == + storageClassToAddressSpace(SPIRV::StorageClass::PushConstant)) + PushConstants.push_back(&GV); + } + + for (GlobalVariable *GV : PushConstants) { + Type *PCType = llvm::TargetExtType::get( + M.getContext(), "spirv.PushConstant", {GV->getValueType()}); + GlobalVariable *NewGV = new GlobalVariable( + M, PCType, GV->isConstant(), GV->getLinkage(), + /* initializer= */ nullptr, GV->getName(), + /* InsertBefore= */ GV, GV->getThreadLocalMode(), GV->getAddressSpace(), + GV->isExternallyInitialized()); + + SmallVector<User *, 4> Users(GV->user_begin(), GV->user_end()); + for (llvm::User *U : Users) { + Instruction *I = dyn_cast<Instruction>(U); + if (!I) + continue; ---------------- s-perron wrote:
What are the non instruction uses, and why is it okay to leave them as is? Looking at the tests, I don't see any case where this happens. https://github.com/llvm/llvm-project/pull/166793 _______________________________________________ cfe-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
