[clang] 0996bfc - [HLSL][RootSignature] Add space, visibility enums to StaticSampler (#140306)

[via cfe-commits]

Author: Finn Plummer
Date: 2025-05-30T17:50:47-07:00
New Revision: 0996bfc663e870fb3a7820beccded553f4d5fc37

URL: https://github.com/llvm/llvm-project/commit/0996bfc663e870fb3a7820beccded553f4d5fc37
DIFF: https://github.com/llvm/llvm-project/commit/0996bfc663e870fb3a7820beccded553f4d5fc37.diff

LOG: [HLSL][RootSignature] Add space, visibility enums to StaticSampler (#140306)

- adds the `space` and `visibility` parameters to StaticSampler
- adds basic unit tests to demonstrate setting functionality

Part 7 and Resolves https://github.com/llvm/llvm-project/issues/126574

Added: 
    

Modified: 
    clang/include/clang/Parse/ParseHLSLRootSignature.h
    clang/lib/Parse/ParseHLSLRootSignature.cpp
    clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp
    llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h

Removed: 
    


################################################################################
diff  --git a/clang/include/clang/Parse/ParseHLSLRootSignature.h b/clang/include/clang/Parse/ParseHLSLRootSignature.h
index 8052df1c568dd..66a887bc12e64 100644
--- a/clang/include/clang/Parse/ParseHLSLRootSignature.h
+++ b/clang/include/clang/Parse/ParseHLSLRootSignature.h
@@ -120,6 +120,8 @@ class RootSignatureParser {
     std::optional<llvm::hlsl::rootsig::StaticBorderColor> BorderColor;
     std::optional<float> MinLOD;
     std::optional<float> MaxLOD;
+    std::optional<uint32_t> Space;
+    std::optional<llvm::hlsl::rootsig::ShaderVisibility> Visibility;
   };
   std::optional<ParsedStaticSamplerParams> parseStaticSamplerParams();
 

diff  --git a/clang/lib/Parse/ParseHLSLRootSignature.cpp b/clang/lib/Parse/ParseHLSLRootSignature.cpp
index eb0ebee2e6ce9..39a28edee8e2a 100644
--- a/clang/lib/Parse/ParseHLSLRootSignature.cpp
+++ b/clang/lib/Parse/ParseHLSLRootSignature.cpp
@@ -404,6 +404,12 @@ std::optional<StaticSampler> RootSignatureParser::parseStaticSampler() {
   if (Params->MaxLOD.has_value())
     Sampler.MaxLOD = Params->MaxLOD.value();
 
+  if (Params->Space.has_value())
+    Sampler.Space = Params->Space.value();
+
+  if (Params->Visibility.has_value())
+    Sampler.Visibility = Params->Visibility.value();
+
   if (consumeExpectedToken(TokenKind::pu_r_paren,
                            diag::err_hlsl_unexpected_end_of_params,
                            /*param of=*/TokenKind::kw_StaticSampler))
@@ -842,6 +848,40 @@ RootSignatureParser::parseStaticSamplerParams() {
         return std::nullopt;
       Params.MaxLOD = MaxLOD;
     }
+
+    // `space` `=` POS_INT
+    if (tryConsumeExpectedToken(TokenKind::kw_space)) {
+      if (Params.Space.has_value()) {
+        getDiags().Report(CurToken.TokLoc, diag::err_hlsl_rootsig_repeat_param)
+            << CurToken.TokKind;
+        return std::nullopt;
+      }
+
+      if (consumeExpectedToken(TokenKind::pu_equal))
+        return std::nullopt;
+
+      auto Space = parseUIntParam();
+      if (!Space.has_value())
+        return std::nullopt;
+      Params.Space = Space;
+    }
+
+    // `visibility` `=` SHADER_VISIBILITY
+    if (tryConsumeExpectedToken(TokenKind::kw_visibility)) {
+      if (Params.Visibility.has_value()) {
+        getDiags().Report(CurToken.TokLoc, diag::err_hlsl_rootsig_repeat_param)
+            << CurToken.TokKind;
+        return std::nullopt;
+      }
+
+      if (consumeExpectedToken(TokenKind::pu_equal))
+        return std::nullopt;
+
+      auto Visibility = parseShaderVisibility();
+      if (!Visibility.has_value())
+        return std::nullopt;
+      Params.Visibility = Visibility;
+    }
   } while (tryConsumeExpectedToken(TokenKind::pu_comma));
 
   return Params;

diff  --git a/clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp b/clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp
index 5330355596356..d45f99e06c630 100644
--- a/clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp
+++ b/clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp
@@ -226,7 +226,8 @@ TEST_F(ParseHLSLRootSignatureTest, ValidParseDTClausesTest) {
 TEST_F(ParseHLSLRootSignatureTest, ValidParseStaticSamplerTest) {
   const llvm::StringLiteral Source = R"cc(
     StaticSampler(s0),
-    StaticSampler(s0, maxAnisotropy = 3,
+    StaticSampler(s0, maxAnisotropy = 3, space = 4,
+      visibility = SHADER_VISIBILITY_DOMAIN,
       minLOD = 4.2f, mipLODBias = 0.23e+3,
       addressW = TEXTURE_ADDRESS_CLAMP,
       addressV = TEXTURE_ADDRESS_BORDER,
@@ -266,6 +267,8 @@ TEST_F(ParseHLSLRootSignatureTest, ValidParseStaticSamplerTest) {
             StaticBorderColor::OpaqueWhite);
   ASSERT_FLOAT_EQ(std::get<StaticSampler>(Elem).MinLOD, 0.f);
   ASSERT_FLOAT_EQ(std::get<StaticSampler>(Elem).MaxLOD, 3.402823466e+38f);
+  ASSERT_EQ(std::get<StaticSampler>(Elem).Space, 0u);
+  ASSERT_EQ(std::get<StaticSampler>(Elem).Visibility, ShaderVisibility::All);
 
   // Check values can be set as expected
   Elem = Elements[1];
@@ -282,6 +285,8 @@ TEST_F(ParseHLSLRootSignatureTest, ValidParseStaticSamplerTest) {
             StaticBorderColor::OpaqueBlackUint);
   ASSERT_FLOAT_EQ(std::get<StaticSampler>(Elem).MinLOD, 4.2f);
   ASSERT_FLOAT_EQ(std::get<StaticSampler>(Elem).MaxLOD, 9000.f);
+  ASSERT_EQ(std::get<StaticSampler>(Elem).Space, 4u);
+  ASSERT_EQ(std::get<StaticSampler>(Elem).Visibility, ShaderVisibility::Domain);
 
   ASSERT_TRUE(Consumer->isSatisfied());
 }

diff  --git a/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h b/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
index cbecf37d01f0d..4d4fb261595ad 100644
--- a/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
+++ b/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
@@ -193,6 +193,8 @@ struct StaticSampler {
   StaticBorderColor BorderColor = StaticBorderColor::OpaqueWhite;
   float MinLOD = 0.f;
   float MaxLOD = std::numeric_limits<float>::max();
+  uint32_t Space = 0;
+  ShaderVisibility Visibility = ShaderVisibility::All;
 };
 
 /// Models RootElement : RootFlags | RootConstants | RootParam