https://github.com/joaosaffran updated 
https://github.com/llvm/llvm-project/pull/136732

>From 156975528eefad5be199165fcfce6398f6a79ab8 Mon Sep 17 00:00:00 2001
From: joaosaffran <joao.saff...@microsoft.com>
Date: Fri, 18 Apr 2025 00:41:37 +0000
Subject: [PATCH 1/4] adding support for root descriptor

---
 llvm/include/llvm/BinaryFormat/DXContainer.h  | 25 ++++++++
 .../BinaryFormat/DXContainerConstants.def     | 15 +++++
 .../llvm/MC/DXContainerRootSignature.h        |  2 +
 llvm/include/llvm/Object/DXContainer.h        | 39 ++++++++++++
 .../include/llvm/ObjectYAML/DXContainerYAML.h | 36 ++++++++++-
 llvm/lib/MC/DXContainerRootSignature.cpp      | 26 ++++++++
 llvm/lib/ObjectYAML/DXContainerEmitter.cpp    | 19 +++++-
 llvm/lib/ObjectYAML/DXContainerYAML.cpp       | 63 +++++++++++++++++--
 .../RootSignature-MultipleParameters.yaml     | 20 ++++--
 9 files changed, 233 insertions(+), 12 deletions(-)

diff --git a/llvm/include/llvm/BinaryFormat/DXContainer.h 
b/llvm/include/llvm/BinaryFormat/DXContainer.h
index 455657980bf40..d6e585c94fed1 100644
--- a/llvm/include/llvm/BinaryFormat/DXContainer.h
+++ b/llvm/include/llvm/BinaryFormat/DXContainer.h
@@ -18,6 +18,7 @@
 #include "llvm/Support/SwapByteOrder.h"
 #include "llvm/TargetParser/Triple.h"
 
+#include <cstdint>
 #include <stdint.h>
 
 namespace llvm {
@@ -158,6 +159,11 @@ enum class RootElementFlag : uint32_t {
 #include "DXContainerConstants.def"
 };
 
+#define ROOT_DESCRIPTOR_FLAG(Num, Val) Val = 1ull << Num,
+enum class RootDescriptorFlag : uint32_t {
+#include "DXContainerConstants.def"
+};
+
 #define ROOT_PARAMETER(Val, Enum) Enum = Val,
 enum class RootParameterType : uint32_t {
 #include "DXContainerConstants.def"
@@ -594,6 +600,25 @@ struct RootConstants {
     sys::swapByteOrder(Num32BitValues);
   }
 };
+struct RootDescriptor_V1_0 {
+  uint32_t ShaderRegister;
+  uint32_t RegisterSpace;
+  void swapBytes() {
+    sys::swapByteOrder(ShaderRegister);
+    sys::swapByteOrder(RegisterSpace);
+  }
+};
+
+struct RootDescriptor_V1_1 {
+  uint32_t ShaderRegister;
+  uint32_t RegisterSpace;
+  uint32_t Flags;
+  void swapBytes() {
+    sys::swapByteOrder(ShaderRegister);
+    sys::swapByteOrder(RegisterSpace);
+    sys::swapByteOrder(Flags);
+  }
+};
 
 struct RootParameterHeader {
   uint32_t ParameterType;
diff --git a/llvm/include/llvm/BinaryFormat/DXContainerConstants.def 
b/llvm/include/llvm/BinaryFormat/DXContainerConstants.def
index 590ded5e8c899..6840901460ced 100644
--- a/llvm/include/llvm/BinaryFormat/DXContainerConstants.def
+++ b/llvm/include/llvm/BinaryFormat/DXContainerConstants.def
@@ -72,9 +72,24 @@ ROOT_ELEMENT_FLAG(11, SamplerHeapDirectlyIndexed)
 #undef ROOT_ELEMENT_FLAG
 #endif // ROOT_ELEMENT_FLAG
 
+ 
+// ROOT_ELEMENT_FLAG(bit offset for the flag, name).
+#ifdef ROOT_DESCRIPTOR_FLAG
+
+ROOT_DESCRIPTOR_FLAG(0, NONE)
+ROOT_DESCRIPTOR_FLAG(2, DATA_VOLATILE)
+ROOT_DESCRIPTOR_FLAG(4, DATA_STATIC_WHILE_SET_AT_EXECUTE)
+ROOT_DESCRIPTOR_FLAG(8, DATA_STATIC)
+#undef ROOT_DESCRIPTOR_FLAG
+#endif // ROOT_DESCRIPTOR_FLAG
+
+
 #ifdef ROOT_PARAMETER
 
 ROOT_PARAMETER(1, Constants32Bit)
+ROOT_PARAMETER(2, CBV)
+ROOT_PARAMETER(3, SRV)
+ROOT_PARAMETER(4, UAV)
 #undef ROOT_PARAMETER
 #endif // ROOT_PARAMETER
 
diff --git a/llvm/include/llvm/MC/DXContainerRootSignature.h 
b/llvm/include/llvm/MC/DXContainerRootSignature.h
index 6d3329a2c6ce9..5e3bc9b873f82 100644
--- a/llvm/include/llvm/MC/DXContainerRootSignature.h
+++ b/llvm/include/llvm/MC/DXContainerRootSignature.h
@@ -19,6 +19,8 @@ struct RootParameter {
   dxbc::RootParameterHeader Header;
   union {
     dxbc::RootConstants Constants;
+    dxbc::RootDescriptor_V1_0 Descriptor_V10;
+    dxbc::RootDescriptor_V1_1 Descriptor_V11;
   };
 };
 struct RootSignatureDesc {
diff --git a/llvm/include/llvm/Object/DXContainer.h 
b/llvm/include/llvm/Object/DXContainer.h
index e8287ce078365..7812906700fe3 100644
--- a/llvm/include/llvm/Object/DXContainer.h
+++ b/llvm/include/llvm/Object/DXContainer.h
@@ -15,6 +15,7 @@
 #ifndef LLVM_OBJECT_DXCONTAINER_H
 #define LLVM_OBJECT_DXCONTAINER_H
 
+#include "llvm/ADT/STLForwardCompat.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/BinaryFormat/DXContainer.h"
@@ -149,6 +150,36 @@ struct RootConstantView : RootParameterView {
   }
 };
 
+struct RootDescriptorView_V1_0 : RootParameterView {
+  static bool classof(const RootParameterView *V) {
+    return (V->Header.ParameterType ==
+                llvm::to_underlying(dxbc::RootParameterType::CBV) ||
+            V->Header.ParameterType ==
+                llvm::to_underlying(dxbc::RootParameterType::SRV) ||
+            V->Header.ParameterType ==
+                llvm::to_underlying(dxbc::RootParameterType::UAV));
+  }
+
+  llvm::Expected<dxbc::RootDescriptor_V1_0> read() {
+    return readParameter<dxbc::RootDescriptor_V1_0>();
+  }
+};
+
+struct RootDescriptorView_V1_1 : RootParameterView {
+  static bool classof(const RootParameterView *V) {
+    return (V->Header.ParameterType ==
+                llvm::to_underlying(dxbc::RootParameterType::CBV) ||
+            V->Header.ParameterType ==
+                llvm::to_underlying(dxbc::RootParameterType::SRV) ||
+            V->Header.ParameterType ==
+                llvm::to_underlying(dxbc::RootParameterType::UAV));
+  }
+
+  llvm::Expected<dxbc::RootDescriptor_V1_1> read() {
+    return readParameter<dxbc::RootDescriptor_V1_1>();
+  }
+};
+
 static Error parseFailed(const Twine &Msg) {
   return make_error<GenericBinaryError>(Msg.str(), object_error::parse_failed);
 }
@@ -192,6 +223,14 @@ class RootSignature {
     case dxbc::RootParameterType::Constants32Bit:
       DataSize = sizeof(dxbc::RootConstants);
       break;
+    case dxbc::RootParameterType::CBV:
+    case dxbc::RootParameterType::SRV:
+    case dxbc::RootParameterType::UAV:
+      if (Version == 1)
+        DataSize = sizeof(dxbc::RootDescriptor_V1_0);
+      else
+        DataSize = sizeof(dxbc::RootDescriptor_V1_1);
+      break;
     }
     size_t EndOfSectionByte = getNumStaticSamplers() == 0
                                   ? PartData.size()
diff --git a/llvm/include/llvm/ObjectYAML/DXContainerYAML.h 
b/llvm/include/llvm/ObjectYAML/DXContainerYAML.h
index 393bba9c79bf8..2026a2c08d472 100644
--- a/llvm/include/llvm/ObjectYAML/DXContainerYAML.h
+++ b/llvm/include/llvm/ObjectYAML/DXContainerYAML.h
@@ -15,6 +15,7 @@
 #ifndef LLVM_OBJECTYAML_DXCONTAINERYAML_H
 #define LLVM_OBJECTYAML_DXCONTAINERYAML_H
 
