On 01/11/2018 02:48 PM, Rainer Orth wrote:
Hi Martin,
I am not sure why constant string is not emitted for arm-linux-gnueabihf ?
As far as this issue is concerned, should I simply XFAIL it on arm for now ?
This is not unique to the arm back end but affects other targets
as well, including powerpc64. There's a bug open (PR 83462) for
one of the tests I recently added with the same root cause:
a case not being handled by the strlen pass. I'm tracking this
missed optimization in PR 83543. I would expect handling it
to be fairly easy but it seems that every I think that it turns
out to be anything but. Either way, either fixing 83543 or
marking this failure (and those in PR 83462) XFAIL until it
the optimization is added should work.
I'm seeing the same failure on sparc*-sun-solaris*, and gcc-testresults
shows it on mips64el-unknown-linux-gnu and powerpc-ibm-aix7.2.0.0, too.
XFAILing may become unwieldly if more targets are affected.
Thanks for pointing it out. I see it there as well with
Prathamesh's test case, though not with the test case in
bug 83543. It is the same root cause in both. I agree
that enhancing the strlen pass to handle this case would
be preferable to just xfailing the test. I'm just not
sure it's possible before stage 3 closes. If not, I'll
work on it in GCC 9. Although the details are target-
specific, the limitation affects all targets and so
having a solution will benefit all all of them.
Martin
