These tests all require some adjustments to make sure that struct
types still get generated, mostly done by stripping pointer
indirections.
Some of this may no longer test the situation it was originally
intended for, e.g. the issue from pr18962 just doesn't really
exist anymore with opaque pointers, as we no longer generate
recursive types.
This adds -no-opaque-pointers to clang tests whose output will
change when opaque pointers are enabled by default. This is
intended to be part of the migration approach described in
https://discourse.llvm.org/t/enabling-opaque-pointers-by-default/61322/9.
The patch has been produced by replacing %clang_cc1 with
%clang_cc1 -no-opaque-pointers for tests that fail with opaque
pointers enabled. Worth noting that this doesn't cover all tests,
there's a remaining ~40 tests not using %clang_cc1 that will need
a followup change.
Differential Revision: https://reviews.llvm.org/D123115