[clang][bytecode] Propagate IsVolatile bit to subobjects (#137293)

For
```c++
  struct S {
    constexpr S(int=0) : i(1) {}
    int i;
  };
  constexpr volatile S vs;
```

reading from `vs.i` is not allowed, even though `i` is not volatile
qualified. Propagate the IsVolatile bit down the hierarchy, so we know
reading from `vs.i` is a volatile read.

1 files changed, 3 insertions, 5 deletions

diff --git a/clang/lib/AST/ByteCode/InterpBuiltin.cpp b/clang/lib/AST/ByteCode/InterpBuiltin.cpp
index d8b320f..770511f 100644
--- a/clang/lib/AST/ByteCode/InterpBuiltin.cpp
+++ b/clang/lib/AST/ByteCode/InterpBuiltin.cpp
@@ -1595,11 +1595,9 @@ static bool interp__builtin_operator_new(InterpState &S, CodePtr OpPC,
 
   assert(!ElemT);
   // Structs etc.
-  const Descriptor *Desc = S.P.createDescriptor(
-      NewCall, ElemType.getTypePtr(),
-      IsArray ? std::nullopt : Descriptor::InlineDescMD,
-      /*IsConst=*/false, /*IsTemporary=*/false, /*IsMutable=*/false,
-      /*Init=*/nullptr);
+  const Descriptor *Desc =
+      S.P.createDescriptor(NewCall, ElemType.getTypePtr(),
+                           IsArray ? std::nullopt : Descriptor::InlineDescMD);
 
   if (IsArray) {
     Block *B =