All compiler fixes to get ir branch work with falcor feature demo.

- support overloaded generic function. this involves adding a new expression type, `OverloadedExpr2` to hold the candidate expressions for the generic function decl being referenced.
- make BitNot a normal IROp instead of an IRPseudoOp
- make sure we clone the decorations of parameters when cloning ir functions
- propagate geometry shader entry point attributes (`[maxvertexcount]` and `[instance]`) through HLSL emit
- IR emit: handle geometry shader entry-point parameter decorations, such as 'triangle'.
- IR emit: treat geometry shader stream output typed ir value as `should fold into use`.

1 files changed, 12 insertions, 0 deletions

diff --git a/source/slang/expr-defs.h b/source/slang/expr-defs.h
index e3c16a674..4b47cc883 100644
--- a/source/slang/expr-defs.h
+++ b/source/slang/expr-defs.h
@@ -30,6 +30,18 @@ SYNTAX_CLASS(OverloadedExpr, Expr)
     FIELD(LookupResult, lookupResult2)
 END_SYNTAX_CLASS()
 
+// An expression that references an overloaded set of declarations
+// having the same name.
+SYNTAX_CLASS(OverloadedExpr2, Expr)
+
+    // Optional: the base expression is this overloaded result
+    // arose from a member-reference expression.
+    SYNTAX_FIELD(RefPtr<Expr>, base)
+
+    // The lookup result that was ambiguous
+    FIELD(List<RefPtr<Expr>>, candidiateExprs)
+END_SYNTAX_CLASS()
+
 SYNTAX_CLASS(ConstantExpr, Expr)
     FIELD(Token, token)