+#include "llvm/ADT/STLForwardCompat.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/BinaryFormat/DXContainer.h"
 #include "llvm/Object/DXContainer.h"
@@ -24,6 +25,7 @@
 #include <cstdint>
 #include <optional>
 #include <string>
+#include <variant>
 #include <vector>
 
 namespace llvm {
@@ -73,24 +75,50 @@ struct ShaderHash {
   std::vector<llvm::yaml::Hex8> Digest;
 };
 
-#define ROOT_ELEMENT_FLAG(Num, Val) bool Val = false;
-
 struct RootConstantsYaml {
   uint32_t ShaderRegister;
   uint32_t RegisterSpace;
   uint32_t Num32BitValues;
 };
 
+#define ROOT_DESCRIPTOR_FLAG(Num, Val) bool Val = false;
+struct RootDescriptorYaml {
+  RootDescriptorYaml() = default;
+
+  uint32_t ShaderRegister;
+  uint32_t RegisterSpace;
+
+  uint32_t getEncodedFlags();
+
+#include "llvm/BinaryFormat/DXContainerConstants.def"
+};
+
 struct RootParameterYamlDesc {
   uint32_t Type;
   uint32_t Visibility;
   uint32_t Offset;
+  RootParameterYamlDesc(){};
+  RootParameterYamlDesc(uint32_t T) : Type(T) {
+    switch (T) {
+
+    case llvm::to_underlying(dxbc::RootParameterType::Constants32Bit):
+      Constants = RootConstantsYaml();
+      break;
+    case llvm::to_underlying(dxbc::RootParameterType::CBV):
+    case llvm::to_underlying(dxbc::RootParameterType::SRV):
+    case llvm::to_underlying(dxbc::RootParameterType::UAV):
+      Descriptor = RootDescriptorYaml();
+      break;
+    }
+  }
 
   union {
     RootConstantsYaml Constants;
+    RootDescriptorYaml Descriptor;
   };
 };
 
+#define ROOT_ELEMENT_FLAG(Num, Val) bool Val = false;
 struct RootSignatureYamlDesc {
   RootSignatureYamlDesc() = default;
 
@@ -298,6 +326,10 @@ template <> struct 
MappingTraits<llvm::DXContainerYAML::RootConstantsYaml> {
   static void mapping(IO &IO, llvm::DXContainerYAML::RootConstantsYaml &C);
 };
 
+template <> struct MappingTraits<llvm::DXContainerYAML::RootDescriptorYaml> {
+  static void mapping(IO &IO, llvm::DXContainerYAML::RootDescriptorYaml &D);
+};
+
 } // namespace yaml
 
 } // namespace llvm
diff --git a/llvm/lib/MC/DXContainerRootSignature.cpp 
b/llvm/lib/MC/DXContainerRootSignature.cpp
index c2731d95c955e..f3f5a6993bf38 100644
--- a/llvm/lib/MC/DXContainerRootSignature.cpp
+++ b/llvm/lib/MC/DXContainerRootSignature.cpp
@@ -8,6 +8,7 @@
 
 #include "llvm/MC/DXContainerRootSignature.h"
 #include "llvm/ADT/SmallString.h"
+#include "llvm/BinaryFormat/DXContainer.h"
 #include "llvm/Support/EndianStream.h"
 
 using namespace llvm;
@@ -37,6 +38,15 @@ size_t RootSignatureDesc::getSize() const {
     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::RootDescriptor_V1_0);
+      else
+        Size += sizeof(dxbc::RootDescriptor_V1_1);
+
+      break;
     }
   }
   return Size;
@@ -80,6 +90,22 @@ void RootSignatureDesc::write(raw_ostream &OS) const {
       support::endian::write(BOS, P.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):
+      if (Version == 1) {
+        support::endian::write(BOS, P.Descriptor_V10.RegisterSpace,
+                               llvm::endianness::little);
+        support::endian::write(BOS, P.Descriptor_V10.ShaderRegister,
+                               llvm::endianness::little);
+      } else {
+        support::endian::write(BOS, P.Descriptor_V11.RegisterSpace,
+                               llvm::endianness::little);
+        support::endian::write(BOS, P.Descriptor_V11.ShaderRegister,
+                               llvm::endianness::little);
+        support::endian::write(BOS, P.Descriptor_V11.Flags,
+                               llvm::endianness::little);
+      }
     }
   }
   assert(Storage.size() == getSize());
diff --git a/llvm/lib/ObjectYAML/DXContainerEmitter.cpp 
b/llvm/lib/ObjectYAML/DXContainerEmitter.cpp
index 86e24eae4abc6..a931084e50d34 100644
--- a/llvm/lib/ObjectYAML/DXContainerEmitter.cpp
+++ b/llvm/lib/ObjectYAML/DXContainerEmitter.cpp
@@ -273,7 +273,7 @@ void DXContainerWriter::writeParts(raw_ostream &OS) {
       RS.NumStaticSamplers = P.RootSignature->NumStaticSamplers;
       RS.StaticSamplersOffset = P.RootSignature->StaticSamplersOffset;
 
-      for (const auto &Param : P.RootSignature->Parameters) {
+      for (auto &Param : P.RootSignature->Parameters) {
         mcdxbc::RootParameter NewParam;
         NewParam.Header = dxbc::RootParameterHeader{
             Param.Type, Param.Visibility, Param.Offset};
@@ -283,6 +283,23 @@ void DXContainerWriter::writeParts(raw_ostream &OS) {
           NewParam.Constants.Num32BitValues = Param.Constants.Num32BitValues;
           NewParam.Constants.RegisterSpace = Param.Constants.RegisterSpace;
           NewParam.Constants.ShaderRegister = Param.Constants.ShaderRegister;
+          break;
+        case llvm::to_underlying(dxbc::RootParameterType::SRV):
+        case llvm::to_underlying(dxbc::RootParameterType::UAV):
+        case llvm::to_underlying(dxbc::RootParameterType::CBV):
+          if (RS.Version == 1) {
+            NewParam.Descriptor_V10.RegisterSpace =
+                Param.Descriptor.RegisterSpace;
+            NewParam.Descriptor_V10.ShaderRegister =
+                Param.Descriptor.ShaderRegister;
+          } else {
+            NewParam.Descriptor_V11.RegisterSpace =
+                Param.Descriptor.RegisterSpace;
+            NewParam.Descriptor_V11.ShaderRegister =
+                Param.Descriptor.ShaderRegister;
+            NewParam.Descriptor_V11.Flags = Param.Descriptor.getEncodedFlags();
+          }
+
           break;
         }
 
diff --git a/llvm/lib/ObjectYAML/DXContainerYAML.cpp 
b/llvm/lib/ObjectYAML/DXContainerYAML.cpp
index 59914fe30082d..af5bc7388ae22 100644
--- a/llvm/lib/ObjectYAML/DXContainerYAML.cpp
+++ b/llvm/lib/ObjectYAML/DXContainerYAML.cpp
@@ -15,6 +15,7 @@
 #include "llvm/ADT/STLForwardCompat.h"
 #include "llvm/ADT/ScopeExit.h"
 #include "llvm/BinaryFormat/DXContainer.h"
+#include "llvm/Object/DXContainer.h"
 #include "llvm/Support/Error.h"
 #include "llvm/Support/ScopedPrinter.h"
 #include <cstdint>
@@ -38,8 +39,9 @@ DXContainerYAML::RootSignatureYamlDesc::create(
     const object::DirectX::RootSignature &Data) {
 
