[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, 4 insertions, 3 deletions

diff --git a/clang/lib/AST/ByteCode/Program.h b/clang/lib/AST/ByteCode/Program.h
index ce20626..23ba1bb 100644
--- a/clang/lib/AST/ByteCode/Program.h
+++ b/clang/lib/AST/ByteCode/Program.h
@@ -119,16 +119,17 @@ public:
                                const Type *SourceTy = nullptr,
                                Descriptor::MetadataSize MDSize = std::nullopt,
                                bool IsConst = false, bool IsTemporary = false,
-                               bool IsMutable = false) {
+                               bool IsMutable = false,
+                               bool IsVolatile = false) {
     return allocateDescriptor(D, SourceTy, T, MDSize, IsConst, IsTemporary,
-                              IsMutable);
+                              IsMutable, IsVolatile);
   }
 
   /// Creates a descriptor for a composite type.
   Descriptor *createDescriptor(const DeclTy &D, const Type *Ty,
                                Descriptor::MetadataSize MDSize = std::nullopt,
                                bool IsConst = false, bool IsTemporary = false,
-                               bool IsMutable = false,
+                               bool IsMutable = false, bool IsVolatile = false,
                                const Expr *Init = nullptr);
 
   /// Context to manage declaration lifetimes.