[NFC] Refactoring MCDXBC to support out of order storage of root parameters #137284
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You can test this locally with the following command:git-clang-format --diff HEAD~1 HEAD --extensions h,cpp -- llvm/include/llvm/MC/DXContainerRootSignature.h llvm/lib/MC/DXContainerRootSignature.cpp llvm/lib/ObjectYAML/DXContainerEmitter.cpp llvm/lib/Target/DirectX/DXILRootSignature.cppView the diff from clang-format here.diff --git a/llvm/lib/ObjectYAML/DXContainerEmitter.cpp b/llvm/lib/ObjectYAML/DXContainerEmitter.cpp
index b8ea1b048..a4b8f1d37 100644
--- a/llvm/lib/ObjectYAML/DXContainerEmitter.cpp
+++ b/llvm/lib/ObjectYAML/DXContainerEmitter.cpp
@@ -298,7 +298,7 @@ void DXContainerWriter::writeParts(raw_ostream &OS) {
Descriptor.RegisterSpace = Param.Descriptor.RegisterSpace;
Descriptor.ShaderRegister = Param.Descriptor.ShaderRegister;
Descriptor.Flags = Param.Descriptor.getEncodedFlags();
- RS.ParametersContainer.addParameter(Header, Descriptor);
+ RS.ParametersContainer.addParameter(Header, Descriptor);
}
break;
default:
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@llvm/pr-subscribers-llvm-binary-utilities @llvm/pr-subscribers-backend-directx Author: None (joaosaffran) ChangesFull diff: https://github.com/llvm/llvm-project/pull/137284.diff 4 Files Affected:
diff --git a/llvm/include/llvm/MC/DXContainerRootSignature.h b/llvm/include/llvm/MC/DXContainerRootSignature.h
index 44e26c81eedc1..c8af613a57094 100644
--- a/llvm/include/llvm/MC/DXContainerRootSignature.h
+++ b/llvm/include/llvm/MC/DXContainerRootSignature.h
@@ -6,21 +6,87 @@
//
//===----------------------------------------------------------------------===//
+#include "llvm/ADT/STLForwardCompat.h"
#include "llvm/BinaryFormat/DXContainer.h"
+#include <cstddef>
#include <cstdint>
-#include <limits>
+#include <optional>
+#include <utility>
+#include <variant>
namespace llvm {
class raw_ostream;
namespace mcdxbc {
-struct RootParameter {
+struct RootParameterInfo {
dxbc::RootParameterHeader Header;
- union {
- dxbc::RootConstants Constants;
- dxbc::RST0::v1::RootDescriptor Descriptor;
- };
+ size_t Location;
+
+ RootParameterInfo() = default;
+
+ RootParameterInfo(dxbc::RootParameterHeader H, size_t L)
+ : Header(H), Location(L) {}
+};
+
+using RootDescriptor = std::variant<dxbc::RST0::v0::RootDescriptor,
+ dxbc::RST0::v1::RootDescriptor>;
+using ParametersView = std::variant<const dxbc::RootConstants *,
+ const dxbc::RST0::v0::RootDescriptor *,
+ const dxbc::RST0::v1::RootDescriptor *>;
+struct RootParametersContainer {
+ SmallVector<RootParameterInfo> ParametersInfo;
+
+ SmallVector<dxbc::RootConstants> Constants;
+ SmallVector<RootDescriptor> Descriptors;
+
+ void addInfo(dxbc::RootParameterHeader H, size_t L) {
+ ParametersInfo.push_back(RootParameterInfo(H, L));
+ }
+
+ void addParameter(dxbc::RootParameterHeader H, dxbc::RootConstants C) {
+ addInfo(H, Constants.size());
+ Constants.push_back(C);
+ }
+
+ void addParameter(dxbc::RootParameterHeader H,
+ dxbc::RST0::v0::RootDescriptor D) {
+ addInfo(H, Descriptors.size());
+ Descriptors.push_back(D);
+ }
+
+ void addParameter(dxbc::RootParameterHeader H,
+ dxbc::RST0::v1::RootDescriptor D) {
