From 8f962894fd38edb47d782d303ac9ff87b3a3bb6a Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Fri, 4 Sep 2020 10:18:44 -0700
Subject: Allow mixing unspecialized and specialized existential parameters.
 (#1533)

* Allow mixing unspecialized and specialized existential parameters.

* Fixes.
---
 source/slang/slang-ir.cpp | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

(limited to 'source/slang/slang-ir.cpp')

diff --git a/source/slang/slang-ir.cpp b/source/slang/slang-ir.cpp
index 2f27bbebc..37841c35f 100644
--- a/source/slang/slang-ir.cpp
+++ b/source/slang/slang-ir.cpp
@@ -2232,6 +2232,8 @@ namespace Slang
         return (IRStringType*)getType(kIROp_StringType);
     }
 
+    IRDynamicType* IRBuilder::getDynamicType() { return (IRDynamicType*)getType(kIROp_DynamicType); }
+
     IRAssociatedType* IRBuilder::getAssociatedType(ArrayView<IRInterfaceType*> constraintTypes)
     {
         return (IRAssociatedType*)getType(kIROp_AssociatedType,
@@ -2331,6 +2333,12 @@ namespace Slang
             operands);
     }
 
+    IRExistentialBoxType* IRBuilder::getExistentialBoxType(IRType* concreteType, IRType* interfaceType)
+    {
+        IRInst* operands[] = {concreteType, interfaceType};
+        return (IRExistentialBoxType*)getType(kIROp_ExistentialBoxType, 2, operands);
+    }
+
     IRArrayTypeBase* IRBuilder::getArrayTypeBase(
         IROp    op,
         IRType* elementType,
@@ -2471,7 +2479,7 @@ namespace Slang
                 // so we just want to return `ExistentialBox<someConcreteType>`.
                 //
                 auto concreteType = (IRType*) slotArgs[0];
-                auto ptrType = getPtrType(kIROp_ExistentialBoxType, concreteType);
+                auto ptrType = getExistentialBoxType(concreteType, (IRType*)baseType);
                 return ptrType;
             }
         }
@@ -2524,6 +2532,14 @@ namespace Slang
         }
     }
 
+    IRInst* IRBuilder::emitGetValueFromExistentialBox(IRType* type, IRInst* existentialBox)
+    {
+        auto inst =
+            createInst<IRInst>(this, kIROp_GetValueFromExistentialBox, type, 1, &existentialBox);
+        addInst(inst);
+        return inst;
+    }
+
 
     IRUndefined* IRBuilder::emitUndefined(IRType* type)
     {
@@ -5273,6 +5289,7 @@ namespace Slang
         case kIROp_Specialize:
         case kIROp_lookup_interface_method:
         case kIROp_getAddr:
+        case kIROp_GetValueFromExistentialBox:
         case kIROp_Construct:
         case kIROp_makeVector:
         case kIROp_MakeMatrix:
-- 
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