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0f54a73b99
Since PR96435, both boolean objects and expressions have been evaluated
in the following way.
(*(ubyte*)&obj_or_expr) & 1
It has been noted that sometimes this can cause the back-end to optimize
in non-obvious ways - in particular with __builtin_expect.
This @safe feature is now restricted to just when reading the value of a
bool field that comes from a union.
PR d/110359
gcc/d/ChangeLog:
* d-convert.cc (convert_for_rvalue): Only apply the @safe boolean
conversion to boolean fields of a union.
(convert_for_condition): Call convert_for_rvalue in the default case.
gcc/testsuite/ChangeLog:
* gdc.dg/pr110359.d: New test.
(cherry picked from commit ab98db1e8c)
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