Support implciit casted swizzled lvalue. (#3077)

* Support implciit casted swizzled lvalue.

* Fix warnings.

* Fix.

* fix comment.

* Prefer mangled linkage name for global params.

* Update tests.

---------

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

1 files changed, 9 insertions, 2 deletions

diff --git a/source/slang/slang-ir-ssa.cpp b/source/slang/slang-ir-ssa.cpp
index 48cf2976f..18eba677e 100644
--- a/source/slang/slang-ir-ssa.cpp
+++ b/source/slang/slang-ir-ssa.cpp
@@ -379,11 +379,18 @@ static void cloneRelevantDecorations(
             break;
 
         case kIROp_PreciseDecoration:
-        case kIROp_NameHintDecoration:
             // Copy these decorations if the target doesn't already have them,
             // but don't make duplicate decorations on the target.
             //
-            if( !val->findDecorationImpl(decoration->getOp()) )
+            if (!val->findDecorationImpl(decoration->getOp()))
+            {
+                cloneDecoration(nullptr, decoration, val, var->getModule());
+            }
+            break;
+        case kIROp_NameHintDecoration:
+            // If the target already contains a linkage decoration, don't add
+            // a name decoration to avoid issues with emit logic.
+            if (!val->findDecorationImpl(decoration->getOp()) && !val->findDecoration<IRLinkageDecoration>())
             {
                 cloneDecoration(nullptr, decoration, val, var->getModule());
             }