From 3638e7735be67c8f4dae3f4544134441aa1e029d Mon Sep 17 00:00:00 2001
From: jsmall-nvidia <jsmall@nvidia.com>
Date: Thu, 21 Apr 2022 13:47:18 -0400
Subject: `export` support in HLSL (#2188)

* #include an absolute path didn't work - because paths were taken to always be relative.

* Compile to a dxil library.

* Added CompileProduct.

* Support handling of ModuleLibrary.

* CacheBehavior -> Cache

* Use CompileProduct for -r references.

* CompileProduct -> Artifact.

* Determining an artifact type on binding.

* Determine binary linkability.

* Added Artifact::exists.

* Added ArtifactKeep.

* Small fixes.

* Small improvements to Artifact.

* Add zip extension.

* Fix some comments.

* Fix multiple adding of PublicDecoration.
Make public output export for DXIL/lib.
Add checking for simpleDecorations such that only added once.

* Use 'whole program' to identify library build.

* Add -target dxil so test infrastructure knows it needs DXC.
---
 source/slang/slang-ir.cpp | 40 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

(limited to 'source/slang/slang-ir.cpp')

diff --git a/source/slang/slang-ir.cpp b/source/slang/slang-ir.cpp
index 09a28e394..b53c247c3 100644
--- a/source/slang/slang-ir.cpp
+++ b/source/slang/slang-ir.cpp
@@ -23,8 +23,36 @@ namespace Slang
             sb << nameHint->getName();
     }
 
-    // !!!!!!!!!!!!!!!!!!!!!!!!!!!! DiagnosticSink Impls !!!!!!!!!!!!!!!!!!!!!
+    // !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+
+    bool isSimpleDecoration(IROp op)
+    {
+        switch (op)
+        {
+            case kIROp_EarlyDepthStencilDecoration: return true;
+            case kIROp_GloballyCoherentDecoration: return true;
+            case kIROp_KeepAliveDecoration: return true;
+            case kIROp_LineAdjInputPrimitiveTypeDecoration: return true;
+            case kIROp_LineInputPrimitiveTypeDecoration: return true;
+            case kIROp_NoInlineDecoration: return true;
+            case kIROp_PointInputPrimitiveTypeDecoration: return true;
+            case kIROp_PreciseDecoration: return true;
+            case kIROp_PublicDecoration: return true;
+            case kIROp_ReadNoneDecoration: return true;
+            case kIROp_RequiresNVAPIDecoration: return true;
+            case kIROp_TriangleAdjInputPrimitiveTypeDecoration: return true;
+            case kIROp_TriangleInputPrimitiveTypeDecoration: return true;
+            case kIROp_UnsafeForceInlineEarlyDecoration: return true;
+            case kIROp_VulkanCallablePayloadDecoration: return true;
+            case kIROp_VulkanHitAttributesDecoration: return true;
+            case kIROp_VulkanRayPayloadDecoration: return true;
+            default: break;
+        }
+        return false;
+    }
 
+    
     IRInst* cloneGlobalValueWithLinkage(
         IRSpecContext*          context,
         IRInst*                 originalVal,
@@ -4172,6 +4200,16 @@ namespace Slang
 
     IRDecoration* IRBuilder::addDecoration(IRInst* value, IROp op, IRInst* const* operands, Int operandCount)
     {
+        // If it's a simple (ie stateless) decoration, don't add it again.
+        if (operandCount == 0 && isSimpleDecoration(op))
+        {
+            auto decoration = value->findDecorationImpl(op);
+            if (decoration)
+            {
+                return decoration;
+            }
+        }
+
         auto decoration = createInstWithTrailingArgs<IRDecoration>(
             this,
             op,
-- 
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