From d939773a9127bccbbd22903eb5b5620ad7127d37 Mon Sep 17 00:00:00 2001
From: jsmall-nvidia <jsmall@nvidia.com>
Date: Fri, 15 Apr 2022 15:46:45 -0400
Subject: DXIL library support and Artifact type (#2186)

* #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.
---
 source/slang/slang-compiler.cpp | 54 ++++++++++++++++++++++++++---------------
 1 file changed, 34 insertions(+), 20 deletions(-)

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

diff --git a/source/slang/slang-compiler.cpp b/source/slang/slang-compiler.cpp
index 1b20a869d..80899e69e 100644
--- a/source/slang/slang-compiler.cpp
+++ b/source/slang/slang-compiler.cpp
@@ -1193,24 +1193,46 @@ void printDiagnosticArg(StringBuilder& sb, CodeGenTarget val)
         // Disable exceptions and security checks
         options.flags &= ~(CompileOptions::Flag::EnableExceptionHandling | CompileOptions::Flag::EnableSecurityChecks);
 
+        Profile profile;
+
         if (compilerType == PassThroughMode::Fxc ||
             compilerType == PassThroughMode::Dxc ||
             compilerType == PassThroughMode::Glslang)
         {
-            auto entryPointIndex = getSingleEntryPointIndex();
+            const auto entryPointIndices = getEntryPointIndices();
+            auto targetReq = getTargetReq();
 
-            auto entryPoint = getEntryPoint(entryPointIndex);
-            auto profile = getEffectiveProfile(entryPoint, getTargetReq());
+            const auto entryPointIndicesCount = entryPointIndices.getCount();
+             
+            if (entryPointIndicesCount == 0 && compilerType == PassThroughMode::Dxc)
+            {
+                // Can support no entry points on DXC because we can build libraries
+                profile = targetReq->getTargetProfile();
+            }
+            else if (entryPointIndicesCount == 1)
+            {
+                // All support a single entry point
+                const Index entryPointIndex = entryPointIndices[0];
 
-            options.stage = SlangStage(profile.getStage());
+                auto entryPoint = getEntryPoint(entryPointIndex);
+                profile = getEffectiveProfile(entryPoint, targetReq);
 
-            // Set the entry point name
-            options.entryPointName = getText(entryPoint->getName());
-            auto entryPointNameOverride = getProgram()->getEntryPointNameOverride(entryPointIndex);
-            if (entryPointNameOverride.getLength() != 0)
+                options.entryPointName = getText(entryPoint->getName());
+                auto entryPointNameOverride = getProgram()->getEntryPointNameOverride(entryPointIndex);
+                if (entryPointNameOverride.getLength() != 0)
+                {
+                    options.entryPointName = entryPointNameOverride;
+                }
+            }
+            else 
             {
-                options.entryPointName = entryPointNameOverride;
+                // We only support a single entry point on this target
+                SLANG_ASSERT(!"Can only compile with a single entry point on this target");
+                return SLANG_FAIL;
             }
+            
+            options.stage = SlangStage(profile.getStage());
+
             if (compilerType == PassThroughMode::Dxc)
             {
                 // We will enable the flag to generate proper code for 16 - bit types
@@ -1229,20 +1251,12 @@ void printDiagnosticArg(StringBuilder& sb, CodeGenTarget val)
                     options.flags |= CompileOptions::Flag::EnableFloat16;
                 }
 
-                // Only set the profile if the stage is set
-                if (options.stage != SLANG_STAGE_NONE)
-                {
-                    options.profileName = GetHLSLProfileName(profile);
-                }
-
                 // Set the matrix layout
                 options.matrixLayout = getTargetReq()->getDefaultMatrixLayoutMode();
             }
-            else if (compilerType == PassThroughMode::Fxc)
-            {
-                // Set the profile
-                options.profileName = GetHLSLProfileName(profile);
-            }
+
+            // Set the profile
+            options.profileName = GetHLSLProfileName(profile);
         }
 
         // If we aren't using LLVM 'host callable', we want downstream compile to produce a shared library
-- 
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