+ addInfo(H, Descriptors.size());
+ Descriptors.push_back(D);
+ }
+
+ std::optional<ParametersView> getParameter(const RootParameterInfo *H) const {
+ switch (H->Header.ParameterType) {
+ case llvm::to_underlying(dxbc::RootParameterType::Constants32Bit):
+ return &Constants[H->Location];
+ case llvm::to_underlying(dxbc::RootParameterType::CBV):
+ case llvm::to_underlying(dxbc::RootParameterType::SRV):
+ case llvm::to_underlying(dxbc::RootParameterType::UAV):
+ const RootDescriptor &VersionedParam = Descriptors[H->Location];
+ if (std::holds_alternative<dxbc::RST0::v0::RootDescriptor>(
+ VersionedParam)) {
+ return &std::get<dxbc::RST0::v0::RootDescriptor>(VersionedParam);
+ }
+ return &std::get<dxbc::RST0::v1::RootDescriptor>(VersionedParam);
+ }
+
+ return std::nullopt;
+ }
+
+ size_t size() const { return ParametersInfo.size(); }
+
+ SmallVector<RootParameterInfo>::const_iterator begin() const {
+ return ParametersInfo.begin();
+ }
+ SmallVector<RootParameterInfo>::const_iterator end() const {
+ return ParametersInfo.end();
+ }
};
struct RootSignatureDesc {
@@ -29,7 +95,7 @@ struct RootSignatureDesc {
uint32_t RootParameterOffset = 0U;
uint32_t StaticSamplersOffset = 0u;
uint32_t NumStaticSamplers = 0u;
- SmallVector<mcdxbc::RootParameter> Parameters;
+ mcdxbc::RootParametersContainer ParametersContainer;
void write(raw_ostream &OS) const;
diff --git a/llvm/lib/MC/DXContainerRootSignature.cpp b/llvm/lib/MC/DXContainerRootSignature.cpp
index 2693cb9943d5e..641c2f5fa1b1b 100644
--- a/llvm/lib/MC/DXContainerRootSignature.cpp
+++ b/llvm/lib/MC/DXContainerRootSignature.cpp
@@ -8,7 +8,9 @@
#include "llvm/MC/DXContainerRootSignature.h"
#include "llvm/ADT/SmallString.h"
+#include "llvm/BinaryFormat/DXContainer.h"
#include "llvm/Support/EndianStream.h"
+#include <variant>
using namespace llvm;
using namespace llvm::mcdxbc;
@@ -30,24 +32,20 @@ static void rewriteOffsetToCurrentByte(raw_svector_ostream &Stream,
size_t RootSignatureDesc::getSize() const {
size_t Size = sizeof(dxbc::RootSignatureHeader) +
- Parameters.size() * sizeof(dxbc::RootParameterHeader);
+ ParametersContainer.size() * sizeof(dxbc::RootParameterHeader);
- for (const mcdxbc::RootParameter &P : Parameters) {
- switch (P.Header.ParameterType) {
- case llvm::to_underlying(dxbc::RootParameterType::Constants32Bit):
- Size += sizeof(dxbc::RootConstants);
- break;
- case llvm::to_underlying(dxbc::RootParameterType::CBV):
- case llvm::to_underlying(dxbc::RootParameterType::SRV):
- case llvm::to_underlying(dxbc::RootParameterType::UAV):
- if (Version == 1)
- Size += sizeof(dxbc::RST0::v0::RootDescriptor);
- else
- Size += sizeof(dxbc::RST0::v1::RootDescriptor);
-
- break;
- }
+ for (const auto &I : ParametersContainer) {
+ std::optional<ParametersView> P = ParametersContainer.getParameter(&I);
+ if (!P)
+ continue;
+ std::visit(
+ [&Size](auto &Value) -> void {
+ using T = std::decay_t<decltype(*Value)>;
+ Size += sizeof(T);
+ },
+ *P);
}
+
return Size;
}
@@ -56,7 +54,7 @@ void RootSignatureDesc::write(raw_ostream &OS) const {
raw_svector_ostream BOS(Storage);
BOS.reserveExtraSpace(getSize());
- const uint32_t NumParameters = Parameters.size();
+ const uint32_t NumParameters = ParametersContainer.size();
