[llvm] Omit member size from DWARF when desired (PR #161423)

[Vladislav Dzhidzhoev via llvm-commits]

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@@ -1889,7 +1889,10 @@ DIE &DwarfUnit::constructMemberDIE(DIE &Buffer, const DIDerivedType *DT) {
     bool IsBitfield = DT->isBitField();
 
     // Handle the size.
-    if (auto *Var = dyn_cast_or_null<DIVariable>(DT->getRawSizeInBits())) {
+    if (DT->getRawSizeInBits() == nullptr) {
+      // No size, just ignore.
+    } else if (auto *Var =
+                   dyn_cast_or_null<DIVariable>(DT->getRawSizeInBits())) {
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dzhidzhoev wrote:

Should dyn_cast_or_null be replaced with dyn_cast here and in the else-if clause below?

https://github.com/llvm/llvm-project/pull/161423