[llvm-branch-commits] [clang] [llvm] [HLSL][RootSignature] Add space, visibility enums to StaticSampler (PR #140306)

[Finn Plummer via llvm-branch-commits]

https://github.com/inbelic updated 
https://github.com/llvm/llvm-project/pull/140306

>From da757494d005288becdf39f738f3bdcf792dd093 Mon Sep 17 00:00:00 2001
From: Finn Plummer <canadienf...@gmail.com>
Date: Fri, 16 May 2025 20:33:09 +0000
Subject: [PATCH] [HLSL][RootSignature] Add space, visibility enums to
 StaticSampler

---
 .../clang/Parse/ParseHLSLRootSignature.h      |  2 +
 clang/lib/Parse/ParseHLSLRootSignature.cpp    | 40 +++++++++++++++++++
 .../Parse/ParseHLSLRootSignatureTest.cpp      |  7 +++-
 .../llvm/Frontend/HLSL/HLSLRootSignature.h    |  2 +
 4 files changed, 50 insertions(+), 1 deletion(-)

diff --git a/clang/include/clang/Parse/ParseHLSLRootSignature.h 
b/clang/include/clang/Parse/ParseHLSLRootSignature.h
index 21df9d0da4a53..34d59d7fb66f4 100644
--- a/clang/include/clang/Parse/ParseHLSLRootSignature.h
+++ b/clang/include/clang/Parse/ParseHLSLRootSignature.h
@@ -121,6 +121,8 @@ 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 07bd10d00dfad..bd0f9abb5ff1b 100644
--- a/clang/lib/Parse/ParseHLSLRootSignature.cpp
+++ b/clang/lib/Parse/ParseHLSLRootSignature.cpp
@@ -411,6 +411,12 @@ 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))
@@ -866,6 +872,40 @@ 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 6343d9feb4411..3eede0dbed61b 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,
@@ -269,6 +270,8 @@ TEST_F(ParseHLSLRootSignatureTest, 
ValidParseStaticSamplerTest) {
             StaticBorderColor::OpaqueWhite);
   ASSERT_EQ(std::get<StaticSampler>(Elem).MinLOD, 0.f);
   ASSERT_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];
@@ -288,6 +291,8 @@ TEST_F(ParseHLSLRootSignatureTest, 
ValidParseStaticSamplerTest) {
             StaticBorderColor::OpaqueBlackUint);
   ASSERT_EQ(std::get<StaticSampler>(Elem).MinLOD, 4.2f);
   ASSERT_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 025e96ec93c2a..ee65722e68556 100644
--- a/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
+++ b/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
@@ -236,6 +236,8 @@ struct StaticSampler {
   StaticBorderColor BorderColor = StaticBorderColor::OpaqueWhite;
   float MinLOD = 0.f;
   float MaxLOD = 3.402823466e+38f; // FLT_MAX
+  uint32_t Space = 0;
+  ShaderVisibility Visibility = ShaderVisibility::All;
 };
 
 /// Models RootElement : RootFlags | RootConstants | RootParam

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