Improvements and bug fixes for global type parameters

1. allow spReflection_FindTypeByName to accept arbitrary type expression string
2. allow const int generic value to be used as expression value, and as array size
3. various bug fixes in witness table specialization / function cloning during specializeIRForEntryPoint to avoid creating duplicate global values, not copying the right definition of a function from the other module, not cloning witness tables that are required by specializeGenerics etc.

1 files changed, 31 insertions, 0 deletions

diff --git a/tests/compute/globalTypeParamArrayShared.slang b/tests/compute/globalTypeParamArrayShared.slang
new file mode 100644
index 000000000..65d09f14e
--- /dev/null
+++ b/tests/compute/globalTypeParamArrayShared.slang
@@ -0,0 +1,31 @@
+interface IBase
+{
+    float compute<T>(T g);
+}
+struct Base:IBase
+{
+    float b;
+    float compute<T>(T g) { return b; }
+};
+
+struct Pair<T1:IBase, T2:IBase> : IBase
+{
+    T1 head;
+    T2 tail;
+    float compute<T>(T g)
+    {
+        return head.compute(g) + tail.compute(g);
+    }
+};
+
+struct Arr<T:IBase, let N:int> : IBase
+{
+    T base[N];  // = 1.0
+    float compute<T>(T g)
+    {
+        float sum = 0.0;
+        for (int i = 0; i < N; i++)
+            sum += base[i].compute(g);
+        return sum;
+    }
+};