================ @@ -0,0 +1,108 @@ +//===- HLSLRootSignature.cpp - HLSL Root Signature helper objects +//----------===// +// +// 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 +// +//===----------------------------------------------------------------------===// +/// +/// \file This file contains helpers for working with HLSL Root Signatures. +/// +//===----------------------------------------------------------------------===// + +#include "llvm/Frontend/HLSL/HLSLRootSignature.h" +#include "llvm/IR/IRBuilder.h" +#include "llvm/IR/Metadata.h" +#include "llvm/IR/Module.h" + +namespace llvm { +namespace hlsl { +namespace rootsig { + +// Static helper functions + +static MDString *ClauseTypeToName(LLVMContext &Ctx, ClauseType Type) { + StringRef Name; + switch (Type) { + case ClauseType::CBuffer: + Name = "CBV"; + break; + case ClauseType::SRV: + Name = "SRV"; + break; + case ClauseType::UAV: + Name = "UAV"; + break; + case ClauseType::Sampler: + Name = "Sampler"; + break; + } + return MDString::get(Ctx, Name); +} + +// Helper struct so that we can use the overloaded notation of std::visit +template <class... Ts> struct OverloadBuilds : Ts... { + using Ts::operator()...; +}; +template <class... Ts> OverloadBuilds(Ts...) -> OverloadBuilds<Ts...>; + +MDNode *MetadataBuilder::BuildRootSignature() { + for (const RootElement &Element : Elements) { + MDNode *ElementMD = + std::visit(OverloadBuilds{ ---------------- bob80905 wrote:
Could you add a comment here for clarity? Something like "for each element, if it's a desctable, run this, if its a desctableclause, run this" Had to look up what std::visit does to understand this. https://github.com/llvm/llvm-project/pull/125131 _______________________________________________ llvm-branch-commits mailing list llvm-branch-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
