fixup global generic parameters

1. simplify RoundUpToAlignment()
2. add new a render-compute test case to cover the situation where the entry-point interface (parameter/return types of an entry-point function) is dependent on the global generic type.
3. initial fixes to get this test case to compile (but is not producing correct HLSL output yet)

1 files changed, 16 insertions, 1 deletions

diff --git a/source/slang/syntax.cpp b/source/slang/syntax.cpp
index e43dd9074..badfaea4f 100644
--- a/source/slang/syntax.cpp
+++ b/source/slang/syntax.cpp
@@ -1709,7 +1709,22 @@ void Type::accept(IValVisitor* visitor, void* extra)
         return sb.ProduceString();
     }
 
-
+    void insertSubstAtBottom(RefPtr<Substitutions> & substHead, RefPtr<Substitutions> substToInsert)
+    {
+        if (!substHead)
+        {
+            substHead = substToInsert;
+            return;
+        }
+        auto subst = substHead;
+        RefPtr<Substitutions> lastSubst = subst;
+        while (subst->outer)
+        {
+            lastSubst = subst;
+            subst = subst->outer;
+        }
+        lastSubst->outer = substToInsert;
+    }
 
     void insertSubstAtTop(DeclRefBase & declRef, RefPtr<Substitutions> substToInsert)
     {