Add texture tri-linear autodiff example. (#2715)

* Add quad texture example.

* delete output image

* remove irrelavent files

* update project files

* fix

* Update example.

* Fix.

* remove out-texture

---------

Co-authored-by: Yong He <yhe@nvidia.com>

2 files changed, 31 insertions, 15 deletions

diff --git a/source/slang/slang-check-decl.cpp b/source/slang/slang-check-decl.cpp
index 2613e6430..3779f48e3 100644
--- a/source/slang/slang-check-decl.cpp
+++ b/source/slang/slang-check-decl.cpp
@@ -6934,9 +6934,12 @@ namespace Slang
             arg->type.isLeftValue = param->findModifier<OutModifier>() ? true : false;
             arg->type.type = param->getType();
             arg->loc = loc;
-            if (auto pairType = visitor->getDifferentialPairType(param->getType()))
+            if (!param->findModifier<NoDiffModifier>())
             {
-                arg->type.type = pairType;
+                if (auto pairType = visitor->getDifferentialPairType(param->getType()))
+                {
+                    arg->type.type = pairType;
+                }
             }
             imaginaryArguments.add(arg);
         }
@@ -6958,18 +6961,26 @@ namespace Slang
             arg->type.isLeftValue = param->findModifier<OutModifier>() ? true : false;
             arg->type.type = param->getType();
             arg->loc = loc;
-            if (auto pairType = as<DifferentialPairType>(visitor->getDifferentialPairType(param->getType())))
+            bool isDiffParam = (!param->findModifier<NoDiffModifier>());
+            if (isDiffParam)
             {
-                arg->type.type = pairType;
-                if (isOutParam(param))
+                if (auto pairType = as<DifferentialPairType>(visitor->getDifferentialPairType(param->getType())))
                 {
-                    // out T -> in T.Differential
-                    arg->type.isLeftValue = false;
-                    arg->type.type = visitor->tryGetDifferentialType(
-                        visitor->getASTBuilder(), pairType->getPrimalType());
+                    arg->type.type = pairType;
+                    if (isOutParam(param))
+                    {
+                        // out T -> in T.Differential
+                        arg->type.isLeftValue = false;
+                        arg->type.type = visitor->tryGetDifferentialType(
+                            visitor->getASTBuilder(), pairType->getPrimalType());
+                    }
+                }
+                else
+                {
+                    isDiffParam = false;
                 }
             }
-            else
+            if (!isDiffParam)
             {
                 if (isOutParam(param))
                 {
@@ -7010,7 +7021,7 @@ namespace Slang
         HigherOrderInvokeExpr* higherOrderFuncExpr = visitor->getASTBuilder()->create<TDifferentiateExpr>();
         higherOrderFuncExpr->baseFunction = derivativeOfAttr->funcExpr;
         higherOrderFuncExpr->loc = derivativeOfAttr->loc;
-        Expr* checkedHigherOrderFuncExpr = visitor->dispatchExpr(higherOrderFuncExpr, *visitor);
+        Expr* checkedHigherOrderFuncExpr = visitor->dispatchExpr(higherOrderFuncExpr, visitor->allowStaticReferenceToNonStaticMember());
         if (!checkedHigherOrderFuncExpr)
         {
             visitor->getSink()->diagnose(derivativeOfAttr, Diagnostics::cannotResolveOriginalFunctionForDerivative);
diff --git a/source/slang/slang-ir-autodiff-fwd.cpp b/source/slang/slang-ir-autodiff-fwd.cpp
index cf45a83f5..ac4e3825a 100644
--- a/source/slang/slang-ir-autodiff-fwd.cpp
+++ b/source/slang/slang-ir-autodiff-fwd.cpp
@@ -525,10 +525,14 @@ InstPair ForwardDiffTranscriber::transcribeCall(IRBuilder* builder, IRCall* orig
         return InstPair(primalCall, nullptr);
     }
 
-    auto calleeType = _getCalleeActualFuncType(diffCallee);
+    auto calleeType = _getCalleeActualFuncType(primalCallee);
     SLANG_ASSERT(calleeType);
     SLANG_RELEASE_ASSERT(calleeType->getParamCount() == origCall->getArgCount());
 
+    auto diffCalleeType = _getCalleeActualFuncType(diffCallee);
+    SLANG_ASSERT(diffCalleeType);
+    SLANG_RELEASE_ASSERT(diffCalleeType->getParamCount() == origCall->getArgCount());
+
     auto placeholderCall = builder->emitCallInst(nullptr, builder->emitUndefined(builder->getTypeKind()), 0, nullptr);
     builder->setInsertBefore(placeholderCall);
     IRBuilder argBuilder = *builder;
@@ -545,8 +549,9 @@ InstPair ForwardDiffTranscriber::transcribeCall(IRBuilder* builder, IRCall* orig
 
         auto origType = origCall->getArg(ii)->getDataType();
         auto primalType = primalArg->getDataType();
-        auto paramType = calleeType->getParamType(ii);
-        if (!isNoDiffType(paramType))
+        auto originalParamType = calleeType->getParamType(ii);
+        auto diffParamType = diffCalleeType->getParamType(ii);
+        if (!isNoDiffType(originalParamType))
         {
             if (isNoDiffType(primalType))
             {
@@ -561,7 +566,7 @@ InstPair ForwardDiffTranscriber::transcribeCall(IRBuilder* builder, IRCall* orig
                 auto pairValType = as<IRDifferentialPairType>(
                     pairPtrType ? pairPtrType->getValueType() : pairType);
                 auto diffType = differentiableTypeConformanceContext.getDifferentialTypeFromDiffPairType(&argBuilder, pairValType);
-                if (auto ptrParamType = as<IRPtrTypeBase>(paramType))
+                if (auto ptrParamType = as<IRPtrTypeBase>(diffParamType))
                 {
                     // Create temp var to pass in/out arguments.
                     auto srcVar = argBuilder.emitVar(ptrParamType->getValueType());