Fix nullptr in generic specialization (#6066)

* Fix nullptr in generic specialization

* Fix formatting

* Revert "Fix nullptr in generic specialization" and add emitPtrLit instead

* Add type parameter to getPtrValue()

---------

Co-authored-by: Yong He <yonghe@outlook.com>

1 files changed, 14 insertions, 6 deletions

diff --git a/source/slang/slang-ir-clone.cpp b/source/slang/slang-ir-clone.cpp
index 6bbaefa26..66af405d6 100644
--- a/source/slang/slang-ir-clone.cpp
+++ b/source/slang/slang-ir-clone.cpp
@@ -51,6 +51,20 @@ IRInst* cloneInstAndOperands(IRCloneEnv* env, IRBuilder* builder, IRInst* oldIns
     SLANG_ASSERT(builder);
     SLANG_ASSERT(oldInst);
 
+    // We start by mapping the type of the orignal instruction
+    // to its replacement value, if any.
+    //
+    auto oldType = oldInst->getFullType();
+    auto newType = (IRType*)findCloneForOperand(env, oldType);
+
+    // Pointer literals need to be handled separately, as they carry other data
+    // than just the operands.
+    if (oldInst->getOp() == kIROp_PtrLit)
+    {
+        auto oldPtr = as<IRPtrLit>(oldInst);
+        return builder->getPtrValue(newType, oldPtr->value.ptrVal);
+    }
+
     // This logic will not handle any instructions
     // with special-case data attached, but that only
     // applies to `IRConstant`s at this point, and those
@@ -62,12 +76,6 @@ IRInst* cloneInstAndOperands(IRCloneEnv* env, IRBuilder* builder, IRInst* oldIns
     //
     SLANG_ASSERT(!as<IRConstant>(oldInst));
 
-    // We start by mapping the type of the orignal instruction
-    // to its replacement value, if any.
-    //
-    auto oldType = oldInst->getFullType();
-    auto newType = (IRType*)findCloneForOperand(env, oldType);
-
     // Next we will iterate over the operands of `oldInst`
     // to find their replacements and install them as
     // the operands of `newInst`.