This restricts BIT_FIELD_REFs we create to ones operating on
mode-precision entities (iff INTEGRAL_TYPE_P). This avoids
issues with endianess when expanding them.
No testcase, BE folks have to come up with sth suitable for
the testsuite.
Bootstrapped and tested on x86_64-unknown-linux-gnu, app
The following fixes PR88739, VN figuring equivalences that later
lead to code insertions for code hoisting using a possibly overflowing
computation that wasn't done unconditionally before.
It is now possible to verify this with the new VN scheme. Still
a more complete fix is pending (there's a
