1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
//===- DirectX.cpp---------------------------------------------------------===//
//
// 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 "ABIInfoImpl.h"
#include "TargetInfo.h"
#include "llvm/IR/DerivedTypes.h"
using namespace clang;
using namespace clang::CodeGen;
//===----------------------------------------------------------------------===//
// Target codegen info implementation for DirectX.
//===----------------------------------------------------------------------===//
namespace {
class DirectXTargetCodeGenInfo : public TargetCodeGenInfo {
public:
DirectXTargetCodeGenInfo(CodeGen::CodeGenTypes &CGT)
: TargetCodeGenInfo(std::make_unique<DefaultABIInfo>(CGT)) {}
llvm::Type *getHLSLType(CodeGenModule &CGM, const Type *T) const override;
};
llvm::Type *DirectXTargetCodeGenInfo::getHLSLType(CodeGenModule &CGM,
const Type *Ty) const {
auto *ResType = dyn_cast<HLSLAttributedResourceType>(Ty);
if (!ResType)
return nullptr;
llvm::LLVMContext &Ctx = CGM.getLLVMContext();
const HLSLAttributedResourceType::Attributes &ResAttrs = ResType->getAttrs();
switch (ResAttrs.ResourceClass) {
case llvm::dxil::ResourceClass::UAV:
case llvm::dxil::ResourceClass::SRV: {
// TypedBuffer and RawBuffer both need element type
QualType ContainedTy = ResType->getContainedType();
if (ContainedTy.isNull())
return nullptr;
// convert element type
llvm::Type *ElemType = CGM.getTypes().ConvertType(ContainedTy);
llvm::StringRef TypeName =
ResAttrs.RawBuffer ? "dx.RawBuffer" : "dx.TypedBuffer";
SmallVector<unsigned, 3> Ints = {/*IsWriteable*/ ResAttrs.ResourceClass ==
llvm::dxil::ResourceClass::UAV,
/*IsROV*/ ResAttrs.IsROV};
if (!ResAttrs.RawBuffer)
Ints.push_back(/*IsSigned*/ ContainedTy->isSignedIntegerType());
return llvm::TargetExtType::get(Ctx, TypeName, {ElemType}, Ints);
}
case llvm::dxil::ResourceClass::CBuffer:
llvm_unreachable("dx.CBuffer handles are not implemented yet");
break;
case llvm::dxil::ResourceClass::Sampler:
llvm_unreachable("dx.Sampler handles are not implemented yet");
break;
}
llvm_unreachable("Unknown llvm::dxil::ResourceClass enum");
}
} // namespace
std::unique_ptr<TargetCodeGenInfo>
CodeGen::createDirectXTargetCodeGenInfo(CodeGenModule &CGM) {
return std::make_unique<DirectXTargetCodeGenInfo>(CGM.getTypes());
}
|