   RootSignatureYamlDesc RootSigDesc;
+  uint32_t V = Data.getVersion();
 
-  RootSigDesc.Version = Data.getVersion();
+  RootSigDesc.Version = V;
   RootSigDesc.NumStaticSamplers = Data.getNumStaticSamplers();
   RootSigDesc.StaticSamplersOffset = Data.getStaticSamplersOffset();
   RootSigDesc.NumRootParameters = Data.getNumRootParameters();
@@ -47,14 +49,12 @@ DXContainerYAML::RootSignatureYamlDesc::create(
 
   uint32_t Flags = Data.getFlags();
   for (const dxbc::RootParameterHeader &PH : Data.param_headers()) {
-
-    RootParameterYamlDesc NewP;
-    NewP.Offset = PH.ParameterOffset;
-
     if (!dxbc::isValidParameterType(PH.ParameterType))
       return createStringError(std::errc::invalid_argument,
                                "Invalid value for parameter type");
 
+    RootParameterYamlDesc NewP(PH.ParameterType);
+    NewP.Offset = PH.ParameterOffset;
     NewP.Type = PH.ParameterType;
 
     if (!dxbc::isValidShaderVisibility(PH.ShaderVisibility))
@@ -80,6 +80,37 @@ DXContainerYAML::RootSignatureYamlDesc::create(
       NewP.Constants.ShaderRegister = Constants.ShaderRegister;
       NewP.Constants.RegisterSpace = Constants.RegisterSpace;
     }
+
+    if (V == 1) {
+      if (auto *RDV =
+              dyn_cast<object::DirectX::RootDescriptorView_V1_0>(&ParamView)) {
+        llvm::Expected<dxbc::RootDescriptor_V1_0> DescriptorOrErr = 
RDV->read();
+        if (Error E = DescriptorOrErr.takeError())
+          return std::move(E);
+        auto Descriptor = *DescriptorOrErr;
+
+        NewP.Descriptor.ShaderRegister = Descriptor.ShaderRegister;
+        NewP.Descriptor.RegisterSpace = Descriptor.RegisterSpace;
+      }
+    }
+
+    if (V == 2) {
+      if (auto *RDV =
+              dyn_cast<object::DirectX::RootDescriptorView_V1_1>(&ParamView)) {
+        llvm::Expected<dxbc::RootDescriptor_V1_1> DescriptorOrErr = 
RDV->read();
+        if (Error E = DescriptorOrErr.takeError())
+          return std::move(E);
+        auto Descriptor = *DescriptorOrErr;
+        NewP.Descriptor.ShaderRegister = Descriptor.ShaderRegister;
+        NewP.Descriptor.RegisterSpace = Descriptor.RegisterSpace;
+#define ROOT_DESCRIPTOR_FLAG(Num, Val)                                         
\
+  NewP.Descriptor.Val =                                                        
\
+      (Descriptor.Flags &                                                      
\
+       llvm::to_underlying(dxbc::RootDescriptorFlag::Val)) > 0;
+#include "llvm/BinaryFormat/DXContainerConstants.def"
+      }
+    }
+
     RootSigDesc.Parameters.push_back(NewP);
   }
 #define ROOT_ELEMENT_FLAG(Num, Val)                                            
\
@@ -89,6 +120,15 @@ DXContainerYAML::RootSignatureYamlDesc::create(
   return RootSigDesc;
 }
 
+uint32_t DXContainerYAML::RootDescriptorYaml::getEncodedFlags() {
+  uint64_t Flag = 0;
+#define ROOT_DESCRIPTOR_FLAG(Num, Val)                                         
\
+  if (Val)                                                                     
\
+    Flag |= (uint32_t)dxbc::RootDescriptorFlag::Val;
+#include "llvm/BinaryFormat/DXContainerConstants.def"
+  return Flag;
+}
+
 uint32_t DXContainerYAML::RootSignatureYamlDesc::getEncodedFlags() {
   uint64_t Flag = 0;
 #define ROOT_ELEMENT_FLAG(Num, Val)                                            
\
@@ -276,6 +316,14 @@ void 
MappingTraits<llvm::DXContainerYAML::RootConstantsYaml>::mapping(
   IO.mapRequired("ShaderRegister", C.ShaderRegister);
 }
 
+void MappingTraits<llvm::DXContainerYAML::RootDescriptorYaml>::mapping(
+    IO &IO, llvm::DXContainerYAML::RootDescriptorYaml &D) {
+  IO.mapRequired("RegisterSpace", D.RegisterSpace);
+  IO.mapRequired("ShaderRegister", D.ShaderRegister);
+#define ROOT_DESCRIPTOR_FLAG(Num, Val) IO.mapOptional(#Val, D.Val, false);
+#include "llvm/BinaryFormat/DXContainerConstants.def"
+}
+
 void MappingTraits<llvm::DXContainerYAML::RootParameterYamlDesc>::mapping(
     IO &IO, llvm::DXContainerYAML::RootParameterYamlDesc &P) {
   IO.mapRequired("ParameterType", P.Type);
@@ -285,6 +333,11 @@ void 
MappingTraits<llvm::DXContainerYAML::RootParameterYamlDesc>::mapping(
   case llvm::to_underlying(dxbc::RootParameterType::Constants32Bit):
     IO.mapRequired("Constants", P.Constants);
     break;
+  case llvm::to_underlying(dxbc::RootParameterType::CBV):
+  case llvm::to_underlying(dxbc::RootParameterType::SRV):
+  case llvm::to_underlying(dxbc::RootParameterType::UAV):
+    IO.mapRequired("Descriptor", P.Descriptor);
+    break;
   }
 }
 
diff --git 
a/llvm/test/ObjectYAML/DXContainer/RootSignature-MultipleParameters.yaml 
b/llvm/test/ObjectYAML/DXContainer/RootSignature-MultipleParameters.yaml
index f366d71714359..ed7d6ed4542ad 100644
--- a/llvm/test/ObjectYAML/DXContainer/RootSignature-MultipleParameters.yaml
+++ b/llvm/test/ObjectYAML/DXContainer/RootSignature-MultipleParameters.yaml
@@ -11,10 +11,10 @@ Header:
   PartOffsets:     [ 60 ]
 Parts:
   - Name:            RTS0
-    Size:            80
+    Size:            96
     RootSignature:
       Version: 2
-      NumRootParameters: 2
+      NumRootParameters: 3
       RootParametersOffset: 24
       NumStaticSamplers: 0
       StaticSamplersOffset: 60
@@ -31,14 +31,20 @@ Parts:
           Num32BitValues: 21
           ShaderRegister: 22
           RegisterSpace: 23     
+      - ParameterType: 2 # SRV
+        ShaderVisibility: 3 # Domain
+        Descriptor:
+          ShaderRegister: 31
+          RegisterSpace: 32
+          DATA_STATIC_WHILE_SET_AT_EXECUTE: true
       AllowInputAssemblerInputLayout: true
       DenyGeometryShaderRootAccess: true
 