support::endian::write(BOS, Version, llvm::endianness::little);
support::endian::write(BOS, NumParameters, llvm::endianness::little);
@@ -66,7 +64,7 @@ void RootSignatureDesc::write(raw_ostream &OS) const {
support::endian::write(BOS, Flags, llvm::endianness::little);
SmallVector<uint32_t> ParamsOffsets;
- for (const mcdxbc::RootParameter &P : Parameters) {
+ for (const auto &P : ParametersContainer) {
support::endian::write(BOS, P.Header.ParameterType,
llvm::endianness::little);
support::endian::write(BOS, P.Header.ShaderVisibility,
@@ -76,29 +74,38 @@ void RootSignatureDesc::write(raw_ostream &OS) const {
}
assert(NumParameters == ParamsOffsets.size());
- for (size_t I = 0; I < NumParameters; ++I) {
+ const RootParameterInfo *H = ParametersContainer.begin();
+ for (size_t I = 0; I < NumParameters; ++I, H++) {
rewriteOffsetToCurrentByte(BOS, ParamsOffsets[I]);
- const mcdxbc::RootParameter &P = Parameters[I];
-
- switch (P.Header.ParameterType) {
- case llvm::to_underlying(dxbc::RootParameterType::Constants32Bit):
- support::endian::write(BOS, P.Constants.ShaderRegister,
+ auto P = ParametersContainer.getParameter(H);
+ if (!P)
+ continue;
+ if (std::holds_alternative<const dxbc::RootConstants *>(P.value())) {
+ auto *Constants = std::get<const dxbc::RootConstants *>(P.value());
+ support::endian::write(BOS, Constants->ShaderRegister,
llvm::endianness::little);
- support::endian::write(BOS, P.Constants.RegisterSpace,
+ support::endian::write(BOS, Constants->RegisterSpace,
llvm::endianness::little);
- support::endian::write(BOS, P.Constants.Num32BitValues,
+ support::endian::write(BOS, Constants->Num32BitValues,
llvm::endianness::little);
- break;
- case llvm::to_underlying(dxbc::RootParameterType::CBV):
- case llvm::to_underlying(dxbc::RootParameterType::SRV):
- case llvm::to_underlying(dxbc::RootParameterType::UAV):
- support::endian::write(BOS, P.Descriptor.ShaderRegister,
+ } else if (std::holds_alternative<const dxbc::RST0::v0::RootDescriptor *>(
+ *P)) {
+ auto *Descriptor =
+ std::get<const dxbc::RST0::v0::RootDescriptor *>(P.value());
+ support::endian::write(BOS, Descriptor->ShaderRegister,
+ llvm::endianness::little);
+ support::endian::write(BOS, Descriptor->RegisterSpace,
+ llvm::endianness::little);
+ } else if (std::holds_alternative<const dxbc::RST0::v1::RootDescriptor *>(
+ *P)) {
+ auto *Descriptor =
+ std::get<const dxbc::RST0::v1::RootDescriptor *>(P.value());
+
+ support::endian::write(BOS, Descriptor->ShaderRegister,
llvm::endianness::little);
- support::endian::write(BOS, P.Descriptor.RegisterSpace,
+ support::endian::write(BOS, Descriptor->RegisterSpace,
llvm::endianness::little);
- if (Version > 1)
- support::endian::write(BOS, P.Descriptor.Flags,
- llvm::endianness::little);
+ support::endian::write(BOS, Descriptor->Flags, llvm::endianness::little);
}
}
assert(Storage.size() == getSize());
diff --git a/llvm/lib/ObjectYAML/DXContainerEmitter.cpp b/llvm/lib/ObjectYAML/DXContainerEmitter.cpp
index 239ee9e3de9b1..b8ea1b048edfe 100644
--- a/llvm/lib/ObjectYAML/DXContainerEmitter.cpp
+++ b/llvm/lib/ObjectYAML/DXContainerEmitter.cpp
@@ -274,27 +274,37 @@ void DXContainerWriter::writeParts(raw_ostream &OS) {
