[clang][bytecode] Use record layout in `Pointer::computeOffsetForComparison()` (#172322) Our internal representation for records does not include things like alignment of the fields or padding bits, so we can't only rely on those values, not even for just comparing two pointers. Try to look up the offsets from the `ASTRecordLayout` instead. Fixes https://github.com/llvm/llvm-project/issues/172165 --------- Co-authored-by: Shafik Yaghmour <shafik.yaghmour@intel.com>
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