 # CHECK:  - Name:            RTS0
-# CHECK-NEXT:    Size:            80
+# CHECK-NEXT:    Size:            96
 # CHECK-NEXT:    RootSignature:
 # CHECK-NEXT:      Version:         2
-# CHECK-NEXT:      NumRootParameters: 2
+# CHECK-NEXT:      NumRootParameters: 3
 # CHECK-NEXT:      RootParametersOffset: 24
 # CHECK-NEXT:      NumStaticSamplers: 0
 # CHECK-NEXT:      StaticSamplersOffset: 60
@@ -55,5 +61,11 @@ Parts:
 # CHECK-NEXT:            Num32BitValues:  21
 # CHECK-NEXT:            RegisterSpace:   23
 # CHECK-NEXT:            ShaderRegister:  22
+# CHECK-NEXT:        - ParameterType:   2
+# CHECK-NEXT:          ShaderVisibility: 3
+# CHECK-NEXT:          Descriptor:
+# CHECK-NEXT:            RegisterSpace:   31
+# CHECK-NEXT:            ShaderRegister:  32
+# CHECK-NEXT:            DATA_STATIC_WHILE_SET_AT_EXECUTE: true
 # CHECK-NEXT:      AllowInputAssemblerInputLayout: true
 # CHECK-NEXT:      DenyGeometryShaderRootAccess: true

>From 999933eab8f5637b53906ebe105f08f11ce84aa0 Mon Sep 17 00:00:00 2001
From: joaosaffran <joao.saff...@microsoft.com>
Date: Fri, 18 Apr 2025 02:36:57 +0000
Subject: [PATCH 2/4] adding test

---
 .../BinaryFormat/DXContainerConstants.def     |   6 +-
 llvm/lib/MC/DXContainerRootSignature.cpp      |   8 +-
 .../RootSignature-Descriptor1.0.yaml          |  46 ++++++++
 .../RootSignature-Descriptor1.1.yaml          |  47 ++++++++
 .../RootSignature-MultipleParameters.yaml     |   4 +-
 llvm/unittests/Object/DXContainerTest.cpp     |  91 ++++++++++++++++
 .../ObjectYAML/DXContainerYAMLTest.cpp        | 103 ++++++++++++++++++
 7 files changed, 296 insertions(+), 9 deletions(-)
 create mode 100644 
llvm/test/ObjectYAML/DXContainer/RootSignature-Descriptor1.0.yaml
 create mode 100644 
llvm/test/ObjectYAML/DXContainer/RootSignature-Descriptor1.1.yaml

diff --git a/llvm/include/llvm/BinaryFormat/DXContainerConstants.def 
b/llvm/include/llvm/BinaryFormat/DXContainerConstants.def
index 6840901460ced..bd9bd760547dc 100644
--- a/llvm/include/llvm/BinaryFormat/DXContainerConstants.def
+++ b/llvm/include/llvm/BinaryFormat/DXContainerConstants.def
@@ -77,9 +77,9 @@ ROOT_ELEMENT_FLAG(11, SamplerHeapDirectlyIndexed)
 #ifdef ROOT_DESCRIPTOR_FLAG
 
 ROOT_DESCRIPTOR_FLAG(0, NONE)
-ROOT_DESCRIPTOR_FLAG(2, DATA_VOLATILE)
-ROOT_DESCRIPTOR_FLAG(4, DATA_STATIC_WHILE_SET_AT_EXECUTE)
-ROOT_DESCRIPTOR_FLAG(8, DATA_STATIC)
+ROOT_DESCRIPTOR_FLAG(1, DATA_VOLATILE)
+ROOT_DESCRIPTOR_FLAG(2, DATA_STATIC_WHILE_SET_AT_EXECUTE)
+ROOT_DESCRIPTOR_FLAG(3, DATA_STATIC)
 #undef ROOT_DESCRIPTOR_FLAG
 #endif // ROOT_DESCRIPTOR_FLAG
 