RS.StaticSamplersOffset = P.RootSignature->StaticSamplersOffset;
for (const auto &Param : P.RootSignature->Parameters) {
- mcdxbc::RootParameter NewParam;
- NewParam.Header = dxbc::RootParameterHeader{
- Param.Type, Param.Visibility, Param.Offset};
+ auto Header = dxbc::RootParameterHeader{Param.Type, Param.Visibility,
+ Param.Offset};
switch (Param.Type) {
case llvm::to_underlying(dxbc::RootParameterType::Constants32Bit):
- NewParam.Constants.Num32BitValues = Param.Constants.Num32BitValues;
- NewParam.Constants.RegisterSpace = Param.Constants.RegisterSpace;
- NewParam.Constants.ShaderRegister = Param.Constants.ShaderRegister;
+ dxbc::RootConstants Constants;
+ Constants.Num32BitValues = Param.Constants.Num32BitValues;
+ Constants.RegisterSpace = Param.Constants.RegisterSpace;
+ Constants.ShaderRegister = Param.Constants.ShaderRegister;
+ RS.ParametersContainer.addParameter(Header, Constants);
break;
case llvm::to_underlying(dxbc::RootParameterType::SRV):
case llvm::to_underlying(dxbc::RootParameterType::UAV):
case llvm::to_underlying(dxbc::RootParameterType::CBV):
- NewParam.Descriptor.RegisterSpace = Param.Descriptor.RegisterSpace;
- NewParam.Descriptor.ShaderRegister = Param.Descriptor.ShaderRegister;
- if (P.RootSignature->Version > 1)
- NewParam.Descriptor.Flags = Param.Descriptor.getEncodedFlags();
+ if (RS.Version == 1) {
+ dxbc::RST0::v0::RootDescriptor Descriptor;
+ Descriptor.RegisterSpace = Param.Descriptor.RegisterSpace;
+ Descriptor.ShaderRegister = Param.Descriptor.ShaderRegister;
+ RS.ParametersContainer.addParameter(Header, Descriptor);
+ } else {
+ dxbc::RST0::v1::RootDescriptor Descriptor;
+ Descriptor.RegisterSpace = Param.Descriptor.RegisterSpace;
+ Descriptor.ShaderRegister = Param.Descriptor.ShaderRegister;
+ Descriptor.Flags = Param.Descriptor.getEncodedFlags();
+ RS.ParametersContainer.addParameter(Header, Descriptor);
+ }
break;
+ default:
+ // Handling invalid parameter type edge case
+ RS.ParametersContainer.addInfo(Header, -1);
}
-
- RS.Parameters.push_back(NewParam);
}
RS.write(OS);
diff --git a/llvm/lib/Target/DirectX/DXILRootSignature.cpp b/llvm/lib/Target/DirectX/DXILRootSignature.cpp
index ef299c17baf76..30ca4d8f7c8ed 100644
--- a/llvm/lib/Target/DirectX/DXILRootSignature.cpp
+++ b/llvm/lib/Target/DirectX/DXILRootSignature.cpp
@@ -30,6 +30,7 @@
#include <cstdint>
#include <optional>
#include <utility>
+#include <variant>
using namespace llvm;
using namespace llvm::dxil;
@@ -75,31 +76,32 @@ static bool parseRootConstants(LLVMContext *Ctx, mcdxbc::RootSignatureDesc &RSD,
if (RootConstantNode->getNumOperands() != 5)
return reportError(Ctx, "Invalid format for RootConstants Element");
- mcdxbc::RootParameter NewParameter;
- NewParameter.Header.ParameterType =
+ dxbc::RootParameterHeader Header;
+ Header.ParameterType =
llvm::to_underlying(dxbc::RootParameterType::Constants32Bit);
if (std::optional<uint32_t> Val = extractMdIntValue(RootConstantNode, 1))
- NewParameter.Header.ShaderVisibility = *Val;
+ Header.ShaderVisibility = *Val;
else
return reportError(Ctx, "Invalid value for ShaderVisibility");
+ dxbc::RootConstants Constants;
if (std::optional<uint32_t> Val = extractMdIntValue(RootConstantNode, 2))
