State of gfortran regressions

[Thomas Koenig]

Hello world,

even if the gcc 8 release is still some time away, we should consider
spending some effort on fixing the regressions.

Here is a current list of the gcc-8 regressions, with some comments from
my side.

PR 82976 - non-trivial conversion at assignment since r254526
This one is a bit of a mystery to debug - it happens, it is
reproducible, but the *.original tree dump shows nothing.

PR 83999 - an ICE-on-valid with a class pointer assignment.
Has not yet been bisected to a revision.

PR 84135 - a coarray issue, maybe fairly easy to fix, a missing
NULL check.

PR 84615 - it seems that, with the size_t string lengths, -m32 got
broken for character arguments:-(  This is actually a fairly serious
one. If we cannot fix that one in time for the gcc-8 release, we should
consider reverting the new string length patch. I'm going to take a
look, but I won't be offended if anybody else beats me to it :-)

PR 82972 and 83088 - two -finit-derived bugs. Fritz, you have assigned
the first one to yourself. What are your plans with this?

PR 84487. Another mystery - rodata increases a lot for a test case.
I have compared the assembly listings, and I don't understand
why that happens.

PR 84848 - a HP-PA failure. So far, no gfortran maintainer
has reproduced this on a system he has access to.

PR 83705, a corner case where REPEAT doesn't work for incredibly
large values when simplifying. Probably the least important of
all the bugs.

There are also 21 7/8 regressions, which I will also look through
to see if there is anything that I could get a handle on.

Comments?

Regards

	Thomas