diff --git a/llvm/lib/MC/DXContainerRootSignature.cpp 
b/llvm/lib/MC/DXContainerRootSignature.cpp
index f3f5a6993bf38..91b158ba22d2c 100644
--- a/llvm/lib/MC/DXContainerRootSignature.cpp
+++ b/llvm/lib/MC/DXContainerRootSignature.cpp
@@ -94,15 +94,15 @@ void RootSignatureDesc::write(raw_ostream &OS) const {
     case llvm::to_underlying(dxbc::RootParameterType::SRV):
     case llvm::to_underlying(dxbc::RootParameterType::UAV):
       if (Version == 1) {
-        support::endian::write(BOS, P.Descriptor_V10.RegisterSpace,
-                               llvm::endianness::little);
         support::endian::write(BOS, P.Descriptor_V10.ShaderRegister,
                                llvm::endianness::little);
-      } else {
-        support::endian::write(BOS, P.Descriptor_V11.RegisterSpace,
+        support::endian::write(BOS, P.Descriptor_V10.RegisterSpace,
                                llvm::endianness::little);
+      } else {
         support::endian::write(BOS, P.Descriptor_V11.ShaderRegister,
                                llvm::endianness::little);
+        support::endian::write(BOS, P.Descriptor_V11.RegisterSpace,
+                               llvm::endianness::little);
         support::endian::write(BOS, P.Descriptor_V11.Flags,
                                llvm::endianness::little);
       }
diff --git a/llvm/test/ObjectYAML/DXContainer/RootSignature-Descriptor1.0.yaml 
b/llvm/test/ObjectYAML/DXContainer/RootSignature-Descriptor1.0.yaml
new file mode 100644
index 0000000000000..e19f3de894c07
--- /dev/null
+++ b/llvm/test/ObjectYAML/DXContainer/RootSignature-Descriptor1.0.yaml
@@ -0,0 +1,46 @@
+# RUN: yaml2obj %s | obj2yaml | FileCheck %s
+
+--- !dxcontainer
+Header:
+  Hash:            [ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 
+                     0x0, 0x0, 0x0, 0x0, 0x0, 0x0 ]
+  Version:
+    Major:           1
+    Minor:           0
+  PartCount:       1
+  PartOffsets:     [ 60 ]
+Parts:
+  - Name:            RTS0
+    Size:            96
+    RootSignature:
+      Version: 1
+      NumRootParameters: 1
+      RootParametersOffset: 24
+      NumStaticSamplers: 0
+      StaticSamplersOffset: 60
+      Parameters:         
+      - ParameterType: 2 # SRV
+        ShaderVisibility: 3 # Domain
+        Descriptor:
+          ShaderRegister: 31
+          RegisterSpace: 32
+          DATA_STATIC_WHILE_SET_AT_EXECUTE: true
+      AllowInputAssemblerInputLayout: true
+      DenyGeometryShaderRootAccess: true
+
+# CHECK:  - Name:            RTS0
+# CHECK-NEXT:    Size:            96
+# CHECK-NEXT:    RootSignature:
+# CHECK-NEXT:      Version: 1
+# CHECK-NEXT:      NumRootParameters: 1
+# CHECK-NEXT:      RootParametersOffset: 24
+# CHECK-NEXT:      NumStaticSamplers: 0
+# CHECK-NEXT:      StaticSamplersOffset: 60
+# CHECK-NEXT:      Parameters:         
+# CHECK-NEXT:      - ParameterType: 2
+# CHECK-NEXT:        ShaderVisibility: 3
+# CHECK-NEXT:        Descriptor:
+# CHECK-NEXT:          RegisterSpace: 32
+# CHECK-NEXT:          ShaderRegister: 31
+# CHECK-NEXT:      AllowInputAssemblerInputLayout: true
+# CHECK-NEXT:      DenyGeometryShaderRootAccess: true
diff --git a/llvm/test/ObjectYAML/DXContainer/RootSignature-Descriptor1.1.yaml 
b/llvm/test/ObjectYAML/DXContainer/RootSignature-Descriptor1.1.yaml
new file mode 100644
index 0000000000000..64e01c6836e32
--- /dev/null
+++ b/llvm/test/ObjectYAML/DXContainer/RootSignature-Descriptor1.1.yaml
@@ -0,0 +1,47 @@
+# RUN: yaml2obj %s | obj2yaml | FileCheck %s
+
+--- !dxcontainer
+Header:
+  Hash:            [ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 
+                     0x0, 0x0, 0x0, 0x0, 0x0, 0x0 ]
+  Version:
+    Major:           1
+    Minor:           0
+  PartCount:       1
+  PartOffsets:     [ 60 ]
+Parts:
+  - Name:            RTS0
+    Size:            89
+    RootSignature:
+      Version: 2
+      NumRootParameters: 1
+      RootParametersOffset: 24
+      NumStaticSamplers: 0
+      StaticSamplersOffset: 60
+      Parameters:         
+      - ParameterType: 2 # SRV
+        ShaderVisibility: 3 # Domain
+        Descriptor:
+          ShaderRegister: 31
+          RegisterSpace: 32
+          DATA_STATIC_WHILE_SET_AT_EXECUTE: true
+      AllowInputAssemblerInputLayout: true
+      DenyGeometryShaderRootAccess: true
+
+# CHECK:  - Name:            RTS0
+# CHECK-NEXT:    Size:            89
+# CHECK-NEXT:    RootSignature:
+# CHECK-NEXT:      Version: 2
+# CHECK-NEXT:      NumRootParameters: 1
+# CHECK-NEXT:      RootParametersOffset: 24
+# CHECK-NEXT:      NumStaticSamplers: 0
+# CHECK-NEXT:      StaticSamplersOffset: 60
+# CHECK-NEXT:      Parameters:         
+# CHECK-NEXT:      - ParameterType: 2
+# CHECK-NEXT:        ShaderVisibility: 3
+# CHECK-NEXT:        Descriptor:
+# CHECK-NEXT:          RegisterSpace: 32
+# CHECK-NEXT:          ShaderRegister: 31
+# CHECK-NEXT:          DATA_STATIC_WHILE_SET_AT_EXECUTE: true
+# CHECK-NEXT:      AllowInputAssemblerInputLayout: true
+# CHECK-NEXT:      DenyGeometryShaderRootAccess: true
diff --git 
a/llvm/test/ObjectYAML/DXContainer/RootSignature-MultipleParameters.yaml 
b/llvm/test/ObjectYAML/DXContainer/RootSignature-MultipleParameters.yaml
index ed7d6ed4542ad..debb459c3944e 100644
--- a/llvm/test/ObjectYAML/DXContainer/RootSignature-MultipleParameters.yaml
+++ b/llvm/test/ObjectYAML/DXContainer/RootSignature-MultipleParameters.yaml
@@ -64,8 +64,8 @@ Parts:
 # CHECK-NEXT:        - ParameterType:   2
 # CHECK-NEXT:          ShaderVisibility: 3
 # CHECK-NEXT:          Descriptor:
-# CHECK-NEXT:            RegisterSpace:   31
-# CHECK-NEXT:            ShaderRegister:  32
+# CHECK-NEXT:            RegisterSpace:   32
+# CHECK-NEXT:            ShaderRegister:  31
 # CHECK-NEXT:            DATA_STATIC_WHILE_SET_AT_EXECUTE: true
 # CHECK-NEXT:      AllowInputAssemblerInputLayout: true
 # CHECK-NEXT:      DenyGeometryShaderRootAccess: true
diff --git a/llvm/unittests/Object/DXContainerTest.cpp 
b/llvm/unittests/Object/DXContainerTest.cpp
index 62ef8e385373f..ed43f6deaa951 100644
--- a/llvm/unittests/Object/DXContainerTest.cpp
+++ b/llvm/unittests/Object/DXContainerTest.cpp
@@ -959,3 +959,94 @@ TEST(RootSignature, ParseRootConstant) {
     ASSERT_EQ(Constants->Num32BitValues, 16u);
   }
 }
+
+TEST(RootSignature, ParseRootDescriptor) {
+  {
+    uint8_t Buffer[] = {
+        0x44, 0x58, 0x42, 0x43, 0x32, 0x9a, 0x53, 0xd8, 0xec, 0xbe, 0x35, 0x6f,
+        0x05, 0x39, 0xe1, 0xfe, 0x31, 0x20, 0xf0, 0xc1, 0x01, 0x00, 0x00, 0x00,
+        0x85, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x24, 0x00, 0x00, 0x00,
+        0x52, 0x54, 0x53, 0x30, 0x59, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+        0x01, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x3c, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
+        0x03, 0x00, 0x00, 0x00, 0x24, 0x00, 0x00, 0x00, 0x1f, 0x00, 0x00, 0x00,
+        0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00};
+    DXContainer C =
+        llvm::cantFail(DXContainer::create(getMemoryBuffer<133>(Buffer)));
+
+    auto MaybeRS = C.getRootSignature();
+    ASSERT_TRUE(MaybeRS.has_value());
+    const auto &RS = MaybeRS.value();
+    ASSERT_EQ(RS.getVersion(), 1u);
+    ASSERT_EQ(RS.getNumParameters(), 1u);
+    ASSERT_EQ(RS.getRootParametersOffset(), 24u);
+    ASSERT_EQ(RS.getNumStaticSamplers(), 0u);
+    ASSERT_EQ(RS.getStaticSamplersOffset(), 60u);
+    ASSERT_EQ(RS.getFlags(), 17u);
+
+    auto RootParam = *RS.param_headers().begin();
+    ASSERT_EQ((unsigned)RootParam.ParameterType, 2u);
+    ASSERT_EQ((unsigned)RootParam.ShaderVisibility, 3u);
+    auto ParamView = RS.getParameter(RootParam);
+    ASSERT_THAT_ERROR(ParamView.takeError(), Succeeded());
+
+    DirectX::RootDescriptorView_V1_0 *RootDescriptorView =
+        dyn_cast<DirectX::RootDescriptorView_V1_0>(&*ParamView);
+    ASSERT_TRUE(RootDescriptorView != nullptr);
+    auto Descriptor = RootDescriptorView->read();
+
+    ASSERT_THAT_ERROR(Descriptor.takeError(), Succeeded());
+
+    ASSERT_EQ(Descriptor->ShaderRegister, 31u);
+    ASSERT_EQ(Descriptor->RegisterSpace, 32u);
+  }
+
+  {
+    uint8_t Buffer[] = {
+        0x44, 0x58, 0x42, 0x43, 0x32, 0x9a, 0x53, 0xd8, 0xec, 0xbe, 0x35, 0x6f,
+        0x05, 0x39, 0xe1, 0xfe, 0x31, 0x20, 0xf0, 0xc1, 0x01, 0x00, 0x00, 0x00,
+        0x85, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x24, 0x00, 0x00, 0x00,
+        0x52, 0x54, 0x53, 0x30, 0x59, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
+        0x01, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x3c, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
+        0x03, 0x00, 0x00, 0x00, 0x24, 0x00, 0x00, 0x00, 0x1f, 0x00, 0x00, 0x00,
+        0x20, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00};
+    DXContainer C =
+        llvm::cantFail(DXContainer::create(getMemoryBuffer<133>(Buffer)));
+
+    auto MaybeRS = C.getRootSignature();
+    ASSERT_TRUE(MaybeRS.has_value());
+    const auto &RS = MaybeRS.value();
+    ASSERT_EQ(RS.getVersion(), 2u);
+    ASSERT_EQ(RS.getNumParameters(), 1u);
+    ASSERT_EQ(RS.getRootParametersOffset(), 24u);
+    ASSERT_EQ(RS.getNumStaticSamplers(), 0u);
+    ASSERT_EQ(RS.getStaticSamplersOffset(), 60u);
+    ASSERT_EQ(RS.getFlags(), 17u);
+
+    auto RootParam = *RS.param_headers().begin();
+    ASSERT_EQ((unsigned)RootParam.ParameterType, 2u);
+    ASSERT_EQ((unsigned)RootParam.ShaderVisibility, 3u);
+    auto ParamView = RS.getParameter(RootParam);
+    ASSERT_THAT_ERROR(ParamView.takeError(), Succeeded());
+
+    DirectX::RootDescriptorView_V1_1 *RootDescriptorView =
+        dyn_cast<DirectX::RootDescriptorView_V1_1>(&*ParamView);
+    ASSERT_TRUE(RootDescriptorView != nullptr);
+    auto Descriptor = RootDescriptorView->read();
+
+    ASSERT_THAT_ERROR(Descriptor.takeError(), Succeeded());
+
+    ASSERT_EQ(Descriptor->ShaderRegister, 31u);
+    ASSERT_EQ(Descriptor->RegisterSpace, 32u);
+    ASSERT_EQ(Descriptor->Flags, 4u);
+  }
+}
diff --git a/llvm/unittests/ObjectYAML/DXContainerYAMLTest.cpp 
b/llvm/unittests/ObjectYAML/DXContainerYAMLTest.cpp
index 61390049bc0df..b6a5cee24b29d 100644
--- a/llvm/unittests/ObjectYAML/DXContainerYAMLTest.cpp
+++ b/llvm/unittests/ObjectYAML/DXContainerYAMLTest.cpp
@@ -251,3 +251,106 @@ TEST(RootSignature, ParseRootConstants) {
   EXPECT_EQ(Storage.size(), 133u);
   EXPECT_TRUE(memcmp(Buffer, Storage.data(), 133u) == 0);
 }
+
+TEST(RootSignature, ParseRootDescriptorsV10) {
+  SmallString<128> Storage;
+
+  // First read a fully explicit yaml with all sizes and offsets provided
+  ASSERT_TRUE(convert(Storage, R"(--- !dxcontainer
+  Header:
+      Hash:            [ 0x32, 0x9A, 0x53, 0xD8, 0xEC, 0xBE, 0x35, 0x6F, 0x5, 
+                        0x39, 0xE1, 0xFE, 0x31, 0x20, 0xF0, 0xC1 ]
+      Version:
+        Major:           1
+        Minor:           0
+      FileSize:        133
+      PartCount:       1
+      PartOffsets:     [ 36 ]
+  Parts:
+  - Name:            RTS0
+    Size:            89
+    RootSignature:
+      Version: 1
+      NumRootParameters: 1
+      RootParametersOffset: 24
+      NumStaticSamplers: 0
+      StaticSamplersOffset: 60
+      Parameters:         
+      - ParameterType: 2 # SRV
+        ShaderVisibility: 3 # Domain
+        Descriptor:
+          ShaderRegister: 31
+          RegisterSpace: 32
+      AllowInputAssemblerInputLayout: true
+      DenyGeometryShaderRootAccess: true
+    )"));
+
+  uint8_t Buffer[] = {
+      0x44, 0x58, 0x42, 0x43, 0x32, 0x9a, 0x53, 0xd8, 0xec, 0xbe, 0x35, 0x6f,
+      0x05, 0x39, 0xe1, 0xfe, 0x31, 0x20, 0xf0, 0xc1, 0x01, 0x00, 0x00, 0x00,
+      0x85, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x24, 0x00, 0x00, 0x00,
+      0x52, 0x54, 0x53, 0x30, 0x59, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+      0x01, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x3c, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
+      0x03, 0x00, 0x00, 0x00, 0x24, 0x00, 0x00, 0x00, 0x1f, 0x00, 0x00, 0x00,
+      0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00};
+
+  EXPECT_EQ(Storage.size(), 133u);
+  EXPECT_TRUE(memcmp(Buffer, Storage.data(), 133u) == 0);
+}
+
+TEST(RootSignature, ParseRootDescriptorsV11) {
+  SmallString<128> Storage;
+
+  // First read a fully explicit yaml with all sizes and offsets provided
+  ASSERT_TRUE(convert(Storage, R"(--- !dxcontainer
+  Header:
+      Hash:            [ 0x32, 0x9A, 0x53, 0xD8, 0xEC, 0xBE, 0x35, 0x6F, 0x5, 
+                        0x39, 0xE1, 0xFE, 0x31, 0x20, 0xF0, 0xC1 ]
+      Version:
+        Major:           1
+        Minor:           0
+      FileSize:        133
+      PartCount:       1
+      PartOffsets:     [ 36 ]
+  Parts:
+  - Name:            RTS0
+    Size:            89
+    RootSignature:
+      Version: 2
+      NumRootParameters: 1
+      RootParametersOffset: 24
+      NumStaticSamplers: 0
+      StaticSamplersOffset: 60
+      Parameters:         
+      - ParameterType: 2 # SRV
+        ShaderVisibility: 3 # Domain
+        Descriptor:
+          ShaderRegister: 31
+          RegisterSpace: 32
+          DATA_STATIC_WHILE_SET_AT_EXECUTE: true
+      AllowInputAssemblerInputLayout: true
+      DenyGeometryShaderRootAccess: true
+    )"));
+
+  uint8_t Buffer[] = {
+      0x44, 0x58, 0x42, 0x43, 0x32, 0x9a, 0x53, 0xd8, 0xec, 0xbe, 0x35, 0x6f,
+      0x05, 0x39, 0xe1, 0xfe, 0x31, 0x20, 0xf0, 0xc1, 0x01, 0x00, 0x00, 0x00,
+      0x85, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x24, 0x00, 0x00, 0x00,
+      0x52, 0x54, 0x53, 0x30, 0x59, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
+      0x01, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x3c, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
+      0x03, 0x00, 0x00, 0x00, 0x24, 0x00, 0x00, 0x00, 0x1f, 0x00, 0x00, 0x00,
+      0x20, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00};
+
+  EXPECT_EQ(Storage.size(), 133u);
+  EXPECT_TRUE(memcmp(Buffer, Storage.data(), 133u) == 0);
+}