- NewParameter.Constants.ShaderRegister = *Val;
+ Constants.ShaderRegister = *Val;
else
return reportError(Ctx, "Invalid value for ShaderRegister");
if (std::optional<uint32_t> Val = extractMdIntValue(RootConstantNode, 3))
- NewParameter.Constants.RegisterSpace = *Val;
+ Constants.RegisterSpace = *Val;
else
return reportError(Ctx, "Invalid value for RegisterSpace");
if (std::optional<uint32_t> Val = extractMdIntValue(RootConstantNode, 4))
- NewParameter.Constants.Num32BitValues = *Val;
+ Constants.Num32BitValues = *Val;
else
return reportError(Ctx, "Invalid value for Num32BitValues");
- RSD.Parameters.push_back(NewParameter);
+ RSD.ParametersContainer.addParameter(Header, Constants);
return false;
}
@@ -164,12 +166,12 @@ static bool validate(LLVMContext *Ctx, const mcdxbc::RootSignatureDesc &RSD) {
return reportValueError(Ctx, "RootFlags", RSD.Flags);
}
- for (const mcdxbc::RootParameter &P : RSD.Parameters) {
- if (!dxbc::isValidShaderVisibility(P.Header.ShaderVisibility))
+ for (const llvm::mcdxbc::RootParameterInfo &Info : RSD.ParametersContainer) {
+ if (!dxbc::isValidShaderVisibility(Info.Header.ShaderVisibility))
return reportValueError(Ctx, "ShaderVisibility",
- P.Header.ShaderVisibility);
+ Info.Header.ShaderVisibility);
- assert(dxbc::isValidParameterType(P.Header.ParameterType) &&
+ assert(dxbc::isValidParameterType(Info.Header.ParameterType) &&
"Invalid value for ParameterType");
}
@@ -287,22 +289,26 @@ PreservedAnalyses RootSignatureAnalysisPrinter::run(Module &M,
OS << indent(Space) << "Version: " << RS.Version << "\n";
OS << indent(Space) << "RootParametersOffset: " << RS.RootParameterOffset
<< "\n";
- OS << indent(Space) << "NumParameters: " << RS.Parameters.size() << "\n";
+ OS << indent(Space) << "NumParameters: " << RS.ParametersContainer.size()
+ << "\n";
Space++;
- for (auto const &P : RS.Parameters) {
- OS << indent(Space) << "- Parameter Type: " << P.Header.ParameterType
+ for (auto const &Info : RS.ParametersContainer) {
+ OS << indent(Space) << "- Parameter Type: " << Info.Header.ParameterType
<< "\n";
OS << indent(Space + 2)
- << "Shader Visibility: " << P.Header.ShaderVisibility << "\n";
- switch (P.Header.ParameterType) {
- case llvm::to_underlying(dxbc::RootParameterType::Constants32Bit):
+ << "Shader Visibility: " << Info.Header.ShaderVisibility << "\n";
+ std::optional<mcdxbc::ParametersView> P =
+ RS.ParametersContainer.getParameter(&Info);
+ if (!P)
+ continue;
+ if (std::holds_alternative<const dxbc::RootConstants *>(*P)) {
+ auto *Constants = std::get<const dxbc::RootConstants *>(*P);
OS << indent(Space + 2)
- << "Register Space: " << P.Constants.RegisterSpace << "\n";
+ << "Register Space: " << Constants->RegisterSpace << "\n";
OS << indent(Space + 2)
- << "Shader Register: " << P.Constants.ShaderRegister << "\n";
+ << "Shader Register: " << Constants->ShaderRegister << "\n";
OS << indent(Space + 2)
- << "Num 32 Bit Values: " << P.Constants.Num32BitValues << "\n";
- break;
+ << "Num 32 Bit Values: " << Constants->Num32BitValues << "\n";
}
}
Space--;
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This PR refactors mcdxbc data structure for root signatures to support out of order storage of in memory root signature data.