Make precompileForTargets work with Slang API (#4845)

* Make precompileForTargets work with Slang API

precompileForTargets, renamed to precompileForTarget, does not need
an EndToEndCompileRequest and some objects created from it are not
necessary either.

Take only a target enum and a diagnostic blob as input and handle
everything else internally, such as creating the TargetReq with
chosen profile.

Fixes #4790

* Update slang-module.cpp

* Update slang-module.cpp

1 files changed, 33 insertions, 3 deletions

diff --git a/tools/gfx-unit-test/precompiled-module-2.cpp b/tools/gfx-unit-test/precompiled-module-2.cpp
index 3da77e05c..93b9d1b89 100644
--- a/tools/gfx-unit-test/precompiled-module-2.cpp
+++ b/tools/gfx-unit-test/precompiled-module-2.cpp
@@ -17,7 +17,8 @@ namespace gfx_test
     static Slang::Result precompileProgram(
         gfx::IDevice* device,
         ISlangMutableFileSystem* fileSys,
-        const char* shaderModuleName)
+        const char* shaderModuleName,
+        bool precompileToTarget)
     {
         Slang::ComPtr<slang::ISession> slangSession;
         SLANG_RETURN_ON_FAIL(device->getSlangSession(slangSession.writeRef()));
@@ -34,6 +35,20 @@ namespace gfx_test
         if (!module)
             return SLANG_FAIL;
 
+        if (precompileToTarget)
+        {
+            SlangCompileTarget target;
+            switch (device->getDeviceInfo().deviceType)
+            {
+            case gfx::DeviceType::DirectX12:
+                target = SLANG_DXIL;
+                break;
+            default:
+                return SLANG_FAIL;
+            }
+            module->precompileForTarget(target, diagnosticsBlob.writeRef());
+        }
+
         // Write loaded modules to memory file system.
         for (SlangInt i = 0; i < slangSession->getLoadedModuleCount(); i++)
         {
@@ -50,7 +65,7 @@ namespace gfx_test
         return SLANG_OK;
     }
 
-    void precompiledModule2TestImpl(IDevice* device, UnitTestContext* context)
+    void precompiledModule2TestImplCommon(IDevice* device, UnitTestContext* context, bool precompileToTarget)
     {
         Slang::ComPtr<ITransientResourceHeap> transientHeap;
         ITransientResourceHeap::Desc transientHeapDesc = {};
@@ -63,7 +78,7 @@ namespace gfx_test
 
         ComPtr<IShaderProgram> shaderProgram;
         slang::ProgramLayout* slangReflection;
-        GFX_CHECK_CALL_ABORT(precompileProgram(device, memoryFileSystem.get(), "precompiled-module-imported"));
+        GFX_CHECK_CALL_ABORT(precompileProgram(device, memoryFileSystem.get(), "precompiled-module-imported", precompileToTarget));
 
         // Next, load the precompiled slang program.
         Slang::ComPtr<slang::ISession> slangSession;
@@ -168,11 +183,26 @@ namespace gfx_test
             Slang::makeArray<float>(3.0f, 3.0f, 3.0f, 3.0f));
     }
 
+    void precompiledModule2TestImpl(IDevice* device, UnitTestContext* context)
+    {
+        precompiledModule2TestImplCommon(device, context, false);
+    }
+
+    void precompiledTargetModule2TestImpl(IDevice* device, UnitTestContext* context)
+    {
+        precompiledModule2TestImplCommon(device, context, true);
+    }
+
     SLANG_UNIT_TEST(precompiledModule2D3D12)
     {
         runTestImpl(precompiledModule2TestImpl, unitTestContext, Slang::RenderApiFlag::D3D12);
     }
 
+    SLANG_UNIT_TEST(precompiledTargetModule2D3D12)
+    {
+        runTestImpl(precompiledTargetModule2TestImpl, unitTestContext, Slang::RenderApiFlag::D3D12);
+    }
+
     SLANG_UNIT_TEST(precompiledModule2Vulkan)
     {
         runTestImpl(precompiledModule2TestImpl, unitTestContext, Slang::RenderApiFlag::Vulkan);