>From 7e57fa25747296b8bee28c73fe5da119f9ad6943 Mon Sep 17 00:00:00 2001
From: joaosaffran <joao.saff...@microsoft.com>
Date: Fri, 18 Apr 2025 02:36:57 +0000
Subject: [PATCH 3/4] adding test

---
 llvm/include/llvm/Object/DXContainer.h  | 34 ++++++++++++++-----------
 llvm/lib/ObjectYAML/DXContainerYAML.cpp |  4 ---
 2 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/llvm/include/llvm/Object/DXContainer.h 
b/llvm/include/llvm/Object/DXContainer.h
index 7812906700fe3..d6c9315842289 100644
--- a/llvm/include/llvm/Object/DXContainer.h
+++ b/llvm/include/llvm/Object/DXContainer.h
@@ -25,6 +25,7 @@
 #include "llvm/TargetParser/Triple.h"
 #include <array>
 #include <cstddef>
+#include <cstdint>
 #include <variant>
 
 namespace llvm {
@@ -121,9 +122,10 @@ template <typename T> struct ViewArray {
 namespace DirectX {
 struct RootParameterView {
   const dxbc::RootParameterHeader &Header;
+  uint32_t Version;
   StringRef ParamData;
-  RootParameterView(const dxbc::RootParameterHeader &H, StringRef P)
-      : Header(H), ParamData(P) {}
+  RootParameterView(uint32_t V, const dxbc::RootParameterHeader &H, StringRef 
P)
+      : Header(H), Version(V), ParamData(P) {}
 
