[clang] [clang] Better bitfield access units (PR #65742)

[John McCall via cfe-commits]

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@@ -415,12 +424,16 @@ CGRecordLowering::accumulateBitFields(RecordDecl::field_iterator Field,
   uint64_t StartBitOffset, Tail = 0;
   if (isDiscreteBitFieldABI()) {
     for (; Field != FieldEnd; ++Field) {
-      uint64_t BitOffset = getFieldBitOffset(*Field);
+      if (!Field->isBitField()) {
+        assert(Field->isZeroSize(Context) && "non-zero sized non-bitfield");
+        continue;
+      }
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rjmccall wrote:

Per my comment above, this is unnecessary; this should never be possible.

https://github.com/llvm/llvm-project/pull/65742