We used to assume that the CXXRecordDecl passed to the 1st argument
always had a definition. This is not true since a pointer to an
incomplete type was not excluded.
Fixes https://github.com/llvm/llvm-project/issues/63506
This patch makes the bit-fields wider, and also implement a small optimization for `PseudoObjectExprBitfields`, when there is no result in `PseudoObjectExpr`, we use 32 bits to store the number of subexpressions, otherwise, we use 16 bits to store the number of subexpressions, and use 16 bits to store the result indexes.
Fixes https://github.com/llvm/llvm-project/issues/63169
Reviewed By: aaron.ballman
Differential Revision: https://reviews.llvm.org/D154784
Compared to the old implementation:
* In C++, we only recurse into aggregate classes.
* Unnamed bit-fields are not printed.
* Constant evaluation is supported.
* Proper conversion is done when passing arguments through `...`.
* Additional arguments are supported and are injected prior to the
format string; this directly supports use with `fprintf`, for example.
* An arbitrary callable can be passed rather than only a function
pointer. In particular, in C++, a function template or overload set is
acceptable.
* All text generated by Clang is printed via `%s` rather than directly;
this avoids issues where Clang's pretty-printing output might itself
contain a `%` character.
* Fields of types that we don't know how to print are printed with a
`"*%p"` format and passed by address to the print function.
* No return value is produced.
Reviewed By: aaron.ballman, erichkeane, yihanaa
Differential Revision: https://reviews.llvm.org/D124221