   template <typename T> Expected<T> readParameter() {
     T Struct;
@@ -152,12 +154,13 @@ struct RootConstantView : RootParameterView {
 
 struct RootDescriptorView_V1_0 : RootParameterView {
   static bool classof(const RootParameterView *V) {
-    return (V->Header.ParameterType ==
-                llvm::to_underlying(dxbc::RootParameterType::CBV) ||
-            V->Header.ParameterType ==
-                llvm::to_underlying(dxbc::RootParameterType::SRV) ||
-            V->Header.ParameterType ==
-                llvm::to_underlying(dxbc::RootParameterType::UAV));
+    return (V->Version == 1 &&
+            (V->Header.ParameterType ==
+                 llvm::to_underlying(dxbc::RootParameterType::CBV) ||
+             V->Header.ParameterType ==
+                 llvm::to_underlying(dxbc::RootParameterType::SRV) ||
+             V->Header.ParameterType ==
+                 llvm::to_underlying(dxbc::RootParameterType::UAV)));
   }
 
   llvm::Expected<dxbc::RootDescriptor_V1_0> read() {
@@ -167,12 +170,13 @@ struct RootDescriptorView_V1_0 : RootParameterView {
 
 struct RootDescriptorView_V1_1 : RootParameterView {
   static bool classof(const RootParameterView *V) {
-    return (V->Header.ParameterType ==
-                llvm::to_underlying(dxbc::RootParameterType::CBV) ||
-            V->Header.ParameterType ==
-                llvm::to_underlying(dxbc::RootParameterType::SRV) ||
-            V->Header.ParameterType ==
-                llvm::to_underlying(dxbc::RootParameterType::UAV));
+    return (V->Version == 2 &&
+            (V->Header.ParameterType ==
+                 llvm::to_underlying(dxbc::RootParameterType::CBV) ||
+             V->Header.ParameterType ==
+                 llvm::to_underlying(dxbc::RootParameterType::SRV) ||
+             V->Header.ParameterType ==
+                 llvm::to_underlying(dxbc::RootParameterType::UAV)));
   }
 
   llvm::Expected<dxbc::RootDescriptor_V1_1> read() {
@@ -240,7 +244,7 @@ class RootSignature {
       return parseFailed("Reading structure out of file bounds");
 
     StringRef Buff = PartData.substr(Header.ParameterOffset, DataSize);
-    RootParameterView View = RootParameterView(Header, Buff);
+    RootParameterView View = RootParameterView(Version, Header, Buff);
     return View;
   }
 };
diff --git a/llvm/lib/ObjectYAML/DXContainerYAML.cpp 
b/llvm/lib/ObjectYAML/DXContainerYAML.cpp
index af5bc7388ae22..f1bc2a49fe3ba 100644
--- a/llvm/lib/ObjectYAML/DXContainerYAML.cpp
+++ b/llvm/lib/ObjectYAML/DXContainerYAML.cpp
@@ -81,7 +81,6 @@ DXContainerYAML::RootSignatureYamlDesc::create(
       NewP.Constants.RegisterSpace = Constants.RegisterSpace;
     }
 
-    if (V == 1) {
       if (auto *RDV =
               dyn_cast<object::DirectX::RootDescriptorView_V1_0>(&ParamView)) {
         llvm::Expected<dxbc::RootDescriptor_V1_0> DescriptorOrErr = 
RDV->read();
@@ -92,9 +91,7 @@ DXContainerYAML::RootSignatureYamlDesc::create(
         NewP.Descriptor.ShaderRegister = Descriptor.ShaderRegister;
         NewP.Descriptor.RegisterSpace = Descriptor.RegisterSpace;
       }
-    }
 
-    if (V == 2) {
       if (auto *RDV =
               dyn_cast<object::DirectX::RootDescriptorView_V1_1>(&ParamView)) {
         llvm::Expected<dxbc::RootDescriptor_V1_1> DescriptorOrErr = 
RDV->read();
@@ -109,7 +106,6 @@ DXContainerYAML::RootSignatureYamlDesc::create(
        llvm::to_underlying(dxbc::RootDescriptorFlag::Val)) > 0;
 #include "llvm/BinaryFormat/DXContainerConstants.def"
       }
-    }
 
     RootSigDesc.Parameters.push_back(NewP);
   }

>From 6bb7f4a8c9da5cf438069e68b4769cd88a55393e Mon Sep 17 00:00:00 2001
From: joaosaffran <joao.saff...@microsoft.com>
Date: Tue, 22 Apr 2025 18:33:38 +0000
Subject: [PATCH 4/4] clean up

---
 llvm/include/llvm/BinaryFormat/DXContainer.h  |  1 -
 llvm/include/llvm/Object/DXContainer.h        |  2 -
 .../include/llvm/ObjectYAML/DXContainerYAML.h |  4 +-
 llvm/lib/MC/DXContainerRootSignature.cpp      |  1 -
 llvm/lib/ObjectYAML/DXContainerEmitter.cpp    |  2 +-
 llvm/lib/ObjectYAML/DXContainerYAML.cpp       | 47 +++++++++----------
 .../RootSignature-Descriptor1.0.yaml          |  1 -
 7 files changed, 23 insertions(+), 35 deletions(-)

diff --git a/llvm/include/llvm/BinaryFormat/DXContainer.h 
b/llvm/include/llvm/BinaryFormat/DXContainer.h
index d6e585c94fed1..2e9b3089a6da5 100644
--- a/llvm/include/llvm/BinaryFormat/DXContainer.h
+++ b/llvm/include/llvm/BinaryFormat/DXContainer.h
@@ -18,7 +18,6 @@
 #include "llvm/Support/SwapByteOrder.h"
 #include "llvm/TargetParser/Triple.h"
 
-#include <cstdint>
 #include <stdint.h>
 
 namespace llvm {
diff --git a/llvm/include/llvm/Object/DXContainer.h 
b/llvm/include/llvm/Object/DXContainer.h
index d6c9315842289..7b64c8ee15ae6 100644
--- a/llvm/include/llvm/Object/DXContainer.h
+++ b/llvm/include/llvm/Object/DXContainer.h
@@ -15,7 +15,6 @@
 #ifndef LLVM_OBJECT_DXCONTAINER_H
 #define LLVM_OBJECT_DXCONTAINER_H
 
-#include "llvm/ADT/STLForwardCompat.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/BinaryFormat/DXContainer.h"
@@ -25,7 +24,6 @@
 #include "llvm/TargetParser/Triple.h"
 #include <array>
 #include <cstddef>
-#include <cstdint>
 #include <variant>
 
 namespace llvm {
diff --git a/llvm/include/llvm/ObjectYAML/DXContainerYAML.h 
b/llvm/include/llvm/ObjectYAML/DXContainerYAML.h
index 2026a2c08d472..e86a869da99bc 100644
--- a/llvm/include/llvm/ObjectYAML/DXContainerYAML.h
+++ b/llvm/include/llvm/ObjectYAML/DXContainerYAML.h
@@ -15,7 +15,6 @@
 #ifndef LLVM_OBJECTYAML_DXCONTAINERYAML_H
 #define LLVM_OBJECTYAML_DXCONTAINERYAML_H
 
-#include "llvm/ADT/STLForwardCompat.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/BinaryFormat/DXContainer.h"
 #include "llvm/Object/DXContainer.h"
@@ -25,7 +24,6 @@
 #include <cstdint>
 #include <optional>
 #include <string>
-#include <variant>
 #include <vector>
 
 namespace llvm {
@@ -88,7 +86,7 @@ struct RootDescriptorYaml {
   uint32_t ShaderRegister;
   uint32_t RegisterSpace;
 
-  uint32_t getEncodedFlags();
+  uint32_t getEncodedFlags() const;
 
