63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
//===- CBuffer.h - HLSL constant buffer handling ----------------*- C++ -*-===//
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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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/// \file This file contains utilities to work with constant buffers in HLSL.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_FRONTEND_HLSL_CBUFFER_H
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#define LLVM_FRONTEND_HLSL_CBUFFER_H
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/IR/DataLayout.h"
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#include "llvm/IR/DerivedTypes.h"
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#include <optional>
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namespace llvm {
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class Module;
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class GlobalVariable;
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class NamedMDNode;
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namespace hlsl {
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struct CBufferMember {
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GlobalVariable *GV;
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size_t Offset;
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CBufferMember(GlobalVariable *GV, size_t Offset) : GV(GV), Offset(Offset) {}
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};
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struct CBufferMapping {
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GlobalVariable *Handle;
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SmallVector<CBufferMember> Members;
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CBufferMapping(GlobalVariable *Handle) : Handle(Handle) {}
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};
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class CBufferMetadata {
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NamedMDNode *MD;
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SmallVector<CBufferMapping> Mappings;
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CBufferMetadata(NamedMDNode *MD) : MD(MD) {}
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public:
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LLVM_ABI static std::optional<CBufferMetadata>
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get(Module &M, llvm::function_ref<bool(Type *)> IsPadding);
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using iterator = SmallVector<CBufferMapping>::iterator;
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iterator begin() { return Mappings.begin(); }
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iterator end() { return Mappings.end(); }
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LLVM_ABI void eraseFromModule();
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};
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} // namespace hlsl
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} // namespace llvm
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#endif // LLVM_FRONTEND_HLSL_CBUFFER_H
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