 #include "llvm/BinaryFormat/DXContainerConstants.def"
 };
diff --git a/llvm/lib/MC/DXContainerRootSignature.cpp 
b/llvm/lib/MC/DXContainerRootSignature.cpp
index 91b158ba22d2c..25ea3cc081295 100644
--- a/llvm/lib/MC/DXContainerRootSignature.cpp
+++ b/llvm/lib/MC/DXContainerRootSignature.cpp
@@ -8,7 +8,6 @@
 
 #include "llvm/MC/DXContainerRootSignature.h"
 #include "llvm/ADT/SmallString.h"
-#include "llvm/BinaryFormat/DXContainer.h"
 #include "llvm/Support/EndianStream.h"
 
 using namespace llvm;
diff --git a/llvm/lib/ObjectYAML/DXContainerEmitter.cpp 
b/llvm/lib/ObjectYAML/DXContainerEmitter.cpp
index a931084e50d34..be0e52fef04f5 100644
--- a/llvm/lib/ObjectYAML/DXContainerEmitter.cpp
+++ b/llvm/lib/ObjectYAML/DXContainerEmitter.cpp
@@ -273,7 +273,7 @@ void DXContainerWriter::writeParts(raw_ostream &OS) {
       RS.NumStaticSamplers = P.RootSignature->NumStaticSamplers;
       RS.StaticSamplersOffset = P.RootSignature->StaticSamplersOffset;
 
-      for (auto &Param : P.RootSignature->Parameters) {
+      for (const auto &Param : P.RootSignature->Parameters) {
         mcdxbc::RootParameter NewParam;
         NewParam.Header = dxbc::RootParameterHeader{
             Param.Type, Param.Visibility, Param.Offset};
diff --git a/llvm/lib/ObjectYAML/DXContainerYAML.cpp 
b/llvm/lib/ObjectYAML/DXContainerYAML.cpp
index f1bc2a49fe3ba..ecfcd3bb0148e 100644
--- a/llvm/lib/ObjectYAML/DXContainerYAML.cpp
+++ b/llvm/lib/ObjectYAML/DXContainerYAML.cpp
@@ -14,7 +14,6 @@
 #include "llvm/ObjectYAML/DXContainerYAML.h"
 #include "llvm/ADT/STLForwardCompat.h"
 #include "llvm/ADT/ScopeExit.h"
-#include "llvm/BinaryFormat/DXContainer.h"
 #include "llvm/Object/DXContainer.h"
 #include "llvm/Support/Error.h"
 #include "llvm/Support/ScopedPrinter.h"
@@ -39,9 +38,8 @@ DXContainerYAML::RootSignatureYamlDesc::create(
     const object::DirectX::RootSignature &Data) {
 
   RootSignatureYamlDesc RootSigDesc;
-  uint32_t V = Data.getVersion();
 
-  RootSigDesc.Version = V;
+  RootSigDesc.Version = Data.getVersion();
   RootSigDesc.NumStaticSamplers = Data.getNumStaticSamplers();
   RootSigDesc.StaticSamplersOffset = Data.getStaticSamplersOffset();
   RootSigDesc.NumRootParameters = Data.getNumRootParameters();
@@ -49,6 +47,7 @@ DXContainerYAML::RootSignatureYamlDesc::create(
 
   uint32_t Flags = Data.getFlags();
   for (const dxbc::RootParameterHeader &PH : Data.param_headers()) {
+
     if (!dxbc::isValidParameterType(PH.ParameterType))
       return createStringError(std::errc::invalid_argument,
                                "Invalid value for parameter type");
@@ -79,33 +78,29 @@ DXContainerYAML::RootSignatureYamlDesc::create(
       NewP.Constants.Num32BitValues = Constants.Num32BitValues;
       NewP.Constants.ShaderRegister = Constants.ShaderRegister;
       NewP.Constants.RegisterSpace = Constants.RegisterSpace;
-    }
-
-      if (auto *RDV =
-              dyn_cast<object::DirectX::RootDescriptorView_V1_0>(&ParamView)) {
-        llvm::Expected<dxbc::RootDescriptor_V1_0> DescriptorOrErr = 
RDV->read();
-        if (Error E = DescriptorOrErr.takeError())
-          return std::move(E);
-        auto Descriptor = *DescriptorOrErr;
-
-        NewP.Descriptor.ShaderRegister = Descriptor.ShaderRegister;
-        NewP.Descriptor.RegisterSpace = Descriptor.RegisterSpace;
-      }
-
-      if (auto *RDV =
-              dyn_cast<object::DirectX::RootDescriptorView_V1_1>(&ParamView)) {
-        llvm::Expected<dxbc::RootDescriptor_V1_1> DescriptorOrErr = 
RDV->read();
-        if (Error E = DescriptorOrErr.takeError())
-          return std::move(E);
-        auto Descriptor = *DescriptorOrErr;
-        NewP.Descriptor.ShaderRegister = Descriptor.ShaderRegister;
-        NewP.Descriptor.RegisterSpace = Descriptor.RegisterSpace;
+    } else if (auto *RDV = dyn_cast<object::DirectX::RootDescriptorView_V1_0>(
+                   &ParamView)) {
+      llvm::Expected<dxbc::RootDescriptor_V1_0> DescriptorOrErr = RDV->read();
+      if (Error E = DescriptorOrErr.takeError())
+        return std::move(E);
+      auto Descriptor = *DescriptorOrErr;
+
+      NewP.Descriptor.ShaderRegister = Descriptor.ShaderRegister;
+      NewP.Descriptor.RegisterSpace = Descriptor.RegisterSpace;
+    } else if (auto *RDV = dyn_cast<object::DirectX::RootDescriptorView_V1_1>(
+                   &ParamView)) {
+      llvm::Expected<dxbc::RootDescriptor_V1_1> DescriptorOrErr = RDV->read();
+      if (Error E = DescriptorOrErr.takeError())
+        return std::move(E);
+      auto Descriptor = *DescriptorOrErr;
+      NewP.Descriptor.ShaderRegister = Descriptor.ShaderRegister;
+      NewP.Descriptor.RegisterSpace = Descriptor.RegisterSpace;
 #define ROOT_DESCRIPTOR_FLAG(Num, Val)                                         
\
   NewP.Descriptor.Val =                                                        
\
       (Descriptor.Flags &                                                      
\
        llvm::to_underlying(dxbc::RootDescriptorFlag::Val)) > 0;
 #include "llvm/BinaryFormat/DXContainerConstants.def"
-      }
+    }
 
     RootSigDesc.Parameters.push_back(NewP);
   }
@@ -116,7 +111,7 @@ DXContainerYAML::RootSignatureYamlDesc::create(
   return RootSigDesc;
 }
 
-uint32_t DXContainerYAML::RootDescriptorYaml::getEncodedFlags() {
+uint32_t DXContainerYAML::RootDescriptorYaml::getEncodedFlags() const {
   uint64_t Flag = 0;
 #define ROOT_DESCRIPTOR_FLAG(Num, Val)                                         
\
   if (Val)                                                                     
\
diff --git a/llvm/test/ObjectYAML/DXContainer/RootSignature-Descriptor1.0.yaml 
b/llvm/test/ObjectYAML/DXContainer/RootSignature-Descriptor1.0.yaml
index e19f3de894c07..46cdf416ffcae 100644
--- a/llvm/test/ObjectYAML/DXContainer/RootSignature-Descriptor1.0.yaml
+++ b/llvm/test/ObjectYAML/DXContainer/RootSignature-Descriptor1.0.yaml
@@ -24,7 +24,6 @@ Parts:
         Descriptor:
           ShaderRegister: 31
           RegisterSpace: 32
-          DATA_STATIC_WHILE_SET_AT_EXECUTE: true
       AllowInputAssemblerInputLayout: true
       DenyGeometryShaderRootAccess